001: /*
002: * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/session/PersistentManager.java,v 1.10 2001/07/22 20:25:12 pier Exp $
003: * $Revision: 1.10 $
004: * $Date: 2001/07/22 20:25:12 $
005: *
006: * ====================================================================
007: *
008: * The Apache Software License, Version 1.1
009: *
010: * Copyright (c) 1999 The Apache Software Foundation. All rights
011: * reserved.
012: *
013: * Redistribution and use in source and binary forms, with or without
014: * modification, are permitted provided that the following conditions
015: * are met:
016: *
017: * 1. Redistributions of source code must retain the above copyright
018: * notice, this list of conditions and the following disclaimer.
019: *
020: * 2. Redistributions in binary form must reproduce the above copyright
021: * notice, this list of conditions and the following disclaimer in
022: * the documentation and/or other materials provided with the
023: * distribution.
024: *
025: * 3. The end-user documentation included with the redistribution, if
026: * any, must include the following acknowlegement:
027: * "This product includes software developed by the
028: * Apache Software Foundation (http://www.apache.org/)."
029: * Alternately, this acknowlegement may appear in the software itself,
030: * if and wherever such third-party acknowlegements normally appear.
031: *
032: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
033: * Foundation" must not be used to endorse or promote products derived
034: * from this software without prior written permission. For written
035: * permission, please contact apache@apache.org.
036: *
037: * 5. Products derived from this software may not be called "Apache"
038: * nor may "Apache" appear in their names without prior written
039: * permission of the Apache Group.
040: *
041: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
042: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
043: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
044: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
045: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
046: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
047: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
048: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
049: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
050: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
051: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
052: * SUCH DAMAGE.
053: * ====================================================================
054: *
055: * This software consists of voluntary contributions made by many
056: * individuals on behalf of the Apache Software Foundation. For more
057: * information on the Apache Software Foundation, please see
058: * <http://www.apache.org/>.
059: *
060: * [Additional notices, if required by prior licensing conditions]
061: *
062: */
063:
064: package org.apache.catalina.session;
065:
066: /**
067: * Implementation of the <b>Manager</b> interface that makes use of
068: * a Store to swap active Sessions to disk. It can be configured to
069: * achieve several different goals:
070: *
071: * <li>Persist sessions across restarts of the Container</li>
072: * <li>Fault tolerance, keep sessions backed up on disk to allow
073: * recovery in the event of unplanned restarts.</li>
074: * <li>Limit the number of active sessions kept in memory by
075: * swapping less active sessions out to disk.</li>
076: *
077: * @version $Revision: 1.10 $
078: * @author Kief Morris (kief@kief.com)
079: */
080:
081: public final class PersistentManager extends PersistentManagerBase {
082:
083: // ----------------------------------------------------- Instance Variables
084:
085: /**
086: * The descriptive information about this implementation.
087: */
088: private static final String info = "PersistentManager/1.0";
089:
090: /**
091: * The descriptive name of this Manager implementation (for logging).
092: */
093: protected static String name = "PersistentManager";
094:
095: // ------------------------------------------------------------- Properties
096:
097: /**
098: * Return descriptive information about this Manager implementation and
099: * the corresponding version number, in the format
100: * <code><description>/<version></code>.
101: */
102: public String getInfo() {
103:
104: return (this .info);
105:
106: }
107:
108: /**
109: * Return the descriptive short name of this Manager implementation.
110: */
111: public String getName() {
112:
113: return (name);
114:
115: }
116: }
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