Package org.hornetq.core.paging.cursor

Examples of org.hornetq.core.paging.cursor.PageCache

112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
      return activeCursors.get(cursorID);
   }

   public PagedMessage getMessage(final PagePosition pos)
   {
      PageCache cache = getPageCache(pos.getPageNr());

      if (cache == null || pos.getMessageNr() >= cache.getNumberOfMessages())
      {
         // sanity check, this should never happen unless there's a bug
         throw new IllegalStateException("Invalid messageNumber passed = " + pos + " on " + cache);
      }

      return cache.getMessage(pos.getMessageNr());
   }
View Full Code Here
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
   public PageCache getPageCache(final long pageId)
   {
      try
      {
         boolean needToRead = false;
         PageCache cache = null;
         synchronized (softCache)
         {
            if (pageId > pagingStore.getCurrentWritingPage())
            {
               return null;
            }

            cache = softCache.get(pageId);
            if (cache == null)
            {
               if (!pagingStore.checkPageFileExists((int)pageId))
               {
                  return null;
               }

               cache = createPageCache(pageId);
               needToRead = true;
               // anyone reading from this cache will have to wait reading to finish first
               // we also want only one thread reading this cache
               cache.lock();
               if (isTrace)
               {
                  HornetQServerLogger.LOGGER.trace("adding " + pageId +  " into cursor = " + this.pagingStore.getAddress());
               }
               softCache.put(pageId, cache);
            }
         }

         // Reading is done outside of the synchronized block, however
         // the page stays locked until the entire reading is finished
         if (needToRead)
         {
            Page page = null;
            try
            {
               page = pagingStore.createPage((int)pageId);

               storageManager.beforePageRead();
               page.open();

               List<PagedMessage> pgdMessages = page.read(storageManager);
               cache.setMessages(pgdMessages.toArray(new PagedMessage[pgdMessages.size()]));
            }
            finally
            {
               try
               {
                  if (page != null)
                  {
                     page.close();
                  }
               }
               catch (Throwable ignored)
               {
               }
               storageManager.afterPageRead();
               cache.unlock();
            }
         }

         return cache;
      }
View Full Code Here
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
      try
      {
         for (Page depagedPage : depagedPages)
         {
            PageCache cache;
            PagedMessage[] pgdMessages;
            synchronized (softCache)
            {
               cache = softCache.get((long)depagedPage.getPageId());
            }

            if (isTrace)
            {
               HornetQServerLogger.LOGGER.trace("Removing page " + depagedPage.getPageId() + " from page-cache");
            }

            if (cache == null)
            {
               // The page is not on cache any more
               // We need to read the page-file before deleting it
               // to make sure we remove any large-messages pending
               storageManager.beforePageRead();

               List<PagedMessage> pgdMessagesList = null;
               try
               {
                  depagedPage.open();
                  pgdMessagesList = depagedPage.read(storageManager);
               }
               finally
               {
                  try
                  {
                     depagedPage.close();
                  }
                  catch (Exception e)
                  {
                  }

                  storageManager.afterPageRead();
               }
               depagedPage.close();
               pgdMessages = pgdMessagesList.toArray(new PagedMessage[pgdMessagesList.size()]);
            }
            else
            {
               pgdMessages = cache.getMessages();
            }

            depagedPage.delete(pgdMessages);
            onDeletePage(depagedPage);
View Full Code Here
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
      return activeCursors.get(cursorID);
   }

   public PagedMessage getMessage(final PagePosition pos) throws Exception
   {
      PageCache cache = getPageCache(pos);

      if (pos.getMessageNr() >= cache.getNumberOfMessages())
      {
         // sanity check, this should never happen unless there's a bug
         throw new IllegalStateException("Invalid messageNumber passed = " + pos + " on " + cache);
      }

      return cache.getMessage(pos.getMessageNr());
   }
View Full Code Here
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
   public PageCache getPageCache(final long pageId)
   {
      try
      {
         boolean needToRead = false;
         PageCache cache = null;
         synchronized (softCache)
         {
            if (pageId > pagingStore.getCurrentWritingPage())
            {
               return null;
            }

            cache = softCache.get(pageId);
            if (cache == null)
            {
               if (!pagingStore.checkPage((int)pageId))
               {
                  return null;
               }

               cache = createPageCache(pageId);
               needToRead = true;
               // anyone reading from this cache will have to wait reading to finish first
               // we also want only one thread reading this cache
               cache.lock();
               if (isTrace)
               {
                  log.trace("adding " + pageId +  " into cursor = " + this.pagingStore.getAddress());
               }
               softCache.put(pageId, cache);
            }
         }

         // Reading is done outside of the synchronized block, however
         // the page stays locked until the entire reading is finished
         if (needToRead)
         {
            Page page = null;
            try
            {
               page = pagingStore.createPage((int)pageId);

               page.open();

               List<PagedMessage> pgdMessages = page.read(storageManager);
               cache.setMessages(pgdMessages.toArray(new PagedMessage[pgdMessages.size()]));
            }
            finally
            {
               try
               {
                  if (page != null)
                  {
                     page.close();
                  }
               }
               catch (Throwable ignored)
               {
               }
               cache.unlock();
            }
         }

         return cache;
      }
View Full Code Here
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
      try
      {
         for (Page depagedPage : depagedPages)
         {
            PageCache cache;
            PagedMessage[] pgdMessages;
            synchronized (softCache)
            {
               cache = softCache.get((long)depagedPage.getPageId());
            }
           
            if (isTrace)
            {
               log.trace("Removing page " + depagedPage.getPageId() + " from page-cache");
            }

            if (cache == null)
            {
               // The page is not on cache any more
               // We need to read the page-file before deleting it
               // to make sure we remove any large-messages pending
               depagedPage.open();
               List<PagedMessage> pgdMessagesList = depagedPage.read(storageManager);
               depagedPage.close();
               pgdMessages = pgdMessagesList.toArray(new PagedMessage[pgdMessagesList.size()]);
            }
            else
            {
               pgdMessages = cache.getMessages();
            }

            depagedPage.delete(pgdMessages);
           
            synchronized (softCache)
View Full Code Here
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
   private PagedReference internalGetNext(final PagePosition pos)
   {
      PagePosition retPos = pos.nextMessage();

      PageCache cache = cursorProvider.getPageCache(pos.getPageNr());

      if (cache != null && !cache.isLive() && retPos.getMessageNr() >= cache.getNumberOfMessages())
      {
         // The next message is beyond what's available at the current page, so we need to move to the next page
         cache = null;
      }

      // it will scan for the next available page
      while (cache == null && retPos.getPageNr() <= pageStore.getCurrentWritingPage())
      {
         retPos = moveNextPage(retPos);

         cache = cursorProvider.getPageCache(retPos.getPageNr());
      }

      if (cache == null)
      {
         return null;
      }
      else
      {
         PagedMessage serverMessage = cache.getMessage(retPos.getMessageNr());

         if (serverMessage != null)
         {
            return cursorProvider.newReference(retPos, serverMessage, this);
         }
View Full Code Here
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
      {
         PageCursorInfo pageInfo = consumedPages.get(pageNr);

         if (create && pageInfo == null)
         {
            PageCache cache = cursorProvider.getPageCache(pageNr);
            if (cache == null)
            {
               return null;
            }
            pageInfo = new PageCursorInfo(pageNr, cache.getNumberOfMessages(), cache);
            consumedPages.put(pageNr, pageInfo);
         }
         return pageInfo;
      }
View Full Code Here
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
      {
         if (wasLive)
         {
            // if the page was live at any point, we need to
            // get the number of messages from the page-cache
            PageCache localcache = this.cache.get();
            if (localcache == null)
            {
               localcache = cursorProvider.getPageCache(pageId);
               this.cache = new WeakReference<PageCache>(localcache);
            }

            return localcache.getNumberOfMessages();
         }
         else
         {
            return numberOfMessages;
         }
View Full Code Here
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
      return activeCursors.get(cursorID);
   }

   public PagedMessage getMessage(final PagePosition pos)
   {
      PageCache cache = getPageCache(pos.getPageNr());

      if (cache == null || pos.getMessageNr() >= cache.getNumberOfMessages())
      {
         // sanity check, this should never happen unless there's a bug
         throw new IllegalStateException("Invalid messageNumber passed = " + pos + " on " + cache);
      }

      return cache.getMessage(pos.getMessageNr());
   }
View Full Code Here
TOP

Related Classes of org.hornetq.core.paging.cursor.PageCache

  • org.hornetq.core.paging.cursor.impl.PageCursorProviderImpl
  • org.hornetq.core.paging.cursor.impl.PageSubscriptionImpl
  • org.hornetq.core.paging.cursor.impl.PageSubscriptionImpl$PageCursorInfo
  • org.hornetq.tests.stress.paging.PageCursorStressTest
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.