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From Charles Moulliard <cmoulli...@gmail.com>
Subject Re: Camel OSGi services component
Date Thu, 21 Jun 2012 06:34:10 GMT
Sergey,

I agree on Guillaume remark. We should improve what we have in camel
project instead of creating a new component. There is a new one "direct-vm"
which has been created in camel 2.10 (camel-core) to support communication
over camelContext when the camel routes runs in the same JVM. Personally I
would prefer that we register (like in NMR) the endpoints in the OSGI
Registry (= Global registry) and improve camel to also perform a lookup
(with or without filter) in this registry to facilitate communication
between bundle in a thread safe and transactional compatible way.

Regards,

Charles


On Thu, Jun 21, 2012 at 7:41 AM, Sergey Zhemzhitsky <szh.subs@gmail.com>wrote:

> Hi Guillaume,
>
> Of course if there is more convenient way to communicate between
> bundles there is no need in the component. On the moment of development
> of this component there were multiple ways to do that, for instance:
>
> 1. jms component which is rather heavyweight to do inter-bundle
> communication in the same jvm.
> 2. vm component which is asynchronous and does not support transactions
> 3. nmr component which can be used in synchronous mode, but does not
> support pub-sub, although it
>   does not prevent user from registering multiple consuming endpoints with
> the same name, so the
>   messages are sent only to the first registered nmr-consumer.
>
> The new direct-vm component solves the issue with transactions (like
> synchronous nmr does) but it does not
> support pub-sub too.
>
> To use a dynamic recipient list it's necessary to have some kind of custom
> code that will resolve
> addresses of recipients at runtime. In such a case syncronous nmr can be
> used as well. The benefit of
> OSGi services is that this is a standard functionality of OSGi runtime and
> even OSGi api predisposed
> to work with an array of them. Furthermore you will get all the benefits
> of OSGi services, i.e.
> dynamism, priorities, etc.
>
> It would be nice if direct-vm allowed to configure pub-sub with all the
> options of multicast processor.
>
> Regards,
> Sergey
>
> > I'm a bit skeptic about this component.
> > It seems at first glance that if conflates a few things like osgi
> > service access, multicast, etc...
> > If the goal is to do inter-bundle communication, the new component
> > coming from CAMEL-5370 should already do that and I don't really see
> > the need for the component.
> > For the multicast, using a dynamic recipient list coupled with
> > direct-vm should work.
>
> > On Tue, May 22, 2012 at 7:57 PM,  <szh.subs@gmail.com> wrote:
> >> Hi gurus,
> >>
> >> Recently  I've  published  camel  component that uses OSGi services to
> >> communicate between endpoints in different bundles.
> >>
> >> Here is the link: https://github.com/szhem/camel-osgi
> >> I've already raised JIRA issue -
> https://issues.apache.org/jira/browse/CAMEL-5292
> >>
> >> So I'd like to have some feedback if it seems to be useful.
> >>
> >> Regards,
> >> Sergey
> >>
> >>
>
>

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