TCP入站端点- Mule ESB -多线程

Question

我有一个TCP入站端点，它引用TCP连接器。这是一个请求响应端点.TCP客户端是一个第三方应用程序，它只在一个套接字上发送请求。我就是这样设置TCP端点的。端点：

<tcp:inbound-endpoint exchange-pattern="request-response"
            responseTimeout="10000" doc:name="TCP" address="${Endpoint}" encoding="ISO-8859-1" connector-ref="TCP"/>

连接器：

<tcp:connector name="TCP" doc:name="TCP connector"
    clientSoTimeout="${Client_SO_Timeout}" receiveBacklog="0" receiveBufferSize="0"
    sendBufferSize="0" serverSoTimeout="${Server_SO_Timeout}" socketSoLinger="0"
    validateConnections="true" keepAlive="true" sendTcpNoDelay="true">
            <receiver-threading-profile maxThreadsActive="${TCP_MaxThreadsActive}" maxThreadsIdle = "${TCP_MaxThreadsIdle}" />
    <reconnect-forever />
    <service-overrides messageReceiver="CustomMessageReceiver" />
    <tcp:custom-protocol ref="CustomLengthProtocol" />
</tcp:connector>

水流运转良好。但是，当必须处理并发请求时，最后几个请求将超时。我从这里了解到，消息正在接收方等待处理(因为只使用一个TCP会话)，直到前面的请求被mule流完成为止。

为了对此进行调优，我正在寻找一种方法来更改mule流，如下所示:在收到来自客户端的请求之后，我需要将它发送到可能异步处理它并将响应推送到同一个套接字的mule流。在端点接收到请求后，不需要等待上一个请求的流在处理下一个请求之前完成。不需要将请求/响应顺序从骡子流中保存下来。是否有一种方法可以通过扩展mule端点功能来实现这一点？这与排队异步流处理策略类似，只是响应必须被发送回原始TCP套接字。

Answer 1

我就是这样解决这个问题的：(i)不是使用tcp请求响应入站端点，而是使用TCP入站(单向)和TCP出站(单向) (ii) TCP入站接收请求，自定义长度协议拆分消息并将其提供给流。(iii)在VM端点(入站和出站) (iv)中使用请求应答作用域(Iv) vm端点将消息定向到一个单独的流，该流的processingStrategy为“排队-异步”。我计划在这个流级别上为线程池设置maxThreads。(v)第二个流执行业务逻辑，并将响应发送回要发送到套接字的主流。(vi)为了从入站端点访问套接字，我在TCPMessageReceiver类中重写了TCPMessageReceiver方法，并向mulemessage添加了一个名为"ClientSocket“的出站属性。然后，我将此属性传播到主流的末尾到出站端点。在TCPOutbound端点上，我创建了自己的TCPMessageDispatcher并扩展了doDispatch方法。我没有使用出站端点线程池中的套接字，而是使用作为mulemessage一部分的共享的套接字对象。样本流：

<tcp:connector name="TCP" doc:name="TCP connector"
    clientSoTimeout="70000" receiveBacklog="0" receiveBufferSize="0"
    sendBufferSize="0" serverSoTimeout="70000" socketSoLinger="0"
    validateConnections="true" keepAlive="true" sendTcpNoDelay="true" keepSendSocketOpen="true">
    <receiver-threading-profile
        maxThreadsActive="1" maxThreadsIdle="1" />
    <reconnect-forever />
    <service-overrides messageReceiver="CustomMessageReceiver" />

    <tcp:custom-protocol ref="CustomLengthProtocol" />
</tcp:connector>

<tcp:connector name="TCP2" doc:name="TCP connector"
    clientSoTimeout="70000" receiveBacklog="0" receiveBufferSize="0"
    sendBufferSize="0" serverSoTimeout="70000" socketSoLinger="0"
    validateConnections="true" keepAlive="true" sendTcpNoDelay="true"
    keepSendSocketOpen="true">
    <receiver-threading-profile
        maxThreadsActive="1" maxThreadsIdle="1" />
    <reconnect-forever />
    <service-overrides dispatcherFactory="CustomMessageDispatcherFactory"/>
    <tcp:custom-protocol ref="CustomLengthProtocol" />

</tcp:connector>


<spring:beans>
    <spring:bean id="CustomLengthProtocol" name="CustomLengthProtocol"
        class="CustomLengthProtocol" />
</spring:beans>
<flow name="tcptestFlow" doc:name="tcptestFlow">
    <tcp:inbound-endpoint address="tcp://localhost:4444" 
        responseTimeout="100000"  doc:name="TCP" connector-ref="TCP" />
    <byte-array-to-string-transformer
        doc:name="Byte Array to String" />
    <logger level="INFO" category="Expression" doc:name="Logger" />

    <set-session-variable variableName="Socket"
        value="#[message.outboundProperties['ClientSocket']]"
        doc:name="Session Variable" />
    <logger message="#[payload] - #[Socket]" level="INFO" category="Request"
        doc:name="Logger" />

    <request-reply doc:name="Request-Reply">
        <vm:outbound-endpoint exchange-pattern="one-way"
            path="/qin" doc:name="VM" >
            <message-properties-transformer scope="outbound"> 
                <delete-message-property key="MULE_REPLYTO"></delete-message-property>  
            </message-properties-transformer> 
          </vm:outbound-endpoint>
        <vm:inbound-endpoint exchange-pattern="one-way"
            path="/qout" doc:name="VM" />
    </request-reply>
    <logger message="#[payload]" level="INFO" doc:name="Logger"
        category="Response" />
    <string-to-byte-array-transformer
        doc:name="String to Byte Array" />
    <tcp:outbound-endpoint address="tcp://localhost:4444" 
        responseTimeout="10000" doc:name="TCP" connector-ref="TCP2" />

</flow>
<flow name="tcptestFlow1" processingStrategy="queued-asynchronous"
    doc:name="tcptestFlow1">

    <vm:inbound-endpoint exchange-pattern="one-way"
        path="/qin" doc:name="VM" />
    <logger message="Inside VM Flow" level="INFO" doc:name="Logger" />
    <set-payload value="Appended Response - #[payload]"
        doc:name="Set Payload" />
    <vm:outbound-endpoint exchange-pattern="one-way"
        path="/qout" doc:name="VM" />

</flow>