Source Code Cross Referenced for LinkedCacheFactoryImpl.java in  » Database-ORM » ODAL » com » completex » objective » components » ocache » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database ORM » ODAL » com.completex.objective.components.ocache.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package com.completex.objective.components.ocache.impl;
002:
003:        import com.completex.objective.components.ocache.*;
004:
005:        import java.util.HashMap;
006:        import java.util.Iterator;
007:
008:        /**
009:         * @author Gennady Krizhevsky
010:         */
011:        public class LinkedCacheFactoryImpl implements  OdalCacheFactory {
012:
013:            private ValueTransformer valueTransformer;
014:            private HashMap caches = new HashMap();
015:            private boolean initialized;
016:
017:            public void registerCache(OdalCache cache) {
018:                registerCache(cache, null);
019:            }
020:
021:            /**
022:             * Creates linked cache out of regular ones.
023:             * The first cache element is the master one. Its name will be returned by getName() method.
024:             *
025:             * @param cache
026:             * @param keyFactory
027:             * @throws OdalRuntimeCacheException if keyFactory is null or the cache is initialized (been used)
028:             */
029:            public synchronized void registerCache(OdalCache cache,
030:                    OdalKeyFactory keyFactory) {
031:                registerCache(cache, keyFactory, null);
032:            }
033:
034:            public void registerCache(OdalCache cache,
035:                    OdalKeyFactory keyFactory, OdalCacheConfig cacheConfig) {
036:                invalidateInitialized();
037:                if (keyFactory == null) {
038:                    throw new OdalRuntimeCacheException(
039:                            "OdalKeyFactory is null for LinkedCacheFactory");
040:                }
041:
042:                cacheConfig = OdalCacheConfig.merge(
043:                        DefaultCacheFactoryImpl.DEFAULT_CONFIG, cacheConfig);
044:                if (!cacheConfig.isDisabled()) {
045:                    if (!caches.containsKey(cache.getName())) {
046:                        OdalCache element = toOdalKeyedCache(cache, keyFactory,
047:                                cacheConfig.isMarkCacheCollectionElements());
048:                        caches.put(element.getName(), element);
049:                    } else {
050:                        throw new OdalRuntimeCacheException(
051:                                "Cache with name ["
052:                                        + cache.getName()
053:                                        + "] already existes in this LinkedCacheFactory");
054:                    }
055:                }
056:            }
057:
058:            protected OdalCache toOdalKeyedCache(OdalCache cache,
059:                    OdalKeyFactory keyFactory,
060:                    boolean markCacheCollectionElements) {
061:                if (!(cache instanceof  SafeLinkedCacheImpl)) {
062:                    if (!(cache instanceof  LinkedCacheImpl)) {
063:                        cache = new LinkedCacheImpl(cache, keyFactory,
064:                                valueTransformer, markCacheCollectionElements);
065:                    }
066:                    cache = new SafeLinkedCacheImpl(((LinkedCacheImpl) cache));
067:                }
068:                return cache;
069:            }
070:
071:            /**
072:             * Unregisters cache
073:             *
074:             * @param name
075:             * @throws OdalRuntimeCacheException if the cache is initialized (been used)
076:             */
077:            public synchronized void unregisterCache(String name) {
078:                invalidateInitialized();
079:                caches.remove(name);
080:            }
081:
082:            protected void invalidateInitialized() {
083:                if (initialized) {
084:                    throw new OdalRuntimeCacheException(
085:                            "LinkedCacheFactory is initialized and therefore immutable");
086:                }
087:            }
088:
089:            public synchronized OdalKeyedCache getCache(String name) {
090:                if (!initialized) {
091:                    initialize();
092:                }
093:                OdalKeyedCache cache = (OdalKeyedCache) caches.get(name);
094:                return cache == null ? OdalLinkedCache.NULL_ODAL_LINKED_CACHE
095:                        : cache;
096:            }
097:
098:            /**
099:             * Links all the registered caches
100:             */
101:            protected void initialize() {
102:                for (Iterator it = caches.keySet().iterator(); it.hasNext();) {
103:                    String key = (String) it.next();
104:                    OdalLinkedCache elementA = (OdalLinkedCache) caches
105:                            .get(key);
106:                    for (Iterator it2 = caches.keySet().iterator(); it2
107:                            .hasNext();) {
108:                        String key2 = (String) it2.next();
109:                        OdalLinkedCache elementB = (OdalLinkedCache) caches
110:                                .get(key2);
111:                        if (elementA != elementB) {
112:                            elementA.addListener(elementB);
113:                        }
114:                    }
115:                }
116:                initialized = true;
117:            }
118:
119:            public ValueTransformer getValueTransformer() {
120:                return valueTransformer;
121:            }
122:
123:            public void setValueTransformer(ValueTransformer valueTransformer) {
124:                this.valueTransformer = valueTransformer;
125:            }
126:
127:        }
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