001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.nio.intraband.cache;
016    
017    import com.liferay.portal.kernel.cache.CacheListener;
018    import com.liferay.portal.kernel.cache.CacheListenerScope;
019    import com.liferay.portal.kernel.cache.PortalCache;
020    import com.liferay.portal.kernel.io.Deserializer;
021    import com.liferay.portal.kernel.io.Serializer;
022    import com.liferay.portal.kernel.log.Log;
023    import com.liferay.portal.kernel.log.LogFactoryUtil;
024    import com.liferay.portal.kernel.nio.intraband.Datagram;
025    import com.liferay.portal.kernel.nio.intraband.IntraBand;
026    import com.liferay.portal.kernel.nio.intraband.RegistrationReference;
027    import com.liferay.portal.kernel.nio.intraband.SystemDataType;
028    
029    import java.io.Serializable;
030    
031    import java.nio.ByteBuffer;
032    
033    import java.util.ArrayList;
034    import java.util.Collection;
035    import java.util.List;
036    
037    /**
038     * @author Shuyang Zhou
039     */
040    public class IntraBandPortalCache
041                    <K extends Serializable, V extends Serializable>
042            implements PortalCache<K, V>, Serializable {
043    
044            public IntraBandPortalCache(
045                    String name, RegistrationReference registrationReference) {
046    
047                    _name = name;
048                    _registrationReference = registrationReference;
049    
050                    _intraBand = registrationReference.getIntraBand();
051    
052                    SystemDataType systemDataType = SystemDataType.PORTAL_CACHE;
053    
054                    _portalCacheType = systemDataType.getValue();
055            }
056    
057            public void destroy() {
058                    Serializer serializer = _createSerializer(
059                            PortalCacheActionType.DESTROY);
060    
061                    _intraBand.sendDatagram(
062                            _registrationReference,
063                            Datagram.createRequestDatagram(
064                                    _portalCacheType, serializer.toByteBuffer()));
065            }
066    
067            public Collection<V> get(Collection<K> keys) {
068                    Serializer serializer = _createSerializer(
069                            PortalCacheActionType.GET_BULK);
070    
071                    serializer.writeObject((Serializable)keys);
072    
073                    try {
074                            return (Collection<V>)_syncSend(serializer.toByteBuffer());
075                    }
076                    catch (Exception e) {
077                            if (_log.isWarnEnabled()) {
078                                    _log.warn("Unable to bulk get, coverting to cache miss", e);
079                            }
080    
081                            List<V> values = new ArrayList<V>(keys.size());
082    
083                            for (int i = 0; i < keys.size(); i++) {
084                                    values.add(null);
085                            }
086    
087                            return values;
088                    }
089            }
090    
091            public V get(K key) {
092                    Serializer serializer = _createSerializer(PortalCacheActionType.GET);
093    
094                    serializer.writeObject(key);
095    
096                    try {
097                            return _syncSend(serializer.toByteBuffer());
098                    }
099                    catch (Exception e) {
100                            if (_log.isWarnEnabled()) {
101                                    _log.warn("Unable to get, coverting to cache miss", e);
102                            }
103    
104                            return null;
105                    }
106            }
107    
108            public String getName() {
109                    return _name;
110            }
111    
112            public void put(K key, V value) {
113                    Serializer serializer = _createSerializer(PortalCacheActionType.PUT);
114    
115                    serializer.writeObject(key);
116                    serializer.writeObject(value);
117    
118                    _intraBand.sendDatagram(
119                            _registrationReference,
120                            Datagram.createRequestDatagram(
121                                    _portalCacheType, serializer.toByteBuffer()));
122            }
123    
124            public void put(K key, V value, int timeToLive) {
125                    Serializer serializer = _createSerializer(
126                            PortalCacheActionType.PUT_TTL);
127    
128                    serializer.writeObject(key);
129                    serializer.writeObject(value);
130                    serializer.writeInt(timeToLive);
131    
132                    _intraBand.sendDatagram(
133                            _registrationReference,
134                            Datagram.createRequestDatagram(
135                                    _portalCacheType, serializer.toByteBuffer()));
136            }
137    
138            public void registerCacheListener(CacheListener<K, V> cacheListener) {
139            }
140    
141            public void registerCacheListener(
142                    CacheListener<K, V> cacheListener,
143                    CacheListenerScope cacheListenerScope) {
144            }
145    
146            public void remove(K key) {
147                    Serializer serializer = _createSerializer(PortalCacheActionType.REMOVE);
148    
149                    serializer.writeObject(key);
150    
151                    _intraBand.sendDatagram(
152                            _registrationReference,
153                            Datagram.createRequestDatagram(
154                                    _portalCacheType, serializer.toByteBuffer()));
155            }
156    
157            public void removeAll() {
158                    Serializer serializer = _createSerializer(
159                            PortalCacheActionType.REMOVE_ALL);
160    
161                    _intraBand.sendDatagram(
162                            _registrationReference,
163                            Datagram.createRequestDatagram(
164                                    _portalCacheType, serializer.toByteBuffer()));
165            }
166    
167            public void unregisterCacheListener(CacheListener<K, V> cacheListener) {
168            }
169    
170            public void unregisterCacheListeners() {
171            }
172    
173            private Serializer _createSerializer(
174                    PortalCacheActionType portalCacheActionType) {
175    
176                    Serializer serializer = new Serializer();
177    
178                    serializer.writeInt(portalCacheActionType.ordinal());
179                    serializer.writeString(_name);
180    
181                    return serializer;
182            }
183    
184            private <T extends Serializable> T _syncSend(ByteBuffer byteBuffer)
185                    throws Exception {
186    
187                    Datagram responseDatagram = _intraBand.sendSyncDatagram(
188                            _registrationReference,
189                            Datagram.createRequestDatagram(_portalCacheType, byteBuffer));
190    
191                    Deserializer deserializer = new Deserializer(
192                            responseDatagram.getDataByteBuffer());
193    
194                    return deserializer.readObject();
195            }
196    
197            private static Log _log = LogFactoryUtil.getLog(IntraBandPortalCache.class);
198    
199            private final IntraBand _intraBand;
200            private final String _name;
201            private final byte _portalCacheType;
202            private final RegistrationReference _registrationReference;
203    
204    }