com.lucidera.farrago
Class LucidDbTxnMgr

java.lang.Object
  net.sf.farrago.db.FarragoDbNullTxnMgr
      com.lucidera.farrago.LucidDbTxnMgr

All Implemented Interfaces:

FarragoSessionTxnMgr

 class LucidDbTxnMgr
extends FarragoDbNullTxnMgr

LucidDbTxnMgr implements the FarragoSessionTxnMgr interface with locking semantics customized for LucidDB.

Version:

$Id: //open/dev/farrago/src/com/lucidera/farrago/LucidDbTxnMgr.java#8 $

Author:

John V. Sichi

Field Summary

private org.apache.commons.transaction.locking.LockManager2	lockMgr
private static Logger	tracer

Constructor Summary

LucidDbTxnMgr()

Method Summary

protected void	accessTable(FarragoSessionTxnId txnId, List<String> localTableName, TableAccessMap.Mode accessType) Called by accessTables for each table accessed.
private void	acquireLock(FarragoSessionTxnId txnId, Object resourceId, String renderedName, int lockLevel)
FarragoSessionTxnId	beginTxn(FarragoSession session) Begins a new transaction.
void	endTxn(FarragoSessionTxnId txnId, FarragoSessionTxnEnd endType) Notifies transaction manager that a transaction is ending.

Methods inherited from class net.sf.farrago.db.FarragoDbNullTxnMgr

accessTables, addListener, removeListener

Methods inherited from class java.lang.Object

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

Field Detail

tracer

private static final Logger tracer

lockMgr

private final org.apache.commons.transaction.locking.LockManager2 lockMgr

Constructor Detail

LucidDbTxnMgr

LucidDbTxnMgr()

Method Detail

beginTxn

public FarragoSessionTxnId beginTxn(FarragoSession session)

Description copied from interface: FarragoSessionTxnMgr

Begins a new transaction.

Specified by:

beginTxn in interface FarragoSessionTxnMgr

Overrides:

beginTxn in class FarragoDbNullTxnMgr

Parameters:

session - session initiating the transaction

Returns:

transaction ID

accessTable

protected void accessTable(FarragoSessionTxnId txnId,
                           List<String> localTableName,
                           TableAccessMap.Mode accessType)

Description copied from class: FarragoDbNullTxnMgr

Called by accessTables for each table accessed. Default implementation is to do nothing; subclasses override this to take real actions such as calling a lock manager.

Overrides:

accessTable in class FarragoDbNullTxnMgr

Parameters:

txnId - ID of accessing transaction

localTableName - qualified name of table as it is known in the local catalog

accessType - type of table access

endTxn

public void endTxn(FarragoSessionTxnId txnId,
                   FarragoSessionTxnEnd endType)

Description copied from interface: FarragoSessionTxnMgr

Notifies transaction manager that a transaction is ending.

Specified by:

endTxn in interface FarragoSessionTxnMgr

Overrides:

endTxn in class FarragoDbNullTxnMgr

Parameters:

txnId - ID of ending transaction

endType - how transaction is ending

acquireLock

private void acquireLock(FarragoSessionTxnId txnId,
                         Object resourceId,
                         String renderedName,
                         int lockLevel)