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## org.springframework.jms.listener.endpoint
Class DefaultJmsActivationSpecFactory

    java.lang.Object
      org.springframework.jms.listener.endpoint.StandardJmsActivationSpecFactory
          org.springframework.jms.listener.endpoint.DefaultJmsActivationSpecFactory

All Implemented Interfaces:
  JmsActivationSpecFactory

    public class DefaultJmsActivationSpecFactory

extends StandardJmsActivationSpecFactory

Default implementation of the `JmsActivationSpecFactory` interface. Supports the standard JMS properties as defined by the JMS 1.5 specification, as well as Spring's extended "maxConcurrency" and "prefetchSize" settings through autodetection of well-known vendor-specific provider properties.

An ActivationSpec factory is effectively dependent on the concrete JMS provider, e.g. on ActiveMQ. This default implementation simply guesses the ActivationSpec class name from the provider's class name ("ActiveMQResourceAdapter" -> "ActiveMQActivationSpec" in the same package, or "ActivationSpecImpl" in the same package as the ResourceAdapter class), and populates the ActivationSpec properties as suggested by the JCA 1.5 specification (Appendix B). Specify the 'activationSpecClass' property explicitly if these default naming rules do not apply.

Note: ActiveMQ, JORAM and WebSphere are supported in terms of extended settings (through the detection of their bean property naming conventions). The default ActivationSpec class detection rules may apply to other JMS providers as well.

Thanks to Agim Emruli and Laurie Chan for pointing out WebSphere MQ settings and contributing corresponding tests!

Since:
  2.5
Author:
  Juergen Hoeller
See Also:
  `StandardJmsActivationSpecFactory.setActivationSpecClass(java.lang.Class)`

Field Summary
`protected Log` | `logger` Logger available to subclasses

Constructor Summary
`DefaultJmsActivationSpecFactory()`

Method Summary
`protected void` | `applyAcknowledgeMode(BeanWrapper bw, int ackMode)` This implementation maps `SESSION_TRANSACTED` onto an ActivationSpec property named "useRAManagedTransaction", if available (following ActiveMQ's naming conventions).
`protected Class` | `determineActivationSpecClass(ResourceAdapter adapter)` This implementation guesses the ActivationSpec class name from the provider's class name: e.g.
`protected void` | `populateActivationSpecProperties(BeanWrapper bw, JmsActivationSpecConfig config)` This implementation supports Spring's extended "maxConcurrency" and "prefetchSize" settings through detecting corresponding ActivationSpec properties: "maxSessions"/"maxNumberOfWorks" and "maxMessagesPerSessions"/"maxMessages", respectively (following ActiveMQ's and JORAM's naming conventions).

Methods inherited from class org.springframework.jms.listener.endpoint.StandardJmsActivationSpecFactory
`createActivationSpec, setActivationSpecClass, setDefaultProperties, setDestinationResolver`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### logger

    protected final Log logger

  Logger available to subclasses

Constructor Detail

### DefaultJmsActivationSpecFactory

    public DefaultJmsActivationSpecFactory()

Method Detail

### determineActivationSpecClass

    protected Class determineActivationSpecClass(ResourceAdapter adapter)

  This implementation guesses the ActivationSpec class name from the provider's class name: e.g. "ActiveMQResourceAdapter" -> "ActiveMQActivationSpec" in the same package, or a class named "ActivationSpecImpl" in the same package as the ResourceAdapter class.

  Overrides:
    `determineActivationSpecClass` in class `StandardJmsActivationSpecFactory`
  Parameters:
    `adapter` - the ResourceAdapter to check
  Returns:
    the corresponding ActivationSpec class, or `null` if not determinable
  See Also:
    `StandardJmsActivationSpecFactory.setActivationSpecClass(java.lang.Class)`

### populateActivationSpecProperties

    protected void populateActivationSpecProperties(BeanWrapper bw,
                                                    JmsActivationSpecConfig config)

  This implementation supports Spring's extended "maxConcurrency" and "prefetchSize" settings through detecting corresponding ActivationSpec properties: "maxSessions"/"maxNumberOfWorks" and "maxMessagesPerSessions"/"maxMessages", respectively (following ActiveMQ's and JORAM's naming conventions).

  Overrides:
    `populateActivationSpecProperties` in class `StandardJmsActivationSpecFactory`
  Parameters:
    `bw` - the BeanWrapper wrapping the ActivationSpec object
    `config` - the configured object holding common JMS settings

### applyAcknowledgeMode

    protected void applyAcknowledgeMode(BeanWrapper bw,
                                        int ackMode)

  This implementation maps `SESSION_TRANSACTED` onto an ActivationSpec property named "useRAManagedTransaction", if available (following ActiveMQ's naming conventions).

  Overrides:
    `applyAcknowledgeMode` in class `StandardJmsActivationSpecFactory`
  Parameters:
    `bw` - the BeanWrapper wrapping the ActivationSpec object
    `ackMode` - the configured acknowledge mode (according to the constants in `Session`
  See Also:
    `Session.AUTO_ACKNOWLEDGE`, `Session.DUPS_OK_ACKNOWLEDGE`, `Session.CLIENT_ACKNOWLEDGE`, `Session.SESSION_TRANSACTED`

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