/**
* 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.camel.processor.idempotent;
import java.util.HashMap;
import java.util.Map;
import org.apache.camel.util.LRUCache;
/**
* A memory based implementation of {@link MessageIdRepository}. Care should be
* taken to use a suitable underlying {@link Map} to avoid this class being a
* memory leak
*
* @version $Revision: 630568 $
*/
public class MemoryMessageIdRepository implements MessageIdRepository {
private Map cache;
public MemoryMessageIdRepository(Map set) {
this.cache = set;
}
/**
* Creates a new MemoryMessageIdRepository with a memory based respository.
* <b>Warning</b> this method should only really be used for testing as it
* will involve keeping all message IDs in RAM.
*/
public static MessageIdRepository memoryMessageIdRepository() {
return memoryMessageIdRepository(new HashMap());
}
/**
* Creates a new MemoryMessageIdRepository with a memory based respository.
* <b>Warning</b> this method should only really be used for testing as it
* will involve keeping all message IDs in RAM.
*/
public static MessageIdRepository memoryMessageIdRepository(int cacheSize) {
return memoryMessageIdRepository(new LRUCache(cacheSize));
}
/**
* Creates a new MemoryMessageIdRepository using the given {@link Map} to
* use to store the processed Message ID objects. Warning be cafeful of the
* implementation of Map you use as if you are not careful it could be a
* memory leak.
*/
public static MessageIdRepository memoryMessageIdRepository(Map cache) {
return new MemoryMessageIdRepository(cache);
}
public boolean contains(String messageId) {
synchronized (cache) {
if (cache.containsKey(messageId)) {
return true;
} else {
cache.put(messageId, messageId);
return false;
}
}
}
}