/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
*
*/
package org.apache.cocoon.pipeline.caching;
import org.apache.cocoon.pipeline.util.MurmurHashCodeBuilder;
/**
* A cache key implementation that expires after a defined number of seconds.
*/
public final class ExpiresCacheKey extends AbstractCacheKey {
private static final long serialVersionUID = 1L;
private final CacheKey cacheKey;
private final long timestamp;
private final long expirationTimestamp;
public ExpiresCacheKey(CacheKey cacheKey, String expires) {
this.cacheKey = cacheKey;
this.timestamp = System.currentTimeMillis();
this.expirationTimestamp = this.timestamp + Long.parseLong(expires) * 1000;
}
/**
* {@inheritDoc}
*
* @see org.apache.cocoon.pipeline.caching.CacheKey#isValid(org.apache.cocoon.pipeline.caching.CacheKey)
*/
public boolean isValid(CacheKey cacheKey) {
if (!(cacheKey instanceof ExpiresCacheKey)) {
return false;
}
ExpiresCacheKey other = (ExpiresCacheKey) cacheKey;
if (this.expirationTimestamp > other.timestamp) {
return true;
}
return this.cacheKey.isValid(other.cacheKey);
}
/**
* {@inheritDoc}
*
* @see org.apache.cocoon.pipeline.caching.CacheKey#getLastModified()
*/
public long getLastModified() {
return this.cacheKey.getLastModified();
}
public long getExpirationTimestamp() {
return this.expirationTimestamp;
}
/**
* {@inheritDoc}
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (!(obj instanceof ExpiresCacheKey)) {
return false;
}
ExpiresCacheKey other = (ExpiresCacheKey) obj;
return this.cacheKey.equals(other.cacheKey);
}
/**
* {@inheritDoc}
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return new MurmurHashCodeBuilder().append(this.getClass().getName()).append(this.cacheKey.hashCode())
.toHashCode();
}
}