我正在尝试使用Spring Integration dsl将以下spring集成项目转换为java配置版本。我没有太多运气，我无法在dsl上找到有助于我理解框架的文档，足以让我们了解这一点。
这是我转换的项目。它使用xml配置。 https://github.com/dsyer/http-amqp-tunnel
基本上它需要一个http请求然后通过rabbitmq将其隧道传送到另一侧的目标应用程序。可以在上面的链接中找到项目应该做的很好的描述。
我的app与我上面列出的github上的主要区别在于我的是基于spring boot 1.5.1.RELEASE，原版是1.1.4.BUILD-SNAPSHOT。此外，原始项目使用spring集成xml命名空间支持，即int-http：inbound-gateway，int-http：outbound-gateway，int-amqp：outbound-gateway和int-amqp：inbound-gateway，而我是＆m;在java配置中使用IntegrationFlow dsl。
我的代码甚至从未在RabbitMQ上发送消息，我在浏览器中遇到超时异常，所以我认为我的IntegrationFlow设置不正确。我添加了一个记录请求的电话水龙头，当我从浏览器点击应用程序时，我只看到一个电话线的输出。
非常感谢正确方向的推动。
更新了配置和错误
package org.springframework.platform.proxy;
import org.springframework.amqp.core.*;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.beans.factory.annotation.*;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.*;
import org.springframework.integration.config.EnableIntegration;
import org.springframework.integration.dsl.*;
import org.springframework.integration.dsl.amqp.Amqp;
import org.springframework.integration.dsl.http.Http;
import org.springframework.integration.handler.LoggingHandler;
import org.springframework.messaging.MessageHandler;
import org.springframework.web.client.RestTemplate;
@Configuration
@ComponentScan
@EnableAutoConfiguration
@EnableIntegration
public class TunnelApplication
{
public static void main(String[] args)
{
SpringApplication.run(TunnelApplication.class, args);
}
@Value("${urlExpression}")
private String urlExpression;
@Value("${targetUrl}")
private String targetUrl;
@Value("${outboundQueue}")
private String outboundQueue;
@Value("${inboundQueue}")
private String inboundQueue;
@Autowired
private ConnectionFactory rabbitConnectionFactory;
@Bean
public Queue requestQueue()
{
return new Queue(outboundQueue, true, false, true);
}
@Bean
public Queue targetQueue()
{
return new Queue(inboundQueue, true, false, true);
}
@Bean
public RestTemplate safeRestTemplate()
{
return new RestTemplate();
}
@Bean
public Jackson2JsonMessageConverter jsonMessageConverter()
{
return new Jackson2JsonMessageConverter();
}
@Bean
public AmqpTemplate amqpTemplate()
{
RabbitTemplate result = new RabbitTemplate(rabbitConnectionFactory);
result.setMessageConverter(jsonMessageConverter());
return result;
}
@Bean
public IntegrationFlow httpInboundGateway()
{
return IntegrationFlows
.from(Http.inboundGateway("/tunnel"))
.handle(
Amqp.outboundAdapter(amqpTemplate())
.mappedRequestHeaders("http_*")
.routingKey(outboundQueue)
// .routingKeyExpression("headers['routingKey']")
)
.wireTap(f->f.handle(logger("outbound")))
.get();
}
@Bean
public IntegrationFlow amqpInboundGateway(ConnectionFactory connectionFactory)
{
return IntegrationFlows.from
(
Amqp.inboundGateway(connectionFactory, inboundQueue)
.mappedRequestHeaders("http_*")
.messageConverter(jsonMessageConverter())
)
.handle(Http.outboundGateway(targetUrl))
.wireTap(f->f.handle(logger("inbound")))
.get();
}
@Bean
public MessageHandler logger(String name)
{
LoggingHandler loggingHandler = new LoggingHandler(LoggingHandler.Level.INFO.name());
loggingHandler.setLoggerName(name);
return loggingHandler;
}
}
以下错误消息继续打印，并且在应用程序运行时有一条消息留在RabbitMQ上。看起来它正在将其拉下并出现错误然后重新打开。这让我很担心，因为我希望任何错误传播回原始客户端，而不是让服务器陷入困境。
2017-02-06 16:00:12.167 INFO 10264 --- [nio-9000-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2017-02-06 16:00:12.167 INFO 10264 --- [nio-9000-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2017-02-06 16:00:12.190 INFO 10264 --- [nio-9000-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 23 ms
2017-02-06 16:00:16.806 INFO 10264 --- [erContainer#0-1] outbound : <200 OK,{X-Application-Context=[application], Content-Type=[text/html;charset=UTF-8], Content-Length=[14], Date=[Mon, 06 Feb 2017 22:00:16 GMT]}>
2017-02-06 16:00:16.810 WARN 10264 --- [erContainer#0-1] s.a.r.l.ConditionalRejectingErrorHandler : Execution of Rabbit message listener failed.
org.springframework.amqp.rabbit.listener.exception.ListenerExecutionFailedException: Listener threw exception
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.wrapToListenerExecutionFailedExceptionIfNeeded(AbstractMessageListenerContainer.java:872) ~[spring-rabbit-1.7.0.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:782) ~[spring-rabbit-1.7.0.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:702) ~[spring-rabbit-1.7.0.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$001(SimpleMessageListenerContainer.java:95) [spring-rabbit-1.7.0.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$1.invokeListener(SimpleMessageListenerContainer.java:186) ~[spring-rabbit-1.7.0.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:1227) [spring-rabbit-1.7.0.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:683) ~[spring-rabbit-1.7.0.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:1181) [spring-rabbit-1.7.0.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:1165) [spring-rabbit-1.7.0.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$1500(SimpleMessageListenerContainer.java:95) [spring-rabbit-1.7.0.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1367) [spring-rabbit-1.7.0.RELEASE.jar:na]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_66]
Caused by: org.springframework.messaging.MessageDeliveryException: Dispatcher has no subscribers for channel 'application:test:9000.amqpInboundGateway.channel#1'.; nested exception is org.springframework.integration.MessageDispatchingException: Dispatcher has no subscribers, failedMessage=GenericMessage [payload=<200 OK,{X-Application-Context=[application], Content-Type=[text/html;charset=UTF-8], Content-Length=[14], Date=[Mon, 06 Feb 2017 22:00:16 GMT]}>, headers={http_requestMethod=GET, replyChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@2eb9b1c6, errorChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@2eb9b1c6, amqp_consumerQueue=request, http_requestUrl=http://localhost:9000/tunnel/, id=bcb94ed9-45fc-c333-afee-de6e20a9f1b5, Content-Length=14, amqp_consumerTag=amq.ctag-ncEDSKdgWNKQk-jhGfqsbw, contentType=text/html;charset=UTF-8, http_statusCode=200, Date=1486418416000, timestamp=1486418416805}]
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:93) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:423) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:373) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115) ~[spring-messaging-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45) ~[spring-messaging-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105) ~[spring-messaging-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:292) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:212) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:129) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:115) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:148) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:121) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:89) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:423) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115) ~[spring-messaging-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSendAndReceive(GenericMessagingTemplate.java:150) ~[spring-messaging-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSendAndReceive(GenericMessagingTemplate.java:45) ~[spring-messaging-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.messaging.core.AbstractMessagingTemplate.sendAndReceive(AbstractMessagingTemplate.java:42) ~[spring-messaging-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.integration.core.MessagingTemplate.sendAndReceive(MessagingTemplate.java:97) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.gateway.MessagingGatewaySupport.doSendAndReceive(MessagingGatewaySupport.java:441) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.gateway.MessagingGatewaySupport.sendAndReceiveMessage(MessagingGatewaySupport.java:409) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.amqp.inbound.AmqpInboundGateway.access$400(AmqpInboundGateway.java:52) ~[spring-integration-amqp-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.amqp.inbound.AmqpInboundGateway$1.onMessage(AmqpInboundGateway.java:154) ~[spring-integration-amqp-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:779) ~[spring-rabbit-1.7.0.RELEASE.jar:na]
... 10 common frames omitted
Caused by: org.springframework.integration.MessageDispatchingException: Dispatcher has no subscribers
at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:154) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:121) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:89) ~[spring-integration-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
... 35 common frames omitted
根据Gary的评论配置 修改为命中弹簧启动执行器的/ beans端点。
@Bean
public IntegrationFlow webToRabbit(RabbitTemplate amqpTemplate) {
return IntegrationFlows.from(Http.inboundGateway("/tunnel"))
.log()
.handle(Amqp.outboundGateway(amqpTemplate).routingKey(queue().getName()))
.log()
.bridge(null)
.get();
}
@Bean
public Queue queue() {
return new AnonymousQueue();
}
@Bean
public IntegrationFlow rabbitToWeb(ConnectionFactory connectionFactory) {
return IntegrationFlows.from(Amqp.inboundGateway(connectionFactory, queue()))
.log()
.handle(Http.outboundGateway("http://localhost:8080/beans")
.expectedResponseType(String.class))
.log()
.bridge(null)
.get();
}
@Bean
public IntegrationFlow finalWeb() {
return IntegrationFlows.from(Http.inboundGateway("/beans"))
.log()
.<String, String>transform(String::toUpperCase)
.log()
.bridge(null)
.get();
}
答案 0 :(得分：1)
对于请求/回复互动，您必须使用Amqp.outboundGateway。这就是戴夫的样本：
<int-amqp:outbound-gateway request-channel="outbound"
routing-key="${outboundQueue}" mapped-request-headers="http_*" />
另外，看，你错过了routingKey，根据Dave的逻辑必须是outboundQueue。
Http.inboundGateway和Amqp.outboundGateway可以合并为一个IntegrationFlow：
@Bean
public IntegrationFlow clientGateway() {
return IntegrationFlows
.from(Http.inboundGateway("/tunnel"))
.handle(Amqp.outboundGateway(amqpTemplate)
.mappedRequestHeaders("http_*")
.routingKey(outboundQueue))
.get();
}
服务器部分也可以合并为一个IntegrationFlow。
它的组件对我来说很好。
您真的希望来自其他服务的回复，因此，您的所有下游组件都必须是请求/回复。
让我们再看一次设计吧！
------------- HTTP ------------- AMQP ------------- AMQP ------------- HTTP --------------
| local app | <------> | client | <------> | broker | <------> | server | <------> | target app |
------------- ------------- ------------- ------------- --------------
答案 1 :(得分：0)
@SpringBootApplication
public class So42077149Application {
public static void main(String[] args) {
SpringApplication.run(So42077149Application.class, args);
}
@Bean
public IntegrationFlow webToRabbit(RabbitTemplate amqpTemplate) {
return IntegrationFlows.from(Http.inboundGateway("/foo"))
.log()
.handle(Amqp.outboundGateway(amqpTemplate).routingKey(queue().getName()))
.log()
.bridge(null)
.get();
}
@Bean
public Queue queue() {
return new AnonymousQueue();
}
@Bean
public IntegrationFlow rabbitToWeb(ConnectionFactory connectionFactory) {
return IntegrationFlows.from(Amqp.inboundGateway(connectionFactory, queue()))
.log()
.handle(Http.outboundGateway("http://localhost:8080/bar")
.expectedResponseType(String.class))
.log()
.bridge(null)
.get();
}
@Bean
public IntegrationFlow finalWeb() {
return IntegrationFlows.from(Http.inboundGateway("/bar"))
.log()
.<String, String>transform(String::toUpperCase)
.log()
.bridge(null)
.get();
}
}
结果：
$ curl -H "Content-Type: text/plain" -d foo localhost:8080/foo
FOO
修改
使用JSON ......
otApplication 公共类So42077149Application {
public static void main(String[] args) {
SpringApplication.run(So42077149Application.class, args);
}
@Bean
public IntegrationFlow webToRabbit(RabbitTemplate amqpTemplate) {
return IntegrationFlows.from(Http.inboundGateway("/foo"))
.log()
.handle(Amqp.outboundGateway(amqpTemplate)
.routingKey(queue().getName())
.mappedRequestHeaders("*")
.mappedReplyHeaders("*"))
.log()
.bridge(null)
.get();
}
@Bean
public Queue queue() {
return new AnonymousQueue();
}
@Bean
public IntegrationFlow rabbitToWeb(ConnectionFactory connectionFactory) {
return IntegrationFlows.from(Amqp.inboundGateway(connectionFactory, queue()))
.log()
.handle(Http.outboundGateway("http://localhost:8080/bar")
.mappedRequestHeaders("*")
.mappedResponseHeaders("*")
.httpMethod(HttpMethod.GET)
.expectedResponseType(Map.class))
.log()
.log(Level.INFO, "payloadClass", "payload.getClass()")
.bridge(null)
.get();
}
@Bean
public IntegrationFlow finalWeb() {
return IntegrationFlows.from(Http.inboundGateway("/bar"))
.log()
.transform("{ \"foo\" : \"bar\" }")
.enrichHeaders(h -> h.header("contentType", "application/json"))
.log()
.bridge(null)
.get();
}
}