Examples of PageCache

com.hlcl.rql.util.as.PageCache
@author lejafrThis class is a memory optimized cache for pages.
org.hornetq.core.paging.cursor.PageCache
A PageCache @author Clebert Suconic

Examples of com.hlcl.rql.util.as.PageCache

    super();
    
    this.project = project;
    
    // initialize
    letterPagesCache = new PageCache(project);
    termPagesCache = new PageCache(project);
  }

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

      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());
   }

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

   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;
      }

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


      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);

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

      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());
   }

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

   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;
      }

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


      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)

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


   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);
         }

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

      {
         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;
      }

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

      {
         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;
         }

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