| /* |
| * 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.util.murmurhash.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; |
| } |
| } |
| } |