OpenEJB/TomEE custom DataSource JTA integration

OpenEJB and TomEE provide default factories for datasources allowing to define easily by configuration JTA or not datasource pooled by a configurable pool implementation (dbcp, tomcat-jdbc, bonecp…).

But sometimes it is not enough. You want to take the control of the datasource (if you want to use native driver pooling, read the config from a custom source etc…).

For non jta datasource no issue, but for JTA you need to know some internals.

To avoid it we added in OpenEJB a new factory usable as resource to let you define custom JTA datasource.

First define your datasource as you want. For instance:

<Resource id="myDs"
          type="DataSource"
          class-name="org.superbiz.MyDataSourceFactory"
          factory-name="create">
   url = ...
   anotherAttribute = ...
</Resource>

Then wrap it using new JTADataSourceWrapperFacory:

<Resource id="myJTADataSource"
          type="DataSource"
          class-name="org.apache.openejb.resource.jdbc.managed.JTADataSourceWrapperFactory"
          factory-name="create"> 
   Delegate = myDs 
</Resource> 

Then simply use myJTADataSource instead of myDs in your application (jpa, @Resource…)

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