| /* |
| * $Header: /cvshome/build/org.osgi.framework/src/org/osgi/framework/BundleActivator.java,v 1.8 2005/06/21 16:22:12 hargrave Exp $ |
| * |
| * Copyright (c) OSGi Alliance (2000, 2005). 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. |
| */ |
| |
| package org.osgi.framework; |
| |
| /** |
| * Customizes the starting and stopping of a bundle. |
| * <p> |
| * <code>BundleActivator</code> is an interface that may be implemented when a |
| * bundle is started or stopped. The Framework can create instances of a |
| * bundle's <code>BundleActivator</code> as required. If an instance's |
| * <code>BundleActivator.start</code> method executes successfully, it is |
| * guaranteed that the same instance's <code>BundleActivator.stop</code> method |
| * will be called when the bundle is to be stopped. |
| * |
| * <p> |
| * <code>BundleActivator</code> is specified through the <code>Bundle-Activator</code> |
| * Manifest header. A bundle can only specify a single <code>BundleActivator</code> |
| * in the Manifest file. Fragment bundles must not have a <code>BundleActivator</code>. |
| * 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 <code>BundleActivator</code> class must have a public constructor |
| * that takes no parameters so that a <code>BundleActivator</code> object can be |
| * created by <code>Class.newInstance()</code>. |
| * |
| * @version $Revision: 1.8 $ |
| */ |
| |
| 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 <code>BundleActivator.start</code> |
| * method started. There should be no active threads that were started by |
| * this bundle when this bundle returns. A stopped bundle must |
| * 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; |
| } |
| |