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

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

All Implemented Interfaces:

java.lang.Runnable

Direct Known Subclasses:

ControllerShutdownThread, VirtualDatabaseShutdownThread

public abstract class ShutdownThread

extends java.lang.Object

implements java.lang.Runnable

Skeleton for shutdown threads. This includes Controller, VirtualDatabase and DatabaseBackend shutdown threads.

Author:

Nicolas Modrzyk

Field Summary

static java.lang.String	BACKEND Backend Thread
static java.lang.String	CONTROLLER Controller Thread
static java.lang.String	DATABASE Database Thread
(package private) Trace	logger Logger instance.
protected java.lang.String	name
java.lang.ThreadGroup	shutdownGroup Group to join onto when shutting down
protected int	shutdownLevel
protected java.lang.String	type

Constructor Summary

ShutdownThread(int level, java.lang.String type, java.lang.String name)
Create a new shutdown thread

Method Summary

void	abortShutdown(java.lang.Exception cause) If shutdown fails ...
protected void	beforeShutdown()
java.lang.ThreadGroup	getShutdownGroup() Returns the shutdownGroup value.
int	getShutdownLevel() Get shutdown level
java.lang.String	getShutdownType() Get shutdown type
protected void	postShutdown()
void	run() Execute the shutdown
abstract void	shutdownFast() Wait for all clients to finish transaction and then force disconnection.
abstract void	shutdownImmediate() Force immediate shutdown.
abstract void	shutdownSmart() Wait for all clients to finish transaction and disconnect.

Methods inherited from class java.lang.Object

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

Field Detail

CONTROLLER

public static final java.lang.String CONTROLLER

Controller Thread

See Also:

Constant Field Values

DATABASE

public static final java.lang.String DATABASE

Database Thread

See Also:

Constant Field Values

BACKEND

public static final java.lang.String BACKEND

Backend Thread

See Also:

Constant Field Values

shutdownGroup

public java.lang.ThreadGroup shutdownGroup

Group to join onto when shutting down

shutdownLevel

protected int shutdownLevel

logger

Trace logger

Logger instance.

type

protected java.lang.String type

name

protected java.lang.String name

Constructor Detail

ShutdownThread

public ShutdownThread(int level,
                      java.lang.String type,
                      java.lang.String name)

Create a new shutdown thread

Parameters:

level - Immediate,Smart,Fast

type - of shutdown thread for logging

name - of element to shutdown

Method Detail

run

public void run()

Execute the shutdown

Specified by:

run in interface java.lang.Runnable

See Also:

Runnable.run()

beforeShutdown

protected void beforeShutdown()

postShutdown

protected void postShutdown()

getShutdownType

public java.lang.String getShutdownType()

Get shutdown type

Returns:

controller,database or backend

getShutdownLevel

public int getShutdownLevel()

Get shutdown level

Returns:

level

abortShutdown

public void abortShutdown(java.lang.Exception cause)

If shutdown fails ...

Parameters:

cause - why shutdown was aborted

shutdownSmart

public abstract void shutdownSmart()
                            throws ShutdownException

Wait for all clients to finish transaction and disconnect. Then disable all backends for checkpoints.

Throws:

ShutdownException - if fails

shutdownFast

public abstract void shutdownFast()
                           throws ShutdownException

Wait for all clients to finish transaction and then force disconnection. Then disable backends for checkpoint. This shutdown method does not need recovery.

Throws:

ShutdownException - if fails

shutdownImmediate

public abstract void shutdownImmediate()
                                throws ShutdownException

Force immediate shutdown. This method needs recovery at next start up.

Throws:

ShutdownException - if fails

getShutdownGroup

public java.lang.ThreadGroup getShutdownGroup()

Returns the shutdownGroup value.

Returns:

Returns the shutdownGroup.