OWSM Offline Agents

Per architecture OWSM Agents intercepts the requerst, calls the policy manager to retrieve the policy and then executes those policy where agent is installed. It introduces lot of traffic on policy manager. Policies are stored in database and policy manager is single point of contant for them.

Although we can break this dependency by offline agent installation, we can export all the policy from database as an XML file and provide that XML file to OWSM agent during the time of installation. In this case, owsm agents will look into the file, and wouldn't contact policy manager. We can update this file and policies at run time without bouncing the server.

Here are steps I followed:

Step 1: Create a client agent using OWSM ccore User Interface and defined the policies as I would for any other client agent.

Step 2: I expored those policies to an XML file using "save" button:

Step 3: Now it is time to install this agent with policy file already exported. Client agent installation is explained pretty well in http://www.oracle.com/technology/obe/fusion_middleware/owsm/index.html , but here I will just provide required informaiton to make offline.

I provided following agent.properties and then used "wsmadmin installAgent" to install the client agent.

agent.componentType=OC4JClientInterceptor
agent.containerType=OC4J
agent.containerVersion=10.1.3
client.home=d:/soasuite/j2ee/oc4j_soa
agent.component.id=C0003007
agent.policymanager.enabled=false
agent.policySet.file=D:/temp/owsm/OfflineAgentPolicySet.xml

Here I had to provide the policy file and disable the policy manger.

Step 4: Final testing: After this, I just create two BPEL process Calle and Caller to test my client agent, and it worked simply great. Upon changing the file name my client agent didn't work and upon updating the file client agent picked up new changes. It worked..

You can download agent.properties, policy file and test code from here.