Spring 雲 Stream 與 RabbitMQ 連接

Question

有一個簡單的 Spring-Cloud-Stream 項目，我嘗試與 RabbitMQ 連接，它說它已連接但它不工作。 我在代碼中做錯了嗎？

應用程序屬性

spring.rabbitmq.host=localhost
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
spring.cloud.stream.bindings.greetingChannel.destination = greetings
server.port=8080

HelloBinding 接口

package com.gateway.cloudstreamproducerrabbitmq;

import org.springframework.cloud.stream.annotation.Input;
import org.springframework.cloud.stream.annotation.Output;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.SubscribableChannel;

public interface HelloBinding {

    @Output("greetingChannel")
    MessageChannel greeting();
}

生產者控制器

package com.gateway.cloudstreamproducerrabbitmq;

import com.gateway.cloudstreamproducerrabbitmq.HelloBinding;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class ProducerController {

    private MessageChannel greet;

    public ProducerController(HelloBinding binding) {
        greet = binding.greeting();
    }

    @GetMapping("/greet/{name}")
    public void publish(@PathVariable String name) {
        String greeting = "Hello, " + name + "!";
        Message<String> msg = MessageBuilder.withPayload(greeting)
                .build();
        this.greet.send(msg);
    }
}

最后我在啟動應用程序的主 class 中有一個@EnableBinding(HelloBinding.class) 。

Answer 1

要使用 rabbitmq 活頁夾實現設置 spring 雲 stream，您需要在 pom.Z0F6735D0E0F3287 中配置它。

 <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-stream</artifactId>
 </dependency>
 <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-stream-binder-rabbit</artifactId>
 </dependency>
 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
 </dependency>

然后你在你的 application.properties/yaml 中定義它

2.

spring:
    cloud:
        stream:
            bindings:
                greetingChannel
                    destination: test.greeting
                    group: queue
            rabbit:
                bindings:
                    greetingChannel:
                        producer:
                            transacted: true //optional

3. EnableBinding(HelloBinding.class)
4. 注入綁定並使用它

helloBinding.greeting().send(MessageBuilder
                .withPayload(...)
                .build());

5. rabbitMQ 屬性的設置