2.7.2. JORAM's Resource Adapter tuning

2.7.2. JORAM's Resource Adapter tuning
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2.7.2.1. ManagedConnection Pool

A pool of ManagedConnection is defined for each factory (connection definition) specified in the jonas-ra.xml file. See the pool parameters in the Section 2.7.1.2, “Resource Adapter configuration: ra.xml, jonas-ra.xml”.

2.7.2.2. Session/Thread pool in the JORAM RA

The JORAM RA manages a pool of session/thread for each connection and, by default, the maximum number of parallel sessions is set to 10.

When linked with an message-driven bean, this maximum number of entries in the pool corresponds to the maximum number of messages that can be processed in parallel per message-driven bean. A session is released to the pool just after the message processing (onMessage()). When the maximum is reached, the inquiries for a session creation are blocked until a session becomes available in the pool.

The maxNumberOfWorks property can be set in the message-driven bean standard deployment descriptor. For example, the code below can be added to limit the number of parallel sessions to 100 (default value is 10).

     <activation-config-property>
     <activation-config-property-name>maxNumberOfWorks</activation-config-property-name>
     <activation-config-property-value>100</activation-config-property-value>
     </activation-config-property>

As this parameter set the max number of messages that can be treated simultaneously, the max-cache-size must be set accordingly in the specific deployment descriptor.