# Package javax.ejb

Contains the Enterprise JavaBeans classes and interfaces that define the contracts between the enterprise bean and its clients and between the enterprise bean and the EJB container.

See: Description

- Interface Summary
  Interface | Description
  --- | ---
  EJBContext | The EJBContext interface provides an instance with access to the container-provided runtime context of an enterprise bean instance.
  EJBHome | The EJBHome interface must be extended by all enterprise beans' remote home interfaces.
  EJBLocalHome | The EJBLocalHome interface must be extended by all enterprise beans' local home interfaces.
  EJBLocalObject | The EJBLocalObject interface must be extended by all enterprise beans' local interfaces.
  EJBMetaData | The EJBMetaData interface allows a client to obtain the enterprise bean's meta-data information.
  EJBObject | The EJBObject interface is extended by all enterprise beans' remote interfaces.
  EnterpriseBean | The EnterpriseBean interface is a common superinterface for the SessionBean, EntityBean and MessageDrivenBean interfaces.
  EntityBean | The EntityBean interface is implemented by every entity bean class.
  EntityContext | The EntityContext interface provides an instance with access to the container-provided runtime context of an entity bean instance.
  Handle | The Handle interface is implemented by all EJB object handles.
  HomeHandle | The HomeHandle interface is implemented by all home object handles.
  MessageDrivenBean | The MessageDrivenBean interface defines methods that the EJB container uses to notify a message driven bean instance of the instance's life cycle events.
  MessageDrivenContext | The MessageDrivenContext interface provides access to the runtime message-driven context that the container provides for a message-driven bean instance.
  SessionBean | The SessionBean interface defines methods that the EJB container uses to notify a session bean instance of the instance's life cycle events.
  SessionContext | The SessionContext interface provides access to the runtime session context that the container provides for a session bean instance.
  SessionSynchronization | The SessionSynchronization interface allows a stateful session bean instance to be notified by its container of transaction boundaries.
  TimedObject | The `TimedObject` interface contains a callback method that is used to deliver timer expiration notifications.
  Timer | The `Timer` interface contains information about a timer that was created through the EJB Timer Service.
  TimerHandle | The TimerHandle interface allows the bean provider to obtain a serializable timer handle that may be persisted.
  TimerService | The TimerService interface provides enterprise bean components with access to the container-provided Timer Service.

- Class Summary
  Class | Description
  --- | ---
  AsyncResult<V> | Wraps the result of an asynchronous method call as a `Future` object, preserving compatability with the business interface signature.
  ScheduleExpression | A calendar-based timeout expression for an enterprise bean timer.
  TimerConfig | TimerConfig is used to specify additional timer configuration settings during timer creation.

- Enum Summary
  Enum | Description
  --- | ---
  ConcurrencyManagementType | Used to specify the value of the `ConcurrencyManagement` annotation for a singleton session bean.
  LockType | Concurrency lock type for singleton beans with container-managed concurrency.
  TransactionAttributeType | The enum `TransactionAttributeType` is used with the `TransactionAttribute` annotation to specify whether the methods of a session bean or message driven bean are called with a valid transaction context.
  TransactionManagementType | The enum `TransactionManagementType` is used with the `TransactionManagement` annotation to specify whether container-managed or bean-managed transaction management is used.

- Exception Summary
  Exception | Description
  --- | ---
  AccessLocalException | An AccessLocalException is thrown to indicate that the caller does not have permission to call the method.
  ConcurrentAccessException | A ConcurrentAccessException indicates that the client has attempted an invocation on a stateful session bean or singleton bean while another invocation is in progress and such concurrent access is not allowed.
  ConcurrentAccessTimeoutException | This exception indicates that an attempt to concurrently access a stateful session or singleton bean method resulted in a timeout.
  CreateException | The CreateException exception must be included in the throws clauses of all create methods defined in an enterprise bean's home or local home interface.
  DuplicateKeyException | The DuplicateKeyException exception is thrown if an entity EJB object or EJB local object cannot be created because an object with the same key already exists.
  EJBAccessException | This exception indicates that client access to a business method was denied.
  EJBException | The EJBException is thrown to report that the invoked business method or callback method could not be completed because of an unexpected error (e.g.
  EJBTransactionRequiredException | This exception indicates that a request carried a null transaction context, but the target object requires an active transaction.
  EJBTransactionRolledbackException | This exception is thrown to a remote client to indicate that the transaction associated with processing of the request has been rolled back, or marked to roll back.
  FinderException | The FinderException exception must be included in the throws clause of every finder method of an entity bean's home or local home interface.
  IllegalLoopbackException | This exception indicates that an attempt was made to perform an illegal loopback invocation.
  NoMoreTimeoutsException | This exception indicates that a calendar-based timer will not result in any more timeouts.
  NoSuchEJBException | A NoSuchEJBException is thrown if an attempt is made to invoke a business method on a stateful session or singleton object that no longer exists.
  NoSuchEntityException | The NoSuchEntityException exception is thrown by an entity bean instance to its container to report that the invoked business method or callback method could not be completed because of the underlying entity was removed from the database.
  NoSuchObjectLocalException | A NoSuchObjectLocalException is thrown if an attempt is made to invoke a method on a local object (local EJB object or timer) that no longer exists.
  ObjectNotFoundException | The ObjectNotFoundException exception is thrown by a finder or select method to indicate that the specified EJB object or local object does not exist.
  RemoveException | The RemoveException is thrown at an attempt to remove an EJB object or local EJB object when the enterprise bean or the container does not allow the EJB object to be removed.
  TransactionRequiredLocalException | This exception is thrown to a local client to indicate that a request carried a null transaction context, but the target object requires an active transaction.
  TransactionRolledbackLocalException | This exception is thrown to a local client to indicate that the transaction associated with processing of the request has been rolled back, or marked to roll back.

- Annotation Types Summary
  Annotation Type | Description
  --- | ---
  AccessTimeout | Specifies the amount of time in a given time unit that a concurrent access attempt should block before timing out.
  ActivationConfigProperty | Used to provide information to the deployer about the configuration of a message driven bean in its operational environment.
  AfterBegin | Designate a stateful session bean method to receive the after begin session synchronization callback.
  AfterCompletion | Designate a stateful session bean method to receive the after completion session synchronization callback.
  ApplicationException | Applied to an exception to denote that it is an application exception and should be reported to the client directly (i.e., unwrapped).
  Asynchronous | Used to mark a session bean method as an asynchronous method or to designate all business methods of a session bean class as asynchronous.
  BeforeCompletion | Designate a stateful session bean method to receive the before completion session synchronization callback.
  ConcurrencyManagement | Declares a singleton session bean's concurrency management type.
  DependsOn | Used to express an initialization dependency between singleton components.
  EJB | Indicates a dependency on the local, no-interface, or remote view of an Enterprise JavaBean.
  EJBs | Declares multiple `EJB` annotations.
  Init | Designates a method of a session bean that corresponds to a `create<METHOD>` method of an adapted home or local home interface (an interface that adapts an EJB 2.1 or earlier EJBHome or EJBLocalHome client view respectively).
  Local | Declares the local business interface(s) for a session bean.
  LocalBean | Designates that a session bean exposes a no-interface view.
  LocalHome | Declares the local home or adapted local home interface for a session bean.
  Lock | Declares a concurrency lock for a singleton session bean with container managed concurrency.
  MessageDriven | Component-defining annotation for a message driven bean.
  PostActivate | Designates a method to receive a callback after a stateful session bean has been activated.
  PrePassivate | Designates a method to receive a callback before a stateful session bean is passivated.
  Remote | Declares the remote business interface(s) for a session bean.
  RemoteHome | Declares the remote home interface or adapted remote home interface for a session bean.
  Remove | Applied to a business method of a stateful session bean class to indicate to the container that the stateful session bean is to be removed by the container after completion of the method.
  Schedule | Schedule a timer for automatic creation with a timeout schedule based on a cron-like time expression.
  Schedules | Applied to a timer callback method to schedule multiple calendar-based timers for the method.
  Singleton | Component-defining annotation for a singleton session bean.
  Startup | Mark a singleton bean for eager initialization during the application startup sequence.
  Stateful | Component-defining annotation for a stateful session bean.
  StatefulTimeout | Specifies the amount of time a stateful session bean can be idle (not receive any client invocations) before it is eligible for removal by the container.
  Stateless | Component-defining annotation for a stateless session bean.
  Timeout | Designates a method on a stateless session bean class, a singleton session bean class, a message driven bean class, or an EJB 2.x entity bean class that should receive EJB timer expirations for that bean.
  TransactionAttribute | The `TransactionAttribute` annotation specifies whether the container is to invoke a business method within a transaction context.
  TransactionManagement | Specifies whether a session bean or message driven bean has container managed transactions or bean managed transactions.

## Package javax.ejb Description

Contains the Enterprise JavaBeans classes and interfaces that define the contracts between the enterprise bean and its clients and between the enterprise bean and the EJB container.

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