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## org.springframework.transaction.support
Class TransactionSynchronizationAdapter

    java.lang.Object
      org.springframework.transaction.support.TransactionSynchronizationAdapter

All Implemented Interfaces:
  Ordered, TransactionSynchronization

Direct Known Subclasses:
  SpringLobCreatorSynchronization

    public abstract class TransactionSynchronizationAdapter

extends Object
implements TransactionSynchronization, Ordered

Simple `TransactionSynchronization` adapter containing empty method implementations, for easier overriding of single methods.

Also implements the `Ordered` interface to enable the execution order of synchronizations to be controlled declaratively. The default `order` is `Ordered.LOWEST_PRECEDENCE`, indicating late execution; return a lower value for earlier execution.

Since:
  22.01.2004
Author:
  Juergen Hoeller

Field Summary

Fields inherited from interface org.springframework.transaction.support.TransactionSynchronization
`STATUS_COMMITTED, STATUS_ROLLED_BACK, STATUS_UNKNOWN`

Fields inherited from interface org.springframework.core.Ordered
`HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE`

Constructor Summary
`TransactionSynchronizationAdapter()`

Method Summary
`void` | `afterCommit()` Invoked after transaction commit.
`void` | `afterCompletion(int status)` Invoked after transaction commit/rollback.
`void` | `beforeCommit(boolean readOnly)` Invoked before transaction commit (before "beforeCompletion").
`void` | `beforeCompletion()` Invoked before transaction commit/rollback.
`int` | `getOrder()` Return the order value of this object, with a higher value meaning greater in terms of sorting.
`void` | `resume()` Resume this synchronization.
`void` | `suspend()` Suspend this synchronization.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### TransactionSynchronizationAdapter

    public TransactionSynchronizationAdapter()

Method Detail

### getOrder

    public int getOrder()

  Description copied from interface: `Ordered`
  Return the order value of this object, with a higher value meaning greater in terms of sorting.

  Normally starting with 0 or 1, with `Ordered.LOWEST_PRECEDENCE` indicating greatest. Same order values will result in arbitrary positions for the affected objects.

  Higher value can be interpreted as lower priority, consequently the first object has highest priority (somewhat analogous to Servlet "load-on-startup" values).

  Note that order values below 0 are reserved for framework purposes. Application-specified values should always be 0 or greater, with only framework components (internal or third-party) supposed to use lower values.

  Specified by:
    `getOrder` in interface `Ordered`
  Returns:
    the order value
  See Also:
    `Ordered.LOWEST_PRECEDENCE`

### suspend

    public void suspend()

  Description copied from interface: `TransactionSynchronization`
  Suspend this synchronization. Supposed to unbind resources from TransactionSynchronizationManager if managing any.

  Specified by:
    `suspend` in interface `TransactionSynchronization`
  See Also:
    `TransactionSynchronizationManager.unbindResource(java.lang.Object)`

### resume

    public void resume()

  Description copied from interface: `TransactionSynchronization`
  Resume this synchronization. Supposed to rebind resources to TransactionSynchronizationManager if managing any.

  Specified by:
    `resume` in interface `TransactionSynchronization`
  See Also:
    `TransactionSynchronizationManager.bindResource(java.lang.Object, java.lang.Object)`

### beforeCommit

    public void beforeCommit(boolean readOnly)

  Description copied from interface: `TransactionSynchronization`
  Invoked before transaction commit (before "beforeCompletion"). Can e.g. flush transactional O/R Mapping sessions to the database.

  This callback does not mean that the transaction will actually be committed. A rollback decision can still occur after this method has been called. This callback is rather meant to perform work that's only relevant if a commit still has a chance to happen, such as flushing SQL statements to the database.

  Note that exceptions will get propagated to the commit caller and cause a rollback of the transaction.

  Specified by:
    `beforeCommit` in interface `TransactionSynchronization`
  Parameters:
    `readOnly` - whether the transaction is defined as read-only transaction
  See Also:
    `TransactionSynchronization.beforeCompletion()`

### beforeCompletion

    public void beforeCompletion()

  Description copied from interface: `TransactionSynchronization`
  Invoked before transaction commit/rollback. Can perform resource cleanup before transaction completion.

  This method will be invoked after `beforeCommit`, even when `beforeCommit` threw an exception. This callback allows for closing resources before transaction completion, for any outcome.

  Specified by:
    `beforeCompletion` in interface `TransactionSynchronization`
  See Also:
    `TransactionSynchronization.beforeCommit(boolean)`, `TransactionSynchronization.afterCompletion(int)`

### afterCommit

    public void afterCommit()

  Description copied from interface: `TransactionSynchronization`
  Invoked after transaction commit. Can perform further operations right after the main transaction has successfully committed.

  Can e.g. commit further operations that are supposed to follow on a successful commit of the main transaction, like confirmation messages or emails.

  NOTE: The transaction will have been committed already, but the transactional resources might still be active and accessible. As a consequence, any data access code triggered at this point will still "participate" in the original transaction, allowing to perform some cleanup (with no commit following anymore!), unless it explicitly declares that it needs to run in a separate transaction. Hence: Use `PROPAGATION_REQUIRES_NEW` for any transactional operation that is called from here.

  Specified by:
    `afterCommit` in interface `TransactionSynchronization`

### afterCompletion

    public void afterCompletion(int status)

  Description copied from interface: `TransactionSynchronization`
  Invoked after transaction commit/rollback. Can perform resource cleanup after transaction completion.

  NOTE: The transaction will have been committed or rolled back already, but the transactional resources might still be active and accessible. As a consequence, any data access code triggered at this point will still "participate" in the original transaction, allowing to perform some cleanup (with no commit following anymore!), unless it explicitly declares that it needs to run in a separate transaction. Hence: Use `PROPAGATION_REQUIRES_NEW` for any transactional operation that is called from here.

  Specified by:
    `afterCompletion` in interface `TransactionSynchronization`
  Parameters:
    `status` - completion status according to the `STATUS_*` constants
  See Also:
    `TransactionSynchronization.STATUS_COMMITTED`, `TransactionSynchronization.STATUS_ROLLED_BACK`, `TransactionSynchronization.STATUS_UNKNOWN`, `TransactionSynchronization.beforeCompletion()`

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