Chapter 8. Entity Beans

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Chapter 5. Client View of an Entity Identify correct and incorrect statements about the Application Assembler's responsibilities, including the use of deployment descriptor elements related to transactions and the identifica Given a list of responsibilities, identify whose which are the Container's with respect to transactions, including the handling of getRollbackOnly, setRollbackOnly, getUserTransacti EJB Transactional Attributes Chapter 11. Transactions Given a list of scenarios, identify which will result in an ejbRemove method not being called on a bean instance. 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 methods for a stateful or stateless session bean class, define which of the following operations can be performed from each of those methods: SessionContext interface metho Chapter 4. Session Bean Life Cycle Identify correct and incorrect statements or examples about the client view of a session bean's local and remote component interfaces. 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 sessio Match the correct description about purpose and function to which session bean type they apply: stateless, stateful, or both. Chapter 14. Security Management Given a security-related deployment descriptor tag, identify correct and incorrect statements and code related to that tag. Given a list of responsibilities, identify which belong to the deployer, bean provider, application assembler, container provider, system administrator, or any combination. From a list of responsibilities, identify which belong to the application assembler, bean provider, deployer, container provider, or system administrator. Part I. Exam Objectives Preface Identify the interfaces and methods a JMS message-driven bean must implement. Identify the use and behavior of the MessageDrivenContext interface methods. SCBCD Study Guide 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 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. Identify correct and incorrect statements or examples about application exceptions and system exceptions in entity beans, session beans, and message-driven beans. Identify correct and incorrect statements or examples about the client's view of exceptions received from an enterprise bean invocation. Identify correct and incorrect statements or examples about an entity bean's primary key and object identity. 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 Chapter 8. Entity Beans Chapter 13. Enterprise Bean Environment Chapter 2. Client View of a Session Bean Match EJB roles with the corresponding description of the role's responsibilities, where the description may include deployment descriptor information. Given a list, identify which are requirements for an EJB-jar file. Identify correct and incorrect statements or examples about the client view of a entity bean's remote component interface (EJBObject). Identify correct and incorrect conditional expressions, BETWEEN expressions, IN expressions, LIKE expressions, and comparison expressions. Identify correct and incorrect statements or examples about the purpose and use of EJB QL. Chapter 9. EJB-QL Identify correct and incorrect statements or examples about EJB programming restrictions. Chapter 1. EJB Overview Identify EJB 2.0 container requirements. Identify correct and incorrect statements or examples about the client view of an entity bean's local component interface (EJBLocalObject). Chapter 12. Exceptions 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 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 Chapter 10. Message-Driven Bean Component Contract Given a code listing, determine whether it is a legal and appropriate way to programmatically access a caller's security context. From a list, identify the responsibility of the container for a CMP entity bean, including but not limited to: setEntityContext, unsetEntityContext, ejbCreate, ejbPostCreate, ejbActi Identify correct and incorrect statements or examples about the rules and semantics for relationship assignment and relationship updating in a CMP bean. Chapter 7. CMP Entity Bean Life Cycle 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 Identify correctly-implemented deployment descriptor elements for a CMP bean (including container-managed relationships).
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Chapter 8. Entity Beans

From a list of behaviors, match them with the appropriate EntityContext method responsible for that behavior.

A CONTAINER provides the entity bean instances with an EntityContext, which gives the entity bean instance access to the instance’s context maintained by the container. The EntityContext interface has the following methods:

  • The getEJBObject method returns the entity bean’s REMOTE [component] interface.

  • The getEJBHome method returns the entity bean’s REMOTE HOME interface.

  • The getEJBLocalObject method returns the entity bean’s LOCAL [component] interface.

  • The getEJBLocalHome method returns the entity bean’s LOCAL HOME interface.

  • The getCallerPrincipal method returns the java.security.Principal that identifies the invoker of the bean instance’s EJB object.

  • The isCallerInRole method tests if the entity bean instance’s caller has a particular role.

  • The setRollbackOnly method allows the instance to mark the current transaction such that the only outcome of the transaction is a rollback (EntityBeans support ONLY CMT).

  • The getRollbackOnly method allows the instance to test if the current transaction has been marked for rollback. (EntityBeans support ONLY CMT).

  • The getPrimaryKey method returns the entity bean’s primary key.

  • The getUserTransaction method returns the javax.transaction.UserTransaction interface. Entity bean instances MUST NOT call this method. It is derived from EJBContext interface, which is parent for contexts for all 3 types of EJB, but it is used ONLY with BMT in Session Beans and Messages Driven Beans.

public interface EntityContext extends EJBContext {
	EJBLocalObject getEJBLocalObject() throws IllegalStateException;
	EJBObject getEJBObject() throws IllegalStateException;
	Object getPrimaryKey() throws IllegalStateException;
}
					
public interface EJBContext {
	EJBHome getEJBHome();
	EJBLocalHome getEJBLocalHome();
	Principal getCallerPrincipal();
	boolean isCallerInRole(String roleName);
	UserTransaction getUserTransaction() throws IllegalStateException;
	void setRollbackOnly() throws IllegalStateException;
	boolean getRollbackOnly() throws IllegalStateException;
}
					

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Chapter 8. Entity Beans

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