Enum TransactionAttributeType

Enum Constant Detail

• MANDATORY

  public static final TransactionAttributeType MANDATORY

  If a client invokes the enterprise bean's method while the client is associated with a transaction context, the container invokes the enterprise bean's method in the client's transaction context.

  If there is no existing transaction, an exception is thrown.

• REQUIRED

  public static final TransactionAttributeType REQUIRED

  If a client invokes the enterprise bean's method while the client is associated with a transaction context, the container invokes the enterprise bean's method in the client's transaction context.

  If the client invokes the enterprise bean's method while the client is not associated with a transaction context, the container automatically starts a new transaction before delegating a method call to the enterprise bean method.

• REQUIRES_NEW

  public static final TransactionAttributeType REQUIRES_NEW

  The container must invoke an enterprise bean method whose transaction attribute is set to REQUIRES_NEW with a new transaction context.

  If the client invokes the enterprise bean's method while the client is not associated with a transaction context, the container automatically starts a new transaction before delegating a method call to the enterprise bean business method.

  If a client calls with a transaction context, the container suspends the association of the transaction context with the current thread before starting the new transaction and invoking the method. The container resumes the suspended transaction association after the method and the new transaction have been completed.

• SUPPORTS

  public static final TransactionAttributeType SUPPORTS

  If the client calls with a transaction context, the container performs the same steps as described in the REQUIRED case.

  If the client calls without a transaction context, the container performs the same steps as described in the NOT_SUPPORTED case.

  The SUPPORTS transaction attribute must be used with caution. This is because of the different transactional semantics provided by the two possible modes of execution. Only enterprise beans that will execute correctly in both modes should use the SUPPORTS transaction attribute.

• NOT_SUPPORTED

  public static final TransactionAttributeType NOT_SUPPORTED

  The container invokes an enterprise bean method whose transaction attribute NOT_SUPPORTED with an unspecified transaction context.

  If a client calls with a transaction context, the container suspends the association of the transaction context with the current thread before invoking the enterprise bean's business method. The container resumes the suspended association when the business method has completed.

• NEVER

  public static final TransactionAttributeType NEVER

  The client is required to call without a transaction context, otherwise an exception is thrown.

Method Detail

• values

  public static TransactionAttributeType[] values()

  Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

  for (TransactionAttributeType c : TransactionAttributeType.values())
      System.out.println(c);
  

  Returns:

  an array containing the constants of this enum type, in the order they are declared

• valueOf

  public static TransactionAttributeType valueOf(String name)

  Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

  Parameters:

  name - the name of the enum constant to be returned.

  Returns:

  the enum constant with the specified name

  Throws:

  IllegalArgumentException - if this enum type has no constant with the specified name

  NullPointerException - if the argument is null