使用thrift进行跨语言调用（php c# java）

1：前言

实际上本文说的是跨进程的异构语言调用，举个简单的例子就是利用PHP写的代码去调C#或是java写的服务端。其实除了本文提供的办法还有其他办法，例如http+xml（json）等等都能做到。

本文的意义是介绍thrift，记录我在调试thrift时遇到的问题和相应的解决方案，避免大家走弯路。

2：大概的流程

thrift是通过socket+序列化协议来完成跨语言调用的。类似的方案有protocolbuffer（http://code.google.com/p/protobuf/）这个性能出众，thrift性能我回头再做测试。

使用的流程是

A：定义自己的通信接口，接口可以使用的数据类型有string，int32等，当然你也可以自己定义枚举和结构体

B：使用thrift.exe生成相应的代码

C：调用

3：c#，PHP，Java在调试thrift时遇到的问题

首先我们去下载thrift,地址是http://thrift.apache.org/

解压缩后会看到

lib下就是执行的各种语言的代码。

A：调试PHP注意事项

一定要注册各个php代码也就是这句。

	require_once __DIR__.'/lib/Thrift/ClassLoader/ThriftClassLoader.php';
	$loader = new ThriftClassLoader();
	$loader->registerNamespace('Thrift', __DIR__ . '/lib');
	$loader->register();

B：调试java注意事项

下载没有提供的包

地址是：

http://commons.apache.org/proper/commons-lang/download_lang.cgi

http://hc.apache.org/downloads.cgi

http://www.slf4j.org/

3：demo

定义接口（方法名不能一样）

enum ParameterValueType
{
  AnsiString = 1,
  Byte,
  Boolean,
  Currency = 4,
  Date,
  DateTime,
  Decimal,
  Double,
  Guid,
  Int16,
  Int32,
  Int64,
  String,
  Time,
  Xml
}

enum ParameterValueDirection 
{
   Input,
   Output,
   InputOutput,
   ReturnValue
}

enum AdoCommandType 
{
   Text,
   StoredProcedure
}

struct DBParameter {
  1: string DbParameterName,
  2: ParameterValueType DbType,
  3: string DbParameterValue,
  4: ParameterValueDirection DbDirection,
  5: i32 Size
}

struct ResultMessage {
  1: i32 IsSuccess,
  2: string ErrorMessage,
  3: string ReturnValue,
  4: list<DBParameter> ReturnParameter,
  5: list<string> DataSetColumnName,
  6: list<list<string>> DataSetRowValue
}

service DataAccessComponent {
  ResultMessage ExecuteDataset(1:string ConnectionConfigKey,2:AdoCommandType commandType,3:string commandText,4:list<DBParameter> DBParameter), 
  ResultMessage ExecuteNonQuery(1:string ConnectionConfigKey,2:AdoCommandType commandType,3:string commandText,4:list<DBParameter> DBParameter),
  ResultMessage ExecuteScalar(1:string ConnectionConfigKey,2:AdoCommandType commandType,3:string commandText,4:list<DBParameter> DBParameter),
}

生成代码

thrift -gen java ado.thrift
thrift -gen php ado.thrift
thrift -gen csharp ado.thrift

根据语言把生成的语言放到相应的文件夹下。

下面简单列一下调用代码

1：PHP
	//设置IP，端口建立连接
	$socket = new TSocket('localhost', '9090');
	$transport = new TBufferedTransport($socket);
	
	//选定通信协议
	$protocol = new TBinaryProtocol($transport);
	$client = new DataAccessComponentClient($protocol); //生成的类

2：c#
server
            int port = 9090;
            DataAccess da = new DataAccess();
            // Processor
            DataAccessComponent.Processor pc = new DataAccessComponent.Processor(da);

            // Transport
            TServerSocket tServerSocket =
              new TServerSocket(port);

            // Protocol factory
            TProtocolFactory tProtocolFactory =
              new TBinaryProtocol.Factory();

            TServer serverEngine;

            // Simple Server
            serverEngine = new TSimpleServer(pc, tServerSocket);

            // ThreadPool Server
            //serverEngine = new TThreadPoolServer(pc,tServerSocket);

            // Run it
            serverEngine.Serve();

client
            TTransport transport = new TSocket("localhost", 9090);
            TProtocol protocol = new TBinaryProtocol(transport);
            ThriftTest.Client client = new ThriftTest.Client(protocol);
            transport.Open();
            int val = client.test("1213");
            client.work();
            transport.Close();
            Console.WriteLine(val);
            Console.ReadLine();
3：java
server
		try {
			//private static final Logger LOGGER = LoggerFactory.getLogger(Processor.class.getName());
		    
			//System.setProperty("log4j.configuration", "log4j.properties");
			
			int port = 9090;
		      // Processor
			ThriftServer testHandler =
		        new ThriftServer();
		      ThriftTest.Processor testProcessor =
		        new ThriftTest.Processor(testHandler);

		      // Transport
		      TServerSocket tServerSocket =
		        new TServerSocket(port);

		      // Protocol factory
		      TProtocolFactory tProtocolFactory =
		        new TBinaryProtocol.Factory();

		      TServer serverEngine;

		      // Simple Server
		      //serverEngine = new TSimpleServer(new Args(tServerSocket).processor(testProcessor));

		      // ThreadPool Server
		      serverEngine = new TThreadPoolServer(new TThreadPoolServer.Args(tServerSocket).processor(testProcessor).protocolFactory(tProtocolFactory));

		      //Set server event handler
		      serverEngine.setServerEventHandler(new TestServerEventHandler());

		      // Run it
		      System.out.println("Starting the server on port " + port + "...");
		      serverEngine.serve();
		      
		} catch (Exception x) {

			x.printStackTrace();

		}
		System.out.println("done.");