Question

我尝试连接两个队列通道（由JDBC Store支持）。

@Configuration
public class DemoIntegration {
    @Bean
    public IntegrationFlow flow(MessageChannel firstJDBCChannel,
                                MessageChannel secondJDBCChannel) {
        return IntegrationFlows.from(firstJDBCChannel)
                .bridge(bridgeHandler -> bridgeHandler.poller(p -> p.fixedDelay(100L)))
                .handle(secondJDBCChannel)
                .get();
    }
}

我试图在这两个频道之间加入不同的结构，但仍然有一个错误：

引起：java.lang.IllegalArgumentException：发现含糊不清方法匹配的参数类型[类java.lang.Void]：[public 布尔 org.springframework.integration.channel.AbstractPollableChannel.removeInterceptor（org.springframework.messaging.support.ChannelInterceptor）， public org.springframework.messaging.Message org.springframework.integration.channel.AbstractPollableChannel.receive（长），公众最终无效 org.springframework.integration.context.IntegrationObjectSupport.setPrimaryExpression（org.springframework.expression.Expression），公共无效 org.springframework.integration.channel.AbstractMessageChannel.setStatsEnabled（布尔值），公共无效 org.springframework.integration.channel.AbstractMessageChannel.setMessageConverter（org.springframework.messaging.converter.MessageConverter），公共无效 org.springframework.integration.channel.AbstractMessageChannel.setDatatypes（java.lang.Class中...）公共无效 org.springframework.integration.channel.AbstractMessageChannel.configureMetrics（org.springframework.integration.support.management.AbstractMessageChannelMetrics），公共无效 org.springframework.integration.context.IntegrationObjectSupport.setComponentName（java.lang.String中）， public org.springframework.messaging.support.ChannelInterceptor org.springframework.integration.channel.AbstractPollableChannel.removeInterceptor（INT），公共无效 org.springframework.integration.context.IntegrationObjectSupport.setMessageBuilderFactory（org.springframework.integration.support.MessageBuilderFactory）， public java.util.List＆gt; org.springframework.integration.channel.QueueChannel.purge（org.springframework.integration.core.MessageSelector），公共无效 org.springframework.integration.context.IntegrationObjectSupport.setApplicationContext（org.springframework.context.ApplicationContext）抛出org.springframework.beans.BeansException，public void org.springframework.integration.context.IntegrationObjectSupport.setBeanFactory（org.springframework.beans.factory.BeanFactory）， public org.springframework.expression.Expression org.springframework.integration.context.IntegrationObjectSupport.getExpression（）公共无效 org.springframework.integration.channel.AbstractPollableChannel.setInterceptors（java.util.List中），公共无效 org.springframework.integration.context.IntegrationObjectSupport.setChannelResolver（org.springframework.messaging.core.DestinationResolver）] 在org.springframework.util.Assert.isNull（Assert.java:155）〜[spring-core-5.0.1.RELEASE.jar：5.0.1.RELEASE] at org.springframework.integration.util.MessagingMethodInvokerHelper.findHandlerMethodsForTarget（MessagingMethodInvokerHelper.java:776）〜[spring-integration-core-5.0.0.RC1.jar：5.0.0.RC1] at org.springframework.integration.util.MessagingMethodInvokerHelper。（MessagingMethodInvokerHelper.java:379）〜[spring-integration-core-5.0.0.RC1.jar：5.0.0.RC1] at org.springframework.integration.util.MessagingMethodInvokerHelper。（MessagingMethodInvokerHelper.java:225）〜[spring-integration-core-5.0.0.RC1.jar：5.0.0.RC1] at org.springframework.integration.util.MessagingMethodInvokerHelper。（MessagingMethodInvokerHelper.java:220）〜[spring-integration-core-5.0.0.RC1.jar：5.0.0.RC1] at org.springframework.integration.handler.MethodInvokingMessageProcessor。（MethodInvokingMessageProcessor.java:60）〜[spring-integration-core-5.0.0.RC1.jar：5.0.0.RC1] at org.springframework.integration.handler.ServiceActivatingHandler。（ServiceActivatingHandler.java:38）〜[spring-integration-core-5.0.0.RC1.jar：5.0.0.RC1] at org.springframework.integration.dsl.IntegrationFlowDefinition.handle（IntegrationFlowDefinition.java:924）〜[spring-integration-core-5.0.0.RC1.jar：5.0.0.RC1] at org.springframework.integration.dsl.IntegrationFlowDefinition.handle（IntegrationFlowDefinition.java:904）〜[spring-integration-core-5.0.0.RC1.jar：5.0.0.RC1] at org.springframework.integration.dsl.IntegrationFlowDefinition.handle（IntegrationFlowDefinition.java:891）〜[spring-integration-core-5.0.0.RC1.jar：5.0.0.RC1] at name.karwowski.blazej.integrationdemo2.DemoIntegration.flow（DemoIntegration.java:16）〜[classes /：na] at name.karwowski.blazej.integrationdemo2.DemoIntegration $$ EnhancerBySpringCGLIB $$ f82aadc3.CGLIB $ $流动0（）〜[classes /：na] at name.karwowski.blazej.integrationdemo2.DemoIntegration $$ EnhancerBySpringCGLIB $$ f82aadc3 $$ FastClassBySpringCGLIB $$ ef9b4b0c.invoke（）〜[classes /：na] at org.springframework.cglib.proxy.MethodProxy.invokeSuper（MethodProxy.java:228）〜[spring-core-5.0.1.RELEASE.jar：5.0.1.RELEASE] at org.springframework.context.annotation.ConfigurationClassEnhancer $ BeanMethodInterceptor.intercept（ConfigurationClassEnhancer.java:361）〜[spring-context-5.0.1.RELEASE.jar：5.0.1.RELEASE] at name.karwowski.blazej.integrationdemo2.DemoIntegration $$ EnhancerBySpringCGLIB $$ f82aadc3.flow（）〜[classes /：na] at sun.reflect.NativeMethodAccessorImpl.invoke0（Native 方法）〜[na：1.8.0_151] at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）〜[na：1.8.0_151] at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）〜[na：1.8.0_151] at java.lang.reflect.Method.invoke（Method.java:498）〜[na：1.8.0_151] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate（SimpleInstantiationStrategy.java:155）〜[spring-beans-5.0.1.RELEASE.jar：5.0.1.RELEASE] ... 19个常见帧省略

如何正确连接两个（或更多）队列通道？我需要在它们之间进行一些处理，并允许应用程序在停止时保留消息。

完整的日志和代码示例在github上：https://github.com/blazejkarwowski/integration-test

Answer 1

而不是.handle(secondJDBCChannel)，您必须使用.channel(secondJDBCChannel)。没有什么可以处理的 - 它介于两者之间。

有关详细信息，请参阅Reference Manual 。

在Spring Intgegration DSL中连接JDBC Store支持的两个队列通道

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