[jira] Commented: (SMX4KNL-106) Support for container level lock to support master/slave deployments

["Guillaume Nodet (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/activemq/browse/SMX4KNL-106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=46123#action_46123 ] 

Guillaume Nodet commented on SMX4KNL-106:
-----------------------------------------

By default, a file based locking mechanism is used.  There is an interface that can be implemented to allow other locking mechanisms such as JDBC.  This would require setting a system property for the class name of the lock (it can be done in etc/system.properties) and changing the shell script to add the needed jars to the boot classpath.

> Support for container level lock to support master/slave deployments
> --------------------------------------------------------------------
>
>                 Key: SMX4KNL-106
>                 URL: https://issues.apache.org/activemq/browse/SMX4KNL-106
>             Project: ServiceMix Kernel
>          Issue Type: Improvement
>    Affects Versions: 1.0.0
>         Environment: 4.x
>            Reporter: Dave Stanley
>            Assignee: Guillaume Nodet
>             Fix For: 1.1.0
>
>
> Using an approach similar to ServiceMix 3,  its possible to use ActiveMQ's persistence adapter locking to setup master (ACTIVE) and slave (STANDBY) container instances. This requires changing the manifest in the bundle jar generated for the ActiveMQ broker, to set "create-asynchronously:=false" and setting the run level for activemq such that its the first application bundle deployed, e.g.
> {code}
> Manifest-Version: 2
> Import-Package: javax.transaction,org.apache.activemq,org.apache.activ
>  emq.pool,org.springframework.beans.factory.config
> Spring-Context: *;publish-context:=false;create-asynchronously:=false
> Bundle-SymbolicName: localhost-broker.xml
> Bundle-Version: 0.0.0
> DynamicImport-Package: *
> {code}   
> While this handles HA for message's flowing through the container, it would be nice if the locking could be done at the container level. 
> This is an enhancement request to support locking the slave and master on the same <ESB>/data directory. Ideally the locking should be handled by a lock adapter such that both file level & jdbc/DB based locking can be supported.

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