org.objectweb.fractal.julia.control.lifecycle
Class BasicLifeCycleCoordinatorMixin

java.lang.Object
  org.objectweb.fractal.julia.control.lifecycle.BasicLifeCycleCoordinatorMixin

All Implemented Interfaces:

LifeCycleController, LifeCycleCoordinator

public abstract class BasicLifeCycleCoordinatorMixin
extends Object
implements LifeCycleCoordinator

Provides an abstract implementation of the LifeCycleCoordinator interface.

Requirements

• the component to which this controller object belongs must provide the Component interface.

Field Summary

Component	_this_weaveableC The weaveableC field required by this mixin.
List	fcActive The components that are currently active.

Fields inherited from interface org.objectweb.fractal.api.control.LifeCycleController

STARTED, STOPPED

Method Summary

boolean	fcActivated(LifeCycleCoordinator component) Notifies this component that the given component is about to become active.
void	fcInactivated(LifeCycleCoordinator component) Notifies this component that the given component has become inactive.
void	setFcState(boolean started) Sets the lifecycle state of this component and of all its direct and indirect sub components that have a LifeCycleCoordinator interface.
void	stopFc(LifeCycleCoordinator[] components) Stops the given components simultaneously.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.objectweb.fractal.julia.control.lifecycle.LifeCycleCoordinator

setFcStarted, setFcStopped, setFcStopping

Methods inherited from interface org.objectweb.fractal.api.control.LifeCycleController

getFcState, startFc, stopFc

Field Detail

fcActive

public List fcActive

The components that are currently active.

_this_weaveableC

public Component _this_weaveableC

The weaveableC field required by this mixin. This field is supposed to reference the Component interface of the component to which this controller object belongs.

Method Detail

setFcState

public void setFcState(boolean started)
                throws IllegalLifeCycleException

Sets the lifecycle state of this component and of all its direct and indirect sub components that have a LifeCycleCoordinator interface.

Parameters:

started - true to set the lifecycle state of the components to STARTED, or false to set this state to STOPPED.

Throws:

IllegalLifeCycleException - if a problem occurs.

fcActivated

public boolean fcActivated(LifeCycleCoordinator component)

Description copied from interface: LifeCycleCoordinator

Notifies this component that the given component is about to become active. This method must be called by a component when the following conditions are met:

• the component is stopping, i.e., its setFcStopping method has been called.
• the component is not yet stopped, i.e., its setFcStopped method has not been called yet.
• the component is currently inactive, but a new activity is about to start in this component.

Specified by:

fcActivated in interface LifeCycleCoordinator

Parameters:

component - the LifeCycleCoordinator interface of a component that is about to become active.

Returns:

true if the given component can become active, or false if the new activity must be delayed until the component is restarted.

fcInactivated

public void fcInactivated(LifeCycleCoordinator component)

Description copied from interface: LifeCycleCoordinator

Notifies this component that the given component has become inactive. This method must be called by a component when the following conditions are met:

• the component is stopping, i.e., its setFcStopping method has been called.
• the component is not yet stopped, i.e., its setFcStopped method has not been called yet.
• the component has become inactive.

Specified by:

fcInactivated in interface LifeCycleCoordinator

Parameters:

component - the LifeCycleCoordinator interface of a component that has become inactive.

stopFc

public void stopFc(LifeCycleCoordinator[] components)
            throws IllegalLifeCycleException

Stops the given components simultaneously. This method sets the state of the components to "STOPPING", waits until all the components are simultaneoulsy inactive (their state is known thanks to the fcActivated and fcInactivated callback methods), and then sets the state of the components to STOPPED.

Parameters:

components - the LifeCycleCoordinator interface of the components to be stopped.

Throws:

IllegalLifeCycleException - if a problem occurs.