com.bigdata.journal

Class AbstractLocalTransactionManager

java.lang.Object

com.bigdata.journal.AbstractLocalTransactionManager

All Implemented Interfaces:

ILocalTransactionManager, IServiceShutdown

Direct Known Subclasses:

DataService.DataServiceTransactionManager

public abstract class AbstractLocalTransactionManager
extends Object
implements ILocalTransactionManager

Manages the client side of a transaction either for a standalone Journal or for an IDataService in an IBigdataFederation.

Author:

Bryan Thompson

Nested Class Summary

Nested classes/interfaces inherited from interface com.bigdata.service.IServiceShutdown

IServiceShutdown.Options

Constructor Summary

Constructors

Constructor and Description
AbstractLocalTransactionManager()

Method Summary

Methods

Modifier and Type	Method and Description
void	activateTx(Tx localState) Notify the journal that a new transaction is being activated (starting on the journal).
protected void	deactivateTx(Tx localState) Removes the transaction from the local tables.
ITxState[]	getActiveTx() Return a snapshot of the active transactions.
CounterSet	getCounters() Return interesting statistics about the transaction manager.
Tx	getTx(long tx) Return the local state for a transaction.
boolean	isOpen() Return true iff the service is running.
long	nextTimestamp() Note: The reason for all this retry logic is to work around race conditions during service startup (and possibly during service failover) when the ITimestampService has not been discovered yet.
void	notifyCommit(long commitTime) Notify the global transaction manager that a commit has been performed with the given timestamp (which it assigned) and that it should update its lastCommitTime iff the given commitTime is GT its current lastCommitTime.
void	shutdown() The service will no longer accept new requests, but existing requests will be processed (sychronous).
void	shutdownNow() The service will no longer accept new requests and will make a best effort attempt to terminate all existing requests and return ASAP.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.bigdata.journal.ILocalTransactionManager

getTransactionService

Constructor Detail

AbstractLocalTransactionManager

public AbstractLocalTransactionManager()

Method Detail

getActiveTx

public ITxState[] getActiveTx()

Description copied from interface: ILocalTransactionManager

Return a snapshot of the active transactions.

Specified by:

getActiveTx in interface ILocalTransactionManager

activateTx

public void activateTx(Tx localState)
                throws IllegalStateException

Notify the journal that a new transaction is being activated (starting on the journal).

Parameters:

localState - The transaction.

Throws:

IllegalStateException

deactivateTx

protected void deactivateTx(Tx localState)
                     throws IllegalStateException

Removes the transaction from the local tables.

Parameters:

localState - The transaction.

Throws:

IllegalStateException

getTx

public Tx getTx(long tx)

Return the local state for a transaction.

Specified by:

getTx in interface ILocalTransactionManager

Parameters:

tx - The transaction identifier.

Returns:

The local state for the identified transaction -or- null if the start time is not mapped to either an active or prepared transaction.

isOpen

public boolean isOpen()

Description copied from interface: IServiceShutdown

Return true iff the service is running.

Specified by:

isOpen in interface IServiceShutdown

shutdown

public void shutdown()

Description copied from interface: IServiceShutdown

The service will no longer accept new requests, but existing requests will be processed (sychronous). This method should await the termination of pending requests, but no longer than the timeout specified by IServiceShutdown.Options.SHUTDOWN_TIMEOUT. Implementations SHOULD be synchronized. If the service is aleady shutdown, then this method should be a NOP.

Specified by:

shutdown in interface IServiceShutdown

shutdownNow

public void shutdownNow()

Description copied from interface: IServiceShutdown

The service will no longer accept new requests and will make a best effort attempt to terminate all existing requests and return ASAP. This method should terminate any asynchronous processing, release all resources and return immediately. Implementations SHOULD be synchronized. If the service is aleady shutdown, then this method should be a NOP.

Specified by:

shutdownNow in interface IServiceShutdown

nextTimestamp

public long nextTimestamp()

Note: The reason for all this retry logic is to work around race conditions during service startup (and possibly during service failover) when the ITimestampService has not been discovered yet.

Specified by:

nextTimestamp in interface ILocalTransactionManager

Returns:

The next timestamp assigned by the ITransactionService.

See Also:

ITimestampService.nextTimestamp()

notifyCommit

public void notifyCommit(long commitTime)

Description copied from interface: ILocalTransactionManager

Notify the global transaction manager that a commit has been performed with the given timestamp (which it assigned) and that it should update its lastCommitTime iff the given commitTime is GT its current lastCommitTime.

Specified by:

notifyCommit in interface ILocalTransactionManager

Parameters:

commitTime - The commit time.

See Also:

ITransactionService.notifyCommit(long)

getCounters

public CounterSet getCounters()

Return interesting statistics about the transaction manager.