Best place to put startup code in EJB deployment?

Hi,
I'm working on an application which involves timer services and JMX, and I'd like to ask for your opinion on how to deal with startup of those services in an EJB deployment. If you dealt with those issues before, I'd appreciate it if you could share your experiences/best practices on the subject.
Timer services need to be started, and MBeans need to be registered with the MBeanServer, so I'd like to see how can this be done upon application deployment.
I'm using Sun Server as an EJB server.
Thanks,
Mark

Since the ejb spec doesn't define an application initialization event, the only portable way of doing this that I've heard of is to use the ServletContextListener.contextInitialized() event to send a message to an MDB within the same application. Since EJB Timers are persistent and their identity is tied to a particular application component, the MDB's onMessage method can use getTimers() to see whether the timer already exists. If not, it's the first time the application has been deployed.
I agree the auto-creation of timers upon deployment would be a good addition to the spec :-)
--ken

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Hey,
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modularity and user interface.
If you put the validation code in the client (jsp) then the user
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ianskinner wrote:
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Last edited by /dev/zero (2011-10-27 21:04:37)

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jasmeet wrote:
Hi
Our application needs to access data files (text files of thousands of records).
Which is the best place to keep them on the WLS.
I have tried the following
1. Placed them in APP-INF/lib directory.
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But i always get brw as null
Also tried using the method getResourceAsStream("MYFILENAME.DAT"). But got the
same error
ClassLoader cl = Thread.currentThread().getContextClassLoader();
InputStream is = cl.getResourceAsStream("BANKFILE_20030607.DAT");
BufferedReader brw = new BufferedReader(new InputStreamReader(is));
here also a NullPointerexception is thrown while creating a BufferedReader
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We could not pack them as part of ear as these data files would be very large
running into MBs
OR is it common to have such packaging in EARs ...
We also want to avoid accesseing them from an absolute path reference. The best
bet being the classpath
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jaz

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The default sequence when WLS is starting is deploying EJB first and then startUpClasses. Could someone tell me if it's possible to change the sequence.
Thanks a lot in advance.

Sure have your startup class do its work and then hot-deploy the EJB.
-- Rob
Jack wrote:
>
The default sequence when WLS is starting is deploying EJB first and then startUpClasses. Could someone tell me if it's possible to change the sequence.
Thanks a lot in advance.

Best place to put startup code in EJB deployment?

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