我正在尝试为消息创建Flow，如下所示：
TCPinboundAdapter ----＆gt;消息Brocker（ActiveMQ）
流量：
此流程按以下方式创建
代码如下：
@EventListener
public void handleTcpConnectionClientEvent(TcpConnectionFailedEvent event){
TcpNioClientConnectionFactory tcp = (TcpNioClientConnectionFactory)event.getSource();
System.out.println(tcp);
System.out.println("connection exception client :::"+event.getSource());
this.status = event.toString();
}
@EventListener
public void handleTcpConnectionServerExceptionEvent(TcpConnectionServerExceptionEvent event){
System.out.println("connection exception server :::");
this.status = event.toString();
}
// this method is invoked when the connection with the sever got disconnected
@EventListener
public void handleTcpConnectionServerEvent(TcpConnectionExceptionEvent event){
System.out.println("connection exception serversssss :::"+event.getConnectionFactoryName());
this.status = event.toString();
}
//when the connection got established (not for first time)
@EventListener
public void handleTcpConnectionCloseEvent(TcpConnectionOpenEvent event){
System.out.println("connection opened :::"+event.getConnectionFactoryName());
// status = event.toString();
}
// create a server connection and flow to JMS
private void createServerConnection(HostConnection hostConnection) throws Throwable{
this.status = "success";
// IntegrationFlow flow;
IntegrationFlowRegistration theFlow;
IntegrationFlow flow =
IntegrationFlows.from(Tcp.inboundAdapter(Tcp.netServer(1234)
.serializer(customSerializer)
.deserializer(customSerializer)
.id(hostConnection.getConnectionNumber()).soTimeout(10000)))
.enrichHeaders(f->f.header("abc","abc")))
.channel(directChannel())
.handle(Jms.outboundAdapter(ConnectionFactory())
.destination("jmsInbound"))
.get();
theFlow = this.flowContext.registration(flow).id("test.flow").register();
if(this.status.equals("success"))
createInboundFlow(hostConnection);
// startConnection(hostConnection.getConnectionNumber());
}
问题：
此流程已成功创建，并在没有异常时注册到应用程序上下文。 但万一有异常，即（BindException）
在为特定端口创建服务器时，已使用该端口 然后它引发了BindException，然后流程也被注册了 因此，我们希望在以下任何流程组件中存在异常时不应注册流程。
IntegrationFlowRegistration theFlow;
IntegrationFlow flow =
IntegrationFlows.from(Tcp.inboundAdapter(Tcp.netServer(1234)
.serializer(customSerializer)
.deserializer(customSerializer)
.id("server").soTimeout(10000)))
.enrichHeaders(f->f.header("abc","abc")))
.channel(directChannel())
.handle(Jms.outboundAdapter(ConnectionFactory())
.destination("jmsInbound"))
.get();
theFlow =this.flowContext.registration(flow).id("test.flow").register();
有各种监听器实现在TCP连接中检查异常try {} catch（）块不会引发任何异常。
请提供一种合适的方法来处理当前正在使用各种事件的监听器的适配器的异常，以了解tcp适配器是否有问题。
采用Artem Bilan先生提供的这种方法后
@EventListener
public void handleTcpConnectionServerExceptionEvent(TcpConnectionServerExceptionEvent event){
System.out.println("connection exception server :::"+event);
this.status = event.getCause().getMessage();
AbstractConnectionFactory server = (AbstractConnectionFactory)event.getSource();
System.out.println(server.getComponentName());
this.flowContext.remove(server.getComponentName()+"out.flow");
}
我可以使用FlowId删除流但我无法捕获异常 下面的例外是在控制台上打印，无法处理即使我已将方法更改为
private void createServerConnection(HostConnection hostConnection) throws Throwable{}
并在调用函数
中使用try {} catch（Throwable t）{}处理这些异常 Exception in thread "pool-4-thread-1" java.lang.NullPointerException
在下面提供的日志中以更详细的形式描述了异常：
2018-05-17 21:01:40.850 INFO 18332 --- [nio-8080-exec-4]
.s.i.i.t.c.TcpNetServerConnectionFactory : started Co123, port=1234
2018-05-17 21:01:40.850 INFO 18332 --- [nio-8080-exec-4] o.s.i.ip.tcp.TcpReceivingChannelAdapter : started org.springframework.integration.ip.tcp.TcpReceivingChannelAdapter#3
2018-05-17 21:01:40.851 ERROR 18332 --- [pool-5-thread-1] .s.i.i.t.c.TcpNetServerConnectionFactory : Error on ServerSocket; port = 1234
java.net.BindException: Address already in use: JVM_Bind
at java.net.DualStackPlainSocketImpl.bind0(Native Method) ~[na:1.8.0_111]
at java.net.DualStackPlainSocketImpl.socketBind(Unknown Source) ~[na:1.8.0_111]
at java.net.AbstractPlainSocketImpl.bind(Unknown Source) ~[na:1.8.0_111]
at java.net.PlainSocketImpl.bind(Unknown Source) ~[na:1.8.0_111]
at java.net.ServerSocket.bind(Unknown Source) ~[na:1.8.0_111]
at java.net.ServerSocket.<init>(Unknown Source) ~[na:1.8.0_111]
at java.net.ServerSocket.<init>(Unknown Source) ~[na:1.8.0_111]
at javax.net.DefaultServerSocketFactory.createServerSocket(Unknown Source) ~[na:1.8.0_111]
at org.springframework.integration.ip.tcp.connection.TcpNetServerConnectionFactory.createServerSocket(TcpNetServerConnectionFactory.java:211) ~[spring-integration-ip-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.integration.ip.tcp.connection.TcpNetServerConnectionFactory.run(TcpNetServerConnectionFactory.java:106) ~[spring-integration-ip-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_111]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_111]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_111]
connection exception server :::TcpConnectionServerExceptionEvent [source=Co123, port=1234, cause=java.net.BindException: Address already in use: JVM_Bind]
Co123
2018-05-17 21:01:40.851 INFO 18332 --- [pool-5-thread-1] o.s.i.ip.tcp.TcpReceivingChannelAdapter : stopped org.springframework.integration.ip.tcp.TcpReceivingChannelAdapter#3
2018-05-17 21:01:40.851 INFO 18332 --- [pool-5-thread-1] o.s.i.endpoint.EventDrivenConsumer : Removing {transformer} as a subscriber to the 'Co123out.flow.channel#0' channel
2018-05-17 21:01:40.852 INFO 18332 --- [pool-5-thread-1] o.s.integration.channel.DirectChannel : Channel 'application.Co123out.flow.channel#0' has 0 subscriber(s).
2018-05-17 21:01:40.852 INFO 18332 --- [pool-5-thread-1] o.s.i.endpoint.EventDrivenConsumer : stopped org.springframework.integration.config.ConsumerEndpointFactoryBean#11
2018-05-17 21:01:40.852 INFO 18332 --- [pool-5-thread-1] o.s.i.endpoint.EventDrivenConsumer : Removing {jms:outbound-channel-adapter} as a subscriber to the 'Co123out.flow.channel#1' channel
2018-05-17 21:01:40.852 INFO 18332 --- [pool-5-thread-1] o.s.integration.channel.DirectChannel : Channel 'application.Co123out.flow.channel#1' has 0 subscriber(s).
2018-05-17 21:01:40.852 INFO 18332 --- [pool-5-thread-1] o.s.i.endpoint.EventDrivenConsumer : stopped org.springframework.integration.config.ConsumerEndpointFactoryBean#12
Exception in thread "pool-4-thread-1" java.lang.NullPointerException
at org.springframework.integration.ip.tcp.connection.TcpNetServerConnectionFactory.run(TcpNetServerConnectionFactory.java:185)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception in thread "pool-5-thread-1" java.lang.NullPointerException
at org.springframework.integration.ip.tcp.connection.TcpNetServerConnectionFactory.run(TcpNetServerConnectionFactory.java:185)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)`
答案 0 :(得分：0)
您通过以下方式注册console.log("Does not exist");：
IntegrationFlow相同的this.flowContext.registration(flow).id("test.flow").register();
bean和流的id可用于破坏来自任何其他地方的流，例如当你抓到上面提到的his.flowContext：
BindException