001: /*--
002:
003: Copyright (C) 2000-2003 Anthony Eden.
004: All rights reserved.
005:
006: Redistribution and use in source and binary forms, with or without
007: modification, are permitted provided that the following conditions
008: are met:
009:
010: 1. Redistributions of source code must retain the above copyright
011: notice, this list of conditions, and the following disclaimer.
012:
013: 2. Redistributions in binary form must reproduce the above copyright
014: notice, this list of conditions, and the disclaimer that follows
015: these conditions in the documentation and/or other materials
016: provided with the distribution.
017:
018: 3. The name "EdenLib" must not be used to endorse or promote products
019: derived from this software without prior written permission. For
020: written permission, please contact me@anthonyeden.com.
021:
022: 4. Products derived from this software may not be called "EdenLib", nor
023: may "EdenLib" appear in their name, without prior written permission
024: from Anthony Eden (me@anthonyeden.com).
025:
026: In addition, I request (but do not require) that you include in the
027: end-user documentation provided with the redistribution and/or in the
028: software itself an acknowledgement equivalent to the following:
029: "This product includes software developed by
030: Anthony Eden (http://www.anthonyeden.com/)."
031:
032: THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
033: WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
034: OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
035: DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
036: INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
037: (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
038: SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
039: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
040: STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
041: IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
042: POSSIBILITY OF SUCH DAMAGE.
043:
044: For more information on EdenLib, please see <http://edenlib.sf.net/>.
045:
046: */
047:
048: package com.anthonyeden.lib.cache;
049:
050: /** A single entry in a cache. CacheEntry objects can include a specific
051: time to live which overrides the default time to live. If the time
052: to live is -1 then the default is used.
053:
054: @author Anthony Eden
055: @since 1.1
056: */
057:
058: public class CacheEntry {
059:
060: private Object object;
061: private int ttl;
062: private long insertTime;
063: private long lastRequestTime;
064:
065: /** Construct a new CacheEntry.
066:
067: @param object The cached object
068: @param insertTime The time when the object was inserted
069: */
070:
071: public CacheEntry(Object object, long insertTime) {
072: this (object, insertTime, -1);
073: }
074:
075: /** Construct a new CacheEntry with the given time to live.
076:
077: @param object The cached object
078: @param insertTime The time when the object was inserted
079: @param ttl The time to live of the entry
080: */
081:
082: public CacheEntry(Object object, long insertTime, int ttl) {
083: this .object = object;
084: this .insertTime = insertTime;
085: this .ttl = ttl;
086:
087: setLastRequestTime(insertTime);
088: }
089:
090: /** Get the cached object.
091:
092: @return The cached object
093: */
094:
095: public Object getObject() {
096: return object;
097: }
098:
099: /** Get the insert time.
100:
101: @return The insert time
102: */
103:
104: public long getInsertTime() {
105: return insertTime;
106: }
107:
108: /** Get the time to live.
109:
110: @return The time to live
111: */
112:
113: public int getTTL() {
114: return ttl;
115: }
116:
117: /** Set the time to live
118:
119: @param ttl The time to live
120: */
121:
122: public void setTTL(int ttl) {
123: this .ttl = ttl;
124: }
125:
126: /** Get the last request time.
127:
128: @return The last request time
129: */
130:
131: public long getLastRequestTime() {
132: return lastRequestTime;
133: }
134:
135: /** Set the last request time.
136:
137: @param lastRequestTime The last request time
138: */
139:
140: public void setLastRequestTime(long lastRequestTime) {
141: this.lastRequestTime = lastRequestTime;
142: }
143:
144: }
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