原始状态的 activemq-client sdk 集成非常方便,也更适合定制。就是有些同学,可能对原始接口会比较陌生,会希望有个具体的示例。
<dependency><groupId>org.apache.activemq</groupId><artifactId>activemq-client</artifactId><version>${activemq.version}</version>
</dependency><dependency><groupId>org.apache.activemq</groupId><artifactId>activemq-pool</artifactId><version>${activemq.version}</version>
</dependency>
希望更加简化使用的同学,可以使用:
activemq-solon-cloud-plugin (使用更简单,定制性弱些)
1、添加集成配置
先使用 Solon 初始器 先生成一个 Solon Web 模板项目,然后添加上面的 activemq-client 依赖。再做个配置约定(也可按需定义):
具体的配置属性,参考自:ActiveMQConnectionFactory
solon.app:name: "demo-app"group: "demo"# 配置可以自由定义,与 @Bean 代码对应起来即可(以下为参考)
solon.activemq:properties: #公共配置(配置项,参考:ActiveMQConnectionFactory)brokerURL: "failover:tcp://localhost:61616"redeliveryPolicy:initialRedeliveryDelay: 5000backOffMultiplier: 2useExponentialBackOff: truemaximumRedeliveries: -1maximumRedeliveryDelay: 3600_000
添加 java 配置器
java">@Configuration
public class ActivemqConfig {@Bean(destroyMethod = "stop")public Connection client(@Inject("${solon.activemq.properties}") Props common) throws Exception {String brokerURL = (String) common.remove("brokerURL");String userName = (String) common.remove("userName");String password = (String) common.remove("password");ActiveMQConnectionFactory factory;if (Utils.isEmpty(userName)) {factory = new ActiveMQConnectionFactory(brokerURL);} else {factory = new ActiveMQConnectionFactory(brokerURL, userName, password);}//绑定额外的配置并创建连接Connection connection = common.bindTo(factory).createConnection();connection.start();return connection;}@Beanpublic IProducer producer(Connection connection) throws Exception {return new IProducer(connection);}@Beanpublic void consumer(Connection connection,MessageListener messageListener) throws Exception {Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);Destination destination = session.createTopic("topic.test");MessageConsumer consumer = session.createConsumer(destination);consumer.setMessageListener(messageListener);}
}
activemq 的消息发送的代码比较复杂,所以我们可以做个包装处理(用于上面的配置构建),临时命名为 IProducer:
java">public class IProducer {private Connection connection;public IProducer(Connection connection) {this.connection = connection;}public void send(String topic, MessageBuilder messageBuilder) throws JMSException {Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);Destination destination = session.createTopic(topic);MessageProducer producer = session.createProducer(destination);producer.send(destination, messageBuilder.build(session));}@FunctionalInterfacepublic static interface MessageBuilder {Message build(Session session) throws JMSException;}
}
3、代码应用
发送(或生产),这里代控制器由用户请求再发送消息(仅供参考):
java">@Controller
public class DemoController {@Injectprivate IProducer producer;@Mapping("/send")public void send(String msg) throws Exception {//发送producer.send("topic.test", s -> s.createTextMessage("test"));}
}
监听(或消费),这里采用订阅回调的方式:(仅供参考)
java">@Component
public class DemoMessageListener implements MessageListener {@Overridepublic void onMessage(Message message) {System.out.println(message);RunUtil.runAndTry(message::acknowledge);}
}