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From "Sanjiv Jivan" <sanjiv.ji...@gmail.com>
Subject Re: activemq from C++ application in linux and window
Date Thu, 13 Jul 2006 18:31:36 GMT
We've done some profiling and haven't found the marshalling over JNI to be
significant for our requirements, especially with JDK 1.4+.

btw does ActiveMQ C++ handle network byte ordering when client / server are
on machines with different byte ordering?

Thanks,
Sanjiv


On 7/13/06, Timothy Bish <tabish@twcny.rr.com> wrote:
>
> Sanjiv
>
> You design does sound interesting.  Its been awhile since I've done any
> JNI
> coding.  As with anything there are tradeoffs that you make when you go
> that
> route, as I recall marshalling between contexts can be a big hit to
> overall
> app performance, but at the end of the day, if it meets your requirements
> then you can't complain to much.
>
> As far as the cross platform threading issues go, we have created a fairly
> nice Threading implementation in the new activemq-cpp that resembles java
> threading in its use, and has been tested pretty heavily on Windows and
> Linux, we still need to hit OSX and Solaris.
>
> -------------------------------------------------
> Timothy A. Bish
>
>
> -----Original Message-----
> From: Sanjiv Jivan [mailto:sanjiv.jivan@gmail.com]
> Sent: Thursday, July 13, 2006 7:29 AM
> To: activemq-users@geronimo.apache.org
> Subject: Re: activemq from C++ application in linux and window
> Importance: High
>
> In our project, we embedded a JVM in the C++ app, and exposed methods for
> inbound -> C++ delegation and C++ --> JNI method to send messages using
> the
> JNI RegisterNatives function. This helps us do all our jms configuration
> using Spring and also keeps the messaging code in Java. The ActiveMQ
> java-java communication seemed more mature than the C++ portion and it
> also
> kept us away from cross platform threading issues associated with C++
> apps.
>
> Any comments on this approach?
>
> Sanjiv
>
> On 7/13/06, Nathan Mittler <nathan.mittler@gmail.com> wrote:
> >
> > Hi Vishu,
> > comments inline ...
> >
> > On 7/13/06, Vishu <vkagrawall@yahoo.com> wrote:
> > >
> > >
> > > Hi Nate,
> > > Thanks a lot for your response.
> > > Sorry for bug you again asking stupid questions
> > > My requirement is something like. There are two applications one main
> > > application (App1) written in C++ and second application (app2)
> written
> > in
> > > Java. Where App1 will be publishing messages regularly (the no may be
> > 1000
> > > message per second or more) these messages need to go to Activemq and
> > App2
> > > should be able to subscribe for those message.
> >
> >
> > I see no problems with the data load, in our testing we were sending
> > several
> > thousand messages all at once.
> >
> >
> > I need a persistence
> > > messaging no message should be lost. Because App1 and App2 are running
> > on
> > > different m/c?s and may not be running at the same time.
> >
> > But looking at
> > > http://www.activemq.org/site/activemq-cpp-roadmap.html
> > > There is known issue
> > > After committing a transaction, the consumer seems to stop getting
> > > messages
> > > after around 999/1000 messages.  We think this is a bug at the broker,
> > but
> > > more investigation is needed.
> >
> >
> > It may be worth noting that this test was done from C++ client to C++
> > client
> > which may have different results than going from Java->C++.  So it may
> be
> > worth your time giving it a shot as you should be able to set up a test
> > fairly quickly.
> >
> > Also I don't know whether they have had any release of ActiveMq C++
> > client,
> > > I did not find that on web or is it yet to be released it is still
> under
> > > development.
> >
> >
> > There is no official release yet, as we're still doing some cleanup
> before
> > we begin to port the openwire C++ client.  I'm guessing that once we get
> > openwire in, we'll begin to be incorporated in the mainline release
> cycle
> > with the rest of AMQ.
> >
> > --
> > > View this message in context:
> > >
> >
>
> http://www.nabble.com/activemq-from-C%2B%2B-application-in-linux-and-window-
> tf1932905.html#a5302652
> > > Sent from the ActiveMQ - User forum at Nabble.com.
> >
> >
> > Regards,
> > Nate
> >
> >
>
>

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