Quick question which I cannot find the answer to on the BAM page.

How reliable is the BAM service?  Does it provide a persistent  
subscription feature like JMS?  In critical services where packets are  
sent and must be processed by a subscriber without losing that  
information, does BAM take care of this?  Is there also a transaction  
feature to BAM where a message could either be put back into the queue  
to be retried if transaction fails and rolls back?

it may be that BAM is currently geared towards the chat architecture  
such as twitter/IM/comet/etc so this may not apply, but I'd like to  
know the options available.

What's the plan for Resin's BAM and JMS implementation?  Separate or  
may be integrated into one?


On Aug 7, 2008, at 8:58 AM, Scott Ferguson wrote:

> Resin 3.2.0 is now available at the usual download http://caucho.com/download
> .  Release notes are at http://caucho.com/resin/changes/resin-3.2.0.xtp 
> .
> Resin 3.2.x is the development branch.  We have a full roadmap of
> stuff to add to 3.2.x, so 3.2.x will be changing considerably for each
> release.  For sites that don't want that kind of code-upheaval, use
> the 3.1.x stable branch.
> Much of the 3.2.0 work was underlying refactoring and distribution/
> release refactoring.  Jars have been merged, so resin.jar and
> javaee-16.jar are the only needed jars for Resin OpenSource.  Resin
> Pro also needs pro.jar.  Also, the resin.xml replaces resin.conf (to
> make editors/mail happy), and a bunch of smaller changes in the
> distribution layout.
> The 3.2.0 release now includes a 32-bit debian package at the download
> site, which will make installation easier for Debian Linux sites
> including Ubuntu.
> For administration, the /resin-admin has been reworked and enhanced.
> New capabilities include:
>   * graphing of critical statistics
>   * revised and enhanced summary page
>   * monitoring and display of slow requests
>   * new JMX page displaying all MBeans and attributes in the system
>   * revised web-app page including start/stop/restart
> For alerts, we've added a "mail:" log-handler, which can email you a
> compilation of the severe and critical log messages (this is very
> handy.)
> The threading and socket management has been refactored to better
> handle comet and jabber connections.  During the checkout process, we
> loaded it with 25,000 simultaneous comet connections as a stress test.
> The distributed sessions have been reworked to use BAM as the
> underlying transport, and the database restructured to handle planned
> distributed object enhancements like distributed caching, and better
> startup performance.   Both the threading and session refactorings are
> major changes, so sites relying on them should do their own stress
> testing.
> Our JSF implementation now includes a handy debugging page, to better
> show the state of the JSF system.  The example at 
> http://caucho.com/resin/examples/jsf-webbeans.xtp
>  shows this capability (see the bottom right corner.)
> BAM (http://caucho.com/resin/doc/bam.xtp) has been refactored and
> cleaned up.  It can now act as a SEDA/queue replacement for memory-
> based JMS queues.  The client and service have been simplified, so the
> housekeeping overhead is now minimal.  In addition, you can now
> program to BAM using PHP, which is a very cool feature.
> Share and Enjoy!
> -- Scott
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