com.sleepycat.je.rep.elections

Class Protocol

java.lang.Object

com.sleepycat.je.rep.impl.TextProtocol

com.sleepycat.je.rep.elections.Protocol

public class Protocol
extends TextProtocol

Defines the request/response messages used in the implementation of elections. From Proposer to Acceptor: Propose -> Promise | Reject Accept -> Accepted | Reject From Proposer initiator to Learners: Result -> none The following exchange is not part of the elections process, but is used by the Monitor to query a Learner for the latest election result it's aware of, when the Monitor first starts up. It is also used by nodes and utilities that are attempting to find the master. From Monitor to Learner MasterQuery -> MasterQueryResponse | None

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	Protocol.Accept Accept request issued in Phase 2 of paxos.
class	Protocol.Accepted Response to a successful Accept message.
class	Protocol.MasterQuery Used to query the Learner for a current master
class	Protocol.MasterQueryResponse The response to a Master Query request.
class	Protocol.Promise Promise response message.
class	Protocol.Propose Propose request used in Phase 1 of Paxos
class	Protocol.Reject Reject response to a message.
class	Protocol.Result Used to inform Learners of a "chosen value".
class	Protocol.Shutdown
static class	Protocol.StringValue A String based value implementation used as the "default" Value
static interface	Protocol.Value
static interface	Protocol.ValueParser

Nested classes/interfaces inherited from class com.sleepycat.je.rep.impl.TextProtocol

TextProtocol.Fail, TextProtocol.InvalidMessageException, TextProtocol.Message, TextProtocol.MessageError, TextProtocol.MessageExchange, TextProtocol.MessageOp, TextProtocol.OK, TextProtocol.ProtocolError, TextProtocol.RequestMessage, TextProtocol.ResponseMessage, TextProtocol.StringFormatable, TextProtocol.TOKENS, TextProtocol.WireFormatable

Field Summary

Fields

Modifier and Type	Field and Description
TextProtocol.MessageOp	ACCEPT
TextProtocol.MessageOp	ACCEPTED
TextProtocol.MessageOp	MASTER_QUERY
TextProtocol.MessageOp	MASTER_QUERY_RESPONSE
TextProtocol.MessageOp	PROMISE
TextProtocol.MessageOp	PROPOSE
TextProtocol.MessageOp	REJECT
TextProtocol.MessageOp	RESULT
TextProtocol.MessageOp	SHUTDOWN

Fields inherited from class com.sleepycat.je.rep.impl.TextProtocol

channelFactory, FAIL_RESP, formatter, logger, messageNocheckSuffix, OK_RESP, PROTOCOL_ERROR, repImpl, SEPARATOR, SEPARATOR_REGEXP

Constructor Summary

Constructors

Constructor and Description
Protocol(Proposer.ProposalParser proposalParser, Protocol.ValueParser valueParser, String groupName, NameIdPair nameIdPair, RepImpl repImpl, DataChannelFactory channelFactory) Creates an instance of the Protocol.

Method Summary

Methods inherited from class com.sleepycat.je.rep.impl.TextProtocol

getMajorVersionNumber, getNameIdPair, getOpenTimeout, getOps, getReadTimeout, getRequestMessage, initializeMessageOps, messageCount, parse, parseRequest, process, processIME, replaceOp, setSerDeHook, setTimeouts, updateNodeIds

Methods inherited from class java.lang.Object

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

Field Detail

PROPOSE

public final TextProtocol.MessageOp PROPOSE

ACCEPT

public final TextProtocol.MessageOp ACCEPT

RESULT

public final TextProtocol.MessageOp RESULT

MASTER_QUERY

public final TextProtocol.MessageOp MASTER_QUERY

SHUTDOWN

public final TextProtocol.MessageOp SHUTDOWN

REJECT

public final TextProtocol.MessageOp REJECT

PROMISE

public final TextProtocol.MessageOp PROMISE

ACCEPTED

public final TextProtocol.MessageOp ACCEPTED

MASTER_QUERY_RESPONSE

public final TextProtocol.MessageOp MASTER_QUERY_RESPONSE

Constructor Detail

Protocol

public Protocol(Proposer.ProposalParser proposalParser,
                Protocol.ValueParser valueParser,
                String groupName,
                NameIdPair nameIdPair,
                RepImpl repImpl,
                DataChannelFactory channelFactory)

Creates an instance of the Protocol.

Parameters:

proposalParser - parses a string into a Proposal object.

valueParser - parses a string into a Value object.

groupName - the name of the group running the election process.

nameIdPair - a unique identifier for this election participant.