org.apache.zookeeper.server
Interface SessionTracker

All Known Implementing Classes:

LearnerSessionTracker, SessionTrackerImpl

public interface SessionTracker

This is the basic interface that ZooKeeperServer uses to track sessions. The standalone and leader ZooKeeperServer use the same SessionTracker. The FollowerZooKeeperServer uses a SessionTracker which is basically a simple shell to track information to be forwarded to the leader.

Nested Class Summary

static interface	SessionTracker.Session
static interface	SessionTracker.SessionExpirer

Method Summary

void	addSession(long id, int to)
void	checkSession(long sessionId, Object owner)
long	createSession(int sessionTimeout)
void	dumpSessions(PrintWriter pwriter) Text dump of session information, suitable for debugging.
void	removeSession(long sessionId)
void	setOwner(long id, Object owner)
void	setSessionClosing(long sessionId) Mark that the session is in the process of closing.
void	shutdown()
boolean	touchSession(long sessionId, int sessionTimeout)

Method Detail

createSession

long createSession(int sessionTimeout)

addSession

void addSession(long id,
                int to)

touchSession

boolean touchSession(long sessionId,
                     int sessionTimeout)

Parameters:

sessionId -

sessionTimeout -

Returns:

false if session is no longer active

setSessionClosing

void setSessionClosing(long sessionId)

Mark that the session is in the process of closing.

Parameters:

sessionId -

shutdown

void shutdown()

removeSession

void removeSession(long sessionId)

Parameters:

sessionId -

checkSession

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

Throws:

KeeperException.SessionExpiredException

KeeperException.SessionMovedException

setOwner

void setOwner(long id,
              Object owner)
              throws KeeperException.SessionExpiredException

Throws:

KeeperException.SessionExpiredException

dumpSessions

void dumpSessions(PrintWriter pwriter)

Text dump of session information, suitable for debugging.

Parameters:

pwriter - the output writer