org.xvsm.internal.tasks.dao.inmemory
Class TransactionDAO

java.lang.Object
  org.xvsm.internal.tasks.dao.inmemory.TransactionDAO

All Implemented Interfaces:

java.util.concurrent.locks.ReadWriteLock, ITransactionDAO

public class TransactionDAO
extends java.lang.Object
implements ITransactionDAO

Author:

Christian Schreiber, Michael Proestler

Constructor Summary

TransactionDAO()

Method Summary

boolean	add(OperationTask task, Transaction source) Adds a OperationTask.
void	commit(Transaction tx) Informs that the transaction has commited.
java.util.List<OperationTask>	getAll() Returns a List with all Tasks.
java.util.concurrent.locks.Lock	readLock() .
void	remove(OperationTask t) Removes the task.
java.util.List<OperationTask>	take() Takes all OperationTasks.
java.util.concurrent.locks.Lock	writeLock() .

Methods inherited from class java.lang.Object

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

Constructor Detail

TransactionDAO

public TransactionDAO()

Method Detail

add

public boolean add(OperationTask task,
                   Transaction source)

Adds a OperationTask..

Specified by:

add in interface ITransactionDAO

Parameters:

task - the new task.

source - the transaction that is the reason for this exception.

Returns:

true, if the task has been stored, false if at the according transaction has already commit during that time.

take

public java.util.List<OperationTask> take()

Takes all OperationTasks..

Specified by:

take in interface ITransactionDAO

Returns:

all tasks.

getAll

public java.util.List<OperationTask> getAll()

Returns a List with all Tasks..

Specified by:

getAll in interface ITransactionDAO

Returns:

all tasks.

readLock

public java.util.concurrent.locks.Lock readLock()

.

Specified by:

readLock in interface java.util.concurrent.locks.ReadWriteLock

writeLock

public java.util.concurrent.locks.Lock writeLock()

.

Specified by:

writeLock in interface java.util.concurrent.locks.ReadWriteLock

commit

public void commit(Transaction tx)

Informs that the transaction has commited.

Specified by:

commit in interface ITransactionDAO

Parameters:

tx - the transaction that has committed.

remove

public void remove(OperationTask t)

Removes the task.

Specified by:

remove in interface ITransactionDAO

Parameters:

t - the Task to remove.