Examples of ODurablePage

com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage
Base page class for all durable data structures, that is data structures state of which can be consistently restored after system crash but results of last operations in small interval before crash may be lost. This page has several booked memory areas with following offsets at the beginning:
1. from 0 to 7 - Magic number
2. from 8 to 11 - crc32 of all page content, which is calculated by cache system just before save
3. from 12 to 23 - LSN of last operation which was stored for given page
Developer which will extend this class should use all page memory starting from {@link #NEXT_FREE_POSITION} offset.To make page changes durable method {@link ODurableComponent#logPageChanges(ODurablePage,long,long,boolean)} should be calledjust before release of page {@link com.orientechnologies.orient.core.index.hashindex.local.cache.ODiskCache#release(com.orientechnologies.orient.core.index.hashindex.local.cache.OCacheEntry)}back to the cache. All data structures which use this kind of pages should be derived from {@link com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurableComponent} class. @author Andrey Lomakin @since 16.08.13

Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage

              expectedDiskCache.openFile(fileId);


            final OCacheEntry cacheEntry = expectedDiskCache.load(fileId, pageIndex, true);
            cacheEntry.acquireExclusiveLock();
            try {
              ODurablePage durablePage = new ODurablePage(cacheEntry, ODurablePage.TrackMode.NONE);
              durablePage.restoreChanges(updatePageRecord.getChanges());
              durablePage.setLsn(updatePageRecord.getLsn());


              cacheEntry.markDirty();
            } finally {
              cacheEntry.releaseExclusiveLock();
              expectedDiskCache.release(cacheEntry);

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage

            expectedDiskCache.openFile(fileId);


          final OCacheEntry cacheEntry = expectedDiskCache.load(fileId, pageIndex, true);
          cacheEntry.acquireExclusiveLock();
          try {
            ODurablePage durablePage = new ODurablePage(cacheEntry, ODurablePage.TrackMode.NONE);
            durablePage.restoreChanges(updatePageRecord.getChanges());
            durablePage.setLsn(updatePageRecord.getLsn());


            cacheEntry.markDirty();
          } finally {
            cacheEntry.releaseExclusiveLock();
            expectedDiskCache.release(cacheEntry);

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage

            expectedDiskCache.openFile(fileId);


          final OCacheEntry cacheEntry = expectedDiskCache.load(fileId, pageIndex, true);
          cacheEntry.acquireExclusiveLock();
          try {
            ODurablePage durablePage = new ODurablePage(cacheEntry, ODurablePage.TrackMode.NONE);
            durablePage.restoreChanges(updatePageRecord.getChanges());
            durablePage.setLsn(updatePageRecord.getLsn());


            cacheEntry.markDirty();
          } finally {
            cacheEntry.releaseExclusiveLock();
            expectedDiskCache.release(cacheEntry);

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage


        OCacheEntry cacheEntry = diskCache.load(fileId, pageIndex, true);
        OCachePointer cachePointer = cacheEntry.getCachePointer();
        cachePointer.acquireExclusiveLock();
        try {
          ODurablePage durablePage = new ODurablePage(cacheEntry, ODurablePage.TrackMode.NONE);


          OPageChanges pageChanges = updatePageRecord.getChanges();
          durablePage.revertChanges(pageChanges);


          durablePage.setLsn(updatePageRecord.getLsn());
        } finally {
          cachePointer.releaseExclusiveLock();
          diskCache.release(cacheEntry);
        }
      } else if (record instanceof OFileCreatedCreatedWALRecord) {

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage


          final OCacheEntry cacheEntry = diskCache.load(fileId, pageIndex, true);
          final OCachePointer cachePointer = cacheEntry.getCachePointer();
          cachePointer.acquireExclusiveLock();
          try {
            ODurablePage durablePage = new ODurablePage(cacheEntry, ODurablePage.TrackMode.NONE);
            durablePage.restoreChanges(updatePageRecord.getChanges());
            durablePage.setLsn(lsn);


            cacheEntry.markDirty();
          } finally {
            cachePointer.releaseExclusiveLock();
            diskCache.release(cacheEntry);

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage

            expectedDiskCache.openFile(fileId);


          final OCacheEntry cacheEntry = expectedDiskCache.load(fileId, pageIndex, true);
          cacheEntry.acquireExclusiveLock();
          try {
            ODurablePage durablePage = new ODurablePage(cacheEntry, ODurablePage.TrackMode.NONE);
            durablePage.restoreChanges(updatePageRecord.getChanges());
            durablePage.setLsn(updatePageRecord.getLsn());


            cacheEntry.markDirty();
          } finally {
            cacheEntry.releaseExclusiveLock();
            expectedDiskCache.release(cacheEntry);

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage

            testDiskCache.openFile(fileId);


          final OCacheEntry cacheEntry = testDiskCache.load(fileId, pageIndex, true);
          cacheEntry.acquireExclusiveLock();
          try {
            ODurablePage durablePage = new ODurablePage(cacheEntry, ODurablePage.TrackMode.NONE);
            durablePage.restoreChanges(updatePageRecord.getChanges());
            durablePage.setLsn(updatePageRecord.getLsn());


            cacheEntry.markDirty();
          } finally {
            cacheEntry.releaseExclusiveLock();
            testDiskCache.release(cacheEntry);

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