Package org.apache.bookkeeper.mledger.offload.jcloud

Interface DataBlockHeader

  • All Known Implementing Classes:
    DataBlockHeaderImpl, StreamingDataBlockHeaderImpl
    @Unstable
public interface DataBlockHeader
    The data block header in tiered storage for each data block.

    Currently, It is in format: [ magic_word -- int ][ block_len -- int ][ first_entry_id -- long][padding] with the size: 4 + 4 + 8 + padding = 128 Bytes

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      long getBlockLength()
      Get the length of the block in bytes, including the header.
      long getFirstEntryId()
      Get the message entry Id for the first message that stored in this data block.
      long getHeaderLength()
      Get the size of this DataBlockHeader.
      java.io.InputStream toStream()
      Get the content of the data block header as InputStream.

    • Method Detail

      • getBlockLength

        long getBlockLength()
        Get the length of the block in bytes, including the header.

      • getFirstEntryId

        long getFirstEntryId()
        Get the message entry Id for the first message that stored in this data block.

      • getHeaderLength

        long getHeaderLength()
        Get the size of this DataBlockHeader.

      • toStream

        java.io.InputStream toStream()
        Get the content of the data block header as InputStream. Read out in current format.