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。
xml
<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):
- "solon.activemq",作为配置前缀
- "properties",作为公共配置
- "producer",作为生态者专属配置(估计用不到)
- "consumer",作为消费者专属配置(估计用不到)
具体的配置属性,参考自:ActiveMQConnectionFactory
yaml
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: 5000
backOffMultiplier: 2
useExponentialBackOff: true
maximumRedeliveries: -1
maximumRedeliveryDelay: 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;
}
@Bean
public IProducer producer(Connection connection) throws Exception {
return new IProducer(connection);
}
@Bean
public 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));
}
@FunctionalInterface
public 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 {
@Inject
private 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 {
@Override
public void onMessage(Message message) {
System.out.println(message);
RunUtil.runAndTry(message::acknowledge);
}
}