Package org.alfresco.repo.domain.control

Class AbstractControlDAOImpl

java.lang.Object

org.alfresco.repo.domain.control.AbstractControlDAOImpl

All Implemented Interfaces:

ControlDAO

Direct Known Subclasses:

ControlDAOImpl

public abstract class AbstractControlDAOImpl
extends Object
implements ControlDAO

Abstract implementation for connection controlling DAO.

Provides any basic logic.

Since:

3.2SP1

Author:

Derek Hulley

Constructor Summary

Constructors

Constructor	Description
AbstractControlDAOImpl()

Method Summary

Modifier and Type	Method	Description
Savepoint	createSavepoint(String savepoint)	Create a "Save Point" in the current transaction, for later selective rollback.
void	releaseSavepoint(Savepoint savepoint)	No-op
void	rollbackToSavepoint(Savepoint savepoint)	No-op
int	setTransactionIsolationLevel(int isolationLevel)	Change the current transaction isolation level.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.alfresco.repo.domain.control.ControlDAO

executeBatch, startBatch

Constructor Details

AbstractControlDAOImpl

public AbstractControlDAOImpl()

Method Details

createSavepoint

public Savepoint createSavepoint(String savepoint)

Description copied from interface: ControlDAO

Create a "Save Point" in the current transaction, for later selective rollback. Creation must be accompanied by a matching ControlDAO.rollbackToSavepoint(Savepoint) or ControlDAO.releaseSavepoint(Savepoint).

  Savepoint savepoint = controlDAO.createSavepoint("functionF");
  try
  {
      // Do something that could fail e.g. blind insert that might violate unique constraints
      ...
      // Success, so remove savepoint or risk crashing on long-running transactions
      controlDAO.releaseSavepoint(savepoint);
  }
  catch (Throwable e)
  {
      controlDAO.rollbackToSavepoint(savepoint);
      // Throw something that client code might be able to react to or try something else
      ...
  }
 

Specified by:

createSavepoint in interface ControlDAO

Parameters:

savepoint - the name of the save point

Returns:

Returns null by default i.e. not supported

rollbackToSavepoint

public void rollbackToSavepoint(Savepoint savepoint)

No-op

Specified by:

rollbackToSavepoint in interface ControlDAO

Parameters:

savepoint - a previously-created savepoint

See Also:

• ControlDAO.createSavepoint(String)

releaseSavepoint

public void releaseSavepoint(Savepoint savepoint)

No-op

Specified by:

releaseSavepoint in interface ControlDAO

Parameters:

savepoint - the name of the save point

See Also:

• ControlDAO.createSavepoint(String)

setTransactionIsolationLevel

public int setTransactionIsolationLevel(int isolationLevel)

Description copied from interface: ControlDAO

Change the current transaction isolation level.

Note: The isolation level should not - and for some DBs, cannot - be changed except at the very start of the transaction

Specified by:

setTransactionIsolationLevel in interface ControlDAO

Parameters:

isolationLevel - the transaction isolation level

Returns:

Returns the previously-set isolation