我发现唯一可行的方法是创建自己的 Mediator,它将设置消息的生存时间并将其发送到队列。队列名称按顺序预设,然后称为中介:
<property xmlns="http://ws.apache.org/ns/synapse" name="qname" value="your_queue_name" scope="default" type="STRING"></property>
<class xmlns="http://ws.apache.org/ns/synapse" name="com.example.JMSMessageTimeToLiveMediator"></class>
中介类:
public class JMSMessageTimeToLiveMediator extends AbstractMediator implements
ManagedLifecycle {
private static String CON_FACTORY_NAME = "QueueConnectionFactory";
private static String DEF_PROP_QNAME = "qname";
private static long TIME_TO_LIVE = 60000;
private static QueueConnectionFactory cf;
public boolean mediate(MessageContext context) {
Connection connection = null;
Session session = null;
try {
connection = cf.createQueueConnection();
connection.start();
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
String queueName = (String) context.getProperty(DEF_PROP_QNAME);
Destination destination = session.createQueue(queueName);
MessageProducer producer = session.createProducer(destination);
producer.setTimeToLive(TIME_TO_LIVE);
TextMessage message = session.createTextMessage(context
.getEnvelope().toString());
producer.send(message);
} catch (JMSException e) {
log.error("ProduceJMS ERROR: " + e.getClass() + " "
+ e.getMessage());
} catch (Exception e) {
log.error("ProduceJMS ERROR: " + e.getClass() + " "
+ e.getMessage());
} finally {
try {
session.close();
connection.close();
} catch (JMSException e) {
log.error("ProduceJMS ERROR: " + e.getMessage());
}
}
return true;
}
public void init(SynapseEnvironment emvironment) {
Hashtable<String, Object> environment = new Hashtable<String, Object>();
environment.put("java.naming.factory.initial",
"org.apache.activemq.jndi.ActiveMQInitialContextFactory");
log.debug("ProduceJMS INIT");
try {
InitialContext ic = new InitialContext(environment);
cf = (QueueConnectionFactory) ic.lookup(CON_FACTORY_NAME);
} catch (NamingException e) {
log.error("ProduceJMS INIT ERROR: " + e.getMessage());
}
}
public void destroy() {
}
}