001: /*
002: * $Id: RequestCache.java,v 1.3 2002/03/22 04:55:07 skavish Exp $
003: *
004: * ==========================================================================
005: *
006: * The JGenerator Software License, Version 1.0
007: *
008: * Copyright (c) 2000 Dmitry Skavish (skavish@usa.net). All rights reserved.
009: *
010: * Redistribution and use in source and binary forms, with or without
011: * modification, are permitted provided that the following conditions are met:
012: *
013: * 1. Redistributions of source code must retain the above copyright
014: * notice, this list of conditions and the following disclaimer.
015: *
016: * 2. Redistributions in binary form must reproduce the above copyright
017: * notice, this list of conditions and the following disclaimer in
018: * the documentation and/or other materials provided with the
019: * distribution.
020: *
021: * 3. The end-user documentation included with the redistribution, if
022: * any, must include the following acknowlegement:
023: * "This product includes software developed by Dmitry Skavish
024: * (skavish@usa.net, http://www.flashgap.com/)."
025: * Alternately, this acknowlegement may appear in the software itself,
026: * if and wherever such third-party acknowlegements normally appear.
027: *
028: * 4. The name "The JGenerator" must not be used to endorse or promote
029: * products derived from this software without prior written permission.
030: * For written permission, please contact skavish@usa.net.
031: *
032: * 5. Products derived from this software may not be called "The JGenerator"
033: * nor may "The JGenerator" appear in their names without prior written
034: * permission of Dmitry Skavish.
035: *
036: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
037: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
038: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
039: * DISCLAIMED. IN NO EVENT SHALL DMITRY SKAVISH OR THE OTHER
040: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
041: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
042: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
043: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
044: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
045: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
046: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
047: * SUCH DAMAGE.
048: *
049: */
050:
051: package org.openlaszlo.iv.flash.cache;
052:
053: import org.openlaszlo.iv.flash.api.*;
054: import org.openlaszlo.iv.flash.util.*;
055: import java.util.*;
056:
057: public class RequestCache extends GenericCache {
058:
059: private static RequestCache instance = new RequestCache();
060:
061: private RequestCache() {
062: }
063:
064: public static RequestCache getInstance() {
065: return instance;
066: }
067:
068: public static CacheSettings getSettings() {
069: return instance.getMySettings();
070: }
071:
072: /**
073: * Get cached request
074: *
075: * @param key cache key
076: */
077: public static FlashOutput getRequest(String key) {
078: CacheItem item = instance.getItem(key);
079: if (item == null)
080: return null;
081: return (FlashOutput) item.getObject();
082: }
083:
084: /**
085: * Add request to cache
086: *
087: * @param key cache key
088: * @param fob FlashOutput object to add
089: * @param lifespan time in milliseconds after which the request will be expired
090: */
091: public static void addRequest(String key, FlashOutput fob,
092: long lifespan) {
093: long now = System.currentTimeMillis();
094: if (lifespan < 0) {
095: lifespan = getSettings().getDefaultExpire();
096: }
097: if (lifespan == 0) {
098: lifespan = Long.MAX_VALUE - now;
099: }
100: long expire = now + lifespan;
101: CacheItem item = new CacheItem(key, fob, fob.getSize(), now,
102: expire);
103: instance.addItem(item);
104: }
105:
106: }
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