org.neo4j.kernel.impl.transaction
Class AbstractTransactionManager

java.lang.Object
  org.neo4j.kernel.impl.transaction.AbstractTransactionManager

All Implemented Interfaces:

TransactionManager

Direct Known Subclasses:

TxManager

public abstract class AbstractTransactionManager
extends Object
implements TransactionManager

This interface extends the TransactionManager, with the rationale that it additionally provides an init method that is used for recovery and a stop method for shutting down. Implementations are to hold an actual TrasactionManager and forward operations to it and additionally provide an implementation specific way of initializing it, ensuring tx recovery and an implementation specific way of shutting down, for resource reclamation.

Author:

Chris Gioran

Constructor Summary

AbstractTransactionManager()

Method Summary

void	attemptWaitForTxCompletionAndBlockFutureTransactions(long maxWaitTimeMillis) Prevents new transactions from being created by throwing exception in beginTx and waits for all existing transactions to complete.
abstract void	init(XaDataSourceManager xaDsManager) Begins the transaction manager, possibly triggering a recovery.
abstract void	stop() Stops the transaction manager, performing all implementation specific cleanup.

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.transaction.TransactionManager

begin, commit, getStatus, getTransaction, resume, rollback, setRollbackOnly, setTransactionTimeout, suspend

Constructor Detail

AbstractTransactionManager

public AbstractTransactionManager()

Method Detail

init

public abstract void init(XaDataSourceManager xaDsManager)

Begins the transaction manager, possibly triggering a recovery. The passed xaDsManager, given the startup sequence of the neo kernel, is assured to already have registered all xa resource adapters available for this run, so they can be used for registration for recovery purposes.

Parameters:

xaDsManager - The XaDataSourceManager that has registered the Xa resources.

stop

public abstract void stop()

Stops the transaction manager, performing all implementation specific cleanup.

attemptWaitForTxCompletionAndBlockFutureTransactions

public void attemptWaitForTxCompletionAndBlockFutureTransactions(long maxWaitTimeMillis)

Prevents new transactions from being created by throwing exception in beginTx and waits for all existing transactions to complete. When this method returns there are no transactions active and no new transactions can be started.