Source Code Cross Referenced for ManagedObjectStateFactory.java in  » Net » Terracotta » com » tc » objectserver » managedobject » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » Terracotta » com.tc.objectserver.managedobject 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * All content copyright (c) 2003-2006 Terracotta, Inc., except as may otherwise be noted in a separate copyright
003:         * notice. All rights reserved.
004:         */
005:        package com.tc.objectserver.managedobject;
006:
007:        import EDU.oswego.cs.dl.util.concurrent.ConcurrentHashMap;
008:
009:        import com.tc.exception.TCRuntimeException;
010:        import com.tc.io.serializer.api.StringIndex;
011:        import com.tc.object.LiteralValues;
012:        import com.tc.object.ObjectID;
013:        import com.tc.object.dna.api.DNACursor;
014:        import com.tc.object.loaders.Namespace;
015:        import com.tc.objectserver.core.api.ManagedObjectState;
016:        import com.tc.objectserver.persistence.api.PersistentCollectionFactory;
017:        import com.tc.objectserver.persistence.api.Persistor;
018:        import com.tc.util.Assert;
019:
020:        import java.io.IOException;
021:        import java.io.ObjectInput;
022:        import java.util.Map;
023:
024:        /**
025:         * Creates state for managed objects
026:         */
027:        public class ManagedObjectStateFactory {
028:
029:            private static final LiteralValues literalValues = (LiteralValues) new LiteralValues();
030:            private static final Map classNameToStateMap = new ConcurrentHashMap();
031:            private final ManagedObjectChangeListenerProvider listenerProvider;
032:            private final StringIndex stringIndex;
033:            private final PhysicalManagedObjectStateFactory physicalMOFactory;
034:
035:            /**
036:             * I know singletons are BAD, but this way we save about 16 bytes for every shared object we store in the server and
037:             * that is huge ! So I can compromise here.
038:             */
039:            private static volatile ManagedObjectStateFactory singleton;
040:
041:            // this is present for tests
042:            private static boolean disableAssertions = false;
043:
044:            private final PersistentCollectionFactory persistentCollectionFactory;
045:
046:            static {
047:                classNameToStateMap.put(java.util.IdentityHashMap.class
048:                        .getName(), new Byte(ManagedObjectState.MAP_TYPE));
049:                classNameToStateMap.put(java.util.Hashtable.class.getName(),
050:                        new Byte(ManagedObjectState.PARTIAL_MAP_TYPE));
051:                classNameToStateMap.put(java.util.Properties.class.getName(),
052:                        new Byte(ManagedObjectState.PARTIAL_MAP_TYPE));
053:                classNameToStateMap.put(gnu.trove.THashMap.class.getName(),
054:                        new Byte(ManagedObjectState.MAP_TYPE));
055:                classNameToStateMap.put(java.util.HashMap.class.getName(),
056:                        new Byte(ManagedObjectState.PARTIAL_MAP_TYPE));
057:                classNameToStateMap.put(java.util.Collections.EMPTY_MAP
058:                        .getClass().getName(), new Byte(
059:                        ManagedObjectState.MAP_TYPE));
060:                classNameToStateMap.put(
061:                        java.util.LinkedHashMap.class.getName(), new Byte(
062:                                ManagedObjectState.LINKED_HASHMAP_TYPE));
063:                classNameToStateMap.put(java.util.TreeMap.class.getName(),
064:                        new Byte(ManagedObjectState.TREE_MAP_TYPE));
065:                classNameToStateMap.put(gnu.trove.THashSet.class.getName(),
066:                        new Byte(ManagedObjectState.SET_TYPE));
067:                classNameToStateMap.put(java.util.HashSet.class.getName(),
068:                        new Byte(ManagedObjectState.SET_TYPE));
069:                classNameToStateMap.put(
070:                        java.util.LinkedHashSet.class.getName(), new Byte(
071:                                ManagedObjectState.SET_TYPE));
072:                classNameToStateMap.put(java.util.Collections.EMPTY_SET
073:                        .getClass().getName(), new Byte(
074:                        ManagedObjectState.SET_TYPE));
075:                classNameToStateMap.put(java.util.TreeSet.class.getName(),
076:                        new Byte(ManagedObjectState.TREE_SET_TYPE));
077:                classNameToStateMap.put(java.util.LinkedList.class.getName(),
078:                        new Byte(ManagedObjectState.LIST_TYPE));
079:                classNameToStateMap.put(java.util.ArrayList.class.getName(),
080:                        new Byte(ManagedObjectState.LIST_TYPE));
081:                classNameToStateMap.put(java.util.Vector.class.getName(),
082:                        new Byte(ManagedObjectState.LIST_TYPE));
083:                classNameToStateMap.put(java.util.Stack.class.getName(),
084:                        new Byte(ManagedObjectState.LIST_TYPE));
085:                classNameToStateMap.put(java.util.Collections.EMPTY_LIST
086:                        .getClass().getName(), new Byte(
087:                        ManagedObjectState.LIST_TYPE));
088:                classNameToStateMap.put(java.util.Date.class.getName(),
089:                        new Byte(ManagedObjectState.DATE_TYPE));
090:                classNameToStateMap.put(java.sql.Date.class.getName(),
091:                        new Byte(ManagedObjectState.DATE_TYPE));
092:                classNameToStateMap.put(java.sql.Time.class.getName(),
093:                        new Byte(ManagedObjectState.DATE_TYPE));
094:                classNameToStateMap.put(java.sql.Timestamp.class.getName(),
095:                        new Byte(ManagedObjectState.DATE_TYPE));
096:                classNameToStateMap.put(java.net.URL.class.getName(), new Byte(
097:                        ManagedObjectState.URL_TYPE));
098:                // These 1.5 classes needs to be compiled in 1.4 !!
099:                classNameToStateMap.put(
100:                        "java.util.concurrent.LinkedBlockingQueue", new Byte(
101:                                ManagedObjectState.QUEUE_TYPE));
102:                classNameToStateMap.put(
103:                        "java.util.concurrent.ConcurrentHashMap", new Byte(
104:                                ManagedObjectState.CONCURRENT_HASHMAP_TYPE));
105:            }
106:
107:            private ManagedObjectStateFactory(
108:                    ManagedObjectChangeListenerProvider listenerProvider,
109:                    StringIndex stringIndex,
110:                    PhysicalManagedObjectStateFactory physicalMOFactory,
111:                    PersistentCollectionFactory factory) {
112:                this .listenerProvider = listenerProvider;
113:                this .stringIndex = stringIndex;
114:                this .physicalMOFactory = physicalMOFactory;
115:                this .persistentCollectionFactory = factory;
116:            }
117:
118:            /*
119:             * @see comments above
120:             */
121:            public static synchronized ManagedObjectStateFactory createInstance(
122:                    ManagedObjectChangeListenerProvider listenerProvider,
123:                    Persistor persistor) {
124:                if (singleton != null && !disableAssertions) {
125:                    // not good !!
126:                    throw new AssertionError(
127:                            "This class is singleton. It is not to be instanciated more than once. "
128:                                    + singleton);
129:                }
130:                singleton = new ManagedObjectStateFactory(listenerProvider,
131:                        persistor.getStringIndex(),
132:                        new PhysicalManagedObjectStateFactory(persistor
133:                                .getClassPersistor()), persistor
134:                                .getPersistentCollectionFactory());
135:                return singleton;
136:            }
137:
138:            // This is provided only for testing
139:            public static synchronized void disableSingleton(boolean b) {
140:                disableAssertions = b;
141:            }
142:
143:            // This is provided only for testing
144:            public static synchronized void setInstance(
145:                    ManagedObjectStateFactory factory) {
146:                Assert.assertNotNull(factory);
147:                singleton = factory;
148:            }
149:
150:            /**
151:             * This method is not synchronized as the creation and access happens sequencially and this is a costly method to
152:             * synchronize and singleton is a volatile variable
153:             */
154:            public static ManagedObjectStateFactory getInstance() {
155:                Assert.assertNotNull(singleton);
156:                return singleton;
157:            }
158:
159:            public StringIndex getStringIndex() {
160:                return stringIndex;
161:            }
162:
163:            public ManagedObjectChangeListener getListener() {
164:                return listenerProvider.getListener();
165:            }
166:
167:            public ManagedObjectState createState(ObjectID oid,
168:                    ObjectID parentID, String className, String loaderDesc,
169:                    DNACursor cursor) {
170:                byte type = getStateObjectTypeFor(className);
171:
172:                if (type == ManagedObjectState.LITERAL_TYPE) {
173:                    return new LiteralTypesManagedObjectState();
174:                }
175:
176:                final long classID = getClassID(className, loaderDesc);
177:
178:                if (type == ManagedObjectState.PHYSICAL_TYPE) {
179:                    return physicalMOFactory.create(classID, parentID,
180:                            className, loaderDesc, cursor);
181:                }
182:                switch (type) {
183:                case ManagedObjectState.ARRAY_TYPE:
184:                    return new ArrayManagedObjectState(classID);
185:                case ManagedObjectState.MAP_TYPE:
186:                    return new MapManagedObjectState(classID,
187:                            persistentCollectionFactory
188:                                    .createPersistentMap(oid));
189:                case ManagedObjectState.PARTIAL_MAP_TYPE:
190:                    return new PartialMapManagedObjectState(classID,
191:                            persistentCollectionFactory
192:                                    .createPersistentMap(oid));
193:                case ManagedObjectState.LINKED_HASHMAP_TYPE:
194:                    return new LinkedHashMapManagedObjectState(classID);
195:                case ManagedObjectState.TREE_MAP_TYPE:
196:                    return new TreeMapManagedObjectState(classID);
197:                case ManagedObjectState.SET_TYPE:
198:                    return new SetManagedObjectState(classID);
199:                case ManagedObjectState.TREE_SET_TYPE:
200:                    return new TreeSetManagedObjectState(classID);
201:                case ManagedObjectState.LIST_TYPE:
202:                    return new ListManagedObjectState(classID);
203:                case ManagedObjectState.QUEUE_TYPE:
204:                    return new QueueManagedObjectState(classID);
205:                case ManagedObjectState.DATE_TYPE:
206:                    return new DateManagedObjectState(classID);
207:                case ManagedObjectState.CONCURRENT_HASHMAP_TYPE:
208:                    return new ConcurrentHashMapManagedObjectState(classID);
209:                case ManagedObjectState.URL_TYPE:
210:                    return new URLManagedObjectState(classID);
211:                }
212:                // Unreachable
213:                throw new AssertionError("Type : " + type + " is unknown !");
214:            }
215:
216:            private long getClassID(String className, String loaderDesc) {
217:                return getStringIndex().getOrCreateIndexFor(
218:                        loaderDesc + Namespace.getClassNameAndLoaderSeparator()
219:                                + className);
220:            }
221:
222:            public String getClassName(long classID) {
223:                String s = null;
224:                try {
225:                    String separator = Namespace
226:                            .getClassNameAndLoaderSeparator();
227:                    s = getStringIndex().getStringFor(classID);
228:                    return s.substring(s.indexOf(separator)
229:                            + separator.length());
230:                } catch (Exception ex) {
231:                    throw new AssertionError(
232:                            "loaderDesc://:ClassName string for classId  "
233:                                    + classID + " not in the right format : "
234:                                    + s);
235:                }
236:            }
237:
238:            public String getLoaderDescription(long classID) {
239:                String s = null;
240:                try {
241:                    String separator = Namespace
242:                            .getClassNameAndLoaderSeparator();
243:                    s = getStringIndex().getStringFor(classID);
244:                    return s.substring(0, s.indexOf(separator));
245:                } catch (Exception ex) {
246:                    throw new AssertionError(
247:                            "loaderDesc://:ClassName string for classId  "
248:                                    + classID + " not in the right format : "
249:                                    + s);
250:                }
251:            }
252:
253:            private byte getStateObjectTypeFor(String className) {
254:                String logicalExtendingClassName = Namespace
255:                        .parseLogicalNameIfNeceesary(className);
256:                if (logicalExtendingClassName != null) {
257:                    Byte t = (Byte) classNameToStateMap
258:                            .get(logicalExtendingClassName);
259:                    if (t != null) {
260:                        return t.byteValue();
261:                    }
262:
263:                    className = Namespace.parseClassNameIfNecessary(className);
264:                }
265:
266:                if (className.startsWith("[")) {
267:                    return ManagedObjectState.ARRAY_TYPE;
268:                }
269:                Byte type = (Byte) classNameToStateMap.get(className);
270:                if (type != null) {
271:                    return type.byteValue();
272:                }
273:                if (literalValues.isLiteral(className)) {
274:                    return ManagedObjectState.LITERAL_TYPE;
275:                }
276:                return ManagedObjectState.PHYSICAL_TYPE;
277:            }
278:
279:            public PhysicalManagedObjectState createPhysicalState(
280:                    ObjectID parentID, int classId)
281:                    throws ClassNotFoundException {
282:                return physicalMOFactory.create(parentID, classId);
283:            }
284:
285:            public ManagedObjectState readManagedObjectStateFrom(
286:                    ObjectInput in, byte type) {
287:                try {
288:                    switch (type) {
289:                    case ManagedObjectState.PHYSICAL_TYPE:
290:                        return PhysicalManagedObjectState.readFrom(in);
291:                    case ManagedObjectState.MAP_TYPE:
292:                        return MapManagedObjectState.readFrom(in);
293:                    case ManagedObjectState.PARTIAL_MAP_TYPE:
294:                        return PartialMapManagedObjectState.readFrom(in);
295:                    case ManagedObjectState.LINKED_HASHMAP_TYPE:
296:                        return LinkedHashMapManagedObjectState.readFrom(in);
297:                    case ManagedObjectState.ARRAY_TYPE:
298:                        return ArrayManagedObjectState.readFrom(in);
299:                    case ManagedObjectState.DATE_TYPE:
300:                        return DateManagedObjectState.readFrom(in);
301:                    case ManagedObjectState.LITERAL_TYPE:
302:                        return LiteralTypesManagedObjectState.readFrom(in);
303:                    case ManagedObjectState.LIST_TYPE:
304:                        return ListManagedObjectState.readFrom(in);
305:                    case ManagedObjectState.SET_TYPE:
306:                        return SetManagedObjectState.readFrom(in);
307:                    case ManagedObjectState.TREE_SET_TYPE:
308:                        return TreeSetManagedObjectState.readFrom(in);
309:                    case ManagedObjectState.TREE_MAP_TYPE:
310:                        return TreeMapManagedObjectState.readFrom(in);
311:                    case ManagedObjectState.CONCURRENT_HASHMAP_TYPE:
312:                        return ConcurrentHashMapManagedObjectState.readFrom(in);
313:                    case ManagedObjectState.QUEUE_TYPE:
314:                        return QueueManagedObjectState.readFrom(in);
315:                    case ManagedObjectState.URL_TYPE:
316:                        return URLManagedObjectState.readFrom(in);
317:                    default:
318:                        throw new AssertionError("Unknown type : " + type
319:                                + " : Dont know how to deserialize this type !");
320:                    }
321:                } catch (IOException e) {
322:                    throw new TCRuntimeException(e);
323:                } catch (ClassNotFoundException e) {
324:                    throw new TCRuntimeException(e);
325:                }
326:            }
327:
328:            public ManagedObjectState recreateState(ObjectID id, ObjectID pid,
329:                    String className, String loaderDesc, DNACursor cursor,
330:                    ManagedObjectState oldState) {
331:                Assert.assertEquals(ManagedObjectState.PHYSICAL_TYPE, oldState
332:                        .getType());
333:                final long classID = getClassID(className, loaderDesc);
334:                return physicalMOFactory.recreate(classID, pid, className,
335:                        loaderDesc, cursor,
336:                        (PhysicalManagedObjectState) oldState);
337:            }
338:        }
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