【20200129】SpringBoot ActiveMQ

如何创建SpringBoot项目

访问https://start.spring.io/。

依次选择构建工具Maven Project、语言java、Spring Boot版本2.0.5，点击Generate Project下载项目压缩包，解压后倒入到ide中即可。（idea集成了SpringBoot，可直接创建项目）

如何整合ActiveMQ

1、添加spring-boot-starter-activemq依赖

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-activemq</artifactId>
        </dependency>

2、添加配置

spring.activemq.in-memory=true
spring.activemq.pool.enabled=false

3、添加SampleActiveMQApplication类

@SpringBootApplication
@EnableJms
public class SampleActiveMQApplication {
    @Bean
    public Queue queue() {
        return new ActiveMQQueue("sample.queue");
    }
    public static void main(String[] args) {
        SpringApplication.run(SampleActiveMQApplication.class, args);
    }
}

4、添加Consumer类

@Component
public class Consumer {
    @JmsListener(destination = "sample.queue")
    public void receiveQueue(String text) {
        System.out.println(text);
    }
}

5、添加Producer类

@Component
public class Producer implements CommandLineRunner {
    @Autowired
    private JmsMessagingTemplate jmsMessagingTemplate;
    @Autowired
    private Queue queue;
    @Override
    public void run(String... args) throws Exception {
        send("Sample message");
        System.out.println("Message was sent to the Queue");
    }
    public void send(String msg) {
        this.jmsMessagingTemplate.convertAndSend(this.queue, msg);
    }
}

6、启动服务
控制台输出：

Message was sent to the Queue
Sample message

以上例子使用的是SpringBoot内部的ActiveMQ，实际使用时肯定会用外部的ActiveMQ。

如何连接外部的ActiveMQ

1、添加依赖

<dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-pool</artifactId>
        </dependency>

2、修改配置

spring.activemq.broker-url=tcp://localhost:61616
spring.activemq.close-timeout=5000
spring.activemq.in-memory=false
spring.activemq.pool.enabled=true
spring.activemq.pool.max-connections=100
spring.activemq.send-timeout=3000

3、启动服务
首先，确保ActiveMQ已经启动。控制台输出：

Message was sent to the Queue
Sample message

如何使用topic

1、在SampleActiveMQApplication中添加：

@Bean
    public Topic topic() {
        return new ActiveMQTopic("sample.topic");
    }
    @Bean
    public JmsListenerContainerFactory<?> jmsListenerContainerTopic(ConnectionFactory activeMQConnectionFactory) {
        DefaultJmsListenerContainerFactory bean = new DefaultJmsListenerContainerFactory();
        bean.setPubSubDomain(true);
        bean.setConnectionFactory(activeMQConnectionFactory);
        return bean;
    }

2、创建TopicConsumer类

@Component
public class TopicConsumer {
    @JmsListener(destination = "sample.topic", containerFactory = "jmsListenerContainerTopic")
    public void receiveTopic1(String text) {
        System.out.println(text);
    }
    @JmsListener(destination = "sample.topic", containerFactory = "jmsListenerContainerTopic")
    public void receiveTopic2(String text) {
        System.out.println(text);
    }
}

3、创建TopicProducer类

@Component
public class TopicProducer implements CommandLineRunner {
    @Autowired
    private JmsMessagingTemplate jmsMessagingTemplate;
    @Autowired
    private Topic topic;
    @Override
    public void run(String... args) throws Exception {
        send("Topic message");
        System.out.println("Message was sent to the Topic");
    }
    public void send(String msg) {
        this.jmsMessagingTemplate.convertAndSend(this.topic, msg);
    }
}

4、启动服务
控制台输出：

Message was sent to the Topic
Topic message
Topic message

项目地址：SpringBoot2.0整合ActiveMQ