org.hibernate.transaction

Class CMTTransaction

java.lang.Object

org.hibernate.transaction.CMTTransaction

All Implemented Interfaces:

Transaction

Direct Known Subclasses:

JoinableCMTTransaction

public class CMTTransaction
extends Object
implements Transaction

Implements a basic transaction strategy for CMT transactions. All work is done in the context of the container managed transaction.

The term 'CMT' is potentially misleading here; the pertinent point simply being that the transactions are being managed by something other than the Hibernate transaction mechanism.

Author:

Gavin King

Field Summary

Fields

Modifier and Type	Field and Description
protected JDBCContext	jdbcContext
protected TransactionFactory.Context	transactionContext

Constructor Summary

Constructors

Constructor and Description
CMTTransaction(JDBCContext jdbcContext, TransactionFactory.Context transactionContext)

Method Summary

Modifier and Type	Method and Description
void	begin() Begin a new transaction.
void	commit() Flush the associated Session and end the unit of work (unless we are in FlushMode.MANUAL.
Transaction	getTransaction() Getter for property 'transaction'.
boolean	isActive() Is this transaction still active? Again, this only returns information in relation to the local transaction, not the actual underlying transaction.
void	registerSynchronization(Synchronization sync) Register a user synchronization callback for this transaction.
void	rollback() Force the underlying transaction to roll back.
void	setTimeout(int seconds) Set the transaction timeout for any transaction started by a subsequent call to begin() on this instance.
boolean	wasCommitted() Check if this transaction was successfully committed.
boolean	wasRolledBack() Was this transaction rolled back or set to rollback only? This only accounts for actions initiated from this local transaction.

Methods inherited from class java.lang.Object

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

Field Detail

jdbcContext

protected final JDBCContext jdbcContext

transactionContext

protected final TransactionFactory.Context transactionContext

Constructor Detail

CMTTransaction

public CMTTransaction(JDBCContext jdbcContext,
                      TransactionFactory.Context transactionContext)

Method Detail

begin

public void begin()
           throws HibernateException

Begin a new transaction.

Specified by:

begin in interface Transaction

Throws:

HibernateException

commit

public void commit()
            throws HibernateException

Flush the associated Session and end the unit of work (unless we are in FlushMode.MANUAL.

This method will commit the underlying transaction if and only if the underlying transaction was initiated by this object.

Specified by:

commit in interface Transaction

Throws:

HibernateException

rollback

public void rollback()
              throws HibernateException

Force the underlying transaction to roll back.

Specified by:

rollback in interface Transaction

Throws:

HibernateException

getTransaction

public Transaction getTransaction()
                           throws SystemException

Getter for property 'transaction'.

Returns:

Value for property 'transaction'.

Throws:

SystemException

isActive

public boolean isActive()
                 throws TransactionException

Is this transaction still active?

Again, this only returns information in relation to the local transaction, not the actual underlying transaction.

Specified by:

isActive in interface Transaction

Returns:

boolean Treu if this local transaction is still active.

Throws:

TransactionException

wasRolledBack

public boolean wasRolledBack()
                      throws TransactionException

Was this transaction rolled back or set to rollback only?

This only accounts for actions initiated from this local transaction. If, for example, the underlying transaction is forced to rollback via some other means, this method still reports false because the rollback was not initiated from here.

Specified by:

wasRolledBack in interface Transaction

Returns:

boolean True if the transaction was rolled back via this local transaction; false otherwise.

Throws:

TransactionException

wasCommitted

public boolean wasCommitted()
                     throws TransactionException

Check if this transaction was successfully committed.

This method could return false even after successful invocation of Transaction.commit(). As an example, JTA based strategies no-op on Transaction.commit() calls if they did not start the transaction; in that case, they also report Transaction.wasCommitted() as false.

Specified by:

wasCommitted in interface Transaction

Returns:

boolean True if the transaction was (unequivocally) committed via this local transaction; false otherwise.

Throws:

TransactionException

registerSynchronization

public void registerSynchronization(Synchronization sync)
                             throws HibernateException

Register a user synchronization callback for this transaction.

Specified by:

registerSynchronization in interface Transaction

Parameters:

sync - The Synchronization callback to register.

Throws:

HibernateException

setTimeout

public void setTimeout(int seconds)

Set the transaction timeout for any transaction started by a subsequent call to begin() on this instance.

Specified by:

setTimeout in interface Transaction

Parameters:

seconds - The number of seconds before a timeout.