JBAS5.1: ${} deployment notation - Newbie information reques

[simon_temple]

Can anyone point me at information on the ${} notation used throught the JBAS5.1 deployment configuration files?

Example: jgroups-channelfactory-stacks.xml

mcast_port="${jboss.jgroups.udp_async.mcast_port:45689}"

So where do I specify a value for jboss.jgroups.udp_async.mcast_port to override the default value?

Thanks

[peterj]

The jboss.jgroups.udp_async.mcast_port is a system property, you can set it on the command line:

run -Djboss.jgroups.udp_async.mcast_port=12345

[peterj]

The general syntax is:

${<system-property>[:<default-value>]}

As far as I know, it applies to all configuration files.

[simon_temple]

Thanks Peter.

But that's potentially a huge number of system properties to be set via a command line if you heavily customise JBAS configuration.

I could exceed the command line length on some operating systems...

Shame you can't specify something like a properties bundle to the deployers.

[peterj]

Then use the properties service - it lets you identify a file containing system properties - and you can even specify the filename as a property. Look at server/default/deploy/properties-service.xml.

[peterj]

Oh, and one other thought - the correct way to specify different port number is to use the binding service. See server/default/conf/bindingservice.beans/META-INF/bindings-jboss-beans.xml. This file defines groups of port bindings that you can select from the command line like this:

run -Djboss.service.binding.set=xxx

where xxx is the desired configuration, such as ports-01.

The predefined binding set includes the default bindings and the others are incremental in nature (example: port = default port + 100). But you can make a copy of the default port set and specify custom binding and then use that set.

[simon_temple]

Thanks again Peter.

...feeling a little embarrassed now I found further details of this in the book JBOSS in Action. A book I'm finding really useful BTW, although it looks like I need to study it some more ;-)