Control MDB maxSession dynamically/programmatically?

[kennardconsulting]

Hi guys,

I have recently upgraded from JBoss Messaging to HornetQ and I'm very impressed. I'm now interested in trying to squeeze extra performance out of our server cluster!

Is it possible to dynamically/programmatically adjust the MDB 'maxSession' value we are currently setting in ejb-jar.xml's <message-driven> section? I would like to be able to configure it based on, say, number of CPU cores or available memory or time of day.

Regards,

Richard.

[clebert.suconic]

That's an EJB question. But I don't think so.

[kennardconsulting]

Clebert,

Okay cool. It appears I can get 'close enough' by using some JBoss EL in ejb-jar.xml:

<message-driven>

<ejb-name>LongRunningProcessConsumerBean</ejb-name>

<messaging-type>javax.jms.MessageListener</messaging-type>

<message-destination-type>javax.jms.Queue</message-destination-type>

<activation-config>

<activation-config-property>

<activation-config-property-name>maxSession</activation-config-property-name>

<activation-config-property-value>${some.command.line.variable:2}</activation-config-property-value>

</activation-config-property>

</activation-config>

</message-driven>

And then some Unix scripting to set that variable during run.sh.

Regards,

Richard.