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  • November 17, 2015

Weblogic 12.2.1 Multitenancy Support for Resource Adapter

One of the key features in WLS 12.2.1 is the multi-tenancy support, you can learn more about its concept in Tim Quinn's blog:Domain Partitions for Multi-tenancy in WebLogic Server. For resource adapter, besides deploying it to domain partition, you can also deploy a resource adapter to partition's resource group or resource group template. This can be done by selecting resource group scope or resource group template scope while deploying resource adapter in console. Following graph shows the deployment page in console. In the example graph, we have a resource group Partition1-rg in Partition1 and a resource group template TestRGT:

Deploy RA to MT in Console

When you select 'Global' scope, the resource adapter will be deployed to domain partition. If selecting 'TestRGT template', the resource adapter will be deployed to resource group template TestRGT, and if Partition1's resource group references TestRGT, the resource adapter will be deployed to Partition1. If selecting 'Partition1-rg in Partition1', the resource adapter will be deployed to Partition1. 

You can learn more about multi-tendency deployment in Hong Zhang's blog: Multi Tenancy Deployment.

If you deploy resource adapters to different partitions, these resources in different partitions will not interfere each other, because:

  1. Resource adapter's JNDI resources in one partition can not be looked up by another partition, you can only lookup resource adapter resources being bound in same partition.
  2. Resource adapter classes packaged in resource adapter archive are loaded by different classloaders when they are deployed to different partitions. You do not need to worry about mistakenly using some resource adapter classes loaded by another partition.
  3. If you somehow get a reference to one of the following resource adapter's resource objects which belongs to another partition, you still can not use it. You will get a exception if you calling some of the methods of that object.
    • javax.resource.spi.work.WorkManager
    • javax.resource.spi.BootstrapContext
    • javax.resource.spi.ConnectionManager
    • javax.validation.Validator
    • javax.validation.ValidatorFactory
    • javax.enterprise.inject.spi.BeanManager
    • javax.resource.spi.ConnectionEventListener

After having resource adapter deployed,  you can access domain resource adapter's runtime mbean through 'ConnectorServiceRuntime' directory under ServerRuntime, using WebLogic Scripting Tool (WLST):

View Connector RuntimeMBean in WLST

In above example, we have a resource adapter named 'jca_ra' deployed in domain partition, so we can see it's runtime mbean under ConnectorServiceRuntime/ConnectorService. jms-internal-notran-adp and jms-internal-xa-adp are also listed here, they are weblogic internal resource adapters.

But how can we monitor resource adapters deployed in partition? they are under PartitionRuntimes:

View MT Connector RuntimeMBean in WLST

In above example, we have a resource adapter named 'jca_ra' deployed in Partition1.

You can also get resource adapter's runtimembean through JMX(see how to access runtimembean using JMX):

      JMXServiceURL serviceURL = new JMXServiceURL("t3", hostname, port,          
      Hashtable h = new Hashtable();
      h.put(Context.SECURITY_PRINCIPAL, user);
      h.put(Context.SECURITY_CREDENTIALS, passwd);
      h.put("jmx.remote.x.request.waiting.timeout", new Long(10000));
      JMXConnector connector = JMXConnectorFactory.connect(serviceURL, h);
      MBeanServerConnection connection = connector.getMBeanServerConnection();
      Set<ObjectName> names = connection.queryNames(new ObjectName(
                            "*:Type=ConnectorComponentRuntime,Name=jca_ra,*"), null);
      for (ObjectName oname : names) {
          Object o = MBeanServerInvocationHandler.newProxyInstance(connection, oname, 
                               ConnectorComponentRuntimeMBean.class, false);

Running above example code in a domain which has a resource adapter named 'jca_ra' deployed to both domain and Partition1, you will get following result:





You can see the connection pool runtime mbean(ConnectorComponentRuntime) of the resource adapter which is deployed to Partition1 has a valid PartitionRuntime attribute. So you can query Partition1's resource adapter's runtime mbean by following code:

connection.queryNames(new ObjectName(

                   "*:Type=ConnectorComponentRuntime,Name=jca_ra,PartitionRuntime=Partition1,*"), null);

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