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From "James Strachan" <james.strac...@gmail.com>
Subject Re: Unable to create MessageProducer
Date Tue, 13 Nov 2007 10:35:19 GMT
failover is just used by the brokerURL property of the connection
factory.  Btw session and producers are cheap objects to keep around
they are just a bit slow to create on demand. For sending the
PooledConnectionFactory should help

On 12/11/2007, TOPPER_HARLEY <TREVOR.HIGGINS@ericsson.com> wrote:
>
> >"Its normally a glitch in the network - or that the broker died." :
> I'm pretty sure the broker was OK since a new client could get a connection
> & session and create a temp queue. I previously registered another query (
> http://www.nabble.com/Temp-queue-deleted-when-thread-interrupted-tf4393533s2354.html#a12527277
> here ) regarding using VM style and temp queues getting deleted so this is
> why we began using tcp style on server side.....
>
> >"This is an inefficient way of using JMS BTW...you should try pool
> producers if you can.":
>
> Yes I was reading that but was wondering what is a ballpark figure to start
> with for pooling e.g. 10 sessions & 10 producers (I realise its not possible
> to accurately w/o application knowledge but a best guess would be
> appreciated since they are heavy objects to create...?)
>
> >"Failover causes the client to reconnect to the broker if the socket
> dies.":
> Regarding where the failover syntax is needed, is this required in the
> transportConnector part of the activeMQ.xml or server side, or just the
> client i.e. as part of the
> org.apache.activemq.ActiveMQConnectionFactory.brokerURL for the
> SimpleMessageListenerContainer?
>
> /Tom
>
>
>
> James.Strachan wrote:
> >
> > On 12/11/2007, TOPPER_HARLEY <TREVOR.HIGGINS@ericsson.com> wrote:
> >> >"It could just be the socket has been dropped.":
> >> Is socket dropping a common occurence or simply related to the quality of
> >> the network one is running on (my TCP level knowledge isn't great).
> >
> > Its normally a glitch in the network - or that the broker died.
> >
> >> Would
> >> vm: style for the brokerURL prevent this since it would be insice JVM?
> >
> > Yes
> >
> >
> >> This is our setup:
> >> We have a number of predefined topics which we use when broadcasting
> >> updates
> >> and number temp queues for direct request/responses communication (one
> >> for
> >> each of our clients). We maintain one connection on the server side and
> >> as
> >> we send data from different threads, we cache a threadlocal session
> >> object
> >> (since ActiveMQSession is for single thread use). For each individual
> >> message send, we create and destroy a MessageProducer based on the
> >> destination as follows:
> >>
> >> try {
> >>       // Thread local retrieval
> >>       final Session session = this.getSession();
> >>       producer = session.createProducer(destination);
> >>       producer.send(message);
> >> } finally {
> >>      if (producer != null) {
> >>          try {
> >>              producer.close();
> >>          } catch (final JMSException e) {
> >>                  e.printStackTrace();
> >>          }
> >>       }
> >> }
> >
> > This is an inefficient way of using JMS BTW...
> >
> > http://activemq.apache.org/how-do-i-use-jms-efficiently.html
> >
> > you should try pool producers if you can.
> >
> >
> >> >"You night wanna enable failover...":
> >> We have only been assigned one port for the broker (specified obviously
> >> as
> >> part of the brokerURL property) so I dont know if failover can assist us:
> >
> > Failover causes the client to reconnect to the broker if the socket dies.
> >
> >
> >>  my
> >> understanding of failover is that you need more than one URI and AMQ
> >> switches to another one if one broker goes down:
> >
> > Not true - it works fine with a single broker URI
> >
> > --
> > James
> > -------
> > http://macstrac.blogspot.com/
> >
> > Open Source SOA
> > http://open.iona.com
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/Unable-to-create-MessageProducer-tf4782623s2354.html#a13709793
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>


-- 
James
-------
http://macstrac.blogspot.com/

Open Source SOA
http://open.iona.com

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