org.apache.bookkeeper.mledger.offload.jcloud

Class BlockAwareSegmentInputStream

java.lang.Object

java.io.InputStream

org.apache.bookkeeper.mledger.offload.jcloud.BlockAwareSegmentInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

BlockAwareSegmentInputStreamImpl

public abstract class BlockAwareSegmentInputStream
extends InputStream

The BlockAwareSegmentInputStream for each cold storage data block. This interface should be implemented while extends InputStream. It gets data from ledger, and will be read out the content for a data block. DataBlockHeader + entries(each with format[[entry_size -- int][entry_id -- long][entry_data]]) + padding

Constructor Summary

Constructors

Constructor and Description
BlockAwareSegmentInputStream()

Method Summary

Modifier and Type	Method and Description
abstract int	getBlockEntryBytesCount() Get sum of entries data size read from the this InputStream.
abstract int	getBlockEntryCount() Get entry count that read out from this InputStream.
abstract int	getBlockSize() Get block size that could read out from this InputStream.
abstract long	getEndEntryId() Get end entry id contained in this InputStream.
abstract org.apache.bookkeeper.client.api.ReadHandle	getLedger() Get the ledger, from which this InputStream read data.
abstract long	getStartEntryId() Get start entry id contained in this InputStream.

Methods inherited from class java.io.InputStream

available, close, mark, markSupported, read, read, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockAwareSegmentInputStream

public BlockAwareSegmentInputStream()

Method Detail

getLedger

public abstract org.apache.bookkeeper.client.api.ReadHandle getLedger()

Get the ledger, from which this InputStream read data.

getStartEntryId

public abstract long getStartEntryId()

Get start entry id contained in this InputStream.

Returns:

the start entry id

getBlockSize

public abstract int getBlockSize()

Get block size that could read out from this InputStream.

Returns:

the block size

getBlockEntryCount

public abstract int getBlockEntryCount()

Get entry count that read out from this InputStream.

Returns:

the block entry count

getEndEntryId

public abstract long getEndEntryId()

Get end entry id contained in this InputStream.

Returns:

the end entry id

getBlockEntryBytesCount

public abstract int getBlockEntryBytesCount()

Get sum of entries data size read from the this InputStream.

Returns:

the block entry bytes count