org.apache.zookeeper.server.quorum

Class UpgradeableSessionTracker

java.lang.Object

org.apache.zookeeper.server.quorum.UpgradeableSessionTracker

All Implemented Interfaces:

SessionTracker

Direct Known Subclasses:

LeaderSessionTracker, LearnerSessionTracker

public abstract class UpgradeableSessionTracker
extends Object
implements SessionTracker

A session tracker that supports upgradeable local sessions.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.zookeeper.server.SessionTracker

SessionTracker.Session, SessionTracker.SessionExpirer

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	localSessionsEnabled
protected LocalSessionTracker	localSessionTracker

Constructor Summary

Constructors

Constructor and Description
UpgradeableSessionTracker()

Method Summary

Modifier and Type	Method and Description
void	checkGlobalSession(long sessionId, Object owner) Strictly check that a given session is a global session or not
void	createLocalSessionTracker(SessionTracker.SessionExpirer expirer, int tickTime, long id, ZooKeeperServerListener listener)
void	finishedUpgrading(long sessionId)
long	getLocalSessionCount() If this session tracker supports local sessions, return how many.
abstract boolean	isGlobalSession(long sessionId)
boolean	isLocalSession(long sessionId)
boolean	isLocalSessionsEnabled()
boolean	isTrackingSession(long sessionId)
boolean	isUpgradingSession(long sessionId)
protected void	removeLocalSession(long sessionId)
void	start()
int	upgradeSession(long sessionId) Upgrades the session to a global session.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.zookeeper.server.SessionTracker

checkSession, commitSession, createSession, dumpSessions, getSessionExpiryMap, removeSession, setOwner, setSessionClosing, shutdown, touchSession, trackSession

Field Detail

localSessionTracker

protected LocalSessionTracker localSessionTracker

localSessionsEnabled

protected boolean localSessionsEnabled

Constructor Detail

UpgradeableSessionTracker

public UpgradeableSessionTracker()

Method Detail

start

public void start()

createLocalSessionTracker

public void createLocalSessionTracker(SessionTracker.SessionExpirer expirer,
                                      int tickTime,
                                      long id,
                                      ZooKeeperServerListener listener)

isTrackingSession

public boolean isTrackingSession(long sessionId)

Specified by:

isTrackingSession in interface SessionTracker

Returns:

whether or not the SessionTracker is aware of this session

isLocalSession

public boolean isLocalSession(long sessionId)

isLocalSessionsEnabled

public boolean isLocalSessionsEnabled()

Specified by:

isLocalSessionsEnabled in interface SessionTracker

isUpgradingSession

public boolean isUpgradingSession(long sessionId)

finishedUpgrading

public void finishedUpgrading(long sessionId)

isGlobalSession

public abstract boolean isGlobalSession(long sessionId)

upgradeSession

public int upgradeSession(long sessionId)

Upgrades the session to a global session. This simply removes the session from the local tracker and marks it as global. It is up to the caller to actually queue up a transaction for the session.

Parameters:

sessionId -

Returns:

session timeout (-1 if not a local session)

removeLocalSession

protected void removeLocalSession(long sessionId)

checkGlobalSession

public void checkGlobalSession(long sessionId,
                               Object owner)
                        throws KeeperException.SessionExpiredException,
                               KeeperException.SessionMovedException

Description copied from interface: SessionTracker

Strictly check that a given session is a global session or not

Specified by:

checkGlobalSession in interface SessionTracker

Throws:

KeeperException.SessionExpiredException

KeeperException.SessionMovedException

getLocalSessionCount

public long getLocalSessionCount()

Description copied from interface: SessionTracker

If this session tracker supports local sessions, return how many. otherwise returns 0;

Specified by:

getLocalSessionCount in interface SessionTracker