Java Spring集成TcpOutboundGateway、ServiceActivator、消息通道和错误消息DispatchingException:Dispatcher没有订阅服务器
正如@Gary Russell在本文中提到的,我扩展了TcpOutboundGateway,以便在不发出任何请求的情况下从TCP服务器接收消息 这里是我的定制TCPOUTBOUNDGATHEWAY,如果消息负载包含“freqID”,则它会将消息发送到MessageChannelJava Spring集成TcpOutboundGateway、ServiceActivator、消息通道和错误消息DispatchingException:Dispatcher没有订阅服务器,java,spring,spring-boot,tcp,spring-integration,Java,Spring,Spring Boot,Tcp,Spring Integration,正如@Gary Russell在本文中提到的,我扩展了TcpOutboundGateway,以便在不发出任何请求的情况下从TCP服务器接收消息 这里是我的定制TCPOUTBOUNDGATHEWAY,如果消息负载包含“freqID”,则它会将消息发送到MessageChannel public class ExtendedTcpOutboundGateway extends TcpOutboundGateway { private final DirectChannel unso
public class ExtendedTcpOutboundGateway extends TcpOutboundGateway {
private final DirectChannel unsolicitedMessageChannel;
public ExtendedTcpOutboundGateway(DirectChannel unsolicitedMessageChannel) {
this.unsolicitedMessageChannel = unsolicitedMessageChannel;
}
@Override
public boolean onMessage(Message<?> message) {
if (isUnsolicitedMessage((Message<byte[]>) message)) {
this.messagingTemplate.send(this.unsolicitedMessageChannel, message);
return false;
} else {
return super.onMessage(message);
}
}
private boolean isUnsolicitedMessage(Message<byte[]> message) {
byte[] payloadByte = message.getPayload();
String payloadString = new String(payloadByte);
System.out.println(payloadString);
return payloadString.contains("freqID");
}
}
当我使用这样的组合时,我会有一个例外,比如
org.springframework.messaging.MessageDeliveryException:Dispatcher没有通道“未经请求的MessageChannelName\u测试”的订户
我不明白为什么我要采取这个例外,因为不一样,但类似的用法是工作的罚款从这个
我想我对ServiceActivator的设计或使用方式有问题,我应该怎么做才能清除异常?您有什么建议吗?您喜欢在
createNewSubflow()中这样做。
:
并且,您不会在应用程序上下文中将其注册为bean。因此,这个对象没有与前面提到的@ServiceActivator
绑定,并且在运行时它确实没有任何订户。您甚至不需要创建该对象。你需要的是采取现有的措施
如果您确实希望将消息传递到@ServiceActivator
,则从应用程序上下文中获取该通道的bean
考虑使用
createNewSubflow()
将BeanFactory
注入组件,以调用其getBean(未经请求的MessageChannelName,DirectChannel.class)
使用合适的service activator订户访问real bean。我将尝试应用您的建议并提供反馈,但我记得您是spring integration的参与者之一,因此您能否告诉我组件(MessageChannel、ServiceActivator、TcpOutBoundGateway等)的设计或使用情况你说得对吗?或者,如果你让它更方便,你会有什么建议。我的主要场景就在这里。Hello@ArtemBilan,我刚刚在createNewSubflow()方法中尝试了DirectChannel DirectChannel=getBeanFactory().getBean(未经请求的MessageChannelName,DirectChannel.class),异常消失了。谢谢你的支持。
private MessageChannel createNewSubflow(Message<?> message) {
String host = (String) message.getHeaders().get("host");
Integer port = (Integer) message.getHeaders().get("port");
String unsolicitedMessageChannelName= (String) message.getHeaders().get("unsolicitedMessageChannelName");
Assert.state(host != null && port != null, "host and/or port header missing");
String hostPort = host + port;
TcpNetClientConnectionFactory cf = new TcpNetClientConnectionFactory(host, port);
cf.setLeaveOpen(true);
ByteArrayCrLfSerializer byteArrayCrLfSerializer = new ByteArrayCrLfSerializer();
byteArrayCrLfSerializer.setMaxMessageSize(1048576);
cf.setSerializer(byteArrayCrLfSerializer);
cf.setDeserializer(byteArrayCrLfSerializer);
DirectChannel directChannel = MessageChannels.direct(unsolicitedMessageChannelName).get();
ExtendedTcpOutboundGateway tcpOutboundGateway = new ExtendedTcpOutboundGateway(directChannel);
tcpOutboundGateway.setConnectionFactory(cf);
IntegrationFlow flow = f -> f.handle(tcpOutboundGateway);
IntegrationFlowContext.IntegrationFlowRegistration flowRegistration =
this.flowContext.registration(flow)
.addBean(cf)
.id(hostPort + ".flow")
.register();
MessageChannel inputChannel = flowRegistration.getInputChannel();
this.subFlows.put(hostPort, inputChannel);
return inputChannel;
}
@Service
public class PeriodicalData implements PeriodicalDataService {
public void setPeriodicalDataOrder(some parameters) {
String unsolicitedMessageChannelName="unsolicitedMessageChannelName_Test";
byte[] result = tcpClientGateway.send(data, ip, port ,unsolicitedMessageChannelName);
String response = new String(result);
System.out.println("Here response for request data : " + response +" received");
}
@ServiceActivator(inputChannel = "unsolicitedMessageChannelName_Test")
public void handle(String in) {
System.out.println("Here unsolicitedMessageChannel data : " + in+" received");
}
}
DirectChannel directChannel = MessageChannels.direct(unsolicitedMessageChannelName).get();