org.crac

Class Context<R extends Resource>

java.lang.Object

org.crac.Context<R>

All Implemented Interfaces:

Resource

public abstract class Context<R extends Resource>
extends Object
implements Resource

A Resource that allows other Resources to be registered with it.

Context implementation overrides beforeCheckpoint and afterRestore, defining how the notification about checkpoint and restore will be distributed by the Context hierarchy.

A Context implementor is encouraged to respect properties of the global Context.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Context() Creates a Context.

Method Summary

Modifier and Type	Method and Description
abstract void	afterRestore(Context<? extends Resource> context) Invoked by a Context as a notification about restore.
abstract void	beforeCheckpoint(Context<? extends Resource> context) Invoked by a Context as a notification about checkpoint.
abstract void	register(R resource) Registers a Resource with this Context.

Methods inherited from class java.lang.Object

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

Constructor Detail

Context

protected Context()

Creates a Context.

Method Detail

beforeCheckpoint

public abstract void beforeCheckpoint(Context<? extends Resource> context)
                               throws CheckpointException

Description copied from interface: Resource

Invoked by a Context as a notification about checkpoint.

Specified by:

beforeCheckpoint in interface Resource

Parameters:

context - Context providing notification

Throws:

CheckpointException

afterRestore

public abstract void afterRestore(Context<? extends Resource> context)
                           throws RestoreException

Description copied from interface: Resource

Invoked by a Context as a notification about restore.

Specified by:

afterRestore in interface Resource

Parameters:

context - Context providing notification

Throws:

RestoreException

register

public abstract void register(R resource)

Registers a Resource with this Context.

Parameters:

resource - Resource to be registered.

Throws:

NullPointerException - if resource is null