我正在将Spring Cloud Stream与Spring Boot结合使用.我的申请非常简单:
ExampleService.class:
@EnableBinding(Processor1.class) @Service public class ExampleService { @StreamListener(Processor1.INPUT) @SendTo(Processor1.OUTPUT) public String dequeue(String message){ System.out.println("New message: " + message); return message; } @SendTo(Processor1.OUTPUT) public String queue(String message){ return message; } }Procesor1.class:
public interface Processor1 { String INPUT = "input1"; String OUTPUT = "output1"; @Input(Processor1.INPUT) SubscribableChannel input1(); @Output(Processor1.OUTPUT) MessageChannel output1(); }application.properties:
spring.cloud.stream.bindings.input1.destination=test_input spring.cloud.stream.bindings.input1.group=test_group spring.cloud.stream.bindings.input1.binder=binder1 spring.cloud.stream.bindings.output1.destination=test_output spring.cloud.stream.bindings.output1.binder=binder1 spring.cloud.stream.binders.binder1.type=rabbitspring.cloud.stream.binders.binder1.environment.spring.rabbitmq.host = localhost
场景:
1)当我在"test_input.test_group"队列中推送消息时,消息被正确打印并正确发送到"test_output"交换.所以ExampleService :: dequeue效果很好.
2)当我调用ExampleService :: queue方法(从类外部,在测试中)时,消息永远不会发送到'test_output'交换.
我正在使用Spring Boot 2.0.6.RELEASE和Spring Cloud Stream 2.0.2.RELEASE.
有人知道为什么情况2)无法正常工作吗?预先感谢.
解决方案是什么让您相信@SendTo本身受支持? @SendTo是许多项目使用的辅助注释,而不仅仅是Spring Cloud Stream;据我所知,没有什么可以自己寻找的.
改为尝试Spring Integration的@Publisher注释(使用@EnablePublisher).
编辑
要强制使用CGLIB而不是JDK代理进行代理,您可以执行此操作...
@Bean public static BeanFactoryPostProcessor bfpp() { return bf -> { bf.getBean(IntegrationContextUtils.PUBLISHER_ANNOTATION_POSTPROCESSOR_NAME, PublisherAnnotationBeanPostProcessor.class).setProxyTargetClass(true); }; }I'm using Spring Cloud Stream with Spring Boot. My application is very simple:
ExampleService.class:
@EnableBinding(Processor1.class) @Service public class ExampleService { @StreamListener(Processor1.INPUT) @SendTo(Processor1.OUTPUT) public String dequeue(String message){ System.out.println("New message: " + message); return message; } @SendTo(Processor1.OUTPUT) public String queue(String message){ return message; } }Procesor1.class:
public interface Processor1 { String INPUT = "input1"; String OUTPUT = "output1"; @Input(Processor1.INPUT) SubscribableChannel input1(); @Output(Processor1.OUTPUT) MessageChannel output1(); }application.properties:
spring.cloud.stream.bindings.input1.destination=test_input spring.cloud.stream.bindings.input1.group=test_group spring.cloud.stream.bindings.input1.binder=binder1 spring.cloud.stream.bindings.output1.destination=test_output spring.cloud.stream.bindings.output1.binder=binder1 spring.cloud.stream.binders.binder1.type=rabbitspring.cloud.stream.binders.binder1.environment.spring.rabbitmq.host=localhost
Scenarios:
1) When I push a message in 'test_input.test_group' queue, message is correctly printed and correctly sent to 'test_output' exchange. So ExampleService::dequeue works well.
2) When I invoke ExampleService::queue method (from outside the class, in a test), message is never sent to 'test_output' exchange.
I'm working with Spring Boot 2.0.6.RELEASE and Spring Cloud Stream 2.0.2.RELEASE.
Anybody knows why scenario 2) is not working? Thanks in advance.
解决方案What leads you to believe that @SendTo on its own is supported? @SendTo is a secondary annotation used by many projects, not just Spring Cloud Stream; as far as I know, there is nothing that will look for it on its own.
Try Spring Integration's @Publisher annotation instead (with @EnablePublisher).
EDIT
To force proxying with CGLIB instead of a JDK proxy, you can do this...
@Bean public static BeanFactoryPostProcessor bfpp() { return bf -> { bf.getBean(IntegrationContextUtils.PUBLISHER_ANNOTATION_POSTPROCESSOR_NAME, PublisherAnnotationBeanPostProcessor.class).setProxyTargetClass(true); }; }
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