org.springframework.ejb.support

## Class AbstractMessageDrivenBean

- java.lang.Object
- - org.springframework.ejb.support.AbstractEnterpriseBean
  - - org.springframework.ejb.support.AbstractMessageDrivenBean

- All Implemented Interfaces:
    Serializable, EnterpriseBean, MessageDrivenBean
  Direct Known Subclasses:
    AbstractJmsMessageDrivenBean

  Deprecated.
  as of Spring 3.2, in favor of implementing EJBs in EJB 3 style

      @Deprecated
      public abstract class AbstractMessageDrivenBean
      extends AbstractEnterpriseBean
      implements MessageDrivenBean

  Convenient base class for EJB 2.x MDBs. Doesn't require JMS, as EJB 2.1 MDBs are no longer JMS-specific; see the `AbstractJmsMessageDrivenBean` subclass.

  This class ensures that subclasses have access to the MessageDrivenContext provided by the EJB container, and implement a no-arg `ejbCreate()` method as required by the EJB specification. This `ejbCreate()` method loads a BeanFactory, before invoking the `onEjbCreate()` method, which is supposed to contain subclass-specific initialization.

  NB: We cannot use final methods to implement EJB API methods, as this violates the EJB specification. However, there should be no need to override the `setMessageDrivenContext` or `ejbCreate()` methods.

  Author:
    Rod Johnson
  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected Log` | `logger` Deprecated. Logger available to subclasses

    - ### Fields inherited from class org.springframework.ejb.support.AbstractEnterpriseBean

      `BEAN_FACTORY_PATH_ENVIRONMENT_KEY`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `AbstractMessageDrivenBean()` Deprecated.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `ejbCreate()` Deprecated. Lifecycle method required by the EJB specification but not the MessageDrivenBean interface.
    `protected MessageDrivenContext` | `getMessageDrivenContext()` Deprecated. Convenience method for subclasses to use.
    `protected abstract void` | `onEjbCreate()` Deprecated. Subclasses must implement this method to do any initialization they would otherwise have done in an `ejbCreate()` method.
    `void` | `setMessageDrivenContext(MessageDrivenContext messageDrivenContext)` Deprecated. Required lifecycle method.

    - ### Methods inherited from class org.springframework.ejb.support.AbstractEnterpriseBean

      `ejbRemove, getBeanFactory, onEjbRemove, setBeanFactoryLocator, setBeanFactoryLocatorKey`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

    - ### Methods inherited from interface javax.ejb.MessageDrivenBean

      `ejbRemove`

- - ### Field Detail

    - #### logger

          protected final Log logger

      Deprecated.
      Logger available to subclasses

  - ### Constructor Detail

    - #### AbstractMessageDrivenBean

          public AbstractMessageDrivenBean()

      Deprecated.

  - ### Method Detail

    - #### setMessageDrivenContext

          public void setMessageDrivenContext(MessageDrivenContext messageDrivenContext)

      Deprecated.
      Required lifecycle method. Sets the MessageDriven context.
      Specified by:
        `setMessageDrivenContext` in interface `MessageDrivenBean`
      Parameters:
        `messageDrivenContext` - MessageDrivenContext

    - #### getMessageDrivenContext

          protected final MessageDrivenContext getMessageDrivenContext()

      Deprecated.
      Convenience method for subclasses to use.
      Returns:
        the MessageDrivenContext passed to this EJB by the EJB container

    - #### ejbCreate

          public void ejbCreate()

      Deprecated.
      Lifecycle method required by the EJB specification but not the MessageDrivenBean interface. This implementation loads the BeanFactory.

      Don't override it (although it can't be made final): code initialization in onEjbCreate(), which is called when the BeanFactory is available.

      Unfortunately we can't load the BeanFactory in setSessionContext(), as resource manager access isn't permitted and the BeanFactory may require it.

    - #### onEjbCreate

          protected abstract void onEjbCreate()

      Deprecated.
      Subclasses must implement this method to do any initialization they would otherwise have done in an `ejbCreate()` method. In contrast to `ejbCreate()`, the BeanFactory will have been loaded here.

      The same restrictions apply to the work of this method as to an `ejbCreate()` method.