org.melati.poem.transaction
Class Transaction

java.lang.Object
  org.melati.poem.transaction.Transaction

Direct Known Subclasses:

PoemTransaction

public abstract class Transaction
extends Object

A Transaction.

Field Summary

int	index Index of the Transaction.
int	mask Mask.
int	negMask Negative mask.

Constructor Summary

Transaction(TransactionPool transactionPoolP, int indexP)
Constructor.

Method Summary

protected abstract void	backingCommit()
protected abstract void	backingRollback()
void	commit() Finish up, for example write to database.
Transaction	getBlockedOn()
void	rollback() Finish without commit.
String	toString() The transaction index.
void	writeDown() Make persistent ie no longer able to be rolled back.

Methods inherited from class java.lang.Object

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

Field Detail

index

public final int index

Index of the Transaction.

mask

public final int mask

Mask.

negMask

public final int negMask

Negative mask.

Constructor Detail

Transaction

public Transaction(TransactionPool transactionPoolP,
                   int indexP)

Constructor.

Parameters:

transactionPoolP - the pool this transaction belongs to

indexP - the key for this Transaction

Method Detail

backingCommit

protected abstract void backingCommit()

backingRollback

protected abstract void backingRollback()

writeDown

public void writeDown()

Make persistent ie no longer able to be rolled back.

commit

public void commit()

Finish up, for example write to database.

rollback

public void rollback()

Finish without commit.

getBlockedOn

public Transaction getBlockedOn()

Returns:

the Transaction we are waiting for

toString

public String toString()

The transaction index.

Overrides:

toString in class Object

See Also:

Object.toString()