Package org.apache.zookeeper.server.quorum.flexible

Class QuorumMaj

java.lang.Object

org.apache.zookeeper.server.quorum.flexible.QuorumMaj

All Implemented Interfaces:

QuorumVerifier

Direct Known Subclasses:

QuorumOracleMaj

public class QuorumMaj
extends Object
implements QuorumVerifier

This class implements a validator for majority quorums. The implementation is straightforward.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	half

Constructor Summary

Constructors

Constructor	Description
QuorumMaj(Map<Long,QuorumPeer.QuorumServer> allMembers)	Defines a majority to avoid computing it every time.
QuorumMaj(Properties props)

Method Summary

Modifier and Type	Method	Description
boolean	containsQuorum(Set<Long> ackSet)	Verifies if a set is a majority.
boolean	equals(Object o)
Map<Long,QuorumPeer.QuorumServer>	getAllMembers()
Map<Long,QuorumPeer.QuorumServer>	getObservingMembers()
long	getVersion()
Map<Long,QuorumPeer.QuorumServer>	getVotingMembers()
long	getWeight(long id)	Returns weight of 1 by default.
int	hashCode()
void	setVersion(long ver)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.zookeeper.server.quorum.flexible.QuorumVerifier

askOracle, getNeedOracle, getOraclePath, overrideQuorumDecision, revalidateOutstandingProp, revalidateVoteset, updateNeedOracle

Field Detail

half

protected int half

Constructor Detail

QuorumMaj

public QuorumMaj(Map<Long,QuorumPeer.QuorumServer> allMembers)

Defines a majority to avoid computing it every time.

QuorumMaj

public QuorumMaj(Properties props)
          throws QuorumPeerConfig.ConfigException

Throws:

QuorumPeerConfig.ConfigException

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Specified by:

equals in interface QuorumVerifier

Overrides:

equals in class Object

getWeight

public long getWeight(long id)

Returns weight of 1 by default.

Specified by:

getWeight in interface QuorumVerifier

Parameters:

id -

toString

public String toString()

Specified by:

toString in interface QuorumVerifier

Overrides:

toString in class Object

containsQuorum

public boolean containsQuorum(Set<Long> ackSet)

Verifies if a set is a majority. Assumes that ackSet contains acks only from votingMembers

Specified by:

containsQuorum in interface QuorumVerifier

getAllMembers

public Map<Long,QuorumPeer.QuorumServer> getAllMembers()

Specified by:

getAllMembers in interface QuorumVerifier

getVotingMembers

public Map<Long,QuorumPeer.QuorumServer> getVotingMembers()

Specified by:

getVotingMembers in interface QuorumVerifier

getObservingMembers

public Map<Long,QuorumPeer.QuorumServer> getObservingMembers()

Specified by:

getObservingMembers in interface QuorumVerifier

getVersion

public long getVersion()

Specified by:

getVersion in interface QuorumVerifier

setVersion

public void setVersion(long ver)

Specified by:

setVersion in interface QuorumVerifier