用C++编写thrift第一个例子

Table of Contents

• 1. 创建thrift文件
• 2. 生成C++代码
• 3. 编写C++客户端代码
• 4. 例子项目
  • 4.1. 项目目录
  • 4.2. 编译服务端
  • 4.3. 编译客户端
  • 4.4. 运行

1 创建thrift文件

thrift文件非常简单,一个WorkerManager提供了一个ping方法,让客户端通过RPC方式远程调用,模拟icmp协议的ping,看看服务端是否正常.

# worker.thrift
# Dean Chen ([email protected])
#

/**
 * Thrift files can namespace, package, or prefix their output in various
 * target languages.
 */
namespace cpp freebird

/**
 * Defining a removed class named WorkerManager
 */
service WorkerManager {

  /**
   * client calls ping method to make sure service process is active or dead
   */
   void ping()

}

2 生成C++代码

用thrift命令行就可以生成C++代码,包括服务器端代码:

thrift -r --gen cpp -o ../ worker.thrift

上面的命令会在../目录创建gen-cpp目录,里面包含了所有生成的C++代码.

worker_constants.cpp  worker_constants.h  WorkerManager.cpp  WorkerManager.h  
WorkerManager_server.skeleton.cpp  worker_types.cpp  worker_types.h

WorkerManager_server.skeleton.cpp就是C++服务端的main函数入口文件,里面使用了TSimpleServer作为TCP服务,性能较低,但是实现简单,比较合适做进程管理类的接口. 这目前就是我需要的.因为我的一个程序中就是需要能够远程对worker进程进行状态查询和任务控制,而不是传递大量的数据. 下面是自动产生的代码:

// This autogenerated skeleton file illustrates how to build a server.
// You should copy it to another filename to avoid overwriting it.

#include "WorkerManager.h"
#include <thrift/protocol/TBinaryProtocol.h>
#include <thrift/server/TSimpleServer.h>
#include <thrift/transport/TServerSocket.h>
#include <thrift/transport/TBufferTransports.h>

using namespace ::apache::thrift;
using namespace ::apache::thrift::protocol;
using namespace ::apache::thrift::transport;
using namespace ::apache::thrift::server;

using boost::shared_ptr;

using namespace  ::freebird;

class WorkerManagerHandler : virtual public WorkerManagerIf {
 public:
  WorkerManagerHandler() {
    // Your initialization goes here
  }

  /**
   * client calls ping method to make sure service process is active or dead
   */
  void ping() {
    // Your implementation goes here
    printf("ping\n");
  }

};

int main(int argc, char **argv) {
  int port = 9090;
  shared_ptr<WorkerManagerHandler> handler(new WorkerManagerHandler());
  shared_ptr<TProcessor> processor(new WorkerManagerProcessor(handler));
  shared_ptr<TServerTransport> serverTransport(new TServerSocket(port));
  shared_ptr<TTransportFactory> transportFactory(new TBufferedTransportFactory());
  shared_ptr<TProtocolFactory> protocolFactory(new TBinaryProtocolFactory());

  TSimpleServer server(processor, serverTransport, transportFactory, protocolFactory);
  server.serve();
  return 0;
}

3 编写C++客户端代码

客户端程序需要自己编写:

#include <iostream>

#include <thrift/protocol/TBinaryProtocol.h>
#include <thrift/transport/TSocket.h>
#include <thrift/transport/TTransportUtils.h>

#include "../../server/gen-cpp/WorkerManager.h"

using namespace std;
using namespace apache::thrift;
using namespace apache::thrift::protocol;
using namespace apache::thrift::transport;

using namespace freebird;

int main() {
  boost::shared_ptr<TTransport> socket(new TSocket("localhost", 9090));
  boost::shared_ptr<TTransport> transport(new TBufferedTransport(socket));
  boost::shared_ptr<TProtocol> protocol(new TBinaryProtocol(transport));
  WorkerManagerClient client(protocol);

  try {
    transport->open();

    client.ping();
    cout << "ping()" << endl;
    transport->close();
  } catch (TException& tx) {
    cout << "ERROR: " << tx.what() << endl;
  }
}

4 例子项目

项目路径

4.1 项目目录

thrift_base$ tree -L 2
.
├── client
│   ├── builder
│   ├── include
│   └── src
└── server
    ├── builder
    ├── gen-cpp
    └── thrift

4.2 编译服务端

sever目录下除了thrift目录里的thrift文件外,没有任何额外的C++代码gen-cpp是命令行产生的. 用下面的命令进行编译

cd builder
./rebuild.lsp debug_config.lsp

builder/bin目录下的thrift_server是可执行程序

4.3 编译客户端

client目录下src目录里的main.cc文件是唯一手写的代码,编译后在builder/bin目录下出现thrift_client可执行程序. 用下面的命令进行编译

cd builder
./rebuild.lsp debug_config.lsp

4.4 运行

先启动服务端程序,监听9099端口,然后启动客户端程序,调用服务端的ping方法,服务端控制台打印出文字. 一切工作正常.

Author: dean

Created: 2015-12-15 二 20:38

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