org.apache.cassandra.utils.ByteBufferUtil.readWithLength java code examples

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}

Cell deserializeColumnBody(DataInput in, CellName name, int mask, ColumnSerializer.Flag flag, int expireBefore) throws IOException
{
  if ((mask & COUNTER_MASK) != 0)
  {
    long timestampOfLastDelete = in.readLong();
    long ts = in.readLong();
    ByteBuffer value = ByteBufferUtil.readWithLength(in);
    return BufferCounterCell.create(name, value, ts, timestampOfLastDelete, flag);
  }
  else if ((mask & EXPIRATION_MASK) != 0)
  {
    int ttl = in.readInt();
    int expiration = in.readInt();
    long ts = in.readLong();
    ByteBuffer value = ByteBufferUtil.readWithLength(in);
    return BufferExpiringCell.create(name, value, ts, ttl, expiration, expireBefore, flag);
  }
  else
  {
    long ts = in.readLong();
    ByteBuffer value = ByteBufferUtil.readWithLength(in);
    return (mask & COUNTER_UPDATE_MASK) != 0
        ? new BufferCounterUpdateCell(name, value, ts)
        : ((mask & DELETION_MASK) == 0
         ? new BufferCell(name, value, ts)
         : new BufferDeletedCell(name, value, ts));
  }
}

  /**
   * Deserializes the first and last key stored in the summary
   *
   * Only for use by offline tools like SSTableMetadataViewer, otherwise SSTable.first/last should be used.
   */
  public Pair<DecoratedKey, DecoratedKey> deserializeFirstLastKey(DataInputStream in, IPartitioner partitioner, boolean haveSamplingLevel) throws IOException
  {
    in.skipBytes(4); // minIndexInterval
    int offsetCount = in.readInt();
    long offheapSize = in.readLong();
    if (haveSamplingLevel)
      in.skipBytes(8); // samplingLevel, fullSamplingSummarySize
    in.skip(offsetCount * 4);
    in.skip(offheapSize - offsetCount * 4);
    DecoratedKey first = partitioner.decorateKey(ByteBufferUtil.readWithLength(in));
    DecoratedKey last = partitioner.decorateKey(ByteBufferUtil.readWithLength(in));
    return Pair.create(first, last);
  }
}

  /**
   * Deserializes the first and last key stored in the summary
   *
   * Only for use by offline tools like SSTableMetadataViewer, otherwise SSTable.first/last should be used.
   */
  public Pair<DecoratedKey, DecoratedKey> deserializeFirstLastKey(DataInputStream in, IPartitioner partitioner, boolean haveSamplingLevel) throws IOException
  {
    in.skipBytes(4); // minIndexInterval
    int offsetCount = in.readInt();
    long offheapSize = in.readLong();
    if (haveSamplingLevel)
      in.skipBytes(8); // samplingLevel, fullSamplingSummarySize
    in.skip(offsetCount * 4);
    in.skip(offheapSize - offsetCount * 4);
    DecoratedKey first = partitioner.decorateKey(ByteBufferUtil.readWithLength(in));
    DecoratedKey last = partitioner.decorateKey(ByteBufferUtil.readWithLength(in));
    return Pair.create(first, last);
  }
}

  /**
   * Deserializes the first and last key stored in the summary
   *
   * Only for use by offline tools like SSTableMetadataViewer, otherwise SSTable.first/last should be used.
   */
  public Pair<DecoratedKey, DecoratedKey> deserializeFirstLastKey(DataInputStream in, IPartitioner partitioner, boolean haveSamplingLevel) throws IOException
  {
    in.skipBytes(4); // minIndexInterval
    int offsetCount = in.readInt();
    long offheapSize = in.readLong();
    if (haveSamplingLevel)
      in.skipBytes(8); // samplingLevel, fullSamplingSummarySize
    in.skip(offsetCount * 4);
    in.skip(offheapSize - offsetCount * 4);
    DecoratedKey first = partitioner.decorateKey(ByteBufferUtil.readWithLength(in));
    DecoratedKey last = partitioner.decorateKey(ByteBufferUtil.readWithLength(in));
    return Pair.create(first, last);
  }
}

  /**
   * Deserializes the first and last key stored in the summary
   *
   * Only for use by offline tools like SSTableMetadataViewer, otherwise SSTable.first/last should be used.
   */
  public Pair<DecoratedKey, DecoratedKey> deserializeFirstLastKey(DataInputStream in, IPartitioner partitioner, boolean haveSamplingLevel) throws IOException
  {
    in.skipBytes(4); // minIndexInterval
    int offsetCount = in.readInt();
    long offheapSize = in.readLong();
    if (haveSamplingLevel)
      in.skipBytes(8); // samplingLevel, fullSamplingSummarySize
    in.skip(offsetCount * 4);
    in.skip(offheapSize - offsetCount * 4);
    DecoratedKey first = partitioner.decorateKey(ByteBufferUtil.readWithLength(in));
    DecoratedKey last = partitioner.decorateKey(ByteBufferUtil.readWithLength(in));
    return Pair.create(first, last);
  }
}

    iStream, getPartitioner(), descriptor.version.hasSamplingLevel(),
    metadata.params.minIndexInterval, metadata.params.maxIndexInterval);
first = decorateKey(ByteBufferUtil.readWithLength(iStream));
last = decorateKey(ByteBufferUtil.readWithLength(iStream));

    iStream, getPartitioner(), descriptor.version.hasSamplingLevel(),
    metadata.params.minIndexInterval, metadata.params.maxIndexInterval);
first = decorateKey(ByteBufferUtil.readWithLength(iStream));
last = decorateKey(ByteBufferUtil.readWithLength(iStream));

    iStream, getPartitioner(), descriptor.version.hasSamplingLevel(),
    metadata.params.minIndexInterval, metadata.params.maxIndexInterval);
first = decorateKey(ByteBufferUtil.readWithLength(iStream));
last = decorateKey(ByteBufferUtil.readWithLength(iStream));

final ByteBuffer partitionKey = ByteBufferUtil.readWithLength(in);
final ByteBuffer cellName = ByteBufferUtil.readWithLength(in);
if (cfs == null || !cfs.metadata.isCounter() || !cfs.isCounterCacheEnabled())
  return null;

final ByteBuffer partitionKey = ByteBufferUtil.readWithLength(in);
final ByteBuffer cellName = ByteBufferUtil.readWithLength(in);
if (cfs == null || !cfs.metadata.isCounter() || !cfs.isCounterCacheEnabled())
  return null;

final ByteBuffer partitionKey = ByteBufferUtil.readWithLength(in);
ByteBuffer cellNameBuffer = ByteBufferUtil.readWithLength(in);
if (cfs == null || !cfs.metadata.isCounter() || !cfs.isCounterCacheEnabled())
  return null;

ByteBuffer value = ByteBufferUtil.readWithLength(in);
if (flag == SerializationHelper.Flag.FROM_REMOTE || (flag == SerializationHelper.Flag.LOCAL && CounterContext.instance().shouldClearLocal(value)))
  value = CounterContext.instance().clearAllLocal(value);
int expiration = in.readInt();
long ts = in.readLong();
ByteBuffer value = ByteBufferUtil.readWithLength(in);
return new LegacyCell(LegacyCell.Kind.EXPIRING, decodeCellName(metadata, cellname, readAllAsDynamic), value, ts, expiration, ttl);
ByteBuffer value = ByteBufferUtil.readWithLength(in);
LegacyCellName name = decodeCellName(metadata, cellname, readAllAsDynamic);
return (mask & COUNTER_UPDATE_MASK) != 0

ByteBuffer value = ByteBufferUtil.readWithLength(in);
if (flag == SerializationHelper.Flag.FROM_REMOTE || (flag == SerializationHelper.Flag.LOCAL && CounterContext.instance().shouldClearLocal(value)))
  value = CounterContext.instance().clearAllLocal(value);
int expiration = in.readInt();
long ts = in.readLong();
ByteBuffer value = ByteBufferUtil.readWithLength(in);
return new LegacyCell(LegacyCell.Kind.EXPIRING, decodeCellName(metadata, cellname, readAllAsDynamic), value, ts, expiration, ttl);
ByteBuffer value = ByteBufferUtil.readWithLength(in);
LegacyCellName name = decodeCellName(metadata, cellname, readAllAsDynamic);
return (mask & COUNTER_UPDATE_MASK) != 0

ByteBuffer value = ByteBufferUtil.readWithLength(in);
if (flag == SerializationHelper.Flag.FROM_REMOTE || (flag == SerializationHelper.Flag.LOCAL && CounterContext.instance().shouldClearLocal(value)))
  value = CounterContext.instance().clearAllLocal(value);
int expiration = in.readInt();
long ts = in.readLong();
ByteBuffer value = ByteBufferUtil.readWithLength(in);
return new LegacyCell(LegacyCell.Kind.EXPIRING, decodeCellName(metadata, cellname, readAllAsDynamic), value, ts, expiration, ttl);
ByteBuffer value = ByteBufferUtil.readWithLength(in);
LegacyCellName name = decodeCellName(metadata, cellname, readAllAsDynamic);
return (mask & COUNTER_UPDATE_MASK) != 0

ByteBuffer value = ByteBufferUtil.readWithLength(in);
if (flag == SerializationHelper.Flag.FROM_REMOTE || (flag == SerializationHelper.Flag.LOCAL && CounterContext.instance().shouldClearLocal(value)))
  value = CounterContext.instance().clearAllLocal(value);
int expiration = in.readInt();
long ts = in.readLong();
ByteBuffer value = ByteBufferUtil.readWithLength(in);
return new LegacyCell(LegacyCell.Kind.EXPIRING, decodeCellName(metadata, cellname, readAllAsDynamic), value, ts, expiration, ttl);
ByteBuffer value = ByteBufferUtil.readWithLength(in);
LegacyCellName name = decodeCellName(metadata, cellname, readAllAsDynamic);
return (mask & COUNTER_UPDATE_MASK) != 0

  public Future<Pair<RowCacheKey, IRowCacheEntry>> deserialize(DataInputStream in, final ColumnFamilyStore cfs) throws IOException
  {
    //Keyspace and CF name are deserialized by AutoSaving cache and used to fetch the CFS provided as a
    //parameter so they aren't deserialized here, even though they are serialized by this serializer
    final ByteBuffer buffer = ByteBufferUtil.readWithLength(in);
    if (cfs == null  || !cfs.isRowCacheEnabled())
      return null;
    assert(!cfs.isIndex());
    return StageManager.getStage(Stage.READ).submit(new Callable<Pair<RowCacheKey, IRowCacheEntry>>()
    {
      public Pair<RowCacheKey, IRowCacheEntry> call() throws Exception
      {
        DecoratedKey key = cfs.partitioner.decorateKey(buffer);
        QueryFilter cacheFilter = new QueryFilter(key, cfs.getColumnFamilyName(), cfs.readFilterForCache(), Integer.MIN_VALUE);
        ColumnFamily data = cfs.getTopLevelColumns(cacheFilter, Integer.MIN_VALUE);
        return Pair.create(new RowCacheKey(cfs.metadata.ksAndCFName, key), (IRowCacheEntry) data);
      }
    });
  }
}

  public Future<Pair<RowCacheKey, IRowCacheEntry>> deserialize(DataInputPlus in, final ColumnFamilyStore cfs) throws IOException
  {
    //Keyspace and CF name are deserialized by AutoSaving cache and used to fetch the CFS provided as a
    //parameter so they aren't deserialized here, even though they are serialized by this serializer
    final ByteBuffer buffer = ByteBufferUtil.readWithLength(in);
    if (cfs == null  || !cfs.isRowCacheEnabled())
      return null;
    final int rowsToCache = cfs.metadata.params.caching.rowsPerPartitionToCache();
    assert(!cfs.isIndex());//Shouldn't have row cache entries for indexes
    return StageManager.getStage(Stage.READ).submit(new Callable<Pair<RowCacheKey, IRowCacheEntry>>()
    {
      public Pair<RowCacheKey, IRowCacheEntry> call() throws Exception
      {
        DecoratedKey key = cfs.decorateKey(buffer);
        int nowInSec = FBUtilities.nowInSeconds();
        SinglePartitionReadCommand cmd = SinglePartitionReadCommand.fullPartitionRead(cfs.metadata, nowInSec, key);
        try (ReadExecutionController controller = cmd.executionController(); UnfilteredRowIterator iter = cmd.queryMemtableAndDisk(cfs, controller))
        {
          CachedPartition toCache = CachedBTreePartition.create(DataLimits.cqlLimits(rowsToCache).filter(iter, nowInSec, true), nowInSec);
          return Pair.create(new RowCacheKey(cfs.metadata.ksAndCFName, key), (IRowCacheEntry)toCache);
        }
      }
    });
  }
}

  public Future<Pair<RowCacheKey, IRowCacheEntry>> deserialize(DataInputPlus in, final ColumnFamilyStore cfs) throws IOException
  {
    //Keyspace and CF name are deserialized by AutoSaving cache and used to fetch the CFS provided as a
    //parameter so they aren't deserialized here, even though they are serialized by this serializer
    final ByteBuffer buffer = ByteBufferUtil.readWithLength(in);
    if (cfs == null  || !cfs.isRowCacheEnabled())
      return null;
    final int rowsToCache = cfs.metadata.params.caching.rowsPerPartitionToCache();
    assert(!cfs.isIndex());//Shouldn't have row cache entries for indexes
    return StageManager.getStage(Stage.READ).submit(new Callable<Pair<RowCacheKey, IRowCacheEntry>>()
    {
      public Pair<RowCacheKey, IRowCacheEntry> call() throws Exception
      {
        DecoratedKey key = cfs.decorateKey(buffer);
        int nowInSec = FBUtilities.nowInSeconds();
        SinglePartitionReadCommand cmd = SinglePartitionReadCommand.fullPartitionRead(cfs.metadata, nowInSec, key);
        try (ReadExecutionController controller = cmd.executionController(); UnfilteredRowIterator iter = cmd.queryMemtableAndDisk(cfs, controller))
        {
          CachedPartition toCache = CachedBTreePartition.create(DataLimits.cqlLimits(rowsToCache).filter(iter, nowInSec, true), nowInSec);
          return Pair.create(new RowCacheKey(cfs.metadata.ksAndCFName, key), (IRowCacheEntry)toCache);
        }
      }
    });
  }
}

  public Future<Pair<RowCacheKey, IRowCacheEntry>> deserialize(DataInputPlus in, final ColumnFamilyStore cfs) throws IOException
  {
    //Keyspace and CF name are deserialized by AutoSaving cache and used to fetch the CFS provided as a
    //parameter so they aren't deserialized here, even though they are serialized by this serializer
    final ByteBuffer buffer = ByteBufferUtil.readWithLength(in);
    if (cfs == null  || !cfs.isRowCacheEnabled())
      return null;
    final int rowsToCache = cfs.metadata.params.caching.rowsPerPartitionToCache();
    assert(!cfs.isIndex());//Shouldn't have row cache entries for indexes
    return StageManager.getStage(Stage.READ).submit(new Callable<Pair<RowCacheKey, IRowCacheEntry>>()
    {
      public Pair<RowCacheKey, IRowCacheEntry> call() throws Exception
      {
        DecoratedKey key = cfs.decorateKey(buffer);
        int nowInSec = FBUtilities.nowInSeconds();
        SinglePartitionReadCommand cmd = SinglePartitionReadCommand.fullPartitionRead(cfs.metadata, nowInSec, key);
        try (ReadExecutionController controller = cmd.executionController(); UnfilteredRowIterator iter = cmd.queryMemtableAndDisk(cfs, controller))
        {
          CachedPartition toCache = CachedBTreePartition.create(DataLimits.cqlLimits(rowsToCache).filter(iter, nowInSec, true), nowInSec);
          return Pair.create(new RowCacheKey(cfs.metadata.ksAndCFName, key), (IRowCacheEntry)toCache);
        }
      }
    });
  }
}

    iStream, getPartitioner(), descriptor.version.hasSamplingLevel(),
    metadata.params.minIndexInterval, metadata.params.maxIndexInterval);
first = decorateKey(ByteBufferUtil.readWithLength(iStream));
last = decorateKey(ByteBufferUtil.readWithLength(iStream));

Popular methods of ByteBufferUtil

bytes
string
Decode a String representation.
bytesToHex
getArray
You should almost never use this. Instead, use the write* methods to avoid copies.
clone
hexToBytes
toFloat
toInt
Convert a byte buffer to an integer. Does not change the byte buffer position.
toLong
toDouble
readBytes
arrayCopy

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How to use readWithLengthmethodin org.apache.cassandra.utils.ByteBufferUtil

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