001: /*
002: * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/LifecycleEvent.java,v 1.3 2001/07/22 20:13:30 pier Exp $
003: * $Revision: 1.3 $
004: * $Date: 2001/07/22 20:13:30 $
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;
065:
066: import java.util.EventObject;
067:
068: /**
069: * General event for notifying listeners of significant changes on a component
070: * that implements the Lifecycle interface. In particular, this will be useful
071: * on Containers, where these events replace the ContextInterceptor concept in
072: * Tomcat 3.x.
073: *
074: * @author Craig R. McClanahan
075: * @version $Revision: 1.3 $ $Date: 2001/07/22 20:13:30 $
076: */
077:
078: public final class LifecycleEvent extends EventObject {
079:
080: // ----------------------------------------------------------- Constructors
081:
082: /**
083: * Construct a new LifecycleEvent with the specified parameters.
084: *
085: * @param lifecycle Component on which this event occurred
086: * @param type Event type (required)
087: */
088: public LifecycleEvent(Lifecycle lifecycle, String type) {
089:
090: this (lifecycle, type, null);
091:
092: }
093:
094: /**
095: * Construct a new LifecycleEvent with the specified parameters.
096: *
097: * @param lifecycle Component on which this event occurred
098: * @param type Event type (required)
099: * @param data Event data (if any)
100: */
101: public LifecycleEvent(Lifecycle lifecycle, String type, Object data) {
102:
103: super (lifecycle);
104: this .lifecycle = lifecycle;
105: this .type = type;
106: this .data = data;
107:
108: }
109:
110: // ----------------------------------------------------- Instance Variables
111:
112: /**
113: * The event data associated with this event.
114: */
115: private Object data = null;
116:
117: /**
118: * The Lifecycle on which this event occurred.
119: */
120: private Lifecycle lifecycle = null;
121:
122: /**
123: * The event type this instance represents.
124: */
125: private String type = null;
126:
127: // ------------------------------------------------------------- Properties
128:
129: /**
130: * Return the event data of this event.
131: */
132: public Object getData() {
133:
134: return (this .data);
135:
136: }
137:
138: /**
139: * Return the Lifecycle on which this event occurred.
140: */
141: public Lifecycle getLifecycle() {
142:
143: return (this .lifecycle);
144:
145: }
146:
147: /**
148: * Return the event type of this event.
149: */
150: public String getType() {
151:
152: return (this.type);
153:
154: }
155:
156: }
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