| /******************************************************************************* |
| * 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.ofbiz.base.util.cache.impl; |
| |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.ofbiz.base.util.Debug; |
| import org.ofbiz.base.util.cache.CacheManager; |
| |
| /** |
| * Generalized caching utility. Provides a number of caching features: |
| * <ul> |
| * <li>Limited or unlimited element capacity |
| * <li>If limited, removes elements with the LRU (Least Recently Used) algorithm |
| * <li>Keeps track of when each element was loaded into the cache |
| * <li>Using the expireTime can report whether a given element has expired |
| * <li>Counts misses and hits |
| * </ul> |
| * |
| */ |
| @SuppressWarnings("serial") |
| public class OFBizCacheManager implements CacheManager { |
| |
| public static final String module = OFBizCacheManager.class.getName(); |
| |
| /** A static Map to keep track of all of the UtilCache instances. */ |
| private final ConcurrentHashMap<String, OFBizCache<?, ?>> ofbizCacheTable = new ConcurrentHashMap<String, OFBizCache<?, ?>>(); |
| |
| /** An index number appended to utilCacheTable names when there are conflicts. */ |
| private final ConcurrentHashMap<String, AtomicInteger> defaultIndices = new ConcurrentHashMap<String, AtomicInteger>(); |
| |
| /** The name of the UtilCache instance, is also the key for the instance in utilCacheTable. */ |
| private final String name; |
| |
| // weak ref on this |
| private static final ConcurrentMap<String, JdbmRecordManager> fileManagers = new ConcurrentHashMap<String, JdbmRecordManager>(); |
| |
| //TODO: Totally wrong description |
| /** Constructor which specifies the cacheName as well as the sizeLimit, expireTime and useSoftReference. |
| * The passed sizeLimit, expireTime and useSoftReference will be overridden by values from cache.properties if found. |
| * @param sizeLimit The sizeLimit member is set to this value |
| * @param expireTime The expireTime member is set to this value |
| * @param cacheName The name of the cache. |
| * @param useSoftReference Specifies whether or not to use soft references for this cache. |
| */ |
| public OFBizCacheManager(String name) { |
| this.name = name; |
| } |
| |
| public JdbmRecordManager getJdbmRecordManager(String fileStore) { |
| // create the manager the first time it is needed |
| JdbmRecordManager jdbmMgr = fileManagers.get(fileStore); |
| if (jdbmMgr == null) { |
| Debug.logImportant("Creating file system cache store for cache manager with name: " + this.name, module); |
| try { |
| String ofbizHome = System.getProperty("ofbiz.home"); |
| if (ofbizHome == null) { |
| Debug.logError("No ofbiz.home property set in environment", module); |
| } else { |
| jdbmMgr = new JdbmRecordManager(ofbizHome + "/" + fileStore); |
| } |
| } catch (IOException e) { |
| Debug.logError(e, "Error creating file system cache store for cache manager with name: " + this.name, module); |
| } |
| fileManagers.putIfAbsent(fileStore, jdbmMgr); |
| } |
| return fileManagers.get(fileStore); |
| } |
| |
| private String getNextDefaultIndex(String cacheName) { |
| AtomicInteger curInd = defaultIndices.get(cacheName); |
| if (curInd == null) { |
| defaultIndices.putIfAbsent(cacheName, new AtomicInteger(0)); |
| curInd = defaultIndices.get(cacheName); |
| } |
| int i = curInd.getAndIncrement(); |
| return i == 0 ? "" : Integer.toString(i); |
| } |
| |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#clearAllCaches() |
| */ |
| @Override |
| public void clearAllCaches() { |
| // We make a copy since clear may take time |
| for (OFBizCache<?,?> cache : ofbizCacheTable.values()) { |
| cache.clear(); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#getUtilCacheTableKeySet() |
| */ |
| @Override |
| public Set<String> getUtilCacheTableKeySet() { |
| Set<String> set = new HashSet<String>(ofbizCacheTable.size()); |
| set.addAll(ofbizCacheTable.keySet()); |
| return set; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#getName() |
| */ |
| @Override |
| public String getName() { |
| return this.name; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#validKey(java.lang.String, java.lang.Object) |
| */ |
| @Override |
| public boolean validKey(String cacheName, Object key) { |
| OFBizCache<?, ?> cache = findCache(cacheName); |
| if (cache != null) { |
| if (cache.containsKey(key)) |
| return true; |
| } |
| return false; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#clearCachesThatStartWith(java.lang.String) |
| */ |
| @Override |
| public void clearCachesThatStartWith(String startsWith) { |
| for (Map.Entry<String, OFBizCache<?, ?>> entry: ofbizCacheTable.entrySet()) { |
| String name = entry.getKey(); |
| if (name.startsWith(startsWith)) { |
| OFBizCache<?, ?> cache = entry.getValue(); |
| cache.clear(); |
| } |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#clearCache(java.lang.String) |
| */ |
| @Override |
| public void clearCache(String cacheName) { |
| OFBizCache<?, ?> cache = findCache(cacheName); |
| if (cache == null) return; |
| cache.clear(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#getOrCreateUtilCache(java.lang.String, int, int, long, boolean, boolean, java.lang.String) |
| */ |
| @Override |
| @SuppressWarnings("unchecked") |
| public <K, V> OFBizCache<K, V> getOrCreateCache(String name, int sizeLimit, int maxInMemory, long expireTime, boolean useSoftReference, boolean useFileSystemStore, String... names) { |
| OFBizCache<K, V> existingCache = (OFBizCache<K, V>) ofbizCacheTable.get(name); |
| if (existingCache != null) return existingCache; |
| String cacheName = name + getNextDefaultIndex(name); |
| OFBizCache<K, V> newCache = new OFBizCache<K, V>(this, cacheName, sizeLimit, maxInMemory, expireTime, useSoftReference, useFileSystemStore, name, names); |
| ofbizCacheTable.putIfAbsent(name, newCache); |
| return (OFBizCache<K, V>) ofbizCacheTable.get(name); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#createUtilCache(java.lang.String, int, int, long, boolean, boolean, java.lang.String) |
| */ |
| @Override |
| public <K, V> OFBizCache<K, V> createCache(String name, int sizeLimit, int maxInMemory, long expireTime, boolean useSoftReference, boolean useFileSystemStore, String... names) { |
| String cacheName = name + getNextDefaultIndex(name); |
| return storeCache(new OFBizCache<K, V>(this, cacheName, sizeLimit, maxInMemory, expireTime, useSoftReference, useFileSystemStore, name, names)); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#createUtilCache(java.lang.String, int, int, long, boolean, boolean) |
| */ |
| @Override |
| public <K, V> OFBizCache<K, V> createCache(String name, int sizeLimit, int maxInMemory, long expireTime, boolean useSoftReference, boolean useFileSystemStore) { |
| String cacheName = name + getNextDefaultIndex(name); |
| return storeCache(new OFBizCache<K, V>(this, cacheName, sizeLimit, maxInMemory, expireTime, useSoftReference, useFileSystemStore, name)); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#createUtilCache(java.lang.String, int, long, boolean) |
| */ |
| @Override |
| public <K,V> OFBizCache<K, V> createCache(String name, int sizeLimit, long expireTime, boolean useSoftReference) { |
| String cacheName = name + getNextDefaultIndex(name); |
| return storeCache(new OFBizCache<K, V>(this, cacheName, sizeLimit, sizeLimit, expireTime, useSoftReference, false, name)); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#createUtilCache(java.lang.String, int, long) |
| */ |
| @Override |
| public <K,V> OFBizCache<K, V> createCache(String name, int sizeLimit, long expireTime) { |
| String cacheName = name + getNextDefaultIndex(name); |
| return storeCache(new OFBizCache<K, V>(this, cacheName, sizeLimit, sizeLimit, expireTime, false, false, name)); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#createUtilCache(int, long) |
| */ |
| @Override |
| public <K,V> OFBizCache<K, V> createCache(int sizeLimit, long expireTime) { |
| String cacheName = "specified" + getNextDefaultIndex("specified"); |
| return storeCache(new OFBizCache<K, V>(this, cacheName, sizeLimit, sizeLimit, expireTime, false, false, "specified")); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#createUtilCache(java.lang.String, boolean) |
| */ |
| @Override |
| public <K,V> OFBizCache<K, V> createCache(String name, boolean useSoftReference) { |
| String cacheName = name + getNextDefaultIndex(name); |
| return storeCache(new OFBizCache<K, V>(this, cacheName, 0, 0, 0, useSoftReference, false, "default", name)); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#createUtilCache(java.lang.String) |
| */ |
| @Override |
| public <K,V> OFBizCache<K, V> createCache(String name) { |
| String cacheName = name + getNextDefaultIndex(name); |
| return storeCache(new OFBizCache<K, V>(this, cacheName, 0, 0, 0, false, false, "default", name)); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#createUtilCache() |
| */ |
| @Override |
| public <K,V> OFBizCache<K, V> createCache() { |
| String cacheName = "default" + getNextDefaultIndex("default"); |
| return storeCache(new OFBizCache<K, V>(this, cacheName, 0, 0, 0, false, false, "default")); |
| } |
| |
| private <K, V> OFBizCache<K, V> storeCache(OFBizCache<K, V> cache) { |
| ofbizCacheTable.put(cache.getName(), cache); |
| return cache; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.ofbiz.base.util.cache.CacheManager#findCache(java.lang.String) |
| */ |
| @Override |
| @SuppressWarnings("unchecked") |
| public <K, V> OFBizCache<K, V> findCache(String cacheName) { |
| return (OFBizCache<K, V>) ofbizCacheTable.get(cacheName); |
| } |
| |
| } |