/* * $Header: /cvshome/repository/org/osgi/framework/BundleActivator.java,v 1.6 2002/10/07 07:13:34 pkriens Exp $ * * Copyright (c) The Open Services Gateway Initiative (2000-2001). * All Rights Reserved. * * Implementation of certain elements of the Open Services Gateway Initiative * (OSGI) Specification may be subject to third party intellectual property * rights, including without limitation, patent rights (such a third party may * or may not be a member of OSGi). OSGi is not responsible and shall not be * held responsible in any manner for identifying or failing to identify any or * all such third party intellectual property rights. * * This document and the information contained herein are provided on an "AS * IS" basis and OSGI DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL * NOT INFRINGE ANY RIGHTS AND ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL OSGI BE LIABLE FOR ANY * LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OF DATA, INTERRUPTION OF * BUSINESS, OR FOR DIRECT, INDIRECT, SPECIAL OR EXEMPLARY, INCIDENTIAL, * PUNITIVE OR CONSEQUENTIAL DAMAGES OF ANY KIND IN CONNECTION WITH THIS * DOCUMENT OR THE INFORMATION CONTAINED HEREIN, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH LOSS OR DAMAGE. * * All Company, brand and product names may be trademarks that are the sole * property of their respective owners. All rights reserved. */package org.osgi.framework;/** * Customizes the starting and stopping of this bundle. * <p><tt>BundleActivator</tt> is an interface that may be implemented * when this bundle is started or stopped. The Framework can create instances of this bundle's * <tt>BundleActivator</tt> as required. If an instance's <tt>BundleActivator.start</tt> * method executes successfully, it is guaranteed that the same instance's <tt>BundleActivator.stop</tt> * method will be called when this bundle is to be stopped. * * <p><tt>BundleActivator</tt> is specified through the * <tt>Bundle-Activator</tt> Manifest header. A bundle can only specify * a single <tt>BundleActivator</tt> in the Manifest file. * The form of the Manifest header is: * <pre> * Bundle-Activator: <i>class-name</i> * </pre> * where <code>class-name</code> is a fully qualified Java classname. * <p>The specified <tt>BundleActivator</tt> class must have a public constructor * that takes no parameters so that a <tt>BundleActivator</tt> object can * be created by <tt>Class.newInstance()</tt>. * * @version $Revision: 1.6 $ * @author Open Services Gateway Initiative */public abstract interface BundleActivator{    /**     * Called when this bundle is started so the Framework can perform the bundle-specific     * activities necessary to start this bundle. This method can be used to register services or to     * allocate any resources that this bundle needs.     *     * <p>This method must complete and return to its caller in a timely manner.     *     * @param context The execution context of the bundle being started.     * @exception java.lang.Exception If this method throws an exception, this bundle is marked     * as stopped and the Framework will remove this bundle's listeners, unregister all services     * registered by this bundle, and release all services used by this bundle.     * @see Bundle#start     */    public abstract void start(BundleContext context) throws Exception;    /**     * Called when this bundle is stopped so the Framework can perform the bundle-specific     * activities necessary to stop the bundle.     * In general, this method should undo the work that the <tt>BundleActivator.start</tt> method started.     * There should be no active threads that were started by this bundle when this bundle returns.     * A stopped bundle should be stopped and should not call any Framework objects.     *     * <p>This method must complete and return to its caller in a timely manner.     *     * @param context The execution context of the bundle being stopped.     * @exception java.lang.Exception If this method throws an exception,     * the bundle is still marked as stopped, and the Framework will     * remove the bundle's listeners, unregister all services     * registered by the bundle, and release all services     * used by the bundle.     * @see Bundle#stop     */    public abstract void stop(BundleContext context) throws Exception;}