[mod_cluster-dev] Enabling mod_cluster by default in AS6

[Bela Ban]

Paul Ferraro wrote:
>> I assume you're referring to the *factory*, so would the property be
>> something like -Djboss.mod_cluster.jvmRoute.factory=CLASSNAME ?
>
> No - the jvm route itself.
> e.g. -Djboss.mod_cluster.jvmRoute=node1
>
> Implementation-wise, the default JvmRouteFactory is:
> new SystemPropertyJvmRouteFactory(new UUIDJvmRouteFactory(),
> "jboss.mod_cluster.jvmRoute");
>
> So, it returns the given system property, if defined; or if not, a UUID.

Ah, OK. Is the factory pluggable, can I replace it with my own impl ?

> If you want to override the factory itself, you would modify the
> jvmRouteFactory property of the ModClusterConfig bean within
> mod_cluster-jboss-beans.xml.
> e.g.
> <bean name="ModClusterConfig" class="...">
> ...
> <property name="jvmRouteFactory">
> <!-- Generates jvm route as: bind-address:port:engine-name -->
> <bean class="org.jboss.mod_cluster.SimpleJvmRouteFactory"/>
> </property>
> ...
> </bean>


Got it, answers my question above


>
>>>> 2. mod-cluster.sar:
>>>> 1. Set the proxy list (jboss.mod_cluster.proxyList) [optional
>>>> if IP multicasting works, as advertise is enabled by default]
>>> Advertise is not enabled by default - in order to minimize jboss's
>>> default port footprint. Advertise can be enabled via a system property.
>>>
>>> So, in summary, the servers just need to be started with either:
>>> -Djboss.mod_cluster.advertise=true
>>> or
>>> -Djboss.mod_cluster.proxyList=....
>> OK. In order to create virtual images for GoGrid, EC2 and Rackspace, I
>> want to avoid using system properties as much as possible. So jvmRoutes
>> need to be either hard coded, or my startup script (/etc/init.d/jboss)
>> will have to provide unique values for them, e.g. via uuidgen.
>
> You don't need to use a system property to get unique auto-generated jvm
> routes by default. See above.

OK, good.


-- 
Bela Ban
Lead JGroups / Clustering Team
JBoss