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/*
* Copyright (c) 2007-2009, 2011, 2012 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.net4j.util.lifecycle;
import org.eclipse.net4j.util.event.INotifier;
/**
* An entity that has a well-defined {@link #getLifecycleState() lifecycle} and can be {@link #activate() activated} or
* {@link #deactivate() deactivated}.
* <p>
* A lifecycle can fire the following events:
* <ul>
* <li> {@link ILifecycleEvent} before and after the {@link #getLifecycleState() state} of this lifecycle changes.
* </ul>
*
* @author Eike Stepper
* @apiviz.landmark
* @apiviz.has {@link LifecycleState}
* @apiviz.uses {@link ILifecycleEvent} - - fires
* @apiviz.excludeSubtypes
*/
public interface ILifecycle extends INotifier
{
public void activate() throws LifecycleException;
public Exception deactivate();
/**
* @since 3.0
*/
public LifecycleState getLifecycleState();
/**
* @since 3.0
*/
public boolean isActive();
/**
* A mix-in interface for {@link ILifecycle lifecycles} with deferrable activation.
*
* @author Eike Stepper
* @since 3.2
*/
public interface DeferrableActivation
{
public boolean isDeferredActivation();
}
}
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