org.springframework.transaction.support
Class ResourceHolderSupport

java.lang.Object
  org.springframework.transaction.support.ResourceHolderSupport

All Implemented Interfaces:

ResourceHolder

Direct Known Subclasses:

ConnectionHolder, ConnectionHolder, EntityManagerHolder, JmsResourceHolder, PersistenceManagerHolder, SessionHolder, SessionHolder

public abstract class ResourceHolderSupport
extends Object
implements ResourceHolder

Convenient base class for resource holders.

Features rollback-only support for nested transactions. Can expire after a certain number of seconds or milliseconds, to determine transactional timeouts.

Since:

02.02.2004

Author:

Juergen Hoeller

See Also:

DataSourceTransactionManager.doBegin(java.lang.Object, org.springframework.transaction.TransactionDefinition), DataSourceUtils.applyTransactionTimeout(java.sql.Statement, javax.sql.DataSource)

Constructor Summary

ResourceHolderSupport()

Method Summary

void	clear() Clear the transactional state of this resource holder.
Date	getDeadline() Return the expiration deadline of this object.
long	getTimeToLiveInMillis() Return the time to live for this object in milliseconds.
int	getTimeToLiveInSeconds() Return the time to live for this object in seconds.
boolean	hasTimeout() Return whether this object has an associated timeout.
boolean	isOpen() Return whether there are still open references to this holder.
boolean	isRollbackOnly() Return whether the resource transaction is marked as rollback-only.
boolean	isSynchronizedWithTransaction() Return whether the resource is synchronized with a transaction.
boolean	isVoid() Determine whether this holder is considere as 'void', i.e. as a leftover from a previous thread.
void	released() Decrease the reference count by one because the holder has been released (i.e. someone released the resource held by it).
void	requested() Increase the reference count by one because the holder has been requested (i.e. someone requested the resource held by it).
void	reset() Reset this resource holder - transactional state as well as reference count.
void	setRollbackOnly() Mark the resource transaction as rollback-only.
void	setSynchronizedWithTransaction(boolean synchronizedWithTransaction) Mark the resource as synchronized with a transaction.
void	setTimeoutInMillis(long millis) Set the timeout for this object in milliseconds.
void	setTimeoutInSeconds(int seconds) Set the timeout for this object in seconds.
void	unbound() Notify this holder that it has been unbound from transaction synchronization.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceHolderSupport

public ResourceHolderSupport()

Method Detail

setSynchronizedWithTransaction

public void setSynchronizedWithTransaction(boolean synchronizedWithTransaction)

Mark the resource as synchronized with a transaction.

isSynchronizedWithTransaction

public boolean isSynchronizedWithTransaction()

Return whether the resource is synchronized with a transaction.

setRollbackOnly

public void setRollbackOnly()

Mark the resource transaction as rollback-only.

isRollbackOnly

public boolean isRollbackOnly()

Return whether the resource transaction is marked as rollback-only.

setTimeoutInSeconds

public void setTimeoutInSeconds(int seconds)

Set the timeout for this object in seconds.

Parameters:

seconds - number of seconds until expiration

setTimeoutInMillis

public void setTimeoutInMillis(long millis)

Set the timeout for this object in milliseconds.

Parameters:

millis - number of milliseconds until expiration

hasTimeout

public boolean hasTimeout()

Return whether this object has an associated timeout.

getDeadline

public Date getDeadline()

Return the expiration deadline of this object.

Returns:

the deadline as Date object

getTimeToLiveInSeconds

public int getTimeToLiveInSeconds()

Return the time to live for this object in seconds. Rounds up eagerly, e.g. 9.00001 still to 10.

Returns:

number of seconds until expiration

Throws:

TransactionTimedOutException - if the deadline has already been reached

getTimeToLiveInMillis

public long getTimeToLiveInMillis()
                           throws TransactionTimedOutException

Return the time to live for this object in milliseconds.

Returns:

number of millseconds until expiration

Throws:

TransactionTimedOutException - if the deadline has already been reached

requested

public void requested()

Increase the reference count by one because the holder has been requested (i.e. someone requested the resource held by it).

released

public void released()

Decrease the reference count by one because the holder has been released (i.e. someone released the resource held by it).

isOpen

public boolean isOpen()

Return whether there are still open references to this holder.

clear

public void clear()

Clear the transactional state of this resource holder.

reset

public void reset()

Reset this resource holder - transactional state as well as reference count.

Specified by:

reset in interface ResourceHolder

unbound

public void unbound()

Description copied from interface: ResourceHolder

Notify this holder that it has been unbound from transaction synchronization.

Specified by:

unbound in interface ResourceHolder

isVoid

public boolean isVoid()

Description copied from interface: ResourceHolder

Determine whether this holder is considere as 'void', i.e. as a leftover from a previous thread.

Specified by:

isVoid in interface ResourceHolder