Examples of OWALRecord

com.orientechnologies.orient.core.storage.impl.local.paginated.wal.OWALRecord
@author Andrey Lomakin @since 25.04.13

Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.wal.OWALRecord

    }
  }


  protected void undoOperation(List<OLogSequenceNumber> operationUnit) throws IOException {
    for (int i = operationUnit.size() - 1; i >= 0; i--) {
      OWALRecord record = writeAheadLog.read(operationUnit.get(i));
      if (checkFirstAtomicUnitRecord(i, record)) {
        assert ((OAtomicUnitStartRecord) record).isRollbackSupported();
        continue;
      }


      if (checkLastAtomicUnitRecord(i, record, operationUnit.size())) {
        assert ((OAtomicUnitEndRecord) record).isRollback();
        continue;
      }


      if (record instanceof OUpdatePageRecord) {
        OUpdatePageRecord updatePageRecord = (OUpdatePageRecord) record;
        final long fileId = updatePageRecord.getFileId();
        final long pageIndex = updatePageRecord.getPageIndex();


        if (!diskCache.isOpen(fileId))
          diskCache.openFile(fileId);


        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) {
        final OFileCreatedCreatedWALRecord fileCreatedCreatedRecord = (OFileCreatedCreatedWALRecord) record;


        diskCache.openFile(fileCreatedCreatedRecord.getFileName(), fileCreatedCreatedRecord.getFileId());
        diskCache.deleteFile(fileCreatedCreatedRecord.getFileId());
      } else {
        OLogManager.instance().error(this, "Invalid WAL record type was passed %s. Given record will be skipped.",
            record.getClass());
        assert false : "Invalid WAL record type was passed " + record.getClass().getName();
      }
    }
  }

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.wal.OWALRecord


    List<OLogSequenceNumber> operationUnit = new ArrayList<OLogSequenceNumber>();


    OLogSequenceNumber lsn = startLSN;
    while (lsn != null) {
      OWALRecord record = writeAheadLog.read(lsn);
      if (!(record instanceof OOperationUnitRecord)) {
        lsn = writeAheadLog.next(lsn);
        continue;
      }

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.wal.OWALRecord

      OLogManager.instance().info(this, "Checkpoints are absent, the restore will start from the beginning.");
      restoreFromBegging();
      return;
    }


    OWALRecord checkPointRecord;
    try {
      checkPointRecord = writeAheadLog.read(lastCheckPoint);
    } catch (OWALPageBrokenException e) {
      checkPointRecord = null;
    }


    if (checkPointRecord == null) {
      OLogManager.instance().info(this, "Checkpoints are absent, the restore will start from the beginning.");
      restoreFromBegging();
      return;
    }


    if (checkPointRecord instanceof OFuzzyCheckpointStartRecord) {
      OLogManager.instance().info(this, "Found FUZZY checkpoint.");


      boolean fuzzyCheckPointIsComplete = checkFuzzyCheckPointIsComplete(lastCheckPoint);
      if (!fuzzyCheckPointIsComplete) {
        OLogManager.instance().warn(this, "FUZZY checkpoint is not complete.");


        OLogSequenceNumber previousCheckpoint = ((OFuzzyCheckpointStartRecord) checkPointRecord).getPreviousCheckpoint();
        checkPointRecord = null;


        if (previousCheckpoint != null)
          checkPointRecord = writeAheadLog.read(previousCheckpoint);


        if (checkPointRecord != null) {
          OLogManager.instance().warn(this, "Restore will start from the previous checkpoint.");
          restoreFromCheckPoint((OAbstractCheckPointStartRecord) checkPointRecord);
        } else {
          OLogManager.instance().warn(this, "Restore will start from the beginning.");
          restoreFromBegging();
        }
      } else
        restoreFromCheckPoint((OAbstractCheckPointStartRecord) checkPointRecord);


      return;
    }


    if (checkPointRecord instanceof OFullCheckpointStartRecord) {
      OLogManager.instance().info(this, "FULL checkpoint found.");
      boolean fullCheckPointIsComplete = checkFullCheckPointIsComplete(lastCheckPoint);
      if (!fullCheckPointIsComplete) {
        OLogManager.instance().warn(this, "FULL checkpoint has not completed.");


        OLogSequenceNumber previousCheckpoint = ((OFullCheckpointStartRecord) checkPointRecord).getPreviousCheckpoint();
        checkPointRecord = null;
        if (previousCheckpoint != null)
          checkPointRecord = writeAheadLog.read(previousCheckpoint);


        if (checkPointRecord != null) {
          OLogManager.instance().warn(this, "Restore will start from the previous checkpoint.");


        } else {
          OLogManager.instance().warn(this, "Restore will start from the beginning.");
          restoreFromBegging();
        }
      } else
        restoreFromCheckPoint((OAbstractCheckPointStartRecord) checkPointRecord);


      return;
    }


    throw new OStorageException("Unknown checkpoint record type " + checkPointRecord.getClass().getName());


  }

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.wal.OWALRecord

  private boolean checkFullCheckPointIsComplete(OLogSequenceNumber lastCheckPoint) throws IOException {
    try {
      OLogSequenceNumber lsn = writeAheadLog.next(lastCheckPoint);


      while (lsn != null) {
        OWALRecord walRecord = writeAheadLog.read(lsn);
        if (walRecord instanceof OCheckpointEndRecord)
          return true;


        lsn = writeAheadLog.next(lsn);
      }

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.wal.OWALRecord

  private boolean checkFuzzyCheckPointIsComplete(OLogSequenceNumber lastCheckPoint) throws IOException {
    try {
      OLogSequenceNumber lsn = writeAheadLog.next(lastCheckPoint);


      while (lsn != null) {
        OWALRecord walRecord = writeAheadLog.read(lsn);
        if (walRecord instanceof OFuzzyCheckpointEndRecord)
          return true;


        lsn = writeAheadLog.next(lsn);
      }

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Examples of com.orientechnologies.orient.core.storage.impl.local.paginated.wal.OWALRecord

    Map<OOperationUnitId, List<OLogSequenceNumber>> operationUnits = new HashMap<OOperationUnitId, List<OLogSequenceNumber>>();
    List<OWALRecord> batch = new ArrayList<OWALRecord>();


    try {
      while (lsn != null) {
        OWALRecord walRecord = writeAheadLog.read(lsn);
        batch.add(walRecord);


        if (batch.size() >= batchSize) {
          OLogManager.instance().info(this, "Heap memory is low apply batch of operations are read from WAL.");
          recordsProcessed = restoreWALBatch(batch, operationUnits, recordsProcessed, reportInterval);

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