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

Class DataBlockHeaderImpl

java.lang.Object

org.apache.bookkeeper.mledger.offload.jcloud.impl.DataBlockHeaderImpl

All Implemented Interfaces:

DataBlockHeader

public class DataBlockHeaderImpl
extends Object
implements DataBlockHeader

The data block header in tiered storage for each data block.

Constructor Summary

Constructors

Constructor	Description
DataBlockHeaderImpl(long headerLength, long blockLength, long firstEntryId)

Method Summary

Modifier and Type	Method	Description
static DataBlockHeader	fromStream(InputStream stream)
long	getBlockLength()	Get the length of the block in bytes, including the header.
static int	getBlockMagicWord()
static int	getDataStartOffset()
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.
static DataBlockHeaderImpl	of(int blockLength, long firstEntryId)
InputStream	toStream()	Get the content of the data block header as InputStream.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DataBlockHeaderImpl

public DataBlockHeaderImpl(long headerLength,
                           long blockLength,
                           long firstEntryId)

Method Detail

of

public static DataBlockHeaderImpl of(int blockLength,
                                     long firstEntryId)

fromStream

public static DataBlockHeader fromStream(InputStream stream)
                                  throws IOException

Throws:

IOException

getBlockMagicWord

public static int getBlockMagicWord()

getDataStartOffset

public static int getDataStartOffset()

getBlockLength

public long getBlockLength()

Description copied from interface: DataBlockHeader

Get the length of the block in bytes, including the header.

Specified by:

getBlockLength in interface DataBlockHeader

getHeaderLength

public long getHeaderLength()

Description copied from interface: DataBlockHeader

Get the size of this DataBlockHeader.

Specified by:

getHeaderLength in interface DataBlockHeader

getFirstEntryId

public long getFirstEntryId()

Description copied from interface: DataBlockHeader

Get the message entry Id for the first message that stored in this data block.

Specified by:

getFirstEntryId in interface DataBlockHeader

toStream

public InputStream toStream()

Get the content of the data block header as InputStream. Read out in format: [ magic_word -- int ][ block_len -- int ][ first_entry_id -- long] [padding zeros]

Specified by:

toStream in interface DataBlockHeader

toString

public String toString()

Overrides:

toString in class Object