Given a list of responsibilities related to session beans, identify those which are the responsibility of the session bean provider and those which are the responsibility of the EJB contai

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Given a list of responsibilities related to session beans, identify those which are the responsibility of the session bean provider and those which are the responsibility of the EJB contai

Given a list of responsibilities related to session beans, identify those which are the responsibility of the session bean provider and those which are the responsibility of the EJB container provider.
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Given a list of responsibilities related to session beans, identify those which are the responsibility of the session bean provider and those which are the responsibility of the EJB container provider.

Bean Provider's responsibility

The session bean provider is responsible for providing the following class files:

  • Session bean class.

  • Session bean’s remote interface and remote home interface, if the session bean provides a remote client view.

  • Session bean’s local interface and local home interface, if the session bean provides a local client view.

Container Provider's responsibility

The container provider is responsible for providing the deployment tools and for managing the session bean instances at runtime.

The deployment tools provided by the container are responsible for the generation of additional classes when the session bean is deployed. The tools obtain the information that they need for generation of the additional classes by introspecting the classes and interfaces provided by the enterprise bean provider and by examining the session bean’s deployment descriptor.

The deployment tools must generate the following classes:

  • A class that implements the session bean’s remote home interface (session EJBHome class).

  • A class that implements the session bean’s remote interface (session EJBObject class).

  • A class that implements the session bean’s local home interface (session EJBLocalHome class).

  • A class that implements the session bean’s local interface (session EJBLocalObject class).

The deployment tools may also generate a class that mixes some container-specific code with the session bean class. This code may, for example, help the container to manage the bean instances at runtime. The tools can use subclassing, delegation, and code generation.

  • The session EJBHome class, which is generated by the deployment tools, implements the session bean’s remote home interface. This class implements the methods of the javax.ejb.EJBHome interface and the create<METHOD> methods specific to the session bean. The implementation of each create<METHOD>(...) method invokes a matching ejbCreate<METHOD>(...) method.

  • The session EJBObject class, which is generated by the deployment tools, implements the session bean’s remote interface. It implements the methods of the javax.ejb.EJBObject interface and the business methods specific to the session bean. The implementation of each business method must activate the instance (if the instance is in the passive state) and invoke the matching business method on the instance.

  • The session EJBLocalHome class, which is generated by the deployment tools, implements the session bean’s local home interface. This class implements the methods of the javax.ejb.EJBLocalHome interface and the create<METHOD> methods specific to the session bean. The implementation of each create<METHOD>(...) method invokes a matching ejbCreate<METHOD>(...) method.

  • The session EJBLocalObject class, which is generated by the deployment tools, implements the session bean’s local interface. It implements the methods of the javax.ejb.EJBLocalObject interface and the business methods specific to the session bean. The implementation of each business method must activate the instance (if the instance is in the passive state) and invoke the matching business method on the instance.

  • The deployment tools are responsible for implementing the handle classes for the session bean’s REMOTE HOME and REMOTE interfaces.

  • The deployment tools are responsible for implementing the class that provides meta-data to the remote client view contract. The class must be a valid RMI Value class and must implement the javax.ejb.EJBMetaData interface.

  • The container must ensure that ONLY ONE thread can be executing an instance at any time. If a client request arrives for an instance while the instance is executing another request, the container may throw the java.rmi.RemoteException to the second request if the client is a remote client, or the javax.ejb.EJBException if the client is a local client.

  • The container MUST follow the rules with respect to transaction scoping, security checking, and exception handling.

  • The container MUST implement the SessionContext.getEJBObject() method such that the bean instance can use the Java language cast to convert the returned value to the session bean’s remote interface type. Specifically, the bean instance does not have to use the PortableRemoteObject.narrow(...) method for the type conversion.

  • Visit http://java.boot.by  for the updates.

   

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Match the correct description about purpose and function to which session bean type they apply: stateless, stateful, or both.  Home Given a list of requirements, identify those which are the requirements for a session bean class, a remote component interface, a remote home interface, create methods, business methods, a local component interface, and a local home interface.

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.