On 5/22/07, Anthrope <[EMAIL PROTECTED]> wrote:
All,
I've finished writing a persistence adaptor to Berkeley DB and am
beginning to test it out.
Awesome! Am looking forward to seeing how well it performs compared to
AMQStore/Kaha
My design is largely based on that of the existing
adaptors (JDBC, Kaha and Memory in particular). Things are working quite
nicely, with the exception that the beginTransaction(), commitTransaction()
and abortTransaction() methods on my persistence adaptor do not ever get
called!
Can someone shed any light on when these methods get called?
From looking at the code, it seems these methods are only used right
now if the journal is used with some PersistenceAdapter as a long term
store (i.e. to batch stuff up). If you are not using the journal with
your BDB PersistenceAdapter then I guess these methods won't be
called.
(FWIW, I
am using the MemoryTransaction store as my Transaction store). The other
question I have is the invocation of the shutdown hook. Since I am in
development, I have to continually kill the activemq process, and notice
that the shutdown hook doesn't always get called, which can be a bit
problematic. Is there some logic that determines whether or not the shutdown
hooks get invoked?
The shutdown hook is a JVM thing which usually gets called, but AFAIK
its not guarrenteed. (e.g. if you ctrl-c a process the hook won't fire
usually). Certainly you need to deal with the case where the hook is
never called.
--
James
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http://macstrac.blogspot.com/
