go thrift 开发

thrift 从 0.9.1版本开始，可以完美支持 go 语言，可以完美的实现跨语言的 rpc 调用了。下面以 go 和 java 语言相互调用为例。

• 编辑协议文件，go 语言示例

/** example.thrift */
namespace go example

service transdata {
    bool sendMsg(1: string msgJson),
}

•  下载thrift，用于生成协议库文件

下载地址 http://www.apache.org/dyn/closer.cgi?path=/thrift/0.11.0/thrift-0.11.0.exe

生成库文件 thrift.0.11.0.exe -r --gen go example.thrift

• go 语言客户端和服务端示例代码

/** thrift_example.go */
package thrift
import (
    "fmt"
    "git.apache.org/thrift.git/lib/go/thrift"
    "os"
    "context"
    "log"
    "net"
    "awesome-go/src/service/thrift/gen-go/example"
)
const (
    HOST = "localhost"
    PORT = "19090"
)

type TransdataImpl struct {
}

func (trandata *TransdataImpl) SendMsg(ctx context.Context, msgJson string) (r bool, err error){
    fmt.Println("-->SendMsg Call:", msgJson)
    return true, nil
}

func Server() {
    transportFactory := thrift.NewTFramedTransportFactory(thrift.NewTTransportFactory())
    protocolFactory := thrift.NewTBinaryProtocolFactoryDefault()
    //protocolFactory := thrift.NewTCompactProtocolFactory()

    serverTransport, err := thrift.NewTServerSocket(net.JoinHostPort(HOST, PORT))
    if err != nil {
        fmt.Println("Error!", err)
        os.Exit(1)
    }

    handler := &TransdataImpl{}
    processor := example.NewTransdataProcessor(handler)

    server := thrift.NewTSimpleServer4(processor, serverTransport, transportFactory, protocolFactory)
    fmt.Println("thrift server in", net.JoinHostPort(HOST, PORT))
    server.Serve()
}

func Client() {
    tSocket, err := thrift.NewTSocket(net.JoinHostPort(HOST, PORT))
    if err != nil {
        log.Fatalln("tSocket error:", err)
    }
    transportFactory := thrift.NewTFramedTransportFactory(thrift.NewTTransportFactory())
    transport, _ := transportFactory.GetTransport(tSocket)
    protocolFactory := thrift.NewTBinaryProtocolFactoryDefault()

    client := example.NewTransdataClientFactory(transport, protocolFactory)

    if err := transport.Open(); err != nil {
        log.Fatalln("Error opening:", HOST + ":" + PORT)
    }
    defer transport.Close()

    d, err := client.SendMsg(nil,"test string")
    fmt.Println(d)
}

• go 语言测试代码

/** thrift_example_test.go */
package thrift

import "testing"

func ClientTest(t *testing.T) {
    Client()
}

func ServerTest(t testing.T) {
    Server()
}

• java 协议文件示例

namespace go service.thrift

service Transdata {
    bool sendMsg(1: string msgJson),
}

• 生成java 协议库文件

生成库文件 thrift.0.11.0.exe -r --gen java example.thrift

• java 服务端示例

package service.thrift;

import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.protocol.TBinaryProtocol.Factory;
import org.apache.thrift.server.TNonblockingServer;
import org.apache.thrift.server.TServer;
import org.apache.thrift.transport.TNonblockingServerSocket;
import org.apache.thrift.transport.TNonblockingServerTransport;
import org.apache.thrift.transport.TTransportException;

/**
 * @author zhengqian
 */
public class Server {

    public static void StartSimpleServer(Transdata.Processor<ExampleHandler> processor) {
        TNonblockingServerTransport serverTransport = null;
        try {
            serverTransport = new TNonblockingServerSocket(19090);
        } catch (TTransportException e) {
            e.printStackTrace();
        }

        Factory protFactory = new TBinaryProtocol.Factory(true, true);
        //TCompactProtocol.Factory protFactory = new TCompactProtocol.Factory();

        TNonblockingServer.Args args = new TNonblockingServer.Args(
                serverTransport);
        args.processor(processor);
        args.protocolFactory(protFactory);
        TServer server = new TNonblockingServer(args);
        System.out.println("Start server on port 19090 ...");
        server.serve();
    }

    public static void main(String[] args) {
        StartSimpleServer(new Transdata.Processor<ExampleHandler>(new ExampleHandler()));
    }
}

• java 客户端代码示例

package service.thrift;

import org.apache.thrift.TException;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TFramedTransport;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransport;
import org.apache.thrift.transport.TTransportException;

/**
 * @author zhengqian
 */
public class Client {
    public static void main(String[] args) {

        try {
            TTransport transport = new TFramedTransport(new TSocket("localhost", 19090));
            TProtocol protocol = new TBinaryProtocol(transport);
            Transdata.Client client = new Transdata.Client(protocol);

            transport.open();
            System.out.println(client.sendMsg("test string"));
            transport.close();
        } catch (TTransportException e) {
            e.printStackTrace();
        } catch (TException x) {
            x.printStackTrace();
        }
    }
}

• 两个语言版本的 server / client 随意组合，都可以相互调用。
• 补充，如果两端使用的 thrift 版本不一致，也可以调用，测试一端使用 0.9.3 版本，一端使用 0.11.0 版本，可正常相互调用。不用担心旧服务不兼容的问题。