Spring Cloud Stream消费失败后的处理策略（四）：重新入队（RabbitMQ）

4-Finchley/pom.xml

@@ -17,6 +17,11 @@
         <module>stream-exception-handler-2</module>
         <!-- 使用DLQ队列（RabbitMQ） -->
         <module>stream-exception-handler-3</module>
+        <!-- 重入队列（RabbitMQ） -->
+        <module>stream-exception-handler-4</module>
+
+        <!-- @StreamListener根据内容路由 -->
+        <module>stream-content-route</module>
 
     </modules>
 

4-Finchley/stream-exception-handler-4/pom.xml

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>stream-exception-handler-4</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<packaging>jar</packaging>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.0.5.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<version>1.18.2</version>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-stream-rabbit</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+	</dependencies>
+
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.springframework.cloud</groupId>
+				<artifactId>spring-cloud-dependencies</artifactId>
+				<version>Finchley.SR1</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+</project>

4-Finchley/stream-exception-handler-4/src/main/java/com/didispace/stream/TestApplication.java

@@ -0,0 +1,89 @@
+package com.didispace.stream;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.amqp.AmqpRejectAndDontRequeueException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.stream.annotation.EnableBinding;
+import org.springframework.cloud.stream.annotation.Input;
+import org.springframework.cloud.stream.annotation.Output;
+import org.springframework.cloud.stream.annotation.StreamListener;
+import org.springframework.integration.support.MessageBuilder;
+import org.springframework.messaging.MessageChannel;
+import org.springframework.messaging.SubscribableChannel;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+
+@EnableBinding(TestApplication.TestTopic.class)
+@SpringBootApplication
+public class TestApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(TestApplication.class, args);
+    }
+
+    @RestController
+    static class TestController {
+
+        @Autowired
+        private TestTopic testTopic;
+
+        /**
+         * 消息生产接口
+         *
+         * @param message
+         * @return
+         */
+        @GetMapping("/sendMessage")
+        public String messageWithMQ(@RequestParam String message) {
+            testTopic.output().send(MessageBuilder.withPayload(message).build());
+            return "ok";
+        }
+
+    }
+
+    /**
+     * 消息消费逻辑
+     */
+    @Slf4j
+    @Component
+    static class TestListener {
+
+        private int count = 1;
+
+        @StreamListener(TestTopic.INPUT)
+        public void receive(String payload) {
+            log.info("Received payload : " + payload + ", " + count);
+            throw new RuntimeException("Message consumer failed!");
+
+            // 进入DLQ的逻辑
+//            if (count == 3) {
+//                count = 1;
+//                throw new AmqpRejectAndDontRequeueException("tried 3 times failed, send to dlq!");
+//            } else {
+//                count ++;
+//                throw new RuntimeException("Message consumer failed!");
+//            }
+
+        }
+
+    }
+
+    interface TestTopic {
+
+        String OUTPUT = "example-topic-output";
+        String INPUT = "example-topic-input";
+
+        @Output(OUTPUT)
+        MessageChannel output();
+
+        @Input(INPUT)
+        SubscribableChannel input();
+
+    }
+
+}

4-Finchley/stream-exception-handler-4/src/main/resources/application.properties

@@ -0,0 +1,12 @@
+spring.application.name=stream-exception-handler-4
+server.port=8080
+
+spring.cloud.stream.bindings.example-topic-input.destination=test-topic
+spring.cloud.stream.bindings.example-topic-input.group=stream-exception-handler
+spring.cloud.stream.bindings.example-topic-input.consumer.max-attempts=1
+
+spring.cloud.stream.rabbit.bindings.example-topic-input.consumer.auto-bind-dlq=true
+spring.cloud.stream.rabbit.bindings.example-topic-input.consumer.requeue-rejected=true
+
+spring.cloud.stream.bindings.example-topic-output.destination=test-topic
+