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

Class BlockAwareSegmentInputStreamImpl

java.lang.Object

java.io.InputStream

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

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

All Implemented Interfaces:

Closeable, AutoCloseable

public class BlockAwareSegmentInputStreamImpl
extends BlockAwareSegmentInputStream

The BlockAwareSegmentInputStreamImpl for each cold storage data block. 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	Description
BlockAwareSegmentInputStreamImpl(org.apache.bookkeeper.client.api.ReadHandle ledger, long startEntryId, int blockSize)

Method Summary

Modifier and Type	Method	Description
static int	calculateBlockSize(int maxBlockSize, org.apache.bookkeeper.client.api.ReadHandle readHandle, long firstEntryToWrite, long entryBytesAlreadyWritten)
void	close()
int	getBlockEntryBytesCount()	Get sum of entries data size read from the this InputStream.
int	getBlockEntryCount()	Get entry count that read out from this InputStream.
int	getBlockSize()	Get block size that could read out from this InputStream.
int	getDataBlockFullOffset()
long	getEndEntryId()	Get end entry id contained in this InputStream.
static long	getHeaderSize()
org.apache.bookkeeper.client.api.ReadHandle	getLedger()	Get the ledger, from which this InputStream read data.
long	getStartEntryId()	Get start entry id contained in this InputStream.
int	read()
int	read(byte[] b, int off, int len)

Methods inherited from class java.io.InputStream

available, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockAwareSegmentInputStreamImpl

public BlockAwareSegmentInputStreamImpl(org.apache.bookkeeper.client.api.ReadHandle ledger,
                                        long startEntryId,
                                        int blockSize)

Method Detail

read

public int read(byte[] b,
                int off,
                int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException

getLedger

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

Description copied from class: BlockAwareSegmentInputStream

Get the ledger, from which this InputStream read data.

Specified by:

getLedger in class BlockAwareSegmentInputStream

getStartEntryId

public long getStartEntryId()

Description copied from class: BlockAwareSegmentInputStream

Get start entry id contained in this InputStream.

Specified by:

getStartEntryId in class BlockAwareSegmentInputStream

Returns:

the start entry id

getBlockSize

public int getBlockSize()

Description copied from class: BlockAwareSegmentInputStream

Get block size that could read out from this InputStream.

Specified by:

getBlockSize in class BlockAwareSegmentInputStream

Returns:

the block size

getDataBlockFullOffset

public int getDataBlockFullOffset()

getBlockEntryCount

public int getBlockEntryCount()

Description copied from class: BlockAwareSegmentInputStream

Get entry count that read out from this InputStream.

Specified by:

getBlockEntryCount in class BlockAwareSegmentInputStream

Returns:

the block entry count

getEndEntryId

public long getEndEntryId()

Description copied from class: BlockAwareSegmentInputStream

Get end entry id contained in this InputStream.

Specified by:

getEndEntryId in class BlockAwareSegmentInputStream

Returns:

the end entry id

getBlockEntryBytesCount

public int getBlockEntryBytesCount()

Description copied from class: BlockAwareSegmentInputStream

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

Specified by:

getBlockEntryBytesCount in class BlockAwareSegmentInputStream

Returns:

the block entry bytes count

getHeaderSize

public static long getHeaderSize()

calculateBlockSize

public static int calculateBlockSize(int maxBlockSize,
                                     org.apache.bookkeeper.client.api.ReadHandle readHandle,
                                     long firstEntryToWrite,
                                     long entryBytesAlreadyWritten)