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References: <1352876993048-4659299.post@n4.nabble.com>
	<201211141522210943478@gmail.com>
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Date: Wed, 14 Nov 2012 07:03:04 -0700
Message-ID: 
 <CAKS7T5Ot=B1abaoqGwb73Prk62XGKYkDn8rPKbW1sPYVsk6Mrw@mail.gmail.com>
Subject: Re: blocking on multiple topics
From: Christian Posta <christian.posta@gmail.com>
To: "users@activemq.apache.org" <users@activemq.apache.org>
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Not sure there is a way to do what you're asking out of the box...
you could subscribe to both topic A and B using composite destinations, but
that would give you messages for both A and B, but not block until both A
and B had a message.
you might have to do some client-side coding for that.

http://activemq.apache.org/composite-destinations.html


On Wed, Nov 14, 2012 at 12:37 AM, wheels <marco.laponder@gmail.com> wrote:

> Considered that option, but in that case the consumer would also receive
> messages for topics C,D,E which he was not interested in. So I was
> wondering if there was a way to prevent that.
>
> Kind regards,
> Marc
>
> 2012/11/14 kimmking [via ActiveMQ] <
> ml-node+s2283324n4659300h23@n4.nabble.com>
>
> >
> > 1  consumer=EF=BC=8C many topics ?
> > why not use 1 topics and a different selector in every consumer to
> > separate its  interested message=EF=BC=9F
> >
> >
> >  *From:* [hidden email]<
> http://user/SendEmail.jtp?type=3Dnode&node=3D4659300&i=3D0>
> > *Date:* 2012-11-14 15:09
> > *To:* [hidden email]<
> http://user/SendEmail.jtp?type=3Dnode&node=3D4659300&i=3D1>
> > *Subject:* blocking on multiple topics
> >  Hi,
> >
> > I am an JMS/ActiveMQ newbi so please be patient.
> >
> > I have the following situation, I have one or more consumers interested
> in
> > a topic, so far so good, if I understand correctly I can do this with t=
he
> > publish/subscribe context and each client receives each published
> message.
> > And as I understand the client blocks until a new message is published.
> >
> > But what I really need is to allow consumers to be interested in multip=
le
> > topics, so we have topic A and B (completely different topics) and I wa=
nt
> > to block a consumer until a message is posted to A and B.
> >
> > Note that it possible that we have also topcis C,D,E but the consumer (=
or
> > at least some of them) are not interested in those topics.
> >
> > What is the most efficient way to have a consumer block until a message
> is
> > published to the topics the consumer is interested in (but not be
> notified
> > of messages of other topics he is not interested in)
> >
> > Regards,
> > Marc
> >
> >
> >
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*Christian Posta*
http://www.christianposta.com/blog
twitter: @christianposta

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