## org.springframework.transaction.annotation
Enum Propagation

    java.lang.Object
      java.lang.Enum<Propagation>
          org.springframework.transaction.annotation.Propagation

All Implemented Interfaces:
  Serializable, Comparable<Propagation>

    public enum Propagation

extends Enum<Propagation>

Enumeration that represents transaction propagation behaviors for use with the JDK 1.5+ transaction annotation, corresponding to the TransactionDefinition interface.

Since:
  1.2
Author:
  Colin Sampaleanu, Juergen Hoeller
See Also:
  `Transactional`, `TransactionDefinition`

Enum Constant Summary
`MANDATORY` Support a current transaction, throw an exception if none exists.
`NESTED` Execute within a nested transaction if a current transaction exists, behave like PROPAGATION_REQUIRED else.
`NEVER` Execute non-transactionally, throw an exception if a transaction exists.
`NOT_SUPPORTED` Execute non-transactionally, suspend the current transaction if one exists.
`REQUIRED` Support a current transaction, create a new one if none exists.
`REQUIRES_NEW` Create a new transaction, suspend the current transaction if one exists.
`SUPPORTS` Support a current transaction, execute non-transactionally if none exists.

Method Summary
`int` `value()`
`static Propagation` `valueOf(String name)` Returns the enum constant of this type with the specified name.
`static Propagation[]` `values()` Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
`clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

Methods inherited from class java.lang.Object
`getClass, notify, notifyAll, wait, wait, wait`

Enum Constant Detail

### REQUIRED

    public static final Propagation REQUIRED

  Support a current transaction, create a new one if none exists. Analogous to EJB transaction attribute of the same name.

  This is the default setting of a transaction annotation.

### SUPPORTS

    public static final Propagation SUPPORTS

  Support a current transaction, execute non-transactionally if none exists. Analogous to EJB transaction attribute of the same name.

  Note: For transaction managers with transaction synchronization, PROPAGATION_SUPPORTS is slightly different from no transaction at all, as it defines a transaction scopp that synchronization will apply for. As a consequence, the same resources (JDBC Connection, Hibernate Session, etc) will be shared for the entire specified scope. Note that this depends on the actual synchronization configuration of the transaction manager.

  See Also:
    `AbstractPlatformTransactionManager.setTransactionSynchronization(int)`

### MANDATORY

    public static final Propagation MANDATORY

  Support a current transaction, throw an exception if none exists. Analogous to EJB transaction attribute of the same name.

### REQUIRES_NEW

    public static final Propagation REQUIRES_NEW

  Create a new transaction, suspend the current transaction if one exists. Analogous to EJB transaction attribute of the same name.

  Note: Actual transaction suspension will not work on out-of-the-box on all transaction managers. This in particular applies to JtaTransactionManager, which requires the `javax.transaction.TransactionManager` to be made available it to it (which is server-specific in standard J2EE).

  See Also:
    `JtaTransactionManager.setTransactionManager(javax.transaction.TransactionManager)`

### NOT_SUPPORTED

    public static final Propagation NOT_SUPPORTED

  Execute non-transactionally, suspend the current transaction if one exists. Analogous to EJB transaction attribute of the same name.

  Note: Actual transaction suspension will not work on out-of-the-box on all transaction managers. This in particular applies to JtaTransactionManager, which requires the `javax.transaction.TransactionManager` to be made available it to it (which is server-specific in standard J2EE).

  See Also:
    `JtaTransactionManager.setTransactionManager(javax.transaction.TransactionManager)`

### NEVER

    public static final Propagation NEVER

  Execute non-transactionally, throw an exception if a transaction exists. Analogous to EJB transaction attribute of the same name.

### NESTED

    public static final Propagation NESTED

  Execute within a nested transaction if a current transaction exists, behave like PROPAGATION_REQUIRED else. There is no analogous feature in EJB.

  Note: Actual creation of a nested transaction will only work on specific transaction managers. Out of the box, this only applies to the JDBC DataSourceTransactionManager when working on a JDBC 3.0 driver. Some JTA providers might support nested transactions as well.

  See Also:
    `DataSourceTransactionManager`

Method Detail

### values

    public static Propagation[] 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 (Propagation c : Propagation.values())
          System.out.println(c);

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

### valueOf

    public static Propagation 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

### value

    public int value()

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