Examples of org.iq80.leveldb.table.BlockEntry

org.iq80.leveldb.DBException

Binary Structure

name	offset	length	description
shared key length	0	vary	variable length encoded int: size of shared key prefix with the key from the previous entry
non-shared key length	vary	vary	variable length encoded int: size of non-shared key suffix in this entry
value length	vary	vary	variable length encoded int: size of value in this entry
non-shared key	vary	non-shared key length	non-shared key data
value	vary	value length	value data

        // close the block
        Slice raw = blockBuilder.finish();


        // attempt to compress the block
        Slice blockContents = raw;
        CompressionType blockCompressionType = CompressionType.NONE;
        if (compressionType == CompressionType.SNAPPY) {
            ensureCompressedOutputCapacity(maxCompressedLength(raw.length()));
            try {
                int compressedSize = Snappy.compress(raw.getRawArray(), raw.getRawOffset(), raw.length(), compressedOutput.getRawArray(), 0);

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    }


    public static BlockTrailer readBlockTrailer(Slice slice)
    {
        SliceInput sliceInput = slice.input();
        CompressionType compressionType = CompressionType.getCompressionTypeByPersistentId(sliceInput.readUnsignedByte());
        int crc32c = sliceInput.readInt();
        return new BlockTrailer(compressionType, crc32c);
    }

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        }


        this.databaseDir = databaseDir;


        //use custom comparator if set
        DBComparator comparator = options.comparator();
        UserComparator userComparator;
        if (comparator != null) {
            userComparator = new CustomUserComparator(comparator);
        }else{
            userComparator = new BytewiseComparator();

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    try {
      iter.seek(key);
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }

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    try {
      iter.seekToFirst();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }

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    try {
      iter.seekToLast();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }

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    try {
      return iter.hasNext();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }

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    try {
      return iter.next();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }

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    try {
      return iter.peekNext();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }

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    try {
      return iter.hasPrev();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }

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