gRPC Learning Notes

简介

更多内容参考：https://www.grpc.io/docs/guides/ 

gRPC 是一个高性能、开源和通用的 RPC 框架，面向移动和 HTTP/2 设计。目前提供 C、Java 和 Go 语言版本，分别是：grpc, grpc-java, grpc-go. 其中 C 版本支持 C, C++, Node.js, Python, Ruby, Objective-C, PHP 和 C# 支持.

gRPC 基于 HTTP/2 标准设计，带来诸如双向流、流控、头部压缩、单 TCP 连接上的多复用请求等特。这些特性使得其在移动设备上表现更好，更省电和节省空间占用。

gRPC 是什么？

在 gRPC 里客户端应用可以像调用本地对象一样直接调用另一台不同的机器上服务端应用的方法 ，使得您能够更容易地创建分布式应用和服务。与许多 RPC 系统类似，

gRPC 也是基于以下理念 ：

定义一个服务，指定其能够被远程调用的方法（包含参数和返回类型）。在服务端实现这个接口 ，并运行一个 gRPC 服务器来处理客户端调用。在客户端拥有一个存根能够像服务端一样的方法。

 

gRPC 客户端和服务端可以在多种环境中运行和交互 - 从 google 内部的服务器到你自己的笔记本 ，并且可以用任何 gRPC 支持的语言(#quickstart)来编写。所以，你可以很容易地用 Java 创建一 个 gRPC 服务端，用 Go、Python、Ruby 来创建客户端。此外，Google 最新 API 将有 gRPC 版 本的接口，使你很容易地将 Google 的功能集成到你的应用里。

使用 protocol buffers

gRPC 默认使用 protocol buffers，这是 Google 开源的一套成熟的结构数据序列化机制（当然也 可以使用其他数据格式如 JSON）。

正如你将在下方例子里所看到的，你用 proto files 创建 gRPC 服务，用 protocol buffers 消息类型来定义方法参数和返回类型。

你可以在 Protocol Buffers 文档 (

https：//developers.google.com/protocol-buffers/docs/overview

)找到更多关于 Protocol Buffers 的资料。

Protocol buffers 版本

尽管 protocol buffers 对于开源用户来说已经存在了一段时间，例子内使用的却一种名叫 proto3 的新风格的 protocol buffers，它拥有轻量简化的语法、一些有用的新功能，并且支持更多新语言 。

当前针对 Java 和 C++ 发布了 beta 版本，针对 JavaNano（即 Android Java）发布 alpha 版 本，

在protocol buffers Github 源码库里(https：//github.com/google/protobuf/releases)有 Ruby 支持，

在golang/protobuf Github 源码库(https：//github.com/golang/protobuf)里还 有针对 Go 语言的生成器， 对更多语言的支持正在开发中。

你可以在 proto3 语言指南 (https：//developers.google.com/protocol-buffers/docs/proto3)里找到更多内容，

在与当前 默认版本的发布说明(https：//github.com/google/protobuf/releases)比较，看到两者的主要不 同点。更多关于 proto3 的文档很快就会出现。

虽然你可以使用 proto2 (当前默认的 protocol buffers 版本)， 我们通常建议你在 gRPC 里使用 proto3，因为这样你可以使用 gRPC 支持全部范 围的的语言，

并且能避免 proto2 客户端与 proto3 服务端交互时出现的兼容性问题，反之亦然。

安装gRPC

Java 例子代码在 GitHub 源码库里。你可以运行如下命令克隆源码到本地：

git clone -b v1.24.0 https://github.com/grpc/grpc-java

切换当前目录到grpc-java/examples

cd grpc-java/examples

Run a gRPC application

From the examples directory:

1. Compile the client and server

./gradlew installDist

1. Run the server

 ./build/install/examples/bin/hello-world-server

1. In another terminal, run the client

 ./build/install/examples/bin/hello-world-client

Congratulations! You’ve just run a client-server application with gRPC.

Go获取例子：

go get -u github.com/grpc/grpc-go/examples/helloworld/greeter_client
go get -u github.com/grpc/grpc-go/examples/helloworld/greeter_server

切换当前目录到 examples/helloworld

// Copyright 2015 The gRPC Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
syntax = "proto3";

option java_multiple_files = true;
option java_package = "io.grpc.examples.helloworld";
option java_outer_classname = "HelloWorldProto";
option objc_class_prefix = "HLW";

package helloworld;

// The greeting service definition.
service Greeter {
  // Sends a greeting
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}

// The request message containing the user's name.
message HelloRequest {
  string name = 1;
}

// The response message containing the greetings
message HelloReply {
  string message = 1;
}

构建gRPC-Java

仅当您要更改gRPC-Java或测试/使用gRPC-Java库的未发行版本（例如主HEAD）时，才需要构建。

构建需要JDK 8，因为我们的测试使用TLS。

grpc-java有一个用于protoc的C ++代码生成插件。由于许多Java开发人员没有安装C编译器，也不需要运行或修改代码生成，因此该构建可以跳过它。要跳过，请创建文件 /gradle.properties并添加skipCodegen=true。

然后，要构建，运行：

$ ./gradlew build

要将工件安装到您的Maven本地存储库中以在您自己的项目中使用，请运行：

$ ./gradlew publishToMavenLocal

IntelliJ的注意事项

当您将项目作为Gradle项目导入并将IDE生成/运行操作委托给Gradle时，以IntelliJ进行构建的效果最佳。

您可以在以下位置找到此设置：

      -> Build Tools -> Gradle -> Runner
      -> Delegate IDE build/run actions to gradle.

如何构建代码生成插件

仅当您要更改代码生成时，才需要此部分。大多数用户只需要skipCodegen=true如上所述使用即可。

建立Protobuf

codegen插件是C ++代码，需要protobuf 3.0.0或更高版本。

对于Linux，Mac和MinGW：

git clone https://github.com/google/protobuf.git
cd protobuf
git checkout v3.9.0
 ./autogen.sh
 ./configure --disable-shared
 make
 make check
 sudo make install

如果您熟悉C ++编译和自动工具，你可以指定 --prefix为的Protobuf和使用-I中CXXFLAGS，-L在 LDFLAGS引用它。在构建grpc-java时将使用环境变量。

Protobuf /usr/local默认安装到。

对于Visual C ++，请参阅Protobuf自述文件， 以了解如何编译Protobuf。gRPC-java假定为Release版本。

Linux和MinGW

如果/usr/local/lib不在您的库搜索路径中，则可以通过运行以下命令添加它：

sudo sh -c 'echo /usr/local/lib >> /etc/ld.so.conf'
sudo ldconfig

苹果电脑

Mac OS X的某些版本（例如10.10）没有/usr/local默认文件头文件和库的搜索路径。它将使代码生成的构建失败。要解决此问题，您将需要设置环境变量：

export CXXFLAGS="-I/usr/local/include" LDFLAGS="-L/usr/local/lib"

Visual C ++的注意事项

在Windows和VC ++上构建时，需要为Gradle指定项目属性以找到protobuf：

.\gradlew publishToMavenLocal ^
    -PvcProtobufInclude=C:\path\to\protobuf-3.9.0\src ^
    -PvcProtobufLibs=C:\path\to\protobuf-3.9.0\vsprojects\Release ^
    -PtargetArch=x86_32

由于指定每个构建的那些属性很麻烦，因此您可以\gradle.properties使用如下内容创建：

vcProtobufInclude=C:\\path\\to\\protobuf-3.9.0\\src
vcProtobufLibs=C:\\path\\to\\protobuf-3.9.0\\vsprojects\\Release
targetArch=x86_32

默认情况下，构建脚本将为与系统上安装的Java运行时相同的体系结构构建代码生成。如果您使用的是64位JVM，则会将代码生成为64位编译。由于Protobuf默认情况下仅针对32位构建，因此这targetArch=x86_32是必需的。

Windows上MinGW的注意事项

如果您在Windows上同时安装了MinGW和VC ++，则默认情况下将使用VC ++。要覆盖此默认设置并使用MinGW，请添加-PvcDisable=true 到您的Gradle命令行或添加vcDisable=true到中 \gradle.properties。

不支持的操作系统的注意事项

protoc默认情况下，构建脚本从Maven Central 提取预编译的。我们已经protoc为流行的系统构建了二进制文件，但是它们可能不适用于您的系统。如果protoc无法下载或无法运行，则可以通过将以下属性添加到来使用自己构建的版本 /gradle.properties：

protoc=/path/to/protoc

生成代码：

 

或者在build.gradle中配置好插件

group 'com.mikey'
version '1.0-SNAPSHOT'
//加入grpc插件
apply plugin: 'java'
apply plugin: 'com.google.protobuf'
//源编译和目标编译
sourceCompatibility = 1.8
targetCompatibility = 1.8
repositories {
    // maven库
    def cn = "http://maven.aliyun.com/nexus/content/groups/public/"
    def abroad = "http://central.maven.org/maven2/"
    // 先从url中下载jar若没有找到，则在artifactUrls中寻找
    maven {
        url cn
        artifactUrls abroad
    }
}

dependencies {
    compile group: 'io.netty', name: 'netty-all', version: '4.1.10.Final'
    //protobuf用到的库
    compile group: 'com.google.protobuf', name: 'protobuf-java', version: '3.3.1'
    compile group: 'com.google.protobuf', name: 'protobuf-java-util', version: '3.3.1'
    //thrift的库
    compile group: 'org.apache.thrift', name: 'libthrift', version: '0.12.0'
    //grpc用到的库
    compile 'io.grpc:grpc-netty-shaded:1.20.0'
    compile 'io.grpc:grpc-protobuf:1.20.0'
    compile 'io.grpc:grpc-stub:1.20.0'
}

/**
 *以下都是grpc所使用到的gradle插件
 */
buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.8'
    }
}

protobuf {
    //生成的java代码路径
    generatedFilesBaseDir = "$projectDir/src"
    //
    protoc {
        artifact = "com.google.protobuf:protoc:3.7.1"
    }
    plugins {
        grpc {
            artifact = 'io.grpc:protoc-gen-grpc-java:1.20.0'
        }
    }
    generateProtoTasks {
        all()*.plugins {
            grpc {
                // 生成的 service 文件路径
                setOutputSubDir 'java'
            }
        }
    }
}

build.gradle

 

简单Demo

参考：https://www.grpc.io/docs/tutorials/basic/java/

 proto文件：StudentProto.proto

syntax="proto3";
package com.mikey.grpc;
option java_package = "com.mikey.grpcstream";
option java_outer_classname = "StudentProto";
option java_multiple_files = true;

service StudentService {
    //message 2 message
    rpc GetRealNameByUserName(Request) returns (Response){}
}
message Request {
    string username = 1;
}
message Response {
    string realname = 2;
}

生成代码：

// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: Student.proto

package com.mikey.grpc;

/**
 * Protobuf type {@code com.mikey.grpc.Request}
 */
public  final class Request extends
    com.google.protobuf.GeneratedMessageV3 implements
    // @@protoc_insertion_point(message_implements:com.mikey.grpc.Request)
    RequestOrBuilder {
private static final long serialVersionUID = 0L;
  // Use Request.newBuilder() to construct.
  private Request(com.google.protobuf.GeneratedMessageV3.Builder builder) {
    super(builder);
  }
  private Request() {
    username_ = "";
  }

  @Override
  public final com.google.protobuf.UnknownFieldSet
  getUnknownFields() {
    return this.unknownFields;
  }
  private Request(
      com.google.protobuf.CodedInputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    this();
    if (extensionRegistry == null) {
      throw new NullPointerException();
    }
    int mutable_bitField0_ = 0;
    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
        com.google.protobuf.UnknownFieldSet.newBuilder();
    try {
      boolean done = false;
      while (!done) {
        int tag = input.readTag();
        switch (tag) {
          case 0:
            done = true;
            break;
          case 10: {
            String s = input.readStringRequireUtf8();

            username_ = s;
            break;
          }
          default: {
            if (!parseUnknownField(
                input, unknownFields, extensionRegistry, tag)) {
              done = true;
            }
            break;
          }
        }
      }
    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
      throw e.setUnfinishedMessage(this);
    } catch (java.io.IOException e) {
      throw new com.google.protobuf.InvalidProtocolBufferException(
          e).setUnfinishedMessage(this);
    } finally {
      this.unknownFields = unknownFields.build();
      makeExtensionsImmutable();
    }
  }
  public static final com.google.protobuf.Descriptors.Descriptor
      getDescriptor() {
    return com.mikey.grpc.StudentProto.internal_static_com_mikey_grpc_Request_descriptor;
  }

  @Override
  protected FieldAccessorTable
      internalGetFieldAccessorTable() {
    return com.mikey.grpc.StudentProto.internal_static_com_mikey_grpc_Request_fieldAccessorTable
        .ensureFieldAccessorsInitialized(
            Request.class, Builder.class);
  }

  public static final int USERNAME_FIELD_NUMBER = 1;
  private volatile Object username_;
  /**
   * string username = 1;
   */
  public String getUsername() {
    Object ref = username_;
    if (ref instanceof String) {
      return (String) ref;
    } else {
      com.google.protobuf.ByteString bs =
          (com.google.protobuf.ByteString) ref;
      String s = bs.toStringUtf8();
      username_ = s;
      return s;
    }
  }
  /**
   * string username = 1;
   */
  public com.google.protobuf.ByteString
      getUsernameBytes() {
    Object ref = username_;
    if (ref instanceof String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8(
              (String) ref);
      username_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  private byte memoizedIsInitialized = -1;
  @Override
  public final boolean isInitialized() {
    byte isInitialized = memoizedIsInitialized;
    if (isInitialized == 1) return true;
    if (isInitialized == 0) return false;

    memoizedIsInitialized = 1;
    return true;
  }

  @Override
  public void writeTo(com.google.protobuf.CodedOutputStream output)
                      throws java.io.IOException {
    if (!getUsernameBytes().isEmpty()) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, username_);
    }
    unknownFields.writeTo(output);
  }

  @Override
  public int getSerializedSize() {
    int size = memoizedSize;
    if (size != -1) return size;

    size = 0;
    if (!getUsernameBytes().isEmpty()) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, username_);
    }
    size += unknownFields.getSerializedSize();
    memoizedSize = size;
    return size;
  }

  @Override
  public boolean equals(final Object obj) {
    if (obj == this) {
     return true;
    }
    if (!(obj instanceof Request)) {
      return super.equals(obj);
    }
    Request other = (Request) obj;

    if (!getUsername()
        .equals(other.getUsername())) return false;
    if (!unknownFields.equals(other.unknownFields)) return false;
    return true;
  }

  @Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + USERNAME_FIELD_NUMBER;
    hash = (53 * hash) + getUsername().hashCode();
    hash = (29 * hash) + unknownFields.hashCode();
    memoizedHashCode = hash;
    return hash;
  }

  public static Request parseFrom(
      java.nio.ByteBuffer data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }
  public static Request parseFrom(
      java.nio.ByteBuffer data,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }
  public static Request parseFrom(
      com.google.protobuf.ByteString data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }
  public static Request parseFrom(
      com.google.protobuf.ByteString data,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }
  public static Request parseFrom(byte[] data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }
  public static Request parseFrom(
      byte[] data,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }
  public static Request parseFrom(java.io.InputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input);
  }
  public static Request parseFrom(
      java.io.InputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input, extensionRegistry);
  }
  public static Request parseDelimitedFrom(java.io.InputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseDelimitedWithIOException(PARSER, input);
  }
  public static Request parseDelimitedFrom(
      java.io.InputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
  }
  public static Request parseFrom(
      com.google.protobuf.CodedInputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input);
  }
  public static Request parseFrom(
      com.google.protobuf.CodedInputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input, extensionRegistry);
  }

  @Override
  public Builder newBuilderForType() { return newBuilder(); }
  public static Builder newBuilder() {
    return DEFAULT_INSTANCE.toBuilder();
  }
  public static Builder newBuilder(Request prototype) {
    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
  }
  @Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE
        ? new Builder() : new Builder().mergeFrom(this);
  }

  @Override
  protected Builder newBuilderForType(
      BuilderParent parent) {
    Builder builder = new Builder(parent);
    return builder;
  }
  /**
   * Protobuf type {@code com.mikey.grpc.Request}
   */
  public static final class Builder extends
      com.google.protobuf.GeneratedMessageV3.Builder implements
      // @@protoc_insertion_point(builder_implements:com.mikey.grpc.Request)
      com.mikey.grpc.RequestOrBuilder {
    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return com.mikey.grpc.StudentProto.internal_static_com_mikey_grpc_Request_descriptor;
    }

    @Override
    protected FieldAccessorTable
        internalGetFieldAccessorTable() {
      return com.mikey.grpc.StudentProto.internal_static_com_mikey_grpc_Request_fieldAccessorTable
          .ensureFieldAccessorsInitialized(
              Request.class, Builder.class);
    }

    // Construct using com.mikey.grpc.Request.newBuilder()
    private Builder() {
      maybeForceBuilderInitialization();
    }

    private Builder(
        BuilderParent parent) {
      super(parent);
      maybeForceBuilderInitialization();
    }
    private void maybeForceBuilderInitialization() {
      if (com.google.protobuf.GeneratedMessageV3
              .alwaysUseFieldBuilders) {
      }
    }
    @Override
    public Builder clear() {
      super.clear();
      username_ = "";

      return this;
    }

    @Override
    public com.google.protobuf.Descriptors.Descriptor
        getDescriptorForType() {
      return com.mikey.grpc.StudentProto.internal_static_com_mikey_grpc_Request_descriptor;
    }

    @Override
    public Request getDefaultInstanceForType() {
      return Request.getDefaultInstance();
    }

    @Override
    public Request build() {
      Request result = buildPartial();
      if (!result.isInitialized()) {
        throw newUninitializedMessageException(result);
      }
      return result;
    }

    @Override
    public Request buildPartial() {
      Request result = new Request(this);
      result.username_ = username_;
      onBuilt();
      return result;
    }

    @Override
    public Builder clone() {
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    public Builder addRepeatedField(
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    @Override
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      if (other instanceof Request) {
        return mergeFrom((Request)other);
      } else {
        super.mergeFrom(other);
        return this;
      }
    }

    public Builder mergeFrom(Request other) {
      if (other == Request.getDefaultInstance()) return this;
      if (!other.getUsername().isEmpty()) {
        username_ = other.username_;
        onChanged();
      }
      this.mergeUnknownFields(other.unknownFields);
      onChanged();
      return this;
    }

    @Override
    public final boolean isInitialized() {
      return true;
    }

    @Override
    public Builder mergeFrom(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
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      Request parsedMessage = null;
      try {
        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
        parsedMessage = (Request) e.getUnfinishedMessage();
        throw e.unwrapIOException();
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        if (parsedMessage != null) {
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    private Object username_ = "";
    /**
     * string username = 1;
     */
    public String getUsername() {
      Object ref = username_;
      if (!(ref instanceof String)) {
        com.google.protobuf.ByteString bs =
            (com.google.protobuf.ByteString) ref;
        String s = bs.toStringUtf8();
        username_ = s;
        return s;
      } else {
        return (String) ref;
      }
    }
    /**
     * string username = 1;
     */
    public com.google.protobuf.ByteString
        getUsernameBytes() {
      Object ref = username_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8(
                (String) ref);
        username_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     * string username = 1;
     */
    public Builder setUsername(
        String value) {
      if (value == null) {
    throw new NullPointerException();
  }

      username_ = value;
      onChanged();
      return this;
    }
    /**
     * string username = 1;
     */
    public Builder clearUsername() {

      username_ = getDefaultInstance().getUsername();
      onChanged();
      return this;
    }
    /**
     * string username = 1;
     */
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      if (value == null) {
    throw new NullPointerException();
  }
  checkByteStringIsUtf8(value);

      username_ = value;
      onChanged();
      return this;
    }
    @Override
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    @Override
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        final com.google.protobuf.UnknownFieldSet unknownFields) {
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    }


    // @@protoc_insertion_point(builder_scope:com.mikey.grpc.Request)
  }

  // @@protoc_insertion_point(class_scope:com.mikey.grpc.Request)
  private static final Request DEFAULT_INSTANCE;
  static {
    DEFAULT_INSTANCE = new Request();
  }

  public static Request getDefaultInstance() {
    return DEFAULT_INSTANCE;
  }

  private static final com.google.protobuf.Parser
      PARSER = new com.google.protobuf.AbstractParser() {
    @Override
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        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
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  };

  public static com.google.protobuf.Parser parser() {
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  }

  @Override
  public com.google.protobuf.Parser getParserForType() {
    return PARSER;
  }

  @Override
  public Request getDefaultInstanceForType() {
    return DEFAULT_INSTANCE;
  }

}

Request.java

// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: Student.proto

package com.mikey.grpc;

public interface RequestOrBuilder extends
    // @@protoc_insertion_point(interface_extends:com.mikey.grpc.Request)
    com.google.protobuf.MessageOrBuilder {

  /**
   * string username = 1;
   */
  String getUsername();
  /**
   * string username = 1;
   */
  com.google.protobuf.ByteString
      getUsernameBytes();
}

RequesOrBuildert.java

// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: Student.proto

package com.mikey.grpc;

/**
 * Protobuf type {@code com.mikey.grpc.Response}
 */
public  final class Response extends
    com.google.protobuf.GeneratedMessageV3 implements
    // @@protoc_insertion_point(message_implements:com.mikey.grpc.Response)
    ResponseOrBuilder {
private static final long serialVersionUID = 0L;
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  public static final com.google.protobuf.Descriptors.Descriptor
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    return com.mikey.grpc.StudentProto.internal_static_com_mikey_grpc_Response_descriptor;
  }

  @Override
  protected FieldAccessorTable
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    return com.mikey.grpc.StudentProto.internal_static_com_mikey_grpc_Response_fieldAccessorTable
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    if (!getRealname()
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    return PARSER.parseFrom(data, extensionRegistry);
  }
  public static Response parseFrom(
      com.google.protobuf.ByteString data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }
  public static Response parseFrom(
      com.google.protobuf.ByteString data,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }
  public static Response parseFrom(byte[] data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }
  public static Response parseFrom(
      byte[] data,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }
  public static Response parseFrom(java.io.InputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input);
  }
  public static Response parseFrom(
      java.io.InputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input, extensionRegistry);
  }
  public static Response parseDelimitedFrom(java.io.InputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseDelimitedWithIOException(PARSER, input);
  }
  public static Response parseDelimitedFrom(
      java.io.InputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
  }
  public static Response parseFrom(
      com.google.protobuf.CodedInputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input);
  }
  public static Response parseFrom(
      com.google.protobuf.CodedInputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input, extensionRegistry);
  }

  @Override
  public Builder newBuilderForType() { return newBuilder(); }
  public static Builder newBuilder() {
    return DEFAULT_INSTANCE.toBuilder();
  }
  public static Builder newBuilder(Response prototype) {
    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
  }
  @Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE
        ? new Builder() : new Builder().mergeFrom(this);
  }

  @Override
  protected Builder newBuilderForType(
      BuilderParent parent) {
    Builder builder = new Builder(parent);
    return builder;
  }
  /**
   * Protobuf type {@code com.mikey.grpc.Response}
   */
  public static final class Builder extends
      com.google.protobuf.GeneratedMessageV3.Builder implements
      // @@protoc_insertion_point(builder_implements:com.mikey.grpc.Response)
      com.mikey.grpc.ResponseOrBuilder {
    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return com.mikey.grpc.StudentProto.internal_static_com_mikey_grpc_Response_descriptor;
    }

    @Override
    protected FieldAccessorTable
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      return com.mikey.grpc.StudentProto.internal_static_com_mikey_grpc_Response_fieldAccessorTable
          .ensureFieldAccessorsInitialized(
              Response.class, Builder.class);
    }

    // Construct using com.mikey.grpc.Response.newBuilder()
    private Builder() {
      maybeForceBuilderInitialization();
    }

    private Builder(
        BuilderParent parent) {
      super(parent);
      maybeForceBuilderInitialization();
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    private void maybeForceBuilderInitialization() {
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      super.clear();
      realname_ = "";

      return this;
    }

    @Override
    public com.google.protobuf.Descriptors.Descriptor
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      return com.mikey.grpc.StudentProto.internal_static_com_mikey_grpc_Response_descriptor;
    }

    @Override
    public Response getDefaultInstanceForType() {
      return Response.getDefaultInstance();
    }

    @Override
    public Response build() {
      Response result = buildPartial();
      if (!result.isInitialized()) {
        throw newUninitializedMessageException(result);
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      return result;
    }

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    public Response buildPartial() {
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    @Override
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    @Override
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    }

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      if (!other.getRealname().isEmpty()) {
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        onChanged();
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    @Override
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        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
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        parsedMessage = (Response) e.getUnfinishedMessage();
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        if (parsedMessage != null) {
          mergeFrom(parsedMessage);
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      }
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    }

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    /**
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     */
    public String getRealname() {
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        com.google.protobuf.ByteString bs =
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        realname_ = s;
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    /**
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    public com.google.protobuf.ByteString
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      Object ref = realname_;
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        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8(
                (String) ref);
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        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     * string realname = 2;
     */
    public Builder setRealname(
        String value) {
      if (value == null) {
    throw new NullPointerException();
  }

      realname_ = value;
      onChanged();
      return this;
    }
    /**
     * string realname = 2;
     */
    public Builder clearRealname() {

      realname_ = getDefaultInstance().getRealname();
      onChanged();
      return this;
    }
    /**
     * string realname = 2;
     */
    public Builder setRealnameBytes(
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      if (value == null) {
    throw new NullPointerException();
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      realname_ = value;
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    @Override
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    @Override
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        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }


    // @@protoc_insertion_point(builder_scope:com.mikey.grpc.Response)
  }

  // @@protoc_insertion_point(class_scope:com.mikey.grpc.Response)
  private static final Response DEFAULT_INSTANCE;
  static {
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  public static Response getDefaultInstance() {
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  @Override
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    return PARSER;
  }

  @Override
  public Response getDefaultInstanceForType() {
    return DEFAULT_INSTANCE;
  }

}

Response.java

// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: Student.proto

package com.mikey.grpc;

public interface ResponseOrBuilder extends
    // @@protoc_insertion_point(interface_extends:com.mikey.grpc.Response)
    com.google.protobuf.MessageOrBuilder {

  /**
   * string realname = 2;
   */
  String getRealname();
  /**
   * string realname = 2;
   */
  com.google.protobuf.ByteString
      getRealnameBytes();
}

ResponseOrBuilder.java

// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: Student.proto

package com.mikey.grpc;

public final class StudentProto {
  private StudentProto() {}
  public static void registerAllExtensions(
      com.google.protobuf.ExtensionRegistryLite registry) {
  }

  public static void registerAllExtensions(
      com.google.protobuf.ExtensionRegistry registry) {
    registerAllExtensions(
        (com.google.protobuf.ExtensionRegistryLite) registry);
  }
  static final com.google.protobuf.Descriptors.Descriptor
    internal_static_com_mikey_grpc_Request_descriptor;
  static final 
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  static final com.google.protobuf.Descriptors.Descriptor
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  static final 
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  private static  com.google.protobuf.Descriptors.FileDescriptor
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  static {
    String[] descriptorData = {
      "\n\rStudent.proto\022\016com.mikey.grpc\"\033\n\007Reque" +
      "st\022\020\n\010username\030\001 \001(\t\"\034\n\010Response\022\020\n\010real" +
      "name\030\002 \001(\t2^\n\016StudentService\022L\n\025GetRealN" +
      "ameByUserName\022\027.com.mikey.grpc.Request\032\030" +
      ".com.mikey.grpc.Response\"\000B \n\016com.mikey." +
      "grpcB\014StudentProtoP\001b\006proto3"
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      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
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  // @@protoc_insertion_point(outer_class_scope)
}

StudentProto.java 

服务类：

package com.mikey.grpc;

import static io.grpc.MethodDescriptor.generateFullMethodName;
import static io.grpc.stub.ClientCalls.asyncBidiStreamingCall;
import static io.grpc.stub.ClientCalls.asyncClientStreamingCall;
import static io.grpc.stub.ClientCalls.asyncServerStreamingCall;
import static io.grpc.stub.ClientCalls.asyncUnaryCall;
import static io.grpc.stub.ClientCalls.blockingServerStreamingCall;
import static io.grpc.stub.ClientCalls.blockingUnaryCall;
import static io.grpc.stub.ClientCalls.futureUnaryCall;
import static io.grpc.stub.ServerCalls.asyncBidiStreamingCall;
import static io.grpc.stub.ServerCalls.asyncClientStreamingCall;
import static io.grpc.stub.ServerCalls.asyncServerStreamingCall;
import static io.grpc.stub.ServerCalls.asyncUnaryCall;
import static io.grpc.stub.ServerCalls.asyncUnimplementedStreamingCall;
import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;

/**
 */
//@javax.annotation.Generated(
//    value = "by gRPC proto compiler (version 1.20.0)",
//    comments = "Source: Student.proto")
public final class StudentServiceGrpc {

  private StudentServiceGrpc() {}

  public static final String SERVICE_NAME = "com.mikey.grpc.StudentService";

  // Static method descriptors that strictly reflect the proto.
  private static volatile io.grpc.MethodDescriptor<com.mikey.grpc.Request,
      com.mikey.grpc.Response> getGetRealNameByUserNameMethod;

  @io.grpc.stub.annotations.RpcMethod(
      fullMethodName = SERVICE_NAME + '/' + "GetRealNameByUserName",
      requestType = com.mikey.grpc.Request.class,
      responseType = com.mikey.grpc.Response.class,
      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
  public static io.grpc.MethodDescriptor<com.mikey.grpc.Request,
      com.mikey.grpc.Response> getGetRealNameByUserNameMethod() {
    io.grpc.MethodDescriptor getGetRealNameByUserNameMethod;
    if ((getGetRealNameByUserNameMethod = StudentServiceGrpc.getGetRealNameByUserNameMethod) == null) {
      synchronized (StudentServiceGrpc.class) {
        if ((getGetRealNameByUserNameMethod = StudentServiceGrpc.getGetRealNameByUserNameMethod) == null) {
          StudentServiceGrpc.getGetRealNameByUserNameMethod = getGetRealNameByUserNameMethod = 
              io.grpc.MethodDescriptor.newBuilder()
              .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
              .setFullMethodName(generateFullMethodName(
                  "com.mikey.grpc.StudentService", "GetRealNameByUserName"))
              .setSampledToLocalTracing(true)
              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
                  com.mikey.grpc.Request.getDefaultInstance()))
              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
                  com.mikey.grpc.Response.getDefaultInstance()))
                  .setSchemaDescriptor(new StudentServiceMethodDescriptorSupplier("GetRealNameByUserName"))
                  .build();
          }
        }
     }
     return getGetRealNameByUserNameMethod;
  }

  /**
   * Creates a new async stub that supports all call types for the service
   */
  public static StudentServiceStub newStub(io.grpc.Channel channel) {
    return new StudentServiceStub(channel);
  }

  /**
   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
   */
  public static StudentServiceBlockingStub newBlockingStub(
      io.grpc.Channel channel) {
    return new StudentServiceBlockingStub(channel);
  }

  /**
   * Creates a new ListenableFuture-style stub that supports unary calls on the service
   */
  public static StudentServiceFutureStub newFutureStub(
      io.grpc.Channel channel) {
    return new StudentServiceFutureStub(channel);
  }

  /**
   */
  public static abstract class StudentServiceImplBase implements io.grpc.BindableService {

    /**
     */
    public void getRealNameByUserName(com.mikey.grpc.Request request,
        io.grpc.stub.StreamObserver responseObserver) {
      asyncUnimplementedUnaryCall(getGetRealNameByUserNameMethod(), responseObserver);
    }

    @Override public final io.grpc.ServerServiceDefinition bindService() {
      return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
          .addMethod(
            getGetRealNameByUserNameMethod(),
            asyncUnaryCall(
              new MethodHandlers<
                com.mikey.grpc.Request,
                com.mikey.grpc.Response>(
                  this, METHODID_GET_REAL_NAME_BY_USER_NAME)))
          .build();
    }
  }

  /**
   */
  public static final class StudentServiceStub extends io.grpc.stub.AbstractStub {
    private StudentServiceStub(io.grpc.Channel channel) {
      super(channel);
    }

    private StudentServiceStub(io.grpc.Channel channel,
        io.grpc.CallOptions callOptions) {
      super(channel, callOptions);
    }

    @Override
    protected StudentServiceStub build(io.grpc.Channel channel,
        io.grpc.CallOptions callOptions) {
      return new StudentServiceStub(channel, callOptions);
    }

    /**
     */
    public void getRealNameByUserName(com.mikey.grpc.Request request,
        io.grpc.stub.StreamObserver responseObserver) {
      asyncUnaryCall(
          getChannel().newCall(getGetRealNameByUserNameMethod(), getCallOptions()), request, responseObserver);
    }
  }

  /**
   */
  public static final class StudentServiceBlockingStub extends io.grpc.stub.AbstractStub {
    private StudentServiceBlockingStub(io.grpc.Channel channel) {
      super(channel);
    }

    private StudentServiceBlockingStub(io.grpc.Channel channel,
        io.grpc.CallOptions callOptions) {
      super(channel, callOptions);
    }

    @Override
    protected StudentServiceBlockingStub build(io.grpc.Channel channel,
        io.grpc.CallOptions callOptions) {
      return new StudentServiceBlockingStub(channel, callOptions);
    }

    /**
     */
    public com.mikey.grpc.Response getRealNameByUserName(com.mikey.grpc.Request request) {
      return blockingUnaryCall(
          getChannel(), getGetRealNameByUserNameMethod(), getCallOptions(), request);
    }
  }

  /**
   */
  public static final class StudentServiceFutureStub extends io.grpc.stub.AbstractStub {
    private StudentServiceFutureStub(io.grpc.Channel channel) {
      super(channel);
    }

    private StudentServiceFutureStub(io.grpc.Channel channel,
        io.grpc.CallOptions callOptions) {
      super(channel, callOptions);
    }

    @Override
    protected StudentServiceFutureStub build(io.grpc.Channel channel,
        io.grpc.CallOptions callOptions) {
      return new StudentServiceFutureStub(channel, callOptions);
    }

    /**
     */
    public com.google.common.util.concurrent.ListenableFuture getRealNameByUserName(
        com.mikey.grpc.Request request) {
      return futureUnaryCall(
          getChannel().newCall(getGetRealNameByUserNameMethod(), getCallOptions()), request);
    }
  }

  private static final int METHODID_GET_REAL_NAME_BY_USER_NAME = 0;

  private static final class MethodHandlers implements
      io.grpc.stub.ServerCalls.UnaryMethod,
      io.grpc.stub.ServerCalls.ServerStreamingMethod,
      io.grpc.stub.ServerCalls.ClientStreamingMethod,
      io.grpc.stub.ServerCalls.BidiStreamingMethod {
    private final StudentServiceImplBase serviceImpl;
    private final int methodId;

    MethodHandlers(StudentServiceImplBase serviceImpl, int methodId) {
      this.serviceImpl = serviceImpl;
      this.methodId = methodId;
    }

    @Override
    @SuppressWarnings("unchecked")
    public void invoke(Req request, io.grpc.stub.StreamObserver responseObserver) {
      switch (methodId) {
        case METHODID_GET_REAL_NAME_BY_USER_NAME:
          serviceImpl.getRealNameByUserName((com.mikey.grpc.Request) request,
              (io.grpc.stub.StreamObserver) responseObserver);
          break;
        default:
          throw new AssertionError();
      }
    }

    @Override
    @SuppressWarnings("unchecked")
    public io.grpc.stub.StreamObserver invoke(
        io.grpc.stub.StreamObserver responseObserver) {
      switch (methodId) {
        default:
          throw new AssertionError();
      }
    }
  }

  private static abstract class StudentServiceBaseDescriptorSupplier
      implements io.grpc.protobuf.ProtoFileDescriptorSupplier, io.grpc.protobuf.ProtoServiceDescriptorSupplier {
    StudentServiceBaseDescriptorSupplier() {}

    @Override
    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
      return com.mikey.grpc.StudentProto.getDescriptor();
    }

    @Override
    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
      return getFileDescriptor().findServiceByName("StudentService");
    }
  }

  private static final class StudentServiceFileDescriptorSupplier
      extends StudentServiceBaseDescriptorSupplier {
    StudentServiceFileDescriptorSupplier() {}
  }

  private static final class StudentServiceMethodDescriptorSupplier
      extends StudentServiceBaseDescriptorSupplier
      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
    private final String methodName;

    StudentServiceMethodDescriptorSupplier(String methodName) {
      this.methodName = methodName;
    }

    @Override
    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
      return getServiceDescriptor().findMethodByName(methodName);
    }
  }

  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;

  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
    io.grpc.ServiceDescriptor result = serviceDescriptor;
    if (result == null) {
      synchronized (StudentServiceGrpc.class) {
        result = serviceDescriptor;
        if (result == null) {
          serviceDescriptor = result = io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
              .setSchemaDescriptor(new StudentServiceFileDescriptorSupplier())
              .addMethod(getGetRealNameByUserNameMethod())
              .build();
        }
      }
    }
    return result;
  }
}

StudentServiceGrpc.java

实现类：

package com.mikey.grpc;

import io.grpc.stub.StreamObserver;

/**
 * @ProjectName netty
 * @Author 麦奇
 * @Email [email protected]
 * @Date 10/2/19 10:55 AM
 * @Version 1.0
 * @Description:
 **/

public class StudentServiceImpl extends StudentServiceGrpc.StudentServiceImplBase{

    @Override
    public void getRealNameByUserName(Request request, StreamObserver responseObserver) {

        System.out.println("接收到客户端信息："+request.getUsername());

        responseObserver.onNext(Response.newBuilder().setRealname(request.getUsername()).build());

        responseObserver.onCompleted();

    }
}

StudentServiceImpl.java

客户端：

package com.mikey.grpc;

import io.grpc.ManagedChannel;
import io.grpc.ManagedChannelBuilder;
import io.grpc.stub.ClientCalls;

import java.util.logging.Logger;

/**
 * @ProjectName netty
 * @Author 麦奇
 * @Email [email protected]
 * @Date 10/2/19 11:02 AM
 * @Version 1.0
 * @Description:
 **/

public class GrpcClient {

    private static final Logger logger = Logger.getLogger(GrpcClient.class.getName());

    public static final String HOST_ADDRESS = "localhost";

    public static final Integer PORT = 8899;

    public static void main(String[] args) throws Exception{

        //构建配置
        ManagedChannelBuilder builder = ManagedChannelBuilder.forAddress(HOST_ADDRESS, PORT).usePlaintext(true);
        //传输管道
        ManagedChannel channel = builder.build();
        //构建请求
        Request request = Request.newBuilder().setUsername("麦奇").build();
        //构建非阻塞服务调用
        StudentServiceGrpc.StudentServiceBlockingStub blockingStub = StudentServiceGrpc.newBlockingStub(channel);
        //服务调用并接收返回参数
        Response response = blockingStub.getRealNameByUserName(request);
        //打印信息
        logger.info(response.getRealname());
        //关闭资源
        channel.shutdown();

    }
}

GrpcClient.java

服务器：

package com.mikey.grpc;

import io.grpc.Server;
import io.grpc.ServerBuilder;

import java.util.logging.Logger;

/**
 * @ProjectName netty
 * @Author 麦奇
 * @Email [email protected]
 * @Date 10/2/19 11:02 AM
 * @Version 1.0
 * @Description:
 **/

public class GrpcServer {

    private static final Logger logger = Logger.getLogger(GrpcServer.class.getName());

    public static void main(String[] args) throws Exception{

        Server start = ServerBuilder.forPort(8899)
                .addService(new com.mikey.grpc.StudentServiceImpl())
                .build()
                .start();
        //阻塞
        start.awaitTermination();
        logger.info("Server started, listening on " + start.getPort());
        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                // Use stderr here since the logger may have been reset by its JVM shutdown hook.
                System.err.println("*** shutting down gRPC server since JVM is shutting down");
                start.shutdown();
                System.err.println("*** server shut down");
            }
        });
    }
}

GrpcServer.java

定义不同的服务方法

gRPC lets you define four kinds of service method:

• Unary RPCs where the client sends a single request to the server and gets a single response back, just like a normal function call.

rpc SayHello(HelloRequest) returns (HelloResponse){}

 

• Server streaming RPCs where the client sends a request to the server and gets a stream to read a sequence of messages back. The client reads from the returned stream until there are no more messages. gRPC guarantees message ordering within an individual RPC call.

rpc LotsOfReplies(HelloRequest) returns (stream HelloResponse){}

 

• Client streaming RPCs where the client writes a sequence of messages and sends them to the server, again using a provided stream. Once the client has finished writing the messages, it waits for the server to read them and return its response. Again gRPC guarantees message ordering within an individual RPC call.

rpc LotsOfGreetings(stream HelloRequest) returns (HelloResponse) {}

• Bidirectional streaming RPCs where both sides send a sequence of messages using a read-write stream. The two streams operate independently, so clients and servers can read and write in whatever order they like: for example, the server could wait to receive all the client messages before writing its responses, or it could alternately read a message then write a message, or some other combination of reads and writes. The order of messages in each stream is preserved.

rpc BidiHello(stream HelloRequest) returns (stream HelloResponse){}

We’ll look at the different types of RPC in more detail in the RPC life cycle section below.

package com.mikey.grpcstream;

import io.grpc.stub.ServerCallStreamObserver;
import io.grpc.stub.StreamObserver;

import java.util.logging.Logger;

/**
 * @ProjectName netty
 * @Author 麦奇
 * @Email [email protected]
 * @Date 10/2/19 12:28 PM
 * @Version 1.0
 * @Description:
 **/

public class StudentGrpcImpl extends com.mikey.grpcstream.StudentServiceGrpc.StudentServiceImplBase {

    private static final Logger logger = Logger.getLogger(StudentGrpcImpl.class.getName());

    @Override
    public void getRealNameByUserName(Request request, StreamObserver responseObserver) {
        logger.info("参数："+request.getUsername());
        responseObserver.onNext(Response.newBuilder().setRealname("阿姆斯特朗").build());
        responseObserver.onCompleted();
    }

    @Override
    public void getStudentByAge(Request request, StreamObserver responseObserver) {
        logger.info("参数："+request.getUsername());
        responseObserver.onNext(StudentResponse.newBuilder().setName("里奥").setAge(20).setCity("北京").build());
        responseObserver.onNext(StudentResponse.newBuilder().setName("麦奇").setAge(20).setCity("柳州").build());
        responseObserver.onNext(StudentResponse.newBuilder().setName("达芬奇").setAge(20).setCity("深圳").build());
        responseObserver.onCompleted();
    }

    @Override
    public StreamObserver getStudentByStream(StreamObserver responseObserver) {

        StudentResponse build1 = StudentResponse.newBuilder().setName("1111111111").setAge(111111111).setCity("11111111111").build();
        StudentResponse build2 = StudentResponse.newBuilder().setName("1111111111").setAge(111111111).setCity("11111111111").build();
        StudentResponse build3 = StudentResponse.newBuilder().setName("1111111111").setAge(111111111).setCity("11111111111").build();

       return new StreamObserver() {
           @Override
           public void onNext(StudentResponseList value) {
               
           }
           @Override
           public void onError(Throwable t) {

           }
           @Override
           public void onCompleted() {
               responseObserver.onNext(build1);
               responseObserver.onNext(build2);
               responseObserver.onNext(build3);
               responseObserver.onCompleted();
           }
       };
    }

    @Override
    public StreamObserver biTalk(StreamObserver responseObserver) {
        return new StreamObserver() {
            @Override
            public void onNext(StreamRequest value) {

            }

            @Override
            public void onError(Throwable t) {

            }

            @Override
            public void onCompleted() {

            }
        };
    }
}

StudentGrpcImpl.java

 跨语言调用服务

node.js

syntax="proto3";

package com.mikey.grpc;

option java_package = "com.mikey.grpcstream";

option java_outer_classname = "StudentProto";

option java_multiple_files = true;

service StudentService {
    //message 2 message
    rpc GetRealNameByUserName(Request) returns (Response){}
    //message 2 stream message
    rpc GetStudentByAge(Request) returns (stream StudentResponse){}
    //stream message 2 message
    rpc GetStudentByStream(stream StudentResponseList) returns (StudentResponse){}
    //stream message 2 stream message
    rpc BiTalk(stream StreamRequest) returns (stream StreamResponse){}
}


message Request {
    string username = 1;
}

message Response {
    string realname = 2;
}

message StudentResponse {
    string name = 1;
    int32 age =2;
    string city = 3;
}

message StudentRequest {
    string key = 1;
}

message StudentResponseList {
    repeated StudentResponse studentResponse = 1;
}

message  StreamRequest {
    string request_info = 1;
}
message StreamResponse {
    string response_info = 1;
}

Student.proto

动态生成服务代码

var PROTO_FILE_PATH = '/home/mikey/WebstormProjects/node-grpc/proto/Student.proto';
var grpc = require('grpc');
var grpcService = grpc.load(PROTO_FILE_PATH).com.mikey.grpc

var client = new grpcService.StudentService('localhost:8899',grpc.credentials.createInsecure())

client.GetRealNameByUserName({username:'mikey'}, function(error,respData) {
    console.log(respData)
    });

grpcClient.js

var PROTO_FILE_PATH = '/home/mikey/WebstormProjects/node-grpc/proto/Student.proto';
var grpc = require('grpc');
var grpcService = grpc.load(PROTO_FILE_PATH).com.mikey.grpc;

var server = new grpc.Server();
server.addService(grpcService.StudentService.service,{
    GetRealNameByUserName: GetRealNameByUserName
})

server.bind('localhost:8899',grpc.ServerCredentials.createInsecure());
server.start();

function GetRealNameByUserName(call,callback) {
    console.log("call : "+call.request.username)
    callback(null,{realname: '张三'});
}

function getStudentByAge() {}
function getStudentByStream() {}
function biTalk() {}

grpcServer.js

静态生成服务代码
参考：https://github.com/grpc/grpc/tree/master/examples/node/static_codegen

// 进入proto文件目录
cd ../../protos
// 全局安装grpc工具
npm install -g grpc-tools
// 生成静态代码
grpc_tools_node_protoc --js_out=import_style=commonjs,binary:../node/static_codegen/ --grpc_out=../node/static_codegen --plugin=protoc-gen-grpc=`which grpc_tools_node_protoc_plugin` helloworld.proto
grpc_tools_node_protoc --js_out=import_style=commonjs,binary:../node/static_codegen/route_guide/ --grpc_out=../node/static_codegen/route_guide/ --plugin=protoc-gen-grpc=`which grpc_tools_node_protoc_plugin` route_guide.proto

上面方法我通过 npm install -g grpc-tools 并未安装 grpc_tools_node_protoc 所以通过下面方法来生成

npm install grpc-tools --save-dev

../node_modules/grpc-tools/bin/protoc --js_out=import_style=commonjs,binary:../static_codegen/ --plugin=protoc-gen-grpc=../node_modules/grpc-tools/bin/grpc_node_plugin --grpc_out=../static_codegen/  Student.proto

 

 生成两个pb.js文件

// GENERATED CODE -- DO NOT EDIT!

'use strict';
var grpc = require('grpc');
var Student_pb = require('./Student_pb.js');

function serialize_com_mikey_grpc_Request(arg) {
  if (!(arg instanceof Student_pb.Request)) {
    throw new Error('Expected argument of type com.mikey.grpc.Request');
  }
  return Buffer.from(arg.serializeBinary());
}

function deserialize_com_mikey_grpc_Request(buffer_arg) {
  return Student_pb.Request.deserializeBinary(new Uint8Array(buffer_arg));
}

function serialize_com_mikey_grpc_Response(arg) {
  if (!(arg instanceof Student_pb.Response)) {
    throw new Error('Expected argument of type com.mikey.grpc.Response');
  }
  return Buffer.from(arg.serializeBinary());
}

function deserialize_com_mikey_grpc_Response(buffer_arg) {
  return Student_pb.Response.deserializeBinary(new Uint8Array(buffer_arg));
}

function serialize_com_mikey_grpc_StreamRequest(arg) {
  if (!(arg instanceof Student_pb.StreamRequest)) {
    throw new Error('Expected argument of type com.mikey.grpc.StreamRequest');
  }
  return Buffer.from(arg.serializeBinary());
}

function deserialize_com_mikey_grpc_StreamRequest(buffer_arg) {
  return Student_pb.StreamRequest.deserializeBinary(new Uint8Array(buffer_arg));
}

function serialize_com_mikey_grpc_StreamResponse(arg) {
  if (!(arg instanceof Student_pb.StreamResponse)) {
    throw new Error('Expected argument of type com.mikey.grpc.StreamResponse');
  }
  return Buffer.from(arg.serializeBinary());
}

function deserialize_com_mikey_grpc_StreamResponse(buffer_arg) {
  return Student_pb.StreamResponse.deserializeBinary(new Uint8Array(buffer_arg));
}

function serialize_com_mikey_grpc_StudentResponse(arg) {
  if (!(arg instanceof Student_pb.StudentResponse)) {
    throw new Error('Expected argument of type com.mikey.grpc.StudentResponse');
  }
  return Buffer.from(arg.serializeBinary());
}

function deserialize_com_mikey_grpc_StudentResponse(buffer_arg) {
  return Student_pb.StudentResponse.deserializeBinary(new Uint8Array(buffer_arg));
}

function serialize_com_mikey_grpc_StudentResponseList(arg) {
  if (!(arg instanceof Student_pb.StudentResponseList)) {
    throw new Error('Expected argument of type com.mikey.grpc.StudentResponseList');
  }
  return Buffer.from(arg.serializeBinary());
}

function deserialize_com_mikey_grpc_StudentResponseList(buffer_arg) {
  return Student_pb.StudentResponseList.deserializeBinary(new Uint8Array(buffer_arg));
}


var StudentServiceService = exports.StudentServiceService = {
  // message 2 message
  getRealNameByUserName: {
    path: '/com.mikey.grpc.StudentService/GetRealNameByUserName',
    requestStream: false,
    responseStream: false,
    requestType: Student_pb.Request,
    responseType: Student_pb.Response,
    requestSerialize: serialize_com_mikey_grpc_Request,
    requestDeserialize: deserialize_com_mikey_grpc_Request,
    responseSerialize: serialize_com_mikey_grpc_Response,
    responseDeserialize: deserialize_com_mikey_grpc_Response,
  },
  // message 2 stream message
  getStudentByAge: {
    path: '/com.mikey.grpc.StudentService/GetStudentByAge',
    requestStream: false,
    responseStream: true,
    requestType: Student_pb.Request,
    responseType: Student_pb.StudentResponse,
    requestSerialize: serialize_com_mikey_grpc_Request,
    requestDeserialize: deserialize_com_mikey_grpc_Request,
    responseSerialize: serialize_com_mikey_grpc_StudentResponse,
    responseDeserialize: deserialize_com_mikey_grpc_StudentResponse,
  },
  // stream message 2 message
  getStudentByStream: {
    path: '/com.mikey.grpc.StudentService/GetStudentByStream',
    requestStream: true,
    responseStream: false,
    requestType: Student_pb.StudentResponseList,
    responseType: Student_pb.StudentResponse,
    requestSerialize: serialize_com_mikey_grpc_StudentResponseList,
    requestDeserialize: deserialize_com_mikey_grpc_StudentResponseList,
    responseSerialize: serialize_com_mikey_grpc_StudentResponse,
    responseDeserialize: deserialize_com_mikey_grpc_StudentResponse,
  },
  // stream message 2 stream message
  biTalk: {
    path: '/com.mikey.grpc.StudentService/BiTalk',
    requestStream: true,
    responseStream: true,
    requestType: Student_pb.StreamRequest,
    responseType: Student_pb.StreamResponse,
    requestSerialize: serialize_com_mikey_grpc_StreamRequest,
    requestDeserialize: deserialize_com_mikey_grpc_StreamRequest,
    responseSerialize: serialize_com_mikey_grpc_StreamResponse,
    responseDeserialize: deserialize_com_mikey_grpc_StreamResponse,
  },
};

exports.StudentServiceClient = grpc.makeGenericClientConstructor(StudentServiceService);

Student_grpc_pb.js

/**
 * @fileoverview
 * @enhanceable
 * @suppress {messageConventions} JS Compiler reports an error if a variable or
 *     field starts with 'MSG_' and isn't a translatable message.
 * @public
 */
// GENERATED CODE -- DO NOT EDIT!

var jspb = require('google-protobuf');
var goog = jspb;
var global = Function('return this')();

goog.exportSymbol('proto.com.mikey.grpc.Request', null, global);
goog.exportSymbol('proto.com.mikey.grpc.Response', null, global);
goog.exportSymbol('proto.com.mikey.grpc.StreamRequest', null, global);
goog.exportSymbol('proto.com.mikey.grpc.StreamResponse', null, global);
goog.exportSymbol('proto.com.mikey.grpc.StudentRequest', null, global);
goog.exportSymbol('proto.com.mikey.grpc.StudentResponse', null, global);
goog.exportSymbol('proto.com.mikey.grpc.StudentResponseList', null, global);

/**
 * Generated by JsPbCodeGenerator.
 * @param {Array=} opt_data Optional initial data array, typically from a
 * server response, or constructed directly in Javascript. The array is used
 * in place and becomes part of the constructed object. It is not cloned.
 * If no data is provided, the constructed object will be empty, but still
 * valid.
 * @extends {jspb.Message}
 * @constructor
 */
proto.com.mikey.grpc.Request = function(opt_data) {
  jspb.Message.initialize(this, opt_data, 0, -1, null, null);
};
goog.inherits(proto.com.mikey.grpc.Request, jspb.Message);
if (goog.DEBUG && !COMPILED) {
  proto.com.mikey.grpc.Request.displayName = 'proto.com.mikey.grpc.Request';
}


if (jspb.Message.GENERATE_TO_OBJECT) {
/**
 * Creates an object representation of this proto suitable for use in Soy templates.
 * Field names that are reserved in JavaScript and will be renamed to pb_name.
 * To access a reserved field use, foo.pb_, eg, foo.pb_default.
 * For the list of reserved names please see:
 *     com.google.apps.jspb.JsClassTemplate.JS_RESERVED_WORDS.
 * @param {boolean=} opt_includeInstance Whether to include the JSPB instance
 *     for transitional soy proto support: http://goto/soy-param-migration
 * @return {!Object}
 */
proto.com.mikey.grpc.Request.prototype.toObject = function(opt_includeInstance) {
  return proto.com.mikey.grpc.Request.toObject(opt_includeInstance, this);
};


/**
 * Static version of the {@see toObject} method.
 * @param {boolean|undefined} includeInstance Whether to include the JSPB
 *     instance for transitional soy proto support:
 *     http://goto/soy-param-migration
 * @param {!proto.com.mikey.grpc.Request} msg The msg instance to transform.
 * @return {!Object}
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.Request.toObject = function(includeInstance, msg) {
  var f, obj = {
    username: jspb.Message.getFieldWithDefault(msg, 1, "")
  };

  if (includeInstance) {
    obj.$jspbMessageInstance = msg;
  }
  return obj;
};
}


/**
 * Deserializes binary data (in protobuf wire format).
 * @param {jspb.ByteSource} bytes The bytes to deserialize.
 * @return {!proto.com.mikey.grpc.Request}
 */
proto.com.mikey.grpc.Request.deserializeBinary = function(bytes) {
  var reader = new jspb.BinaryReader(bytes);
  var msg = new proto.com.mikey.grpc.Request;
  return proto.com.mikey.grpc.Request.deserializeBinaryFromReader(msg, reader);
};


/**
 * Deserializes binary data (in protobuf wire format) from the
 * given reader into the given message object.
 * @param {!proto.com.mikey.grpc.Request} msg The message object to deserialize into.
 * @param {!jspb.BinaryReader} reader The BinaryReader to use.
 * @return {!proto.com.mikey.grpc.Request}
 */
proto.com.mikey.grpc.Request.deserializeBinaryFromReader = function(msg, reader) {
  while (reader.nextField()) {
    if (reader.isEndGroup()) {
      break;
    }
    var field = reader.getFieldNumber();
    switch (field) {
    case 1:
      var value = /** @type {string} */ (reader.readString());
      msg.setUsername(value);
      break;
    default:
      reader.skipField();
      break;
    }
  }
  return msg;
};


/**
 * Serializes the message to binary data (in protobuf wire format).
 * @return {!Uint8Array}
 */
proto.com.mikey.grpc.Request.prototype.serializeBinary = function() {
  var writer = new jspb.BinaryWriter();
  proto.com.mikey.grpc.Request.serializeBinaryToWriter(this, writer);
  return writer.getResultBuffer();
};


/**
 * Serializes the given message to binary data (in protobuf wire
 * format), writing to the given BinaryWriter.
 * @param {!proto.com.mikey.grpc.Request} message
 * @param {!jspb.BinaryWriter} writer
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.Request.serializeBinaryToWriter = function(message, writer) {
  var f = undefined;
  f = message.getUsername();
  if (f.length > 0) {
    writer.writeString(
      1,
      f
    );
  }
};


/**
 * optional string username = 1;
 * @return {string}
 */
proto.com.mikey.grpc.Request.prototype.getUsername = function() {
  return /** @type {string} */ (jspb.Message.getFieldWithDefault(this, 1, ""));
};


/** @param {string} value */
proto.com.mikey.grpc.Request.prototype.setUsername = function(value) {
  jspb.Message.setProto3StringField(this, 1, value);
};



/**
 * Generated by JsPbCodeGenerator.
 * @param {Array=} opt_data Optional initial data array, typically from a
 * server response, or constructed directly in Javascript. The array is used
 * in place and becomes part of the constructed object. It is not cloned.
 * If no data is provided, the constructed object will be empty, but still
 * valid.
 * @extends {jspb.Message}
 * @constructor
 */
proto.com.mikey.grpc.Response = function(opt_data) {
  jspb.Message.initialize(this, opt_data, 0, -1, null, null);
};
goog.inherits(proto.com.mikey.grpc.Response, jspb.Message);
if (goog.DEBUG && !COMPILED) {
  proto.com.mikey.grpc.Response.displayName = 'proto.com.mikey.grpc.Response';
}


if (jspb.Message.GENERATE_TO_OBJECT) {
/**
 * Creates an object representation of this proto suitable for use in Soy templates.
 * Field names that are reserved in JavaScript and will be renamed to pb_name.
 * To access a reserved field use, foo.pb_, eg, foo.pb_default.
 * For the list of reserved names please see:
 *     com.google.apps.jspb.JsClassTemplate.JS_RESERVED_WORDS.
 * @param {boolean=} opt_includeInstance Whether to include the JSPB instance
 *     for transitional soy proto support: http://goto/soy-param-migration
 * @return {!Object}
 */
proto.com.mikey.grpc.Response.prototype.toObject = function(opt_includeInstance) {
  return proto.com.mikey.grpc.Response.toObject(opt_includeInstance, this);
};


/**
 * Static version of the {@see toObject} method.
 * @param {boolean|undefined} includeInstance Whether to include the JSPB
 *     instance for transitional soy proto support:
 *     http://goto/soy-param-migration
 * @param {!proto.com.mikey.grpc.Response} msg The msg instance to transform.
 * @return {!Object}
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.Response.toObject = function(includeInstance, msg) {
  var f, obj = {
    realname: jspb.Message.getFieldWithDefault(msg, 2, "")
  };

  if (includeInstance) {
    obj.$jspbMessageInstance = msg;
  }
  return obj;
};
}


/**
 * Deserializes binary data (in protobuf wire format).
 * @param {jspb.ByteSource} bytes The bytes to deserialize.
 * @return {!proto.com.mikey.grpc.Response}
 */
proto.com.mikey.grpc.Response.deserializeBinary = function(bytes) {
  var reader = new jspb.BinaryReader(bytes);
  var msg = new proto.com.mikey.grpc.Response;
  return proto.com.mikey.grpc.Response.deserializeBinaryFromReader(msg, reader);
};


/**
 * Deserializes binary data (in protobuf wire format) from the
 * given reader into the given message object.
 * @param {!proto.com.mikey.grpc.Response} msg The message object to deserialize into.
 * @param {!jspb.BinaryReader} reader The BinaryReader to use.
 * @return {!proto.com.mikey.grpc.Response}
 */
proto.com.mikey.grpc.Response.deserializeBinaryFromReader = function(msg, reader) {
  while (reader.nextField()) {
    if (reader.isEndGroup()) {
      break;
    }
    var field = reader.getFieldNumber();
    switch (field) {
    case 2:
      var value = /** @type {string} */ (reader.readString());
      msg.setRealname(value);
      break;
    default:
      reader.skipField();
      break;
    }
  }
  return msg;
};


/**
 * Serializes the message to binary data (in protobuf wire format).
 * @return {!Uint8Array}
 */
proto.com.mikey.grpc.Response.prototype.serializeBinary = function() {
  var writer = new jspb.BinaryWriter();
  proto.com.mikey.grpc.Response.serializeBinaryToWriter(this, writer);
  return writer.getResultBuffer();
};


/**
 * Serializes the given message to binary data (in protobuf wire
 * format), writing to the given BinaryWriter.
 * @param {!proto.com.mikey.grpc.Response} message
 * @param {!jspb.BinaryWriter} writer
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.Response.serializeBinaryToWriter = function(message, writer) {
  var f = undefined;
  f = message.getRealname();
  if (f.length > 0) {
    writer.writeString(
      2,
      f
    );
  }
};


/**
 * optional string realname = 2;
 * @return {string}
 */
proto.com.mikey.grpc.Response.prototype.getRealname = function() {
  return /** @type {string} */ (jspb.Message.getFieldWithDefault(this, 2, ""));
};


/** @param {string} value */
proto.com.mikey.grpc.Response.prototype.setRealname = function(value) {
  jspb.Message.setProto3StringField(this, 2, value);
};



/**
 * Generated by JsPbCodeGenerator.
 * @param {Array=} opt_data Optional initial data array, typically from a
 * server response, or constructed directly in Javascript. The array is used
 * in place and becomes part of the constructed object. It is not cloned.
 * If no data is provided, the constructed object will be empty, but still
 * valid.
 * @extends {jspb.Message}
 * @constructor
 */
proto.com.mikey.grpc.StudentResponse = function(opt_data) {
  jspb.Message.initialize(this, opt_data, 0, -1, null, null);
};
goog.inherits(proto.com.mikey.grpc.StudentResponse, jspb.Message);
if (goog.DEBUG && !COMPILED) {
  proto.com.mikey.grpc.StudentResponse.displayName = 'proto.com.mikey.grpc.StudentResponse';
}


if (jspb.Message.GENERATE_TO_OBJECT) {
/**
 * Creates an object representation of this proto suitable for use in Soy templates.
 * Field names that are reserved in JavaScript and will be renamed to pb_name.
 * To access a reserved field use, foo.pb_, eg, foo.pb_default.
 * For the list of reserved names please see:
 *     com.google.apps.jspb.JsClassTemplate.JS_RESERVED_WORDS.
 * @param {boolean=} opt_includeInstance Whether to include the JSPB instance
 *     for transitional soy proto support: http://goto/soy-param-migration
 * @return {!Object}
 */
proto.com.mikey.grpc.StudentResponse.prototype.toObject = function(opt_includeInstance) {
  return proto.com.mikey.grpc.StudentResponse.toObject(opt_includeInstance, this);
};


/**
 * Static version of the {@see toObject} method.
 * @param {boolean|undefined} includeInstance Whether to include the JSPB
 *     instance for transitional soy proto support:
 *     http://goto/soy-param-migration
 * @param {!proto.com.mikey.grpc.StudentResponse} msg The msg instance to transform.
 * @return {!Object}
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.StudentResponse.toObject = function(includeInstance, msg) {
  var f, obj = {
    name: jspb.Message.getFieldWithDefault(msg, 1, ""),
    age: jspb.Message.getFieldWithDefault(msg, 2, 0),
    city: jspb.Message.getFieldWithDefault(msg, 3, "")
  };

  if (includeInstance) {
    obj.$jspbMessageInstance = msg;
  }
  return obj;
};
}


/**
 * Deserializes binary data (in protobuf wire format).
 * @param {jspb.ByteSource} bytes The bytes to deserialize.
 * @return {!proto.com.mikey.grpc.StudentResponse}
 */
proto.com.mikey.grpc.StudentResponse.deserializeBinary = function(bytes) {
  var reader = new jspb.BinaryReader(bytes);
  var msg = new proto.com.mikey.grpc.StudentResponse;
  return proto.com.mikey.grpc.StudentResponse.deserializeBinaryFromReader(msg, reader);
};


/**
 * Deserializes binary data (in protobuf wire format) from the
 * given reader into the given message object.
 * @param {!proto.com.mikey.grpc.StudentResponse} msg The message object to deserialize into.
 * @param {!jspb.BinaryReader} reader The BinaryReader to use.
 * @return {!proto.com.mikey.grpc.StudentResponse}
 */
proto.com.mikey.grpc.StudentResponse.deserializeBinaryFromReader = function(msg, reader) {
  while (reader.nextField()) {
    if (reader.isEndGroup()) {
      break;
    }
    var field = reader.getFieldNumber();
    switch (field) {
    case 1:
      var value = /** @type {string} */ (reader.readString());
      msg.setName(value);
      break;
    case 2:
      var value = /** @type {number} */ (reader.readInt32());
      msg.setAge(value);
      break;
    case 3:
      var value = /** @type {string} */ (reader.readString());
      msg.setCity(value);
      break;
    default:
      reader.skipField();
      break;
    }
  }
  return msg;
};


/**
 * Serializes the message to binary data (in protobuf wire format).
 * @return {!Uint8Array}
 */
proto.com.mikey.grpc.StudentResponse.prototype.serializeBinary = function() {
  var writer = new jspb.BinaryWriter();
  proto.com.mikey.grpc.StudentResponse.serializeBinaryToWriter(this, writer);
  return writer.getResultBuffer();
};


/**
 * Serializes the given message to binary data (in protobuf wire
 * format), writing to the given BinaryWriter.
 * @param {!proto.com.mikey.grpc.StudentResponse} message
 * @param {!jspb.BinaryWriter} writer
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.StudentResponse.serializeBinaryToWriter = function(message, writer) {
  var f = undefined;
  f = message.getName();
  if (f.length > 0) {
    writer.writeString(
      1,
      f
    );
  }
  f = message.getAge();
  if (f !== 0) {
    writer.writeInt32(
      2,
      f
    );
  }
  f = message.getCity();
  if (f.length > 0) {
    writer.writeString(
      3,
      f
    );
  }
};


/**
 * optional string name = 1;
 * @return {string}
 */
proto.com.mikey.grpc.StudentResponse.prototype.getName = function() {
  return /** @type {string} */ (jspb.Message.getFieldWithDefault(this, 1, ""));
};


/** @param {string} value */
proto.com.mikey.grpc.StudentResponse.prototype.setName = function(value) {
  jspb.Message.setProto3StringField(this, 1, value);
};


/**
 * optional int32 age = 2;
 * @return {number}
 */
proto.com.mikey.grpc.StudentResponse.prototype.getAge = function() {
  return /** @type {number} */ (jspb.Message.getFieldWithDefault(this, 2, 0));
};


/** @param {number} value */
proto.com.mikey.grpc.StudentResponse.prototype.setAge = function(value) {
  jspb.Message.setProto3IntField(this, 2, value);
};


/**
 * optional string city = 3;
 * @return {string}
 */
proto.com.mikey.grpc.StudentResponse.prototype.getCity = function() {
  return /** @type {string} */ (jspb.Message.getFieldWithDefault(this, 3, ""));
};


/** @param {string} value */
proto.com.mikey.grpc.StudentResponse.prototype.setCity = function(value) {
  jspb.Message.setProto3StringField(this, 3, value);
};



/**
 * Generated by JsPbCodeGenerator.
 * @param {Array=} opt_data Optional initial data array, typically from a
 * server response, or constructed directly in Javascript. The array is used
 * in place and becomes part of the constructed object. It is not cloned.
 * If no data is provided, the constructed object will be empty, but still
 * valid.
 * @extends {jspb.Message}
 * @constructor
 */
proto.com.mikey.grpc.StudentRequest = function(opt_data) {
  jspb.Message.initialize(this, opt_data, 0, -1, null, null);
};
goog.inherits(proto.com.mikey.grpc.StudentRequest, jspb.Message);
if (goog.DEBUG && !COMPILED) {
  proto.com.mikey.grpc.StudentRequest.displayName = 'proto.com.mikey.grpc.StudentRequest';
}


if (jspb.Message.GENERATE_TO_OBJECT) {
/**
 * Creates an object representation of this proto suitable for use in Soy templates.
 * Field names that are reserved in JavaScript and will be renamed to pb_name.
 * To access a reserved field use, foo.pb_, eg, foo.pb_default.
 * For the list of reserved names please see:
 *     com.google.apps.jspb.JsClassTemplate.JS_RESERVED_WORDS.
 * @param {boolean=} opt_includeInstance Whether to include the JSPB instance
 *     for transitional soy proto support: http://goto/soy-param-migration
 * @return {!Object}
 */
proto.com.mikey.grpc.StudentRequest.prototype.toObject = function(opt_includeInstance) {
  return proto.com.mikey.grpc.StudentRequest.toObject(opt_includeInstance, this);
};


/**
 * Static version of the {@see toObject} method.
 * @param {boolean|undefined} includeInstance Whether to include the JSPB
 *     instance for transitional soy proto support:
 *     http://goto/soy-param-migration
 * @param {!proto.com.mikey.grpc.StudentRequest} msg The msg instance to transform.
 * @return {!Object}
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.StudentRequest.toObject = function(includeInstance, msg) {
  var f, obj = {
    key: jspb.Message.getFieldWithDefault(msg, 1, "")
  };

  if (includeInstance) {
    obj.$jspbMessageInstance = msg;
  }
  return obj;
};
}


/**
 * Deserializes binary data (in protobuf wire format).
 * @param {jspb.ByteSource} bytes The bytes to deserialize.
 * @return {!proto.com.mikey.grpc.StudentRequest}
 */
proto.com.mikey.grpc.StudentRequest.deserializeBinary = function(bytes) {
  var reader = new jspb.BinaryReader(bytes);
  var msg = new proto.com.mikey.grpc.StudentRequest;
  return proto.com.mikey.grpc.StudentRequest.deserializeBinaryFromReader(msg, reader);
};


/**
 * Deserializes binary data (in protobuf wire format) from the
 * given reader into the given message object.
 * @param {!proto.com.mikey.grpc.StudentRequest} msg The message object to deserialize into.
 * @param {!jspb.BinaryReader} reader The BinaryReader to use.
 * @return {!proto.com.mikey.grpc.StudentRequest}
 */
proto.com.mikey.grpc.StudentRequest.deserializeBinaryFromReader = function(msg, reader) {
  while (reader.nextField()) {
    if (reader.isEndGroup()) {
      break;
    }
    var field = reader.getFieldNumber();
    switch (field) {
    case 1:
      var value = /** @type {string} */ (reader.readString());
      msg.setKey(value);
      break;
    default:
      reader.skipField();
      break;
    }
  }
  return msg;
};


/**
 * Serializes the message to binary data (in protobuf wire format).
 * @return {!Uint8Array}
 */
proto.com.mikey.grpc.StudentRequest.prototype.serializeBinary = function() {
  var writer = new jspb.BinaryWriter();
  proto.com.mikey.grpc.StudentRequest.serializeBinaryToWriter(this, writer);
  return writer.getResultBuffer();
};


/**
 * Serializes the given message to binary data (in protobuf wire
 * format), writing to the given BinaryWriter.
 * @param {!proto.com.mikey.grpc.StudentRequest} message
 * @param {!jspb.BinaryWriter} writer
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.StudentRequest.serializeBinaryToWriter = function(message, writer) {
  var f = undefined;
  f = message.getKey();
  if (f.length > 0) {
    writer.writeString(
      1,
      f
    );
  }
};


/**
 * optional string key = 1;
 * @return {string}
 */
proto.com.mikey.grpc.StudentRequest.prototype.getKey = function() {
  return /** @type {string} */ (jspb.Message.getFieldWithDefault(this, 1, ""));
};


/** @param {string} value */
proto.com.mikey.grpc.StudentRequest.prototype.setKey = function(value) {
  jspb.Message.setProto3StringField(this, 1, value);
};



/**
 * Generated by JsPbCodeGenerator.
 * @param {Array=} opt_data Optional initial data array, typically from a
 * server response, or constructed directly in Javascript. The array is used
 * in place and becomes part of the constructed object. It is not cloned.
 * If no data is provided, the constructed object will be empty, but still
 * valid.
 * @extends {jspb.Message}
 * @constructor
 */
proto.com.mikey.grpc.StudentResponseList = function(opt_data) {
  jspb.Message.initialize(this, opt_data, 0, -1, proto.com.mikey.grpc.StudentResponseList.repeatedFields_, null);
};
goog.inherits(proto.com.mikey.grpc.StudentResponseList, jspb.Message);
if (goog.DEBUG && !COMPILED) {
  proto.com.mikey.grpc.StudentResponseList.displayName = 'proto.com.mikey.grpc.StudentResponseList';
}
/**
 * List of repeated fields within this message type.
 * @private {!Array}
 * @const
 */
proto.com.mikey.grpc.StudentResponseList.repeatedFields_ = [1];



if (jspb.Message.GENERATE_TO_OBJECT) {
/**
 * Creates an object representation of this proto suitable for use in Soy templates.
 * Field names that are reserved in JavaScript and will be renamed to pb_name.
 * To access a reserved field use, foo.pb_, eg, foo.pb_default.
 * For the list of reserved names please see:
 *     com.google.apps.jspb.JsClassTemplate.JS_RESERVED_WORDS.
 * @param {boolean=} opt_includeInstance Whether to include the JSPB instance
 *     for transitional soy proto support: http://goto/soy-param-migration
 * @return {!Object}
 */
proto.com.mikey.grpc.StudentResponseList.prototype.toObject = function(opt_includeInstance) {
  return proto.com.mikey.grpc.StudentResponseList.toObject(opt_includeInstance, this);
};


/**
 * Static version of the {@see toObject} method.
 * @param {boolean|undefined} includeInstance Whether to include the JSPB
 *     instance for transitional soy proto support:
 *     http://goto/soy-param-migration
 * @param {!proto.com.mikey.grpc.StudentResponseList} msg The msg instance to transform.
 * @return {!Object}
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.StudentResponseList.toObject = function(includeInstance, msg) {
  var f, obj = {
    studentresponseList: jspb.Message.toObjectList(msg.getStudentresponseList(),
    proto.com.mikey.grpc.StudentResponse.toObject, includeInstance)
  };

  if (includeInstance) {
    obj.$jspbMessageInstance = msg;
  }
  return obj;
};
}


/**
 * Deserializes binary data (in protobuf wire format).
 * @param {jspb.ByteSource} bytes The bytes to deserialize.
 * @return {!proto.com.mikey.grpc.StudentResponseList}
 */
proto.com.mikey.grpc.StudentResponseList.deserializeBinary = function(bytes) {
  var reader = new jspb.BinaryReader(bytes);
  var msg = new proto.com.mikey.grpc.StudentResponseList;
  return proto.com.mikey.grpc.StudentResponseList.deserializeBinaryFromReader(msg, reader);
};


/**
 * Deserializes binary data (in protobuf wire format) from the
 * given reader into the given message object.
 * @param {!proto.com.mikey.grpc.StudentResponseList} msg The message object to deserialize into.
 * @param {!jspb.BinaryReader} reader The BinaryReader to use.
 * @return {!proto.com.mikey.grpc.StudentResponseList}
 */
proto.com.mikey.grpc.StudentResponseList.deserializeBinaryFromReader = function(msg, reader) {
  while (reader.nextField()) {
    if (reader.isEndGroup()) {
      break;
    }
    var field = reader.getFieldNumber();
    switch (field) {
    case 1:
      var value = new proto.com.mikey.grpc.StudentResponse;
      reader.readMessage(value,proto.com.mikey.grpc.StudentResponse.deserializeBinaryFromReader);
      msg.addStudentresponse(value);
      break;
    default:
      reader.skipField();
      break;
    }
  }
  return msg;
};


/**
 * Serializes the message to binary data (in protobuf wire format).
 * @return {!Uint8Array}
 */
proto.com.mikey.grpc.StudentResponseList.prototype.serializeBinary = function() {
  var writer = new jspb.BinaryWriter();
  proto.com.mikey.grpc.StudentResponseList.serializeBinaryToWriter(this, writer);
  return writer.getResultBuffer();
};


/**
 * Serializes the given message to binary data (in protobuf wire
 * format), writing to the given BinaryWriter.
 * @param {!proto.com.mikey.grpc.StudentResponseList} message
 * @param {!jspb.BinaryWriter} writer
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.StudentResponseList.serializeBinaryToWriter = function(message, writer) {
  var f = undefined;
  f = message.getStudentresponseList();
  if (f.length > 0) {
    writer.writeRepeatedMessage(
      1,
      f,
      proto.com.mikey.grpc.StudentResponse.serializeBinaryToWriter
    );
  }
};


/**
 * repeated StudentResponse studentResponse = 1;
 * @return {!Array}
 */
proto.com.mikey.grpc.StudentResponseList.prototype.getStudentresponseList = function() {
  return /** @type{!Array} */ (
    jspb.Message.getRepeatedWrapperField(this, proto.com.mikey.grpc.StudentResponse, 1));
};


/** @param {!Array} value */
proto.com.mikey.grpc.StudentResponseList.prototype.setStudentresponseList = function(value) {
  jspb.Message.setRepeatedWrapperField(this, 1, value);
};


/**
 * @param {!proto.com.mikey.grpc.StudentResponse=} opt_value
 * @param {number=} opt_index
 * @return {!proto.com.mikey.grpc.StudentResponse}
 */
proto.com.mikey.grpc.StudentResponseList.prototype.addStudentresponse = function(opt_value, opt_index) {
  return jspb.Message.addToRepeatedWrapperField(this, 1, opt_value, proto.com.mikey.grpc.StudentResponse, opt_index);
};


proto.com.mikey.grpc.StudentResponseList.prototype.clearStudentresponseList = function() {
  this.setStudentresponseList([]);
};



/**
 * Generated by JsPbCodeGenerator.
 * @param {Array=} opt_data Optional initial data array, typically from a
 * server response, or constructed directly in Javascript. The array is used
 * in place and becomes part of the constructed object. It is not cloned.
 * If no data is provided, the constructed object will be empty, but still
 * valid.
 * @extends {jspb.Message}
 * @constructor
 */
proto.com.mikey.grpc.StreamRequest = function(opt_data) {
  jspb.Message.initialize(this, opt_data, 0, -1, null, null);
};
goog.inherits(proto.com.mikey.grpc.StreamRequest, jspb.Message);
if (goog.DEBUG && !COMPILED) {
  proto.com.mikey.grpc.StreamRequest.displayName = 'proto.com.mikey.grpc.StreamRequest';
}


if (jspb.Message.GENERATE_TO_OBJECT) {
/**
 * Creates an object representation of this proto suitable for use in Soy templates.
 * Field names that are reserved in JavaScript and will be renamed to pb_name.
 * To access a reserved field use, foo.pb_, eg, foo.pb_default.
 * For the list of reserved names please see:
 *     com.google.apps.jspb.JsClassTemplate.JS_RESERVED_WORDS.
 * @param {boolean=} opt_includeInstance Whether to include the JSPB instance
 *     for transitional soy proto support: http://goto/soy-param-migration
 * @return {!Object}
 */
proto.com.mikey.grpc.StreamRequest.prototype.toObject = function(opt_includeInstance) {
  return proto.com.mikey.grpc.StreamRequest.toObject(opt_includeInstance, this);
};


/**
 * Static version of the {@see toObject} method.
 * @param {boolean|undefined} includeInstance Whether to include the JSPB
 *     instance for transitional soy proto support:
 *     http://goto/soy-param-migration
 * @param {!proto.com.mikey.grpc.StreamRequest} msg The msg instance to transform.
 * @return {!Object}
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.StreamRequest.toObject = function(includeInstance, msg) {
  var f, obj = {
    requestInfo: jspb.Message.getFieldWithDefault(msg, 1, "")
  };

  if (includeInstance) {
    obj.$jspbMessageInstance = msg;
  }
  return obj;
};
}


/**
 * Deserializes binary data (in protobuf wire format).
 * @param {jspb.ByteSource} bytes The bytes to deserialize.
 * @return {!proto.com.mikey.grpc.StreamRequest}
 */
proto.com.mikey.grpc.StreamRequest.deserializeBinary = function(bytes) {
  var reader = new jspb.BinaryReader(bytes);
  var msg = new proto.com.mikey.grpc.StreamRequest;
  return proto.com.mikey.grpc.StreamRequest.deserializeBinaryFromReader(msg, reader);
};


/**
 * Deserializes binary data (in protobuf wire format) from the
 * given reader into the given message object.
 * @param {!proto.com.mikey.grpc.StreamRequest} msg The message object to deserialize into.
 * @param {!jspb.BinaryReader} reader The BinaryReader to use.
 * @return {!proto.com.mikey.grpc.StreamRequest}
 */
proto.com.mikey.grpc.StreamRequest.deserializeBinaryFromReader = function(msg, reader) {
  while (reader.nextField()) {
    if (reader.isEndGroup()) {
      break;
    }
    var field = reader.getFieldNumber();
    switch (field) {
    case 1:
      var value = /** @type {string} */ (reader.readString());
      msg.setRequestInfo(value);
      break;
    default:
      reader.skipField();
      break;
    }
  }
  return msg;
};


/**
 * Serializes the message to binary data (in protobuf wire format).
 * @return {!Uint8Array}
 */
proto.com.mikey.grpc.StreamRequest.prototype.serializeBinary = function() {
  var writer = new jspb.BinaryWriter();
  proto.com.mikey.grpc.StreamRequest.serializeBinaryToWriter(this, writer);
  return writer.getResultBuffer();
};


/**
 * Serializes the given message to binary data (in protobuf wire
 * format), writing to the given BinaryWriter.
 * @param {!proto.com.mikey.grpc.StreamRequest} message
 * @param {!jspb.BinaryWriter} writer
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.StreamRequest.serializeBinaryToWriter = function(message, writer) {
  var f = undefined;
  f = message.getRequestInfo();
  if (f.length > 0) {
    writer.writeString(
      1,
      f
    );
  }
};


/**
 * optional string request_info = 1;
 * @return {string}
 */
proto.com.mikey.grpc.StreamRequest.prototype.getRequestInfo = function() {
  return /** @type {string} */ (jspb.Message.getFieldWithDefault(this, 1, ""));
};


/** @param {string} value */
proto.com.mikey.grpc.StreamRequest.prototype.setRequestInfo = function(value) {
  jspb.Message.setProto3StringField(this, 1, value);
};



/**
 * Generated by JsPbCodeGenerator.
 * @param {Array=} opt_data Optional initial data array, typically from a
 * server response, or constructed directly in Javascript. The array is used
 * in place and becomes part of the constructed object. It is not cloned.
 * If no data is provided, the constructed object will be empty, but still
 * valid.
 * @extends {jspb.Message}
 * @constructor
 */
proto.com.mikey.grpc.StreamResponse = function(opt_data) {
  jspb.Message.initialize(this, opt_data, 0, -1, null, null);
};
goog.inherits(proto.com.mikey.grpc.StreamResponse, jspb.Message);
if (goog.DEBUG && !COMPILED) {
  proto.com.mikey.grpc.StreamResponse.displayName = 'proto.com.mikey.grpc.StreamResponse';
}


if (jspb.Message.GENERATE_TO_OBJECT) {
/**
 * Creates an object representation of this proto suitable for use in Soy templates.
 * Field names that are reserved in JavaScript and will be renamed to pb_name.
 * To access a reserved field use, foo.pb_, eg, foo.pb_default.
 * For the list of reserved names please see:
 *     com.google.apps.jspb.JsClassTemplate.JS_RESERVED_WORDS.
 * @param {boolean=} opt_includeInstance Whether to include the JSPB instance
 *     for transitional soy proto support: http://goto/soy-param-migration
 * @return {!Object}
 */
proto.com.mikey.grpc.StreamResponse.prototype.toObject = function(opt_includeInstance) {
  return proto.com.mikey.grpc.StreamResponse.toObject(opt_includeInstance, this);
};


/**
 * Static version of the {@see toObject} method.
 * @param {boolean|undefined} includeInstance Whether to include the JSPB
 *     instance for transitional soy proto support:
 *     http://goto/soy-param-migration
 * @param {!proto.com.mikey.grpc.StreamResponse} msg The msg instance to transform.
 * @return {!Object}
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.StreamResponse.toObject = function(includeInstance, msg) {
  var f, obj = {
    responseInfo: jspb.Message.getFieldWithDefault(msg, 1, "")
  };

  if (includeInstance) {
    obj.$jspbMessageInstance = msg;
  }
  return obj;
};
}


/**
 * Deserializes binary data (in protobuf wire format).
 * @param {jspb.ByteSource} bytes The bytes to deserialize.
 * @return {!proto.com.mikey.grpc.StreamResponse}
 */
proto.com.mikey.grpc.StreamResponse.deserializeBinary = function(bytes) {
  var reader = new jspb.BinaryReader(bytes);
  var msg = new proto.com.mikey.grpc.StreamResponse;
  return proto.com.mikey.grpc.StreamResponse.deserializeBinaryFromReader(msg, reader);
};


/**
 * Deserializes binary data (in protobuf wire format) from the
 * given reader into the given message object.
 * @param {!proto.com.mikey.grpc.StreamResponse} msg The message object to deserialize into.
 * @param {!jspb.BinaryReader} reader The BinaryReader to use.
 * @return {!proto.com.mikey.grpc.StreamResponse}
 */
proto.com.mikey.grpc.StreamResponse.deserializeBinaryFromReader = function(msg, reader) {
  while (reader.nextField()) {
    if (reader.isEndGroup()) {
      break;
    }
    var field = reader.getFieldNumber();
    switch (field) {
    case 1:
      var value = /** @type {string} */ (reader.readString());
      msg.setResponseInfo(value);
      break;
    default:
      reader.skipField();
      break;
    }
  }
  return msg;
};


/**
 * Serializes the message to binary data (in protobuf wire format).
 * @return {!Uint8Array}
 */
proto.com.mikey.grpc.StreamResponse.prototype.serializeBinary = function() {
  var writer = new jspb.BinaryWriter();
  proto.com.mikey.grpc.StreamResponse.serializeBinaryToWriter(this, writer);
  return writer.getResultBuffer();
};


/**
 * Serializes the given message to binary data (in protobuf wire
 * format), writing to the given BinaryWriter.
 * @param {!proto.com.mikey.grpc.StreamResponse} message
 * @param {!jspb.BinaryWriter} writer
 * @suppress {unusedLocalVariables} f is only used for nested messages
 */
proto.com.mikey.grpc.StreamResponse.serializeBinaryToWriter = function(message, writer) {
  var f = undefined;
  f = message.getResponseInfo();
  if (f.length > 0) {
    writer.writeString(
      1,
      f
    );
  }
};


/**
 * optional string response_info = 1;
 * @return {string}
 */
proto.com.mikey.grpc.StreamResponse.prototype.getResponseInfo = function() {
  return /** @type {string} */ (jspb.Message.getFieldWithDefault(this, 1, ""));
};


/** @param {string} value */
proto.com.mikey.grpc.StreamResponse.prototype.setResponseInfo = function(value) {
  jspb.Message.setProto3StringField(this, 1, value);
};


goog.object.extend(exports, proto.com.mikey.grpc);

Student_pb.js

 

 客户端

var service = require('../static_codegen/Student_grpc_pb');
var message = require('../static_codegen/Student_pb');

var grpc = require('grpc');

var client = new service.StudentServiceClient('localhost:8899', grpc.credentials.createInsecure());

var request = new message.Request();

request.setUsername('麦奇');

client.getRealNameByUserName(request, function(error, respData) {
    console.log(respData.getRealname());
})

grpcStaticClient.js

 

服务器

var service = require('../static_codegen/Student_grpc_pb');
var message = require('../static_codegen/Student_pb');

var grpc = require('grpc');

var server = new grpc.Server();

server.addService(
    service.StudentServiceService, {
        getRealNameByUserName:getRealNameByUserName,
        getStudentByAge:getStudentByAge(),
        getStudentByStream:getStudentByStream(),
        biTalk:biTalk()
    }
)

server.bind('localhost:8899', grpc.ServerCredentials.createInsecure());

server.start();

function getRealNameByUserName(call,callback) {
    console.log('request:'+call.request.getUsername());
    var response = new message.Response();
    response.setRealname('麦奇蜀素');
    callback(null, response);
}

function getStudentByAge() {}
function getStudentByStream() {}
function biTalk() {}

grpcStaticServer.js