Hi Jean,
A MessageListener should only be set if you are using an asynchronous
consumer, you will need to comment out
"subscriber.setMessageListener(ml);" in your code if you're going to be
using a synchronous consumer (ie. consumer.receive) which looks to be
the case in your sample code. afaik, a consumer can only either receive
messages synchronously or asynchronously but not both.
Regards,
Jonas
JS75 wrote:
Dear All:
I tried to receive message from topic, however, I got exception below.
[java] [java] javax.jms.IllegalStateException: Cannot
synchronously receive a message when a MessageListener is set
[java] [java] at
org.apache.activemq.ActiveMQSession.checkMessageListener(ActiveMQSession.java:1723)
[java] [java] at
org.apache.activemq.ActiveMQMessageConsumer.checkMessageListener(ActiveMQMessageConsumer.java:631)
[java] [java] at
org.apache.activemq.ActiveMQMessageConsumer.receive(ActiveMQMessageConsumer.java:468)
In my code, I initital a topic subsrciber to receive a message and set it
with one message listener.
subscriber.setMessageListener(ml); // ml is the message listener
I have no idea why throws this exception..
Sincerely,
Jean
