Tomcat example source code file (HomesUserDatabase.java)

This example Tomcat source code file (HomesUserDatabase.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Tomcat tags/keywords

enumeration, file, file, hashtable, hashtable, homesuserdatabase, io, string, string, userconfig, userconfig, userdatabase, util

The Tomcat HomesUserDatabase.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package org.apache.catalina.startup;


import java.io.File;
import java.util.Hashtable;
import java.util.Enumeration;


/**
 * Concrete implementation of the <strong>UserDatabase interface
 * considers all directories in a directory whose pathname is specified
 * to our constructor to be "home" directories for those users.
 *
 * @author Craig R. McClanahan
 * @version $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
 */

public final class HomesUserDatabase
    implements UserDatabase {


    // --------------------------------------------------------- Constructors


    /**
     * Initialize a new instance of this user database component.
     */
    public HomesUserDatabase() {

        super();

    }


    // --------------------------------------------------- Instance Variables


    /**
     * The set of home directories for all defined users, keyed by username.
     */
    private Hashtable homes = new Hashtable();


    /**
     * The UserConfig listener with which we are associated.
     */
    private UserConfig userConfig = null;


    // ----------------------------------------------------------- Properties


    /**
     * Return the UserConfig listener with which we are associated.
     */
    public UserConfig getUserConfig() {

        return (this.userConfig);

    }


    /**
     * Set the UserConfig listener with which we are associated.
     *
     * @param userConfig The new UserConfig listener
     */
    public void setUserConfig(UserConfig userConfig) {

        this.userConfig = userConfig;
        init();

    }


    // ------------------------------------------------------- Public Methods


    /**
     * Return an absolute pathname to the home directory for the specified user.
     *
     * @param user User for which a home directory should be retrieved
     */
    public String getHome(String user) {

        return ((String) homes.get(user));

    }


    /**
     * Return an enumeration of the usernames defined on this server.
     */
    public Enumeration getUsers() {

        return (homes.keys());

    }


    // ------------------------------------------------------ Private Methods


    /**
     * Initialize our set of users and home directories.
     */
    private void init() {

        String homeBase = userConfig.getHomeBase();
        File homeBaseDir = new File(homeBase);
        if (!homeBaseDir.exists() || !homeBaseDir.isDirectory())
            return;
        String homeBaseFiles[] = homeBaseDir.list();

        for (int i = 0; i < homeBaseFiles.length; i++) {
            File homeDir = new File(homeBaseDir, homeBaseFiles[i]);
            if (!homeDir.isDirectory() || !homeDir.canRead())
                continue;
            homes.put(homeBaseFiles[i], homeDir.toString());
        }


    }


}