org.apache.bookkeeper.mledger.offload.jcloud

Interface DataBlockHeader

All Known Implementing Classes:

DataBlockHeaderImpl, StreamingDataBlockHeaderImpl

@InterfaceStability.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

Modifier and Type	Method and 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.
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

InputStream toStream()

Get the content of the data block header as InputStream. Read out in current format.