Package org.apache.bookkeeper.client

Class ReadLastConfirmedAndEntryOp.SequenceReadRequest

java.lang.Object

org.apache.bookkeeper.client.ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

org.apache.bookkeeper.client.ReadLastConfirmedAndEntryOp.SequenceReadRequest

All Implemented Interfaces:

AutoCloseable

Enclosing class:

ReadLastConfirmedAndEntryOp

class ReadLastConfirmedAndEntryOp.SequenceReadRequest
extends ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

Field Summary

Fields

Modifier and Type	Field	Description
(package private) final BitSet	emptyResponseReplicas
(package private) final BitSet	erroredReplicas
(package private) int	nextReplicaIndexToReadFrom
(package private) static final int	NOT_FOUND
(package private) final BitSet	sentReplicas

Fields inherited from class org.apache.bookkeeper.client.ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

complete, ensemble, entryImpl, firstError, numMissedEntryReads, orderedEnsemble, rc, writeSet

Constructor Summary

Constructors

Constructor	Description
SequenceReadRequest(List<BookieId> ensemble, long lId, long eId)

Method Summary

Modifier and Type	Method	Description
(package private) boolean	complete(int bookieIndex, BookieId host, io.netty.buffer.ByteBuf buffer, long entryId)	Complete the read request from host.
(package private) void	logErrorAndReattemptRead(int bookieIndex, BookieId host, String errMsg, int rc)	Log error errMsg and reattempt read from host.
(package private) BookieId	maybeSendSpeculativeRead(BitSet heardFrom)	Send to next replica speculatively, if required and possible.
(package private) void	read()	Execute the read request.
(package private) BookieId	sendNextRead()

Methods inherited from class org.apache.bookkeeper.client.ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

close, fail, getFirstError, getRc, isComplete, toString

Methods inherited from class java.lang.Object

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

Field Details

NOT_FOUND

static final int NOT_FOUND

See Also:

• Constant Field Values

nextReplicaIndexToReadFrom

int nextReplicaIndexToReadFrom

sentReplicas

final BitSet sentReplicas

erroredReplicas

final BitSet erroredReplicas

emptyResponseReplicas

final BitSet emptyResponseReplicas

Constructor Details

SequenceReadRequest

SequenceReadRequest(List<BookieId> ensemble,
 long lId,
 long eId)

Method Details

maybeSendSpeculativeRead

BookieId maybeSendSpeculativeRead(BitSet heardFrom)

Send to next replica speculatively, if required and possible. This returns the host we may have sent to for unit testing.

Specified by:

maybeSendSpeculativeRead in class ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

Parameters:

heardFrom - the set of hosts that we already received responses.

Returns:

host we sent to if we sent. null otherwise.

read

void read()

Description copied from class: ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

Execute the read request.

Specified by:

read in class ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

sendNextRead

BookieId sendNextRead()

logErrorAndReattemptRead

void logErrorAndReattemptRead(int bookieIndex,
 BookieId host,
 String errMsg,
 int rc)

Description copied from class: ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

Log error errMsg and reattempt read from host.

Overrides:

logErrorAndReattemptRead in class ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

Parameters:

bookieIndex - bookie index

host - host that just respond

errMsg - error msg to log

rc - read result code

complete

boolean complete(int bookieIndex,
 BookieId host,
 io.netty.buffer.ByteBuf buffer,
 long entryId)

Description copied from class: ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

Complete the read request from host.

Overrides:

complete in class ReadLastConfirmedAndEntryOp.ReadLACAndEntryRequest

Parameters:

bookieIndex - bookie index

host - host that respond the read

buffer - the data buffer

Returns:

return true if we managed to complete the entry; otherwise return false if the read entry is not complete or it is already completed before