org.jboss.cache.interceptors
Class TxInterceptor

java.lang.Object
  org.jboss.cache.interceptors.Interceptor
      org.jboss.cache.interceptors.TxInterceptor

All Implemented Interfaces:

InterceptorMBean, TxInterceptorMBean

public class TxInterceptor
extends Interceptor
implements TxInterceptorMBean

This interceptor is the new default at the head of all interceptor chains, and makes transactional attributes available to all interceptors in the chain. This interceptor is also responsible for registering for synchronisation on transaction completion.

Author:

Manik Surtani (manik@jboss.org), Steve Woodcock (stevew@jofti.com)

Field Summary

protected javax.transaction.TransactionManager	txManager
protected TransactionTable	txTable

Constructor Summary

TxInterceptor()

Method Summary

java.util.Map	dumpStatistics() Returns a map of the cache interceptor's statistics Map elements consist of {String name, Object value} entries
protected GlobalTransaction	findGlobalTransaction(java.lang.Object[] params)
long	getCommits() Returns the number of transaction commits
long	getPrepares() Returns the number of transaction prepares
long	getRollbacks() Returns the number of transaction rollbacks
java.lang.Object	invoke(org.jgroups.blocks.MethodCall m)
void	resetStatistics() Resets an interceptor's cache statistics
protected void	runCommitPhase(GlobalTransaction gtx, javax.transaction.Transaction tx, java.util.List modifications, boolean onePhaseCommit) creates a commit() MethodCall and feeds it to handleCommitRollback();
protected java.lang.Object	runPreparePhase(GlobalTransaction gtx, java.util.List modifications) Handles a local prepare - invoked by the sync handler.
protected void	runRollbackPhase(GlobalTransaction gtx, javax.transaction.Transaction tx, java.util.List modifications) creates a rollback() MethodCall and feeds it to handleCommitRollback();
void	setCache(TreeCache cache)

Methods inherited from class org.jboss.cache.interceptors.Interceptor

getInvocationContext, getNext, getStatisticsEnabled, isActive, isOnePhaseCommitPrepareMehod, isPreparing, isTransactionLifecycleMethod, isValid, setInvocationContext, setNext, setStatisticsEnabled

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jboss.cache.interceptors.InterceptorMBean

getStatisticsEnabled, setStatisticsEnabled

Field Detail

txManager

protected javax.transaction.TransactionManager txManager

txTable

protected TransactionTable txTable

Constructor Detail

TxInterceptor

public TxInterceptor()

Method Detail

setCache

public void setCache(TreeCache cache)

Overrides:

setCache in class Interceptor

invoke

public java.lang.Object invoke(org.jgroups.blocks.MethodCall m)
                        throws java.lang.Throwable

Overrides:

invoke in class Interceptor

Throws:

java.lang.Throwable

getPrepares

public long getPrepares()

Description copied from interface: TxInterceptorMBean

Returns the number of transaction prepares

Specified by:

getPrepares in interface TxInterceptorMBean

Returns:

the number of prepares

getCommits

public long getCommits()

Description copied from interface: TxInterceptorMBean

Returns the number of transaction commits

Specified by:

getCommits in interface TxInterceptorMBean

Returns:

the number of commits

getRollbacks

public long getRollbacks()

Description copied from interface: TxInterceptorMBean

Returns the number of transaction rollbacks

Specified by:

getRollbacks in interface TxInterceptorMBean

Returns:

the number of rollbacks

resetStatistics

public void resetStatistics()

Description copied from interface: InterceptorMBean

Resets an interceptor's cache statistics

Specified by:

resetStatistics in interface InterceptorMBean

Overrides:

resetStatistics in class Interceptor

dumpStatistics

public java.util.Map dumpStatistics()

Description copied from interface: InterceptorMBean

Returns a map of the cache interceptor's statistics Map elements consist of {String name, Object value} entries

Specified by:

dumpStatistics in interface InterceptorMBean

Overrides:

dumpStatistics in class Interceptor

Returns:

a map containing statistics

findGlobalTransaction

protected GlobalTransaction findGlobalTransaction(java.lang.Object[] params)

runCommitPhase

protected void runCommitPhase(GlobalTransaction gtx,
                              javax.transaction.Transaction tx,
                              java.util.List modifications,
                              boolean onePhaseCommit)

creates a commit() MethodCall and feeds it to handleCommitRollback();

Parameters:

gtx -

runRollbackPhase

protected void runRollbackPhase(GlobalTransaction gtx,
                                javax.transaction.Transaction tx,
                                java.util.List modifications)

creates a rollback() MethodCall and feeds it to handleCommitRollback();

Parameters:

gtx -

runPreparePhase

protected java.lang.Object runPreparePhase(GlobalTransaction gtx,
                                           java.util.List modifications)
                                    throws java.lang.Throwable

Handles a local prepare - invoked by the sync handler. Tests if the current tx matches the gtx passed in to the method call and passes the prepare() call up the chain.

Returns:

Throws:

java.lang.Throwable