Identify the use and the behavior of the ejbPassivate method in a session bean, including the responsibilities of both the container and the bean provider.

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Identify the use and the behavior of the ejbPassivate method in a session bean, including the responsibilities of both the container and the bean provider.

Identify the use and the behavior of the ejbPassivate method in a session bean, including the responsibilities of both the container and the bean provider.
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Identify the use and the behavior of the ejbPassivate method in a session bean, including the responsibilities of both the container and the bean provider.

Bean Provider's responsibility

Passivation is performed only for STATEFUL session beans. The Bean Provider is required to ensure that the ejbPassivate method leaves the instance fields ready to be serialized by the Container. The objects that are assigned to the instance’s non-transient fields after the ejbPassivate method completes must be one of the following:

  • A serializable object.

  • A null.

  • An enterprise bean’s remote interface reference.

  • An enterprise bean’s remote home interface reference.

  • An entity bean’s local interface reference.

  • An entity bean’s local home interface reference.

  • A reference to the SessionContext object.

  • A reference to the environment naming context (java:comp/env JNDI)

  • A reference to the UserTransaction interface.

  • A reference to a resource manager connection factory.

  • An object that is not directly serializable, because it contains references on "non-serializable" objects mentioned above.

Bean Provider must close all JDBC™ connections in ejbPassivate and assign the instance’s fields storing the connections to null.

The Bean Provider must assume that the content of transient fields MAY be lost between the ejbPassivate and ejbActivate notifications.

Container's responsibility

The container performs the Java programming language Serialization (or its equivalent) of the instance’s state after it invokes the ejbPassivate method on the instance.

The container must be able to properly save and restore the reference to the home and component interfaces of the enterprise beans stored in the instance’s state even if the classes that implement the object references are not serializable.

If the session bean instance stores in its conversational state an object reference to the javax.ejb.SessionContext interface, java:comp/env JNDI context or UserTransaction interface, the container must be able to save and restore the object reference across the instance’s passivation.

The container may destroy a session bean instance if the instance does not meet the requirements for serialization after ejbPassivate.

While the container is not required to use the Serialization protocol for the Java programming language to store the state of a passivated session instance, it must achieve the equivalent result. The one exception is that containers are NOT REQUIRED to reset the value of transient fields during activation (as opposed to pure Serialization, which GUARANTEES that transient variables will come back with default values for that type).

Passivation typically happens spontaneously based on the needs of the container. It happens just BEFORE writing state to secondary storage.

Activation typically occurs when a client calls a method. It happens just AFTER reading state from secondary storage.

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Chapter 3. Session Bean Component Contract Home Identify the interface and method for each of the following: retrieve the session bean's remote home interface, retrieve the session bean's local component interface, determine if the session bean's caller has a particular role, allow the instance to mark the current transaction as a rollback, retrieve the UserTransaction interface, prepare the instance for reuse following passivation, release resources prior to removal, identify the invoker of the bean instance's component interface, be notified that a new transaction has begun, and be notified that the current transaction has completed.

Tutorials

  1. Appendix A. First Appendix
  2. Second Section
  3. Third Section
  4. Part II. Appendixes
  5. From a list, identify the responsibility of the bean provider and the responsibility of the container provider for a message-driven bean.
  6. Chapter 6. Component Contract for Container-Managed Persistence (CMP)
  7. Identify correct and incorrect statements or examples about persistent relationships, remove protocols, and about the abstract schema type of a CMP entity bean.
  8. Identify the interfaces and methods a CMP entity bean must and must not implement.
  9. Match the name with a description of purpose or functionality, for each of the following deployment descriptor elements: ejb-name, abstract-schema-name, ejb-relation, ejb-relat
  10. Identify correctly-implemented deployment descriptor elements for a CMP bean (including container-managed relationships).
  11. From a list, identify the purpose, behavior, and responsibilities of the bean provider for a CMP entity bean, including but not limited to: setEntityContext, unsetEntityContext, ejbC
  12. Chapter 7. CMP Entity Bean Life Cycle
  13. Identify correct and incorrect statements or examples about the rules and semantics for relationship assignment and relationship updating in a CMP bean.
  14. From a list, identify the responsibility of the container for a CMP entity bean, including but not limited to: setEntityContext, unsetEntityContext, ejbCreate, ejbPostCreate, ejbActi
  15. Given a code listing, determine whether it is a legal and appropriate way to programmatically access a caller's security context.
  16. Chapter 10. Message-Driven Bean Component Contract
  17. Identify correct and incorrect statements about the purpose and use of the deployment descriptor elements for environment entries, EJB references, and resource manager connection factory r
  18. Identify the use and the behavior of the ejbPassivate method in a session bean, including the responsibilities of both the container and the bean provider.
  19. Chapter 12. Exceptions
  20. Identify correct and incorrect statements or examples about the client view of an entity bean's local component interface (EJBLocalObject).
  21. Identify EJB 2.0 container requirements.
  22. Chapter 1. EJB Overview
  23. Identify correct and incorrect statements or examples about EJB programming restrictions.
  24. Chapter 9. EJB-QL
  25. Identify correct and incorrect statements or examples about the purpose and use of EJB QL.
  26. Identify correct and incorrect conditional expressions, BETWEEN expressions, IN expressions, LIKE expressions, and comparison expressions.
  27. Identify correct and incorrect statements or examples about the client view of a entity bean's remote component interface (EJBObject).
  28. Given a list, identify which are requirements for an EJB-jar file.
  29. Match EJB roles with the corresponding description of the role's responsibilities, where the description may include deployment descriptor information.
  30. Chapter 2. Client View of a Session Bean
  31. Chapter 13. Enterprise Bean Environment
  32. Chapter 8. Entity Beans
  33. Identify the use, syntax, and behavior of, the following entity bean home method types, for Container-Managed Persistence (CMP); finder methods, create methods, remove methods, and home me
  34. Identify correct and incorrect statements or examples about an entity bean's primary key and object identity.
  35. Identify correct and incorrect statements or examples about the client's view of exceptions received from an enterprise bean invocation.
  36. Identify correct and incorrect statements or examples about application exceptions and system exceptions in entity beans, session beans, and message-driven beans.
  37. Given a particular method condition, identify the following: whether an exception will be thrown, the type of exception thrown, the container's action, and the client's view.
  38. Given a list of responsibilities related to exceptions, identify those which are the bean provider's, and those which are the responsibility of the container provider. Be prepared to recog
  39. SCBCD Study Guide
  40. Identify the use and behavior of the MessageDrivenContext interface methods.