# Package org.eclipse.emf.cdo.transaction

Client concepts for dealing with transactions, distributed transactions and their save points.

See: Description

- Interface Summary
  Interface | Description
  --- | ---
  CDOCommitContext | Provides a context for commit operations.
  CDOConflictResolver | A strategy used to customize the default conflict resolution behavior of `transactions`.
  CDOConflictResolver.NonConflictAware | A mix-in interface for `conflict resolvers` that need to know about non-conflicting invalidations.
  CDOConflictResolver2 | A strategy used to customize the default conflict resolution behavior of `transactions`.
  CDOConflictResolver3 | A strategy used to customize the default conflict resolution behavior of `transactions`.
  CDOMerger | Calculates the changes between a source `change set` and a target `change set` and returns the result relative to their common ancestor.
  CDOMerger2 |
  CDOSavepoint | One in a sequence of possibly several points in time of a `transaction` that encapsulates the changes to transactional objects and that later changes can be `rolled back` to.
  CDOStaleReferenceCleaner | Interface to externalize the cleaning of stale references created on invalidation.
  CDOTransaction | A read-write view to the current (i.e.
  CDOTransaction.Options | Encapsulates a set of notifying `transaction` configuration options.
  CDOTransaction.Options.AutoReleaseLocksEvent | An `options event` fired from transaction `options` when the `auto release locks enabled` or `auto release locks exemptions` options have changed.
  CDOTransaction.Options.AutoReleaseLocksEvent.AutoReleaseLocksEnabledEvent | An `auto release locks options event` fired from transaction `options` when the `auto release locks enabled` option has changed.
  CDOTransaction.Options.AutoReleaseLocksEvent.AutoReleaseLocksExemptionsEvent | An `auto release locks options event` fired from transaction `options` when the `auto release locks exemptions` option has changed.
  CDOTransaction.Options.CommitInfoTimeout | An `options event` fired from transaction `options` when the `commit info timeout` option has changed.
  CDOTransaction.Options.ConflictResolversEvent | An `options event` fired from transaction `options` when the `conflict resolvers` option has changed.
  CDOTransaction.Options.StaleReferenceCleanerEvent | An `options event` fired from transaction `options` when the `stale reference cleaner` option has changed.
  CDOTransaction.Options.UndoDetectorEvent | An `options event` fired from transaction `options` when the `undo detector` option has changed.
  CDOTransactionConflictEvent | A `view event` fired from a `transaction` for each `object` that enters the `conflict` state.
  CDOTransactionContainer | Can open new `transactions` and provide access to openend transactions.
  CDOTransactionFinishedEvent | A `view event` fired from a `transaction` when it becomes `clean` after a sucessful `commit` or `rollback`.
  CDOTransactionHandler | A combination of `CDOTransactionHandler1` and `CDOTransactionHandler2`.
  CDOTransactionHandler1 | A call-back interface that is called by a `transaction` before `objects` are attached, modified or detached.
  CDOTransactionHandler1.WithUndo |
  CDOTransactionHandler2 | A call-back interface that is called by a `transcation` before it is committed and after it has been committed or rolled back.
  CDOTransactionHandler3 | A call-back interface that is called by a `transcation` before it is committed and after it has been committed (with result info) or rolled back.
  CDOTransactionHandlerBase | A marker interface for use with `CDOTransaction.addTransactionHandler()` and `CDOTransaction.removeTransactionHandler()`.
  CDOTransactionOpener | Can open new `transactions`.
  CDOTransactionStartedEvent | A `view event` fired from a `transaction` when it first becomes `dirty`.
  CDOUndoDetector | A strategy used to detect whether the feature of an `object` has the original (clean) value after a number of modifications.
  CDOUserSavepoint | Creates a save point in a `CDOUserTransaction` that can be used to roll back a part of the transaction.
  CDOUserTransaction | Provides functionality that is common to both `single` transactions and `distributed` (XA) transactions.
  CDOXASavepoint | Creates a save point in a `CDOXATransaction` that can be used to roll back a part of the transaction.
  CDOXATransaction | A distributed (XA) transaction that can atomically commit the changes to multiple `resource sets`, each represented by a registered `view set`.

- Class Summary
  Class | Description
  --- | ---
  CDOAsyncTransactionHandler | Asynchronously executes a delegate handler's pre-event methods.
  CDOAutoAttacher | A `transaction handler` that automatically attaches cross-referenced objects to the `resource` that contains the referencing `object`.
  CDOAutoLocker | A `transaction handler` that automatically acquires `write locks` when `objects` are modified.
  CDOAutoLocker.ForSingleValuedChanges | An `auto locker` that only locks objects when their single-valued features are changed.
  CDODefaultTransactionHandler | An empty default implementation of `CDOTransactionHandler1` and `CDOTransactionHandler2`.
  CDODefaultTransactionHandler1 | An empty default implementation of `CDOTransactionHandler1`.
  CDODefaultTransactionHandler2 | An empty default implementation of `CDOTransactionHandler2`.
  CDODefaultTransactionHandler3 | An empty default implementation of `CDOTransactionHandler3`.
  CDOPostEventTransactionHandler | An abstract call-back class that is called by a `transcation` after `objects` have been attached, modified or detached.
  CDOPostEventTransactionHandler.Default | An empty default implementation of `CDOPostEventTransactionHandler`.
  CDOPushTransaction | A `transaction` that persists changes to the object graph locally on commit and can later load these changes and push them to the `repository`.
  CDOStaleReferenceCleaner.Default | A default `CDOStaleReferenceCleaner` that can be used on invalidation.
  CDOTransactionCommentator | A utility class that, when associated with a `transaction`, automatically updates the `commit comment` according to local model modifications.

- Enum Summary
  Enum | Description
  --- | ---
  CDOTransactionFinishedEvent.Cause | Enumerates the possible `causes` for a `transaction` to become finished.
  CDOTransactionFinishedEvent.Type | Deprecated As of 4.3 use `CDOTransactionFinishedEvent.Cause`.

- Exception Summary
  Exception | Description
  --- | ---
  CDOMerger.ConflictException | Thrown from a `merger` in case of conflicting changes in the a source and target `change sets`.

## Package org.eclipse.emf.cdo.transaction Description

Client concepts for dealing with transactions, distributed transactions and their save points.

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Copyright (c) 2014 Eike Stepper (Berlin, Germany) and others.
All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html