com.sun.appserv.web.taglibs.cache.CacheEntry Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of payara-micro Show documentation
Show all versions of payara-micro Show documentation
Micro Distribution of the Payara Project
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.appserv.web.taglibs.cache;
/**
* Class responsible for caching and expiring the execution result of a JSP
* fragment.
*/
public class CacheEntry
{
public static final int NO_TIMEOUT = -1;
String content;
volatile long expireTime;
/**
* Constructs a CacheEntry using the response string to be
* cached and the timeout after which the entry will expire
*/
public CacheEntry(String response, int timeout) {
content = response;
computeExpireTime(timeout);
}
/**
* set the real expire time
* @param expireTime in milli seconds
*/
public void setExpireTime(long expireTime) {
this.expireTime = expireTime;
}
/**
* Gets the cached content.
*
* @return The cached content
*/
public String getContent() {
return this.content;
}
/**
* compute when this entry to be expired based on timeout relative to
* current time.
* @param timeout in seconds
*/
public void computeExpireTime(int timeout) {
// timeout is relative to current time
this.expireTime = (timeout == NO_TIMEOUT) ? timeout :
System.currentTimeMillis() + (timeout * 1000L);
}
/**
* is this response still valid?
*/
public boolean isValid() {
return (expireTime > System.currentTimeMillis() ||
expireTime == NO_TIMEOUT);
}
/**
* clear the contents
*/
public void clear() {
content = null;
expireTime = 0L;
}
}