Plugin.java 2.87 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
/**
 * $RCSfile$
 * $Revision: 1217 $
 * $Date: 2005-04-11 18:11:06 -0300 (Mon, 11 Apr 2005) $
 *
 * Copyright (C) 2004 Jive Software. All rights reserved.
 *
 * This software is published under the terms of the GNU Public License (GPL),
 * a copy of which is included in this distribution.
 */

package org.jivesoftware.wildfire.container;

import java.io.File;

/**
 * Plugin interface. Plugins enhance the functionality of Wildfire. They can:<ul>
 *
 *      <li>Act as {@link org.xmpp.component.Component Components} to implement
 *      additional features in the XMPP protocol.
 *      <li>Dynamically modify the admin console.
22
 *      <li>Use the Wildfire API to add new functionality to the server.
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
 * </ul>
 *
 * Plugins live in the <tt>plugins</tt> directory of <tt>home</tt>. Plugins
 * that are packaged as JAR files will be automatically expanded into directories. A
 * plugin directory should have the following structure:
 *
 * <pre>[pluginDir]
 *    |-- plugin.xml
 *    |-- classes/
 *    |-- lib/</pre>
 *
 * The <tt>classes</tt> and <tt>lib</tt> directory are optional. Any files in the
 * <tt>classes</tt> directory will be added to the classpath of the plugin, as well
 * as any JAR files in the <tt>lib</tt> directory. The <tt>plugin.xml</tt> file is
 * required, and specifies the className of the Plugin implementation. The XML file
 * should resemble the following XML:
 *
 * <pre>
 * &lt;?xml version="1.0" encoding="UTF-8"?&gt;
 * &lt;plugin&gt;
 *     &lt;class&gt;org.example.YourPlugin&lt;/class&gt;
 *     &lt;name&gt;Example Plugin&lt;/name&gt;
 *     &lt;description&gt;This is an example plugin.&lt;/description&gt;
 *     &lt;author&gt;Foo Inc.&lt;/author&gt;
 *     &lt;version&gt;1.0&lt;/version&gt;
48 49
 *     &lt;minServerVersion&gt;3.0.0&lt;/minServerVersion&gt;
 *     &lt;licenseType&gt;gpl&lt;/licenseType&gt;
50
 * &lt;/plugin&gt;</pre>
51 52 53
 * <p/>
 * Each plugin will be loaded in its own class loader, unless the plugin is configured
 * with a parent plugin.<p/>
54
 *
55 56
 * Please see the Plugin Developer Guide (available with the
 * Wildfire documentation) for additional details about plugin development.
57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
 *
 * @author Matt Tucker
 */
public interface Plugin {

    /**
     * Initializes the plugin.
     *
     * @param manager the plugin manager.
     * @param pluginDirectory the directory where the plugin is located.
     */
    public void initializePlugin(PluginManager manager, File pluginDirectory);

    /**
     * Destroys the plugin.<p>
     *
     * Implementations of this method must release all resources held
     * by the plugin such as file handles, database or network connections,
     * and references to core Wildfire classes. In other words, a
     * garbage collection executed after this method is called must be able
     * to clean up all plugin classes.
     */
    public void destroyPlugin();

}