/*
* 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.sample.generation;
import org.apache.cocoon.pipeline.caching.AbstractCacheKey;
import org.apache.cocoon.pipeline.caching.CacheKey;
import org.apache.cocoon.pipeline.component.CachingPipelineComponent;
import org.apache.cocoon.pipeline.util.MurmurHashCodeBuilder;
public class CachingTimestampGenerator extends TimestampGenerator implements CachingPipelineComponent {
private static final int CACHING_PERIOD = 1500;
public CacheKey constructCacheKey() {
return new CacheKeyImplementation(System.currentTimeMillis());
}
private final class CacheKeyImplementation extends AbstractCacheKey {
private static final long serialVersionUID = 1L;
private final long timestamp;
public CacheKeyImplementation(long timestamp) {
this.timestamp = timestamp;
}
@Override
public boolean equals(Object obj) {
return obj instanceof CacheKeyImplementation;
}
public long getLastModified() {
return this.timestamp;
}
@Override
public int hashCode() {
return new MurmurHashCodeBuilder().append(this.getClass().getName()).toHashCode();
}
public boolean isValid(CacheKey other) {
if (!(other instanceof CacheKeyImplementation)) {
return false;
}
CacheKeyImplementation otherCacheKey = (CacheKeyImplementation) other;
return Math.abs(this.timestamp - otherCacheKey.timestamp) < CACHING_PERIOD;
}
}
}