org.ofbiz.core.entity

Class TransactionUtil

java.lang.Object

org.ofbiz.core.entity.TransactionUtil

All Implemented Interfaces:

Status

public class TransactionUtil
extends Object
implements Status

Transaction Utility to help with some common transaction tasks

Provides a wrapper around the transaction objects to allow for changes in underlying implementations in the future.

Since:

2.0

Version:

$Revision: 1.5 $

Author:

David E. Jones

Field Summary

Fields

Modifier and Type	Field and Description
static ThreadLocal<org.ofbiz.core.entity.TransactionUtil.LocalTransaction>	localTransaction
static String	module

Fields inherited from interface javax.transaction.Status

STATUS_ACTIVE, STATUS_COMMITTED, STATUS_COMMITTING, STATUS_MARKED_ROLLBACK, STATUS_NO_TRANSACTION, STATUS_PREPARED, STATUS_PREPARING, STATUS_ROLLEDBACK, STATUS_ROLLING_BACK, STATUS_UNKNOWN

Constructor Summary

Constructors

Constructor and Description
TransactionUtil()

Method Summary

Modifier and Type	Method and Description
static boolean	begin() Begins a transaction in the current thread IF transactions are available; only tries if the current transaction status is ACTIVE, if not active it returns false.
static boolean	beginLocalTransaction(String helperName, int transactionIsolationLevel) Starts a transaction if one does not exist already.
static void	clearTransactionThreadLocal() A method that ensures the connection is cleared.
static void	closeAndClearThreadLocalConnection() If a connection exists in the thread local close it.
static void	commit() Commits the transaction in the current thread IF transactions are available
static void	commit(boolean beganTransaction) Commits the transaction in the current thread IF transactions are available AND if beganTransaction is true
static void	commitLocalTransaction(boolean beganTransaction) Commits a transaction if beganTransaction is true and there is an active transaction.
static Connection	enlistConnection(XAConnection xacon) Enlists the given XAConnection and if a transaction is active in the current thread, returns a plain JDBC Connection
static void	enlistResource(XAResource resource)
static Connection	getLocalTransactionConnection()
static int	getStatus() Gets the status of the transaction in the current thread IF transactions are available, otherwise returns STATUS_NO_TRANSACTION
static boolean	isTransactionActive() Checks if there is a Connection with a transaction for the current thread.
static void	rollback() Rolls back transaction in the current thread IF transactions are available
static void	rollback(boolean beganTransaction) Rolls back transaction in the current thread IF transactions are available AND if beganTransaction is true; if beganTransaction is not true, setRollbackOnly is called to insure that the transaction will be rolled back
static void	rollbackLocalTransaction(boolean beganTransaction) Rolls back a transaction if beganTransaction is true and there is an active transaction.
static void	rollbackRequiredLocalTransaction(boolean beganTransaction) Makes a rollback the only possible outcome of the transaction in the current thread IF transactions are available.
static void	setRollbackOnly() Makes a roll back the only possible outcome of the transaction in the current thread IF transactions are available
static void	setTransactionTimeout(int seconds) Sets the timeout of the transaction in the current thread IF transactions are available

Methods inherited from class java.lang.Object

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

Field Detail

module

public static final String module

localTransaction

public static final ThreadLocal<org.ofbiz.core.entity.TransactionUtil.LocalTransaction> localTransaction

Constructor Detail

TransactionUtil

public TransactionUtil()

Method Detail

begin

public static boolean begin()
                     throws GenericTransactionException

Begins a transaction in the current thread IF transactions are available; only tries if the current transaction status is ACTIVE, if not active it returns false. If and on only if it begins a transaction it will return true. In other words, if a transaction is already in place it will return false and do nothing.

Throws:

GenericTransactionException

getStatus

public static int getStatus()
                     throws GenericTransactionException

Gets the status of the transaction in the current thread IF transactions are available, otherwise returns STATUS_NO_TRANSACTION

Throws:

GenericTransactionException

commit

public static void commit(boolean beganTransaction)
                   throws GenericTransactionException

Commits the transaction in the current thread IF transactions are available AND if beganTransaction is true

Throws:

GenericTransactionException

commit

public static void commit()
                   throws GenericTransactionException

Commits the transaction in the current thread IF transactions are available

Throws:

GenericTransactionException

rollback

public static void rollback(boolean beganTransaction)
                     throws GenericTransactionException

Rolls back transaction in the current thread IF transactions are available AND if beganTransaction is true; if beganTransaction is not true, setRollbackOnly is called to insure that the transaction will be rolled back

Throws:

GenericTransactionException

rollback

public static void rollback()
                     throws GenericTransactionException

Rolls back transaction in the current thread IF transactions are available

Throws:

GenericTransactionException

setRollbackOnly

public static void setRollbackOnly()
                            throws GenericTransactionException

Makes a roll back the only possible outcome of the transaction in the current thread IF transactions are available

Throws:

GenericTransactionException

setTransactionTimeout

public static void setTransactionTimeout(int seconds)
                                  throws GenericTransactionException

Sets the timeout of the transaction in the current thread IF transactions are available

Throws:

GenericTransactionException

enlistConnection

public static Connection enlistConnection(XAConnection xacon)
                                   throws GenericTransactionException

Enlists the given XAConnection and if a transaction is active in the current thread, returns a plain JDBC Connection

Throws:

GenericTransactionException

enlistResource

public static void enlistResource(XAResource resource)
                           throws GenericTransactionException

Throws:

GenericTransactionException

beginLocalTransaction

public static boolean beginLocalTransaction(String helperName,
                                            int transactionIsolationLevel)
                                     throws GenericTransactionException

Starts a transaction if one does not exist already.

Parameters:

helperName - the OfBiz helperName that is registered within entityengine.xml. The helperName is used to retrieve the connection from the com.atlassian.core.ofbiz.CoreFactory object.

transactionIsolationLevel - the transaction isolation level to set on the connection if the transaction is started, see Connection.setTransactionIsolation(int). Negative means do not set anything. (the connection's default level will be used)

Returns:

true if the transaction was started, false if one was active already

Throws:

GenericTransactionException - if something goes wrong. See the getNested() method of the exception for the underlying exception.

getLocalTransactionConnection

public static Connection getLocalTransactionConnection()

Returns:

the Connection that has an active connection for the current thread.

isTransactionActive

public static boolean isTransactionActive()

Checks if there is a Connection with a transaction for the current thread.

Returns:

true if there is an active transaction for the current thread

commitLocalTransaction

public static void commitLocalTransaction(boolean beganTransaction)
                                   throws GenericTransactionException

Commits a transaction if beganTransaction is true and there is an active transaction. See isTransactionActive(). If beganTransaction is false or if there is no active transaction this method does nothing.

Common usage is:

 boolean started = TransactionUtil.beginLocalTransaction("default", Connection.TRANSACTION_READ_COMMITTED);
 ...
 TransactionUtil.commitLocalTransaction(started);
 

Parameters:

beganTransaction - whether the transaction was started

Throws:

GenericTransactionException - if something goes wrong. See the getNested() method of the exception for the underlying exception.

rollbackLocalTransaction

public static void rollbackLocalTransaction(boolean beganTransaction)
                                     throws GenericTransactionException

Rolls back a transaction if beganTransaction is true and there is an active transaction. See isTransactionActive(). If beganTransaction is false or if there is no active transaction this method does nothing.

Common usage is:

 boolean started = TransactionUtil.beginLocalTransaction("default", Connection.TRANSACTION_READ_COMMITTED);
 ...
 TransactionUtil.rollbackLocalTransaction(started);
 

Parameters:

beganTransaction - whether the transaction was started

Throws:

GenericTransactionException - if something goes wrong. See the getNested() method of the exception for the underlying exception.

rollbackRequiredLocalTransaction

public static void rollbackRequiredLocalTransaction(boolean beganTransaction)
                                             throws GenericTransactionException

Makes a rollback the only possible outcome of the transaction in the current thread IF transactions are available.

Throws:

GenericTransactionException

closeAndClearThreadLocalConnection

public static void closeAndClearThreadLocalConnection()

If a connection exists in the thread local close it. Clear the thread local no matter what.

clearTransactionThreadLocal

public static void clearTransactionThreadLocal()

A method that ensures the connection is cleared. This is useful to call from within a servlet filter to ensure that connections are not leaked anywhere.