er.extensions.components

Class ERXGracefulShutdown

java.lang.Object

er.extensions.components.ERXGracefulShutdown

All Implemented Interfaces:

sun.misc.SignalHandler

public class ERXGracefulShutdown
extends Object
implements sun.misc.SignalHandler

Graceful shutdown adds signal handling support for gracefully terminating a WOApplication. The default implementation in ERXApplication simply calls the terminate method. By default only the TERM and INT signals are registered to handle.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ERXGracefulShutdown.GracefulApplication Interface to be implemented by the WOApplication subclass to gracefully handle termination.

Field Summary

Fields

Modifier and Type	Field and Description
protected sun.misc.SignalHandler	defaultHandler caches the previous handler for chaining

Fields inherited from interface sun.misc.SignalHandler

SIG_DFL, SIG_IGN

Constructor Summary

Constructors

Constructor and Description
ERXGracefulShutdown()

Method Summary

Modifier and Type	Method and Description
sun.misc.SignalHandler	defaultHandler()
void	handle(sun.misc.Signal signal) Signal handling method.
static void	installHandler() Installs signal handlers for the given array of signals.
static boolean	isEnabled() Determines if signal handling is enabled.
void	setDefaultHandler(sun.misc.SignalHandler value)

Methods inherited from class java.lang.Object

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

Field Detail

defaultHandler

protected sun.misc.SignalHandler defaultHandler

caches the previous handler for chaining

Constructor Detail

ERXGracefulShutdown

public ERXGracefulShutdown()

Method Detail

isEnabled

public static boolean isEnabled()

Determines if signal handling is enabled. Defaults to false.

Returns:

if signal handling is enabled

installHandler

public static void installHandler()

Installs signal handlers for the given array of signals. Default signals to catch are TERM and INT. The previous handler is saved to chain back to if anything goes wrong with the graceful termination method.

handle

public void handle(sun.misc.Signal signal)

Signal handling method. Gracefully terminates the currently running WOApplication.

Specified by:

handle in interface sun.misc.SignalHandler

Parameters:

signal - to be handled

defaultHandler

public sun.misc.SignalHandler defaultHandler()

Returns:

the default handler

setDefaultHandler

public void setDefaultHandler(sun.misc.SignalHandler value)