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Date: Tue, 29 May 2012 07:40:19 -0400
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Subject: Re: QPID (JMS) - What is the best way to check if the connection is
 still valid?
From: Rajith Attapattu <rajith77@gmail.com>
To: users@qpid.apache.org, keith.wall@gmail.com
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All though what Keith mentioned is a viable solution in the short term it
may not be going forward as the new client that we are going to be build
*may* not have these extensions in this exact form. A comparable solution
may or may not be added.

Therefore I would be a bit cautious when using anything that is not part of
the official JMS interfaces.
Otherwise you may find upgrading to a new release a bit cumbersome.

Regards.

Rajith

On Tue, May 29, 2012 at 4:04 AM, Keith W <keith.wall@gmail.com> wrote:

> Hello Hamid
>
> In addition to what Rajith has said already, you may also may want to look
> at the ConnectionListener.
>
> ConnectionListener#preFailover() is fired immediately before the client
> begins the attempt to re-estabish a connection.  Once the client has
> reestablished the connection, it will fire
> ConnectionListener#failoverComplete.  You might consider using this
> listener to _trigger_ the logging you desire.
>
> The ConnectionListener interface is a Qpid specific extension to the JMS
> API, but is part of the Qpid public API.  To set the ConnectionListener,
> you need to cast the JMS Connection object back to its AMQConnection and
> call setConnectionListener, passing your implementation of the
> ConnectionListener interface.
>
>
> AMQConnection#setConnectionListener(org.apache.qpid.jms.ConnectionListener);
>
> Hope this helps
>
> Keith,.
>
>
>
> On 28 May 2012 18:34, Rajith Attapattu <rajith77@gmail.com> wrote:
>
> > Hamid,
> >
> > At the moment JMS provides transparent failover. Therefore you will only
> > get notified (via the exception listener) if you cannot reconnect
> > successfully.
> > Since these reconnects are transparent to the application, I wonder why
> you
> > want to log them?
> >
> > If you really want to go that route, you could turn off transparent
> > failover using failover='nofailover' in the connection URL.
> > This will allow you to reconnect manually instead of letting the client
> do
> > it and you could easily do you logging.
> >
> > Another potential option is to look at what QMF might offer.
> > QMF (the management framework) *may* provide events if a connection is
> lost
> > under certain circumstances.
> > Ex. network issue.  However it will not provide events if the broker
> being
> > connected to dies.
> >
> > Hope this helps.
> >
> > Rajith
> >
> > On Mon, May 28, 2012 at 6:28 AM, Hamid.Shahid <hamid2418@hotmail.com>
> > wrote:
> >
> > > Hi,
> > >
> > > I am using Qpid in a java application (JMS). I am creating a connection
> > > object to connect with the borker and to read messages from the queue,
> I
> > am
> > > using MessageListener. Everything is working fine. When I lose the
> > > connection with the broker, the qpid logs the exceptions and tries to
> > > reconnect with broker again until it connects and everything starts to
> > work
> > > fine again.
> > >
> > > But, I want to log some extra logging from a seprate thread while qpid
> is
> > > trying to reconnect and somehow the connection object never get null
> and
> > > the
> > > qpid exceptions are not breaking the thread. So, is there a way I can
> > check
> > > the current status of the connection?
> > >
> > > The only way I found is the try to create a new temp session in the
> > thread
> > > and if it fails I do the logging and if it does not I close the temp
> > > session. But I think it is not the best way, since it will create a
> temp
> > > session in the thread every 30sec.
> > >
> > > Please let me know, how can I get the connection status.
> > >
> > > Thank you.
> > >
> > > - Hamid.
> > >
> > > --
> > > View this message in context:
> > >
> >
> http://qpid.2158936.n2.nabble.com/QPID-JMS-What-is-the-best-way-to-check-if-the-connection-is-still-valid-tp7578072.html
> > > Sent from the Apache Qpid users mailing list archive at Nabble.com.
> > >
> > > ---------------------------------------------------------------------
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> > > For additional commands, e-mail: users-help@qpid.apache.org
> > >
> > >
> >
>

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