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From miniman <benjamin.cuthb...@db.com>
Subject Re: catching exceptions on login
Date Tue, 06 Feb 2007 13:34:34 GMT

Transport listner sounds good, do you have an example of this ?



James.Strachan wrote:
> 
> What do you want to do if the broker is down? Let the user know about
> it and keep waiting until a connection is established?
> 
> The simplest solution today is to use auto-reconnect...
> http://activemq.apache.org/how-can-i-support-auto-reconnection.html
> 
> then the createConnection() method will block until a valid login
> attempt is made (so you know if the login worked or not).
> 
> You might wanna use a background thread to do the login to avoid
> blocking the main thread.
> 
> Then to let the user know of connection problems you can use the
> transport listener...
> http://activemq.apache.org/maven/activemq-core/apidocs/org/apache/activemq/ActiveMQConnection.html#addTransportListener(org.apache.activemq.transport.TransportListener)
> 
> 
> Another approach is just to catch the JMS exceptions and differentiate
> between a login failure from a connection failure - maybe thats
> simpler for you?
> 
> On 2/6/07, miniman <benjamin.cuthbert@db.com> wrote:
>>
>> All if i have a client which i want to catch an exception is the client
>> is
>> unable to connect. So if the activemq is down i still want the client to
>> work but just display a message that the host is down.
>>
>> When i try
>>
>>  // Create a Connection
>>               Connection connection =
>> connectionFactory.createConnection();
>>               connection.setExceptionListener(this);
>>
>> I get the exception but it does not come from my class
>>
>> Caught: javax.jms.JMSException: Could not connect to broker URL:
>> tcp://localhost:61616. Reason: java.net.ConnectException: Connection
>> refused: connectjavax.jms.JMSException: Could not connect to broker URL:
>> tcp://localhost:61616. Reason: java.net.ConnectException: Connection
>> refused: connect
>>         at
>> org.apache.activemq.util.JMSExceptionSupport.create(JMSExceptionSupport.java:33)
>>         at
>> org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:271)
>>         at
>> org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:211)
>>         at
>> org.apache.activemq.ActiveMQConnectionFactory.createConnection(ActiveMQConnectionFactory.java:158)
>>         at
>> com.db.abmonitor.client.dataimporter.TopicConsumer.run(TopicConsumer.java:40)
>>
>> My method is
>>
>>       public synchronized void onException(JMSException ex) {
>>           System.out.println("JMS Exception occured.  Shutting down
>> client.");
>>       }
>> --
>> View this message in context:
>> http://www.nabble.com/catching-exceptions-on-login-tf3180552.html#a8825721
>> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>>
>>
> 
> 
> -- 
> 
> James
> -------
> http://radio.weblogs.com/0112098/
> 
> 

-- 
View this message in context: http://www.nabble.com/catching-exceptions-on-login-tf3180552.html#a8825990
Sent from the ActiveMQ - User mailing list archive at Nabble.com.


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