org.objectweb.cjdbc.controller.core.shutdown
Class VirtualDatabaseShutdownThread

java.lang.Object
  org.objectweb.cjdbc.controller.core.shutdown.ShutdownThread
      org.objectweb.cjdbc.controller.core.shutdown.VirtualDatabaseShutdownThread

All Implemented Interfaces:

java.lang.Runnable

Direct Known Subclasses:

VirtualDatabaseForceShutdownThread, VirtualDatabaseSafeShutdownThread, VirtualDatabaseWaitShutdownThread

public abstract class VirtualDatabaseShutdownThread

extends ShutdownThread

Abstract class for all implementations of virtual database shutdown strategies.

Version:

1.0

Author:

Nicolas Modrzyk , Emmanuel Cecchet

Field Summary

protected VirtualDatabase

virtualDatabase

Fields inherited from class org.objectweb.cjdbc.controller.core.shutdown.ShutdownThread

logger, shutdownGroup, shutdownLevel

Constructor Summary

VirtualDatabaseShutdownThread(VirtualDatabase vdb, int level)
Prepare the thread for shutting down.

Method Summary

protected void	disableAllBackends() Disable all database backends with a checkpoint named after the current time if a recovery log is available.
protected void	shutdownCacheRecoveryLogAndGroupCommunication() Shutdown the result cache, recovery log and close the distributed virtual database group communication channel (if the virtual database is distributed).
protected void	terminateVirtualDatabaseWorkerThreads() Terminate the VirtualDatabaseWorkerThreads
protected void	waitForClientsToDisconnect() Wait for all VirtualDatabaseWorkerThreads to terminate when all clients have disconnected.
protected void	waitForTransactionsAndWritesToComplete() Wait for currently open transactions and pending writes to complete (in this order: 1.transaction, 2.writes).

Methods inherited from class org.objectweb.cjdbc.controller.core.shutdown.ShutdownThread

abortShutdown, getShutdownGroup, getShutdownLevel, run, shutdown

Methods inherited from class java.lang.Object

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

Field Detail

virtualDatabase

protected VirtualDatabase virtualDatabase

Constructor Detail

VirtualDatabaseShutdownThread

public VirtualDatabaseShutdownThread(VirtualDatabase vdb,
                                     int level)

Prepare the thread for shutting down.

Parameters:

vdb - the database to shutdown

level - Constants.SHUTDOWN_WAIT, Constants.SHUTDOWN_SAFE or Constants.SHUTDOWN_FORCE

Method Detail

shutdownCacheRecoveryLogAndGroupCommunication

protected void shutdownCacheRecoveryLogAndGroupCommunication()

Shutdown the result cache, recovery log and close the distributed virtual database group communication channel (if the virtual database is distributed).

disableAllBackends

protected void disableAllBackends()

Disable all database backends with a checkpoint named after the current time if a recovery log is available.

terminateVirtualDatabaseWorkerThreads

protected void terminateVirtualDatabaseWorkerThreads()

Terminate the VirtualDatabaseWorkerThreads

waitForClientsToDisconnect

protected void waitForClientsToDisconnect()

Wait for all VirtualDatabaseWorkerThreads to terminate when all clients have disconnected.

waitForTransactionsAndWritesToComplete

protected void waitForTransactionsAndWritesToComplete()

Wait for currently open transactions and pending writes to complete (in this order: 1.transaction, 2.writes).