| /** |
| * 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.Map; |
| |
| import org.apache.camel.impl.ServiceSupport; |
| import org.apache.camel.spi.IdempotentRepository; |
| import org.apache.camel.util.LRUCache; |
| import org.springframework.jmx.export.annotation.ManagedAttribute; |
| import org.springframework.jmx.export.annotation.ManagedOperation; |
| import org.springframework.jmx.export.annotation.ManagedResource; |
| |
| /** |
| * A memory based implementation of {@link org.apache.camel.spi.IdempotentRepository}. |
| * <p/> |
| * Care should be taken to use a suitable underlying {@link Map} to avoid this class being a |
| * memory leak. |
| * |
| * @version |
| */ |
| @ManagedResource("MemoryIdempotentRepository") |
| public class MemoryIdempotentRepository extends ServiceSupport implements IdempotentRepository<String> { |
| private Map<String, Object> cache; |
| private int cacheSize; |
| |
| public MemoryIdempotentRepository() { |
| this.cache = new LRUCache<String, Object>(1000); |
| } |
| |
| public MemoryIdempotentRepository(Map<String, Object> set) { |
| this.cache = set; |
| } |
| |
| /** |
| * Creates a new memory based repository using a {@link LRUCache} |
| * with a default of 1000 entries in the cache. |
| */ |
| public static IdempotentRepository<String> memoryIdempotentRepository() { |
| return new MemoryIdempotentRepository(); |
| } |
| |
| /** |
| * Creates a new memory based repository using a {@link LRUCache}. |
| * |
| * @param cacheSize the cache size |
| */ |
| public static IdempotentRepository<String> memoryIdempotentRepository(int cacheSize) { |
| return memoryIdempotentRepository(new LRUCache<String, Object>(cacheSize)); |
| } |
| |
| /** |
| * Creates a new memory based repository using the given {@link Map} to |
| * use to store the processed message ids. |
| * <p/> |
| * Care should be taken to use a suitable underlying {@link Map} to avoid this class being a |
| * memory leak. |
| * |
| * @param cache the cache |
| */ |
| public static IdempotentRepository<String> memoryIdempotentRepository(Map<String, Object> cache) { |
| return new MemoryIdempotentRepository(cache); |
| } |
| |
| @ManagedOperation(description = "Adds the key to the store") |
| public boolean add(String key) { |
| synchronized (cache) { |
| if (cache.containsKey(key)) { |
| return false; |
| } else { |
| cache.put(key, key); |
| return true; |
| } |
| } |
| } |
| |
| @ManagedOperation(description = "Does the store contain the given key") |
| public boolean contains(String key) { |
| synchronized (cache) { |
| return cache.containsKey(key); |
| } |
| } |
| |
| @ManagedOperation(description = "Remove the key from the store") |
| public boolean remove(String key) { |
| synchronized (cache) { |
| return cache.remove(key) != null; |
| } |
| } |
| |
| public boolean confirm(String key) { |
| // noop |
| return true; |
| } |
| |
| public Map<String, Object> getCache() { |
| return cache; |
| } |
| |
| @ManagedAttribute(description = "The current cache size") |
| public int getCacheSize() { |
| return cache.size(); |
| } |
| |
| public void setCacheSize(int cacheSize) { |
| this.cacheSize = cacheSize; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| if (cacheSize > 0) { |
| cache = new LRUCache<String, Object>(cacheSize); |
| } |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| cache.clear(); |
| } |
| } |