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From "Manu George" <manu.t.geo...@gmail.com>
Subject Re: Improved EJB integration... can we get some portlets?
Date Fri, 10 Oct 2008 12:32:18 GMT
I was wrong in my assumption that gbeans are not recreated at startup.
They are and their constructors are called.However the portlet should
still depend on the openejb configuration and so it will be stopped in
case openejb configuration is stopped.

Regards
Manu

On Fri, Oct 10, 2008 at 5:47 PM, Manu George <manu.t.george@gmail.com> wrote:
> Hi David,
>             Thanks for replying. I have put a few questions/comments
> inline below
>
> On Wed, Oct 8, 2008 at 10:09 PM, David Jencks <david_jencks@yahoo.com> wrote:
>>
>> On Oct 8, 2008, at 7:42 AM, Manu George wrote:
>>
>
>>
>> To me it looks like you are basically proposing a plan editor or config.xml
>> editor for openejb.  You can't safely change the actual attribute values at
>> runtime so lets look for a solution that doesn't pretend to be able to.
>>
>> I think you have three possible strategies here:
>>
>> 1. create a plan editor for plans similar to the openejb plugin and use it
>> to generate replacements for the openejb plugin
>
> Generating an entire new plugin, and installing it seems to be a lot
> of work for the user for just changing configuration parameters. A
> restart of the openejb configuration looks to be simpler. Another
> factor here is that there is no mention of the MdbContainer in the
> plan as it is generated dynamically for the RA. So such an editor
> won't show the Mdb Container properties.
>
>> 2. create an editor for specified customizations of config.xml.  This might
>> or might not be practical.  It's more likely to work if the openejb plugin
>> is stopped when you edit gbean attribute values.
>
> If I do stop the openejb configuration then would I be able to edit
> the gbean attributes? After all they are final and would have already
> been intialized.  I am assuming that even before a gbean is started
> its constructor is called. (GBean Loading Stage).
>  Another issue here is since the portlet should depend on the openejb
> configuration it will also get stopped and removed from the admin
> console if I stop the openejb configuration.
>
> I am unable to change the attributes of the gbean at runtime as all
> the fields are final and there are no setter methods. However if I
> have setter methods then i would be able to set the attributes at
> runtime to the gbean. However the ejb containers will need to be
> reinitialized which needs a restart of the openejb container system.
> We can prompt the user to restart the openejb configuration.
>
>> 3. put all the things you want to be able to change into
>> config-substitutions as variables and edit those (in the in-memory map
>> accessible through (????) ArtifactResolver).
>
> This sounds interesting. How can I access this inMemoryMap (not yet
> figured out) and will the changes to the Map be persisted to the
> config.xml file or the config-substitutions.properties file? If not
> the changes will be lost on server shutdown.
>
> The other issue here is that the Mdb Containers are created
> dynamically for each RA. So its not possible to make entries for these
> in config-substitution.properties. However I can add a properties
> attribute to the OpenEJBSystemGBean and during container creation
> check it for custom values. I can then externalize this to
> config-substitution.properties if required.
>
> Regards
> Manu
>

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