Source Code Cross Referenced for GenericConglomerateController.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » store » access » conglomerate » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.store.access.conglomerate 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:
003:           Derby - Class org.apache.derby.impl.store.access.conglomerate.GenericConglomerateController
004:
005:           Licensed to the Apache Software Foundation (ASF) under one or more
006:           contributor license agreements.  See the NOTICE file distributed with
007:           this work for additional information regarding copyright ownership.
008:           The ASF licenses this file to you under the Apache License, Version 2.0
009:           (the "License"); you may not use this file except in compliance with
010:           the License.  You may obtain a copy of the License at
011:
012:              http://www.apache.org/licenses/LICENSE-2.0
013:
014:           Unless required by applicable law or agreed to in writing, software
015:           distributed under the License is distributed on an "AS IS" BASIS,
016:           WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017:           See the License for the specific language governing permissions and
018:           limitations under the License.
019:
020:         */
021:
022:        package org.apache.derby.impl.store.access.conglomerate;
023:
024:        import org.apache.derby.iapi.reference.SQLState;
025:
026:        import org.apache.derby.iapi.services.sanity.SanityManager;
027:
028:        import org.apache.derby.iapi.error.StandardException;
029:
030:        import org.apache.derby.iapi.store.access.conglomerate.Conglomerate;
031:        import org.apache.derby.iapi.store.access.conglomerate.LogicalUndo;
032:        import org.apache.derby.iapi.store.access.conglomerate.TransactionManager;
033:
034:        import org.apache.derby.iapi.store.access.ConglomerateController;
035:        import org.apache.derby.iapi.store.access.DynamicCompiledOpenConglomInfo;
036:        import org.apache.derby.iapi.store.access.Qualifier;
037:        import org.apache.derby.iapi.store.access.RowUtil;
038:        import org.apache.derby.iapi.store.access.SpaceInfo;
039:
040:        import org.apache.derby.iapi.store.raw.ContainerHandle;
041:        import org.apache.derby.iapi.store.raw.FetchDescriptor;
042:        import org.apache.derby.iapi.store.raw.Page;
043:        import org.apache.derby.iapi.store.raw.RecordHandle;
044:        import org.apache.derby.iapi.store.raw.Transaction;
045:
046:        import org.apache.derby.iapi.types.DataValueDescriptor;
047:
048:        import org.apache.derby.iapi.types.RowLocation;
049:
050:        import org.apache.derby.iapi.services.io.FormatableBitSet;
051:
052:        import java.util.Properties;
053:
054:        /**
055:         **/
056:
057:        public abstract class GenericConglomerateController extends
058:                GenericController implements  ConglomerateController {
059:
060:            /**************************************************************************
061:             * Fields of the class
062:             **************************************************************************
063:             */
064:
065:            /**************************************************************************
066:             * Constructors for This class:
067:             **************************************************************************
068:             */
069:
070:            /**************************************************************************
071:             * Private/Protected methods of This class:
072:             **************************************************************************
073:             */
074:
075:            /**************************************************************************
076:             * Public Methods of This class:
077:             **************************************************************************
078:             */
079:
080:            /**************************************************************************
081:             * Public Methods implementing ConglomerateController which just 
082:             *     delegate to OpenConglomerate:
083:             **************************************************************************
084:             */
085:
086:            /**************************************************************************
087:             * Public Methods implementing ConglomerateController:
088:             **************************************************************************
089:             */
090:
091:            /**
092:             * @see ConglomerateController#close
093:             **/
094:            public void close() throws StandardException {
095:                super .close();
096:
097:                // If we are closed due to catching an error in the middle of init,
098:                // xact_manager may not be set yet. 
099:                if ((open_conglom != null)
100:                        && (open_conglom.getXactMgr() != null))
101:                    open_conglom.getXactMgr().closeMe(this );
102:            }
103:
104:            /**
105:             * Close conglomerate controller as part of terminating a transaction.
106:             * <p>
107:             * Use this call to close the conglomerate controller resources as part of
108:             * committing or aborting a transaction.  The normal close() routine may 
109:             * do some cleanup that is either unnecessary, or not correct due to the 
110:             * unknown condition of the controller following a transaction ending error.
111:             * Use this call when closing all controllers as part of an abort of a 
112:             * transaction.
113:             * <p)
114:             * This call is meant to only be used internally by the Storage system,
115:             * clients of the storage system should use the simple close() interface.
116:             * <p>
117:             * RESOLVE (mikem) - move this call to ConglomerateManager so it is
118:             * obvious that non-access clients should not call this.
119:             *
120:             * @param closeHeldScan           If true, means to close controller even if
121:             *                                it has been opened to be kept opened 
122:             *                                across commit.  This is
123:             *                                used to close these controllers on abort.
124:             *
125:             * @return boolean indicating that the close has resulted in a real close
126:             *                 of the controller.  A held scan will return false if 
127:             *                 called by closeForEndTransaction(false), otherwise it 
128:             *                 will return true.  A non-held scan will always return 
129:             *                 true.
130:             *
131:             * @exception  StandardException  Standard exception policy.
132:             **/
133:            public boolean closeForEndTransaction(boolean closeHeldScan)
134:                    throws StandardException {
135:                super .close();
136:
137:                if ((!open_conglom.getHold()) || closeHeldScan) {
138:                    // If we are closed due to catching an error in the middle of init,
139:                    // xact_manager may not be set yet. 
140:                    if ((open_conglom != null)
141:                            && (open_conglom.getXactMgr() != null))
142:                        open_conglom.getXactMgr().closeMe(this );
143:
144:                    return (true);
145:
146:                } else {
147:                    return (false);
148:                }
149:            }
150:
151:            /**
152:             * @see ConglomerateController#delete
153:             **/
154:            public boolean delete(RowLocation loc) throws StandardException {
155:                if (open_conglom.isClosed()) {
156:                    if (open_conglom.getHold()) {
157:                        if (open_conglom.isClosed())
158:                            open_conglom.reopen();
159:                    } else {
160:                        throw (StandardException.newException(
161:                                SQLState.HEAP_IS_CLOSED, open_conglom
162:                                        .getConglomerate().getId()));
163:                    }
164:                }
165:
166:                RowPosition pos = new RowPosition();
167:
168:                getRowPositionFromRowLocation(loc, pos);
169:
170:                if (!open_conglom.latchPage(pos)) {
171:                    return false;
172:                }
173:
174:                open_conglom.lockPositionForWrite(pos,
175:                        false /* not an insert */, true);
176:
177:                boolean ret_val = true;
178:
179:                // RESOLVE (mikem) - RECID - performance could be better if we did not
180:                // have to call isDeletedAtSlot().
181:
182:                if (pos.current_page.isDeletedAtSlot(pos.current_slot)) {
183:                    ret_val = false;
184:                } else {
185:                    // Delete the row 
186:                    pos.current_page.deleteAtSlot(pos.current_slot, true,
187:                            (LogicalUndo) null);
188:
189:                    // try to reclaim rows when the page is only full of deleted rows,
190:                    // or in the special case of the first page when all rows except the
191:                    // "control row" are deleted.  Or if the row we just deleted is
192:                    // a long row or has a long column.
193:                    if (pos.current_page.shouldReclaimSpace(pos.current_page
194:                            .getPageNumber() == 1 ? 1 : 0, pos.current_slot)) {
195:                        queueDeletePostCommitWork(pos);
196:                    }
197:                }
198:
199:                pos.current_page.unlatch();
200:
201:                return (ret_val);
202:            }
203:
204:            /**
205:             * @see ConglomerateController#fetch
206:             **/
207:            public boolean fetch(RowLocation loc, DataValueDescriptor[] row,
208:                    FormatableBitSet validColumns) throws StandardException {
209:                if (open_conglom.isClosed()) {
210:                    if (open_conglom.getHold()) {
211:                        if (open_conglom.isClosed())
212:                            open_conglom.reopen();
213:                    } else {
214:                        throw (StandardException.newException(
215:                                SQLState.HEAP_IS_CLOSED, open_conglom
216:                                        .getConglomerate().getId()));
217:                    }
218:                }
219:
220:                if (SanityManager.DEBUG) {
221:                    // Make sure valid columns are in the list.  The RowUtil
222:                    // call is too expensive to make in a released system for
223:                    // every fetch.
224:                    int invalidColumn = RowUtil.columnOutOfRange(row,
225:                            validColumns, open_conglom.getFormatIds().length);
226:
227:                    if (invalidColumn >= 0) {
228:                        throw (StandardException.newException(
229:                                SQLState.HEAP_TEMPLATE_MISMATCH, new Long(
230:                                        invalidColumn), new Long(open_conglom
231:                                        .getFormatIds().length)));
232:                    }
233:                }
234:
235:                // Get the record handle out of its wrapper.
236:
237:                RowPosition pos = new RowPosition();
238:
239:                getRowPositionFromRowLocation(loc, pos);
240:
241:                if (!open_conglom.latchPage(pos)) {
242:                    return (false);
243:                }
244:
245:                // Do not get U row lock - only get X or S.  There is no good point
246:                // currently to convert the U lock to an S lock, we don't know when
247:                // the calling code is through with the lock.
248:                // RESOLVE (mikem) - talk to language and see if it is worth it to
249:                //     get U lock and have language call back when we should take
250:                //     appropriate action on the U lock.
251:
252:                if (open_conglom.isForUpdate()) {
253:                    open_conglom.lockPositionForWrite(pos,
254:                            false /* not an insert */, true);
255:                } else {
256:                    open_conglom.lockPositionForRead(pos, (RowPosition) null,
257:                            false, true);
258:                }
259:
260:                // Fetch the row.
261:                // RESOLVE (STO061) - don't know whether the fetch is for update or not.
262:                //
263:                // RESOLVE (mikem) - get rid of new here.
264:                boolean ret_val = (pos.current_page.fetchFromSlot(
265:                        pos.current_rh, pos.current_slot, row,
266:                        new FetchDescriptor(row.length, validColumns,
267:                                (Qualifier[][]) null), false) != null);
268:
269:                // RESOLVE (mikem) - should be some way to hide this in the unlock call,
270:                // and just always make the unlock call.
271:
272:                if (!open_conglom.isForUpdate())
273:                    open_conglom.unlockPositionAfterRead(pos);
274:
275:                pos.current_page.unlatch();
276:
277:                return (ret_val);
278:            }
279:
280:            /**
281:             * @see ConglomerateController#fetch
282:             **/
283:            public boolean fetch(RowLocation loc, DataValueDescriptor[] row,
284:                    FormatableBitSet validColumns, boolean waitForLock)
285:                    throws StandardException {
286:                if (open_conglom.isClosed()) {
287:                    if (open_conglom.getHold()) {
288:                        if (open_conglom.isClosed())
289:                            open_conglom.reopen();
290:                    } else {
291:                        throw (StandardException.newException(
292:                                SQLState.HEAP_IS_CLOSED, open_conglom
293:                                        .getConglomerate().getId()));
294:                    }
295:                }
296:
297:                if (SanityManager.DEBUG) {
298:                    // Make sure valid columns are in the list.  The RowUtil
299:                    // call is too expensive to make in a released system for
300:                    // every fetch.
301:                    int invalidColumn = RowUtil.columnOutOfRange(row,
302:                            validColumns, open_conglom.getFormatIds().length);
303:
304:                    if (invalidColumn >= 0) {
305:                        throw (StandardException.newException(
306:                                SQLState.HEAP_TEMPLATE_MISMATCH, new Long(
307:                                        invalidColumn), new Long(open_conglom
308:                                        .getFormatIds().length)));
309:                    }
310:                }
311:
312:                // Get the record handle out of its wrapper.
313:
314:                RowPosition pos = new RowPosition();
315:
316:                getRowPositionFromRowLocation(loc, pos);
317:
318:                if (!open_conglom.latchPage(pos)) {
319:                    return false;
320:                }
321:
322:                // Do not get U row lock - only get X or S.  There is not good point
323:                // currently to convert the U lock to an S lock, we don't know when
324:                // the calling code is through with the lock.
325:                // RESOLVE (mikem) - talk to language and see if it is worth it to
326:                //     get U lock and have language call back when we should take
327:                //     appropriate action on the U lock.
328:
329:                if (open_conglom.isForUpdate()) {
330:                    open_conglom.lockPositionForWrite(pos,
331:                            false /* not an insert */, waitForLock);
332:                } else {
333:                    open_conglom.lockPositionForRead(pos, (RowPosition) null,
334:                            false, waitForLock);
335:                }
336:
337:                // Fetch the row.
338:                // RESOLVE (STO061) - don't know whether the fetch is for update or not.
339:                //
340:                //
341:                // RESOLVE (mikem) - get rid of new here.
342:                boolean ret_val = (pos.current_page.fetchFromSlot(
343:                        pos.current_rh, pos.current_slot, row,
344:                        new FetchDescriptor(row.length, validColumns,
345:                                (Qualifier[][]) null), false) != null);
346:
347:                // RESOLVE (mikem) - should be some way to hide this in the unlock call,
348:                // and just always make the unlock call.
349:                if (!open_conglom.isForUpdate())
350:                    open_conglom.unlockPositionAfterRead(pos);
351:
352:                pos.current_page.unlatch();
353:
354:                return (ret_val);
355:            }
356:
357:            /**
358:             * @see ConglomerateController#replace
359:             **/
360:            public boolean replace(RowLocation loc, DataValueDescriptor[] row,
361:                    FormatableBitSet validColumns) throws StandardException {
362:                if (open_conglom.isClosed()) {
363:                    if (open_conglom.getHold()) {
364:                        if (open_conglom.isClosed())
365:                            open_conglom.reopen();
366:                    } else {
367:                        throw (StandardException.newException(
368:                                SQLState.HEAP_IS_CLOSED, open_conglom
369:                                        .getConglomerate().getId()));
370:                    }
371:                }
372:
373:                if (SanityManager.DEBUG) {
374:                    // Make sure valid columns are in the list.  The RowUtil
375:                    // call is too expensive to make in a released system for
376:                    // every fetch.
377:                    int invalidColumn = RowUtil.columnOutOfRange(row,
378:                            validColumns, open_conglom.getFormatIds().length);
379:
380:                    if (invalidColumn >= 0) {
381:                        throw (StandardException.newException(
382:                                SQLState.HEAP_TEMPLATE_MISMATCH, new Long(
383:                                        invalidColumn), new Long(open_conglom
384:                                        .getFormatIds().length)));
385:                    }
386:                }
387:
388:                RowPosition pos = new RowPosition();
389:
390:                getRowPositionFromRowLocation(loc, pos);
391:
392:                if (!open_conglom.latchPage(pos)) {
393:                    return false;
394:                }
395:
396:                open_conglom.lockPositionForWrite(pos, false, true);
397:
398:                boolean ret_val = true;
399:
400:                if (pos.current_page.isDeletedAtSlot(pos.current_slot)) {
401:                    ret_val = false;
402:                } else {
403:                    // Update the record.  
404:                    pos.current_page.updateAtSlot(pos.current_slot, row,
405:                            validColumns);
406:                }
407:
408:                pos.current_page.unlatch();
409:
410:                return (ret_val);
411:            }
412:        }
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