我如何使用Mule Java中的相同打开套接字从第二次发送接收数据？

Question

在这个论坛上，大家好，在这种情况下，我需要社区的帮助，因为我不知道如何保持打开套接字来从设备发送和接收数据。 例如，当我发送第一个命令以接收答案时，我成功地收到了答案，但是在尝试发送回第二个命令时，在第一次发送/接收之后，我没有响应，有时会抛出错误。

这是我在Mule 3.5 CE Java 1.7中使用的类

public class TCPMuleOutBasic extends TcpMessageReceiver {


     public TCPMuleOutBasic(Connector connector, FlowConstruct flowConstruct,
             InboundEndpoint endpoint) throws CreateException {
         super(connector, flowConstruct, endpoint);
     }

     protected Work createWork(Socket socket) throws IOException {
         return new MyTcpWorker(socket, this);
     }


     protected class MyTcpWorker extends TcpMessageReceiver.TcpWorker {

         public MyTcpWorker(Socket socket, AbstractMessageReceiver receiver)
                 throws IOException {
             super(socket, receiver);
             // TODO Auto-generated constructor stub
         }

         @Override
         protected Object getNextMessage(Object resource) throws Exception {
             ArrayList<String> testarr2 = new ArrayList<>();
             BufferedReader entrada;
             //Socket clientSocket = null;
             try{
                 ArrayList<String> testarr = new ArrayList<>();

                 //this.socket.
                 //clientSocket = this.socket;

                 //OPEN IN BUFFER, DE ENTRADA
                 entrada = new BufferedReader(new InputStreamReader(this.socket.getInputStream()));
                 //OPEN OUT BUFFER DE SALIDA ENVIA COMANDO 
                 PrintStream pingStream = new PrintStream(this.socket.getOutputStream());

                 //PrintStream pingStream = new DataOutputStream(clientSocket.getOutputStream());

                 System.out.println("STATUS SOCKET VAL 1.2: "+this.socket.isClosed()+" CON "+isConnected());
                 testarr = this.enviarComando("#SER",1,this.socket,entrada,pingStream);
                 System.out.println("ARRAY VALOR 1: " + testarr.get(0));

                 //OPEN A SECOND TIME, THIS IS MY PROBLEM DONT WORK

                 //ABRO BUFFER DE ENTRADA
                 entrada = new BufferedReader(new InputStreamReader(this.socket.getInputStream()));
                 //ABRO BUFFER DE SALIDA ENVIA COMANDO 
                 pingStream = new PrintStream(this.socket.getOutputStream());


                 System.out.println("STATUS SOCKET VAL 2: "+this.socket.isClosed()+" CON "+isConnected());
                 testarr2 = this.enviarComando("#NLO",2,this.socket,entrada,pingStream);
                 /*System.out.println("ARREGLO VALOR 2: " + testarr2.get(0));*/

                 dataIn.close();
                 return testarr;
             }catch(IOException e)
             {
                 System.out.println("ERROR ARREGLO:"+e.getMessage());
                 return null;
             }

         }//FIN NEXTMESSANGE

         //METODO PARA HACER PETICION
         //FUNCTION TO SEND A RECIVE DATA
         protected ArrayList<String> enviarComando (String comando,int req,Socket openSocket,BufferedReader entrada,PrintStream pingStream) throws Exception {
             boolean InitConnection = false;
             String lineaComando;
             String mensajeServidor;
             Socket clientSocket = null;
             ArrayList<String> retorno = new ArrayList<String>();

             try{

                 if (InitConnection == false) {
                     lineaComando = comando;
                     System.out.println("Mandando Comandos:"+lineaComando);
                     clientSocket = openSocket;
                     String direccion = clientSocket.getInetAddress().getHostAddress();
                     System.out.println("Direccion:"+direccion);
                     System.out.println("Cliente en línea ="+req);




                     System.out.println("Comando enviado:" + lineaComando);
                     lineaComando = lineaComando + CRC.getCrc16Ccitt(lineaComando) + "\r";
                     pingStream.print(lineaComando);

                     //entrada = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
                     //entrada.ready();
                     System.out.println("STATUS FLUJO DE ENTRADA ="+req+entrada.ready());


                     int contador = 0;
                     System.out.println("ENTRADA: "+entrada.toString());
                     while((mensajeServidor = entrada.readLine()) != null) //Mientras haya mensajes desde el cliente
                     {    
                         contador++;
                         //Se muestra por pantalla el mensaje recibido
                         retorno.add(mensajeServidor); 
                         System.out.println("mensaje dispositivo "+contador+ ": "+ mensajeServidor);
                     }
                     /*
                     lineaComando = "#NLO";
                     System.out.println("Mandando 2do Comandos:"+lineaComando);
                     lineaComando = lineaComando + CRC.getCrc16Ccitt(lineaComando) + "\r";
                     pingStream.print(lineaComando);
                     while((mensajeServidor = entrada.readLine()) != null) //Mientras haya mensajes desde el cliente
                     {    
                         contador++;
                         //Se muestra por pantalla el mensaje recibido
                         retorno.add(mensajeServidor); 
                         System.out.println("mensaje dispositivo Segundo"+contador+ ": "+ mensajeServidor);
                     }*/


                     InitConnection = true;
                 }

                 //dataIn.close();
                 InitConnection = false;
                 logger.debug("Socket timeout");
                 System.out.println("CIERRO SOCKET");
                 return retorno;
             }catch (SocketException e )
             {
                 System.out.println("ERROR F:"+e.getMessage()+" "+comando+" Request: "+req);
                 return null;
             }
         }
     }
 } 

连接器和流程。

    <tcp:connector name="TCP" doc:name="TCP connector"
     clientSoTimeout="100000" receiveBacklog="0" receiveBufferSize="0"
     sendBufferSize="0" serverSoTimeout="100000" socketSoLinger="0"
     validateConnections="true"  keepSendSocketOpen="true" keepAlive="true">
     <receiver-threading-profile
         maxThreadsActive="5" maxThreadsIdle="5" />
     <reconnect-forever />
     <!--  <service-overrides messageReceiver="TCPMuleOut" />-->
     <service-overrides messageReceiver="ve.com.comware.socket.TCPMuleOutBasic" />
     <tcp:direct-protocol payloadOnly="true" />
 </tcp:connector>
 <flow name="socketcomware0.1Flow1" doc:name="socketcomware0.1Flow1">
         <tcp:inbound-endpoint  host="107.170.3.231" port="2020"  doc:name="TCP" responseTimeout="100000" exchange-pattern="request-response"/>
         <logger message="HOLA1" level="INFO" doc:name="Logger"/>
         <logger message="test  ----------------- #[message.payload[0]]  -------------------#[message.payload[1]]  " level="INFO" doc:name="Logger"/>
 </flow>        

错误：

 org.mule.exception.DefaultSystemExceptionStrategy: Caught exception in Exception Strategy: Index: 0, Size: 0
 java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
     at java.util.ArrayList.rangeCheck(ArrayList.java:635)
     at java.util.ArrayList.get(ArrayList.java:411)
     at ve.com.comware.socket.TCPMuleOutBasic$MyTcpWorker.getNextMessage(TCPMuleOutBasic.java:65)

Answer 1

请尝试此操作，并让我知道，以便我了解您的用例-

   <tcp:connector name="TCP1" validateConnections="true" sendBufferSize="0" receiveBufferSize="0" receiveBacklog="0" clientSoTimeout="10000" serverSoTimeout="10000" socketSoLinger="0" doc:name="TCP">
    <tcp:direct-protocol payloadOnly="false"/>
</tcp:connector>

 <flow name="tcp-testFlow">
        <tcp:inbound-endpoint exchange-pattern="request-response" host="${host}" port="${port}" responseTimeout="10000" connector-ref="TCP1" doc:name="TCP"/>
        <logger message="This is what your client is sending you - #[payload]" level="INFO" doc:name="Logger"/>
        <set-payload value="Hello from server - #[payload]" doc:name="Set Payload"/>
    </flow>