How to let Spring manage my DLQ JMS connections

Question

I am using a DLQ listener to be invoked every minute via Spring scheduling as follows.

@Scheduled(fixedDelay=60000)
public void retryQueue() {
 ConnectionFactory cf =
          new ActiveMQConnectionFactory(uname, pwd, brokerName);
      Connection cn = cf.createConnection();
      cn.start();
      Session sess = cn.createSession(false, Session.AUTO_ACKNOWLEDGE);
      Destination queue = sess.createQueue(retryQueue);
      MessageConsumer messageConsumer = session.createConsumer(queue);
 //further message processing here
}

Now my question is that every minute a new connection gets made and destroyed. How can I let Spring handle that connection management so that it does not create a connection every time.

score 0 · Answer 1 · answered Jun 16 '18 at 13:48

0

Use a CachingConnectionFactory to wrap the ActiveMQConnectionFactory it will also cache the consumer, by default. If you just want the connection, disable consumer caching, or use the super class SingleConnectionFactory.

answered Jun 16 '18 at 13:48

Gary Russell

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This only works if the `SingleExceptionStrategy` is created outside of `retryQueue()` (i.e. as a bean). – Petter Nordlander Jun 18 '18 at 05:18
@PetterNordlander Can you explain that part more please – station Jun 19 '18 at 05:50
Also I deployed SingleConnectionFactory it resulted in just tipping my NAT ActiveConnectionCount in EC2 – station Jun 19 '18 at 08:03
@station I accidentally wrote `SingleExceptionFactory` instead of SingleConnectionFactory, but I guess you figured. Non the less, the `SingleConnectionFactory` must be instanciated once in the code, not every time the `retryQueue` method executes. Otherwise it will function just like an ordinary ConnectionFactory. – Petter Nordlander Jun 20 '18 at 06:34

How to let Spring manage my DLQ JMS connections

1 Answers1