【Thrift/Vertx】关于Thrift和Vertx的服务整合
官网上都有关于Thrift的新手demo示例，本文主要讲解其中一项，就是怎么整合Thrift和Vertx。
Vertx是一种事件驱动的异步框架，需要JDK8支持，开发过程中很多都需要用到lambda表达式。vertx的简要介绍可以参考笔者之前的一篇文章：【Vertx】利用vertx实现websocket数据推送
1，首先定义thrift接口文件
定义thrift文件的规则请参看thrift官网，http://thrift.apache.org/static/files/thrift-20070401.pdf
2，利用thrift的编译程序编译thrift文件
这一操作会生成一系列的java类，这些java类都是服务定义中需要使用到的类，例如本例中的shared和tutorial这两个package下的类（除了tutorial下的CalculatorHandler类）
3，实现服务接口
例如本例中的CalculatorHandler类，里面具体实现了加减乘除。
4，vertx实现http请求处理部分
下面是vertx和thrift整合中的关键代码
import javax.naming.spi.DirStateFactory.Result;
import org.apache.http.impl.client.FutureRequestExecutionMetrics;
import org.apache.thrift.TProcessor;
import org.apache.thrift.protocol.TJSONProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TMemoryBuffer;
import io.vertx.core.AbstractVerticle;
import io.vertx.core.Vertx;
import io.vertx.core.http.HttpMethod;
import io.vertx.ext.web.Router;
import io.vertx.ext.web.handler.CorsHandler;
import tutorial.Calculator;
import tutorial.CalculatorHandler;
public class VertxThriftTest extends AbstractVerticle{
public static void main(String[] args) {
Vertx vertx=Vertx.vertx();
Router router = Router.router(vertx);
//类::方法示例
// vertx.createHttpServer().requestHandler(resquest->{
// router.accept(resquest);
// });
// 解决跨域问题
router.route().handler(
CorsHandler.create("*").allowedMethod(HttpMethod.GET)
.allowedMethod(HttpMethod.POST)
.allowedMethod(HttpMethod.OPTIONS)
.allowedHeader("X-PINGARUNER")
.allowedHeader("Content-Type"));
router.route("/server/*").handler(context->{
context.request().handler(buffer->{
byte[] arr=buffer.getBytes();
vertx.executeBlocking(future->{
String result=thriftRequest(arr);
future.complete(result);
}, res->{
if(res.succeeded()) {
context.response().end(res.result().toString());
}else {
context.response().end(res.cause().getMessage());
}
});
});
});
vertx.createHttpServer().requestHandler(router::accept).listen(8088, res->{
if(res.succeeded()) {
System.out.println("Server starts successfully!");
}else {
System.out.println("Server fails to start!");
}
});
vertx.deployVerticle(new VertxThriftTest());
}
//将request请求的数据利用thrift定义的操作进行相应的处理（这里参数为二进制，因此需要进行前端请求数据的序列化）
private static String thriftRequest(byte[] input){
try{
//Input
TMemoryBuffer inbuffer = new TMemoryBuffer(input.length);
inbuffer.write(input);
TProtocol inprotocol = new TJSONProtocol(inbuffer);
//Output
TMemoryBuffer outbuffer = new TMemoryBuffer(100);
TProtocol outprotocol = new TJSONProtocol(outbuffer);
TProcessor processor = new Calculator.Processor(new CalculatorHandler());
processor.process(inprotocol, outprotocol);
byte[] output = new byte[outbuffer.length()];
outbuffer.readAll(output, 0, output.length);
return new String(output,"UTF-8");
}catch(Throwable t){
return "Error:"+t.getMessage();
}
}
}5，实现前端
其他js文件都是自动生成的，需要将其他文件拷贝到同一目录下
<html lang="zh-CN">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Thrift Javascript Bindings - Tutorial Exampletitle>
<script src="thrift.js" type="text/javascript">script>
<script src="tutorial_types.js" type="text/javascript">script>
<script src="shared_types.js" type="text/javascript">script>
<script src="SharedService.js" type="text/javascript">script>
<script src="Calculator.js" type="text/javascript">script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js">script>
<script type="text/javascript" charset="utf-8">
//
$(document).ready(function(){
// remove pseudo child required for valid xhtml strict
$("#op").children().remove();
// add operations to it's dropdown menu
$.each(Operation, function(key, value) {
$('#op').append($("").attr("value",value).text(key));
});
$('table.calculator').attr('width', 500);
});
function calc() {
//var transport = new Thrift.Transport("http://127.0.0.1:9090");
//var transport = new Thrift.Transport("http://127.0.0.1:8088/service");
var transport = new Thrift.Transport("http://127.0.0.1:8088/server/thrift/transmit");
var protocol = new Thrift.Protocol(transport);
var client = new CalculatorClient(protocol);
var work = new Work();
work.num1 = $("#num1").val();
work.num2 = $("#num2").val();
work.op = $("#op").val();
try {
console.log("oook");
result = client.calculate(1, work);
console.log(result);
$('#result').val(result);
$('#result').css('color', 'black');
} catch(ouch){
$('#result').val(ouch.why);
$('#result').css('color', 'red');
}
}
function auto_calc() {
if ($('#autoupdate:checked').val() !== undefined) {
calc();
}
}
//]]>
script>
head>
<body>
<h2>Thrift Javascript Bindingsh2>
<form action="">
<table class="calculator">
<tr>
<td>num1td>
<td><input type="text" id="num1" value="20" onkeyup="javascript:auto_calc();"/>td>
tr>
<tr>
<td>Operationtd>
<td><select id="op" size="1" onchange="javascript:auto_calc();"><option>option>select>td>
tr>
<tr>
<td>num2td>
<td><input type="text" id="num2" value="5" onkeyup="javascript:auto_calc();"/>td>tr>
<tr>
<td>resulttd>
<td><input type="text" id="result" value=""/>td>tr>
<tr>
<td><input type="checkbox" id="autoupdate" checked="checked"/>autoupdatetd>
<td><input type="button" id="calculate" value="calculate" onclick="javascript:calc();"/>td>
tr>
table>
form>
<p>This Java Script example uses <a href="https://git-wip-us.apache.org/repos/asf?p=thrift.git;a=blob;f=tutorial/tutorial.thrift;hb=HEAD">tutorial.thrifta> and a Thrift server using JSON protocol and HTTP transport.
p>
<p>
<a href="http://validator.w3.org/check/referer"><img
src="http://www.w3.org/Icons/valid-xhtml10"
alt="Valid XHTML 1.0!" height="31" width="88" />a>
p>
body>
html>本demo的前端代码地址：