RocketMQ Windows下VC客戶端之Bridge試驗

Windows平臺客戶端調用，有些麻煩，特別是一般個人用戶。反正鵝是找了好久Windows下C#的免費客戶端，找到那個OpenJDK編譯的dll，還不好用。

於是設想，使用JNI寫一個java的MqBridge，java類中有3個方法

public class test.MqBridge {
  org.apache.rocketmq.client.producer.DefaultMQProducer producer;
    descriptor: Lorg/apache/rocketmq/client/producer/DefaultMQProducer;

  public test.MqBridge();
    descriptor: ()V

  //帶NAMESRV_ADDR
  public void start(java.lang.String) throws org.apache.rocketmq.client.exception.MQClientException, java.lang.InterruptedException;
    descriptor: (Ljava/lang/String;)V
  
  //使用環境變量的NAMESRV_ADDR
  public void start() throws org.apache.rocketmq.client.exception.MQClientException, java.lang.InterruptedException;
    descriptor: ()V

  public void stop();
    descriptor: ()V
  
  //發送，第1參數是topic，第2個參數是消息內容
  public int send(java.lang.String, java.lang.String);
    descriptor: (Ljava/lang/String;Ljava/lang/String;)I
}

經過使用VC調用測試，發送正常

RocketMQLog:WARN No appenders could be found for logger (io.netty.util.internal.PlatformDependent0).
RocketMQLog:WARN Please initialize the logger system properly.
Call java start()
SendResult [sendStatus=SEND_OK, msgId=7F0000010EA000387F443B6B330C0000, offsetMsgId=C0A8008200002AA70000000000
0B1772, messageQueue=MessageQueue [topic=device_data, brokerName=broker-a, queueId=3], queueOffset=426]
Call java send()
Call java stop()

調用過程代碼
    jclass clsBridge = env->FindClass("test/MqBridge");//類
    if(NULL==clsBridge){
        cout<<"Can't find/load the MqBridge class ";printErrMsg(GetLastError());cout<<endl;
        return false;
    }
    jobject objBridge = env->AllocObject(clsBridge);//實例
    if(NULL==objBridge){
        cout<<"Create instance of MqBridge class failed"<<endl;
        return false;
    }
    
    //調用start方法
    char addr[]="192.168.0.130:9876";
    jstring addrJ=env->NewStringUTF(addr);
    jmethodID midStart = env->GetMethodID(clsBridge, "start", "(Ljava/lang/String;)V");
    env->CallVoidMethod(objBridge, midStart, addrJ);
    cout<<"Call java start()"<<endl;
    
    //發送消息，可以反覆調用send
    char topic[]="device_data";
    char msg[]="test rockmq";
    jstring topicJ=env->NewStringUTF(topic);
    jstring msgJ  =env->NewStringUTF(msg);
    jmethodID midSend = env->GetMethodID(clsBridge, "send", "(Ljava/lang/String;Ljava/lang/String;)I");
    env->CallObjectMethod(objBridge, midSend, topicJ, msgJ);
    cout<<"Call java send()"<<endl;
    
    //結束，關停
    jmethodID midStop = env->GetMethodID(clsBridge, "stop", "()V");
    env->CallVoidMethod(objBridge, midStop);
    cout<<"Call java stop()"<<endl;
    

測試環境 1(32位編譯)：
JDK1.8(32位) + VC2008+Windows7 X64

測試環境 2(64位編譯)：
JDK1.8(64位) + VC2019+Windows7 X64

測試環境 3(32位編譯)：
JDK1.8(32位) + VC2019+Windows7 X64

 

關鍵的classpath
classPath=-Djava.class.path=D:/vc_java/bin;C:/jdk1.8.0_311_x86/lib;D:/rocketmq-all-4.8.0-bin-release/lib/rocketmq-client-4.8.0.jar;D:/rocketmq-all-4.8.0-bin-release/lib/rocketmq-common-4.8.0.jar;D:/rocketmq-all-4.8.0-bin-release/lib/rocketmq-remoting-4.8.0.jar;D:/rocketmq-all-4.8.0-bin-release/lib/rocketmq-logging-4.8.0.jar;D:/rocketmq-all-4.8.0-bin-release/lib/netty-all-4.0.42.Final.jar;D:/rocketmq-all-4.8.0-bin-release/lib/commons-lang3-3.4.jar;D:/rocketmq-all-4.8.0-bin-release/lib/fastjson-1.2.69.jar;D:/rocketmq-all-4.8.0-bin-release/lib/commons-validator-1.6.jar

一般的性能要求是可以應付的，對於性能要求不是極致的話，可以這樣考慮。也可以編譯成.dll，供其它語言使用。