Examples with ByteBuff org.apache.hadoop.hbase.nio.ByteBuff used on opensource projects

Example 21 with ByteBuff

use of org.apache.hadoop.hbase.nio.ByteBuff in project hbase by apache.

the class HFileBlock method unpack.

/**
   * Retrieves the decompressed/decrypted view of this block. An encoded block remains in its
   * encoded structure. Internal structures are shared between instances where applicable.
   */
HFileBlock unpack(HFileContext fileContext, FSReader reader) throws IOException {
    if (!fileContext.isCompressedOrEncrypted()) {
        // encryption details.
        return this;
    }
    HFileBlock unpacked = new HFileBlock(this);
    // allocates space for the decompressed block
    unpacked.allocateBuffer();
    HFileBlockDecodingContext ctx = blockType == BlockType.ENCODED_DATA ? reader.getBlockDecodingContext() : reader.getDefaultBlockDecodingContext();
    ByteBuff dup = this.buf.duplicate();
    dup.position(this.headerSize());
    dup = dup.slice();
    ctx.prepareDecoding(unpacked.getOnDiskSizeWithoutHeader(), unpacked.getUncompressedSizeWithoutHeader(), unpacked.getBufferWithoutHeader(), dup);
    return unpacked;
}

Example 22 with ByteBuff

use of org.apache.hadoop.hbase.nio.ByteBuff in project hbase by apache.

the class HFileBlock method getByteStream.

/**
   * @return a byte stream reading the data + checksum of this block
   */
DataInputStream getByteStream() {
    ByteBuff dup = this.buf.duplicate();
    dup.position(this.headerSize());
    return new DataInputStream(new ByteBuffInputStream(dup));
}

Example 23 with ByteBuff

use of org.apache.hadoop.hbase.nio.ByteBuff in project hbase by apache.

the class CompoundBloomFilter method contains.

@Override
public boolean contains(byte[] key, int keyOffset, int keyLength, ByteBuff bloom) {
    int block = index.rootBlockContainingKey(key, keyOffset, keyLength);
    if (block < 0) {
        // This key is not in the file.
        return false;
    }
    boolean result;
    HFileBlock bloomBlock = getBloomBlock(block);
    try {
        ByteBuff bloomBuf = bloomBlock.getBufferReadOnly();
        result = BloomFilterUtil.contains(key, keyOffset, keyLength, bloomBuf, bloomBlock.headerSize(), bloomBlock.getUncompressedSizeWithoutHeader(), hash, hashCount);
    } finally {
        // After the use return back the block if it was served from a cache.
        reader.returnBlock(bloomBlock);
    }
    if (numPositivesPerChunk != null && result) {
        // Update statistics. Only used in unit tests.
        ++numPositivesPerChunk[block];
    }
    return result;
}