org.xmlBlaster.authentication
Class SessionInfo

java.lang.Object
  org.xmlBlaster.authentication.SessionInfo

All Implemented Interfaces:

I_Timeout, I_StorageSizeListener

public final class SessionInfo
extends java.lang.Object
implements I_Timeout, I_StorageSizeListener

SessionInfo stores all known session data about a client.

One client (SubjectInfo) may have multiple login sessions. Each session has its callback queue to deliver subscribed messages to the client.

We distinguish two different unique ID for each login session:

1. sessionId: This is the unique, secret session Id which is passed by the client on every method invocation to allow authentication
2. instanceId: This is a unique counter (with respect to one virtual machine JVM). It allows 'public' addressing of a session

Author:

Marcel Ruff

See Also:

The engine.qos.login requirement

Field Summary

private boolean	acceptWrongSenderAddress
private java.lang.Object	authorizationCache Can be optionally used by authorization frameworks
private boolean	blockClientSessionLogin
private ConnectQosServer	connectQos The current connection address from the protocol plugin
private ContextNode	contextNode
private ServerDispatchManager	dispatchManager manager for sending callback messages
private java.lang.Object	EXPIRY_TIMER_MONITOR Protects timerKey refresh
private Timeout	expiryTimer
private ServerScope	glob
private boolean	initialized
private static long	instanceCounter
private long	instanceId
private boolean	isShutdown
private long	lastNumEntries
private java.util.concurrent.locks.ReentrantLock	lock
private static java.util.logging.Logger	log
private JmxMBeanHandle	mbeanHandle My JMX registration
private java.lang.String	ME
private MsgErrorHandler	msgErrorHandler Do error recovery if message can't be delivered and we give it up
private QueueQueryPlugin	queueQueryPlugin this is used for administrative gets (queries on callback queue)
private ClientPropertiesInfo	remoteProperties Holding properties send by our remote client via the topic __sys__sessionProperties
private I_Session	securityCtx
private SessionInfoProtector	sessionInfoProtector
private SessionName	sessionName The cluster wide unique identifier of the session e.g.
private I_Queue	sessionQueue All MsgUnit which shall be delivered to the current session of the client are queued here to be ready to deliver.
private long	startupTime Incarnation time of this object instance in millis
private DispatchStatistic	statistic Statistic about send/received messages, can be null if there is a DispatchManager around
private SubjectInfo	subjectInfo
private Timestamp	timerKey
private boolean	transientWarn To prevent noisy warnings
private XmlBlasterException	transportConnectFail
private java.util.Map<java.lang.String,java.lang.Object>	userMap Map to store arbitrary info for this client, is cleaned up automatically when session dies Useful for example for plugins

Constructor Summary

SessionInfo(ServerScope glob, SessionName sessionName)
Create this instance when a client did a login.

Method Summary

ClientProperty	addRemoteProperty(java.lang.String key, java.lang.String value) Add a remote property.
void	changed(I_Storage storage, long numEntries, long numBytes, boolean isShutdown) We register for queue size changes and notify the subject queue if we are willing to accept messages again.
long	clearCallbackQueue()
void	clearLastCallbackException()
int	clearRemoteProperties(java.lang.String prefix) Clear remote properties.
java.lang.String	disconnectClientKeepSession()
void	finalize()
AddressServer	getAddressServer() The address information got from the protocol plugin.
java.lang.String	getAliveSinceDate()
java.lang.Object	getAuthorizationCache() Can be optionally used by the current authorization plugin.
MsgUnit[]	getCallbackQueueEntries(java.lang.String query)
long	getCbQueueBytes()
long	getCbQueueBytesCache()
long	getCbQueueMaxMsgs()
long	getCbQueueMaxMsgsCache()
long	getCbQueueNumMsgs()
long	getCbQueueNumMsgsCache()
java.lang.String	getConnectionState()
ConnectQosServer	getConnectQos()
ContextNode	getContextNode() The unique name of this session instance.
boolean	getDispatcherActive()
ServerDispatchManager	getDispatchManager()
DispatchStatistic	getDispatchStatistic()
java.lang.String	getId() Cluster wide unique identifier: /node/heron/client//, e.g.
long	getInstanceId() This is a unique instance id per JVM (it is the pubSessionId if the client hasn't specified its own).
java.lang.String	getLastCallbackException()
java.util.concurrent.locks.ReentrantLock	getLock() Access the synchronization object of this SessionInfo instance.
java.lang.String	getLoginDate()
java.lang.String	getLoginName() Access the unique login name of a client.
I_MsgErrorHandler	getMsgErrorHandler()
int	getNumCallbackExceptions()
long	getNumErase()
long	getNumGet()
long	getNumPublish()
long	getNumSubscribe()
long	getNumUnSubscribe()
long	getNumUpdate()
long	getNumUpdateOneway()
long	getPersistenceUniqueId() Gets the uniqueId for the persistence of this session.
long	getPingRoundTripDelay()
java.lang.String	getPollingSinceDate()
long	getPublicSessionId() This is the publicSessionId which is unique in the subject scope.
java.lang.String	getQos()
ClientPropertiesInfo	getRemoteProperties()
java.util.Map<java.lang.String,ClientProperty>	getRemotePropertiesMap()
ClientProperty[]	getRemotePropertyArr()
java.lang.String[]	getRootSubscriptions()
long	getRoundTripDelay()
java.lang.String	getSecretSessionId()
I_Session	getSecuritySession()
SessionInfoProtector	getSessionInfoProtector() The protector prevents direct access to this sessionInfo instance.
SessionName	getSessionName()
I_Queue	getSessionQueue() This queue holds all messages which where addressed to this session
java.lang.String	getSessionTimeoutExpireDate()
SubjectInfo	getSubjectInfo() Accessing the SubjectInfo object
java.lang.String[]	getSubscribedTopics()
java.lang.String	getSubscriptionDump()
java.lang.String[]	getSubscriptions()
XmlBlasterException	getTransportConnectFail() If the connection failed the reason is stored here, like this cleanup code knows what happened.
long	getUptime()
java.lang.String	getUsageUrl() JMX
java.lang.Object	getUserObject(java.lang.String key, java.lang.Object defaultValue) Map to store arbitrary info for this client, is cleaned up automatically when session dies Useful for example for plugins
java.util.Map<java.lang.String,java.lang.Object>	getUserObjectMap() Use carefully to not harm other plugins.
boolean	hasAddress(AddressBase addr) Is the given address the same as our?
boolean	hasCallback() Check if a callback was configured (if client has passed a callback address on connect).
boolean	hasUserObject(java.lang.String key)
(package private) void	init(SubjectInfo subjectInfo, I_Session securityCtx, ConnectQosServer connectQos)
boolean	isAcceptWrongSenderAddress() Configure server with '-xmlBlaster/acceptWrongSenderAddress true' or "-xmlBlaster/acceptWrongSenderAddress/joe true".
boolean	isAlive()
boolean	isBlockClientSessionLogin()
boolean	isCallbackConfigured()
(package private) boolean	isInitialized()
boolean	isSameSession(SessionInfo sessionInfo) Check cluster wide if the sessions are identical
boolean	isShutdown()
boolean	isStalled()
java.lang.String	killSession()
void	lostClientConnection() Can be called when client connection is lost (NOT the callback connection).
void	mergeRemoteProperties(java.util.Map map) Update properties send by our client.
java.lang.String[]	peekCallbackMessages(int numOfEntries)
java.lang.String[]	peekCallbackMessagesToFile(int numOfEntries, java.lang.String path) Peek messages from callback queue and dump them to a file, they are not removed.
java.lang.String	pingClientCallbackServer()
void	queueMessage(MsgQueueEntry entry) Put the given message entry into the queue
java.lang.String	reactivateDispatcherThread(boolean force)
void	refreshSession() Call this to reactivate the session expiry to full value
long	releaseLockAssertOne(java.lang.String errorInfo) Freeing sessionInfo lock with test/assert code.
void	removeExpiryTimer()
long	removeFromCallbackQueue(long numOfEntries)
void	setAcceptWrongSenderAddress(boolean acceptWrongSenderAddress)
void	setAuthorizationCache(java.lang.Object authorizationCache)
java.lang.String	setBlockClientSessionLogin(boolean blockClient)
void	setDispatcherActive(boolean dispatcherActive) Sets the DispachManager belonging to this session to active or inactive.
void	setPersistenceUniqueId(long persistenceId) Sets the uniqueId used to retrieve this session from the persistence
void	setRemoteProperties(java.util.Map map) Set properties send by our client.
void	setSecuritySession(I_Session ctx)
void	setSessionTimeout(long timeout) JMX Enforced by ConnectQosDataMBean interface.
void	setTransportConnectFail(XmlBlasterException transportConnectFail)
void	setUsageUrl(java.lang.String url)
java.lang.Object	setUserObject(java.lang.String key, java.lang.Object value) The key should use a prefix to not collide with other users / plugins.
void	shutdown()
java.lang.String	subscribe(java.lang.String url, java.lang.String qos)
void	timeout(java.lang.Object userData) We are notified when this session expires.
java.lang.String	toString()
java.lang.String	toXml() Dump state of this object into a XML ASCII string.
java.lang.String	toXml(java.lang.String extraOffset, java.util.Properties props) Dump state of this object into a XML ASCII string.
java.lang.String[]	unSubscribe(java.lang.String url, java.lang.String qos)
java.lang.String[]	unSubscribeByIndex(int index, java.lang.String qos)
void	updateConnectQos(ConnectQosServer newConnectQos)
java.lang.String	usage() JMX

Methods inherited from class java.lang.Object

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

Field Detail

ME

private java.lang.String ME

contextNode

private ContextNode contextNode

sessionName

private final SessionName sessionName

The cluster wide unique identifier of the session e.g. "/node/heron/client/joe/2"

subjectInfo

private SubjectInfo subjectInfo

securityCtx

private I_Session securityCtx

instanceCounter

private static long instanceCounter

instanceId

private long instanceId

connectQos

private ConnectQosServer connectQos

The current connection address from the protocol plugin

expiryTimer

private Timeout expiryTimer

timerKey

private Timestamp timerKey

glob

private ServerScope glob

log

private static java.util.logging.Logger log

msgErrorHandler

private MsgErrorHandler msgErrorHandler

Do error recovery if message can't be delivered and we give it up

dispatchManager

private ServerDispatchManager dispatchManager

manager for sending callback messages

statistic

private volatile DispatchStatistic statistic

Statistic about send/received messages, can be null if there is a DispatchManager around

isShutdown

private boolean isShutdown

EXPIRY_TIMER_MONITOR

private final java.lang.Object EXPIRY_TIMER_MONITOR

Protects timerKey refresh

sessionInfoProtector

private SessionInfoProtector sessionInfoProtector

mbeanHandle

private JmxMBeanHandle mbeanHandle

My JMX registration

transientWarn

private boolean transientWarn

To prevent noisy warnings

authorizationCache

private java.lang.Object authorizationCache

Can be optionally used by authorization frameworks

blockClientSessionLogin

private boolean blockClientSessionLogin

transportConnectFail

private XmlBlasterException transportConnectFail

remoteProperties

private ClientPropertiesInfo remoteProperties

Holding properties send by our remote client via the topic __sys__sessionProperties

acceptWrongSenderAddress

private boolean acceptWrongSenderAddress

sessionQueue

private I_Queue sessionQueue

All MsgUnit which shall be delivered to the current session of the client are queued here to be ready to deliver.

Node objects = MsgQueueEntry

lastNumEntries

private long lastNumEntries

startupTime

private long startupTime

Incarnation time of this object instance in millis

lock

private java.util.concurrent.locks.ReentrantLock lock

queueQueryPlugin

private volatile QueueQueryPlugin queueQueryPlugin

this is used for administrative gets (queries on callback queue)

initialized

private boolean initialized

userMap

private java.util.Map<java.lang.String,java.lang.Object> userMap

Map to store arbitrary info for this client, is cleaned up automatically when session dies Useful for example for plugins

Constructor Detail

SessionInfo

SessionInfo(ServerScope glob,
            SessionName sessionName)

Create this instance when a client did a login.

You need to call init()!

Method Detail

init

void init(SubjectInfo subjectInfo,
          I_Session securityCtx,
          ConnectQosServer connectQos)
    throws XmlBlasterException

Parameters:

subjectInfo - the SubjectInfo with the login informations for this client

Throws:

XmlBlasterException

isInitialized

final boolean isInitialized()

isAlive

public final boolean isAlive()

getContextNode

public final ContextNode getContextNode()

The unique name of this session instance.

Returns:

Never null, for example "/xmlBlaster/node/heron/client/joe/session/-2"

isAcceptWrongSenderAddress

public boolean isAcceptWrongSenderAddress()

Configure server with '-xmlBlaster/acceptWrongSenderAddress true' or "-xmlBlaster/acceptWrongSenderAddress/joe true". Is available using JMX.

Returns:

true: We accept wrong sender address in PublishQos.getSender() (not myself)

setAcceptWrongSenderAddress

public void setAcceptWrongSenderAddress(boolean acceptWrongSenderAddress)

Parameters:

acceptWrongSenderAddress - the acceptWrongSenderAddress to set

getAddressServer

public AddressServer getAddressServer()

The address information got from the protocol plugin.

Returns:

Can be null

getSessionInfoProtector

public final SessionInfoProtector getSessionInfoProtector()

The protector prevents direct access to this sessionInfo instance.

getInstanceId

public final long getInstanceId()

This is a unique instance id per JVM (it is the pubSessionId if the client hasn't specified its own).

It is NOT the secret sessionId and may be published with PtP messages without security danger

getLock

public java.util.concurrent.locks.ReentrantLock getLock()

Access the synchronization object of this SessionInfo instance.

releaseLockAssertOne

public long releaseLockAssertOne(java.lang.String errorInfo)

Freeing sessionInfo lock with test/assert code.

Parameters:

errorInfo -

Returns:

number of holds released

hasCallback

public final boolean hasCallback()

Check if a callback was configured (if client has passed a callback address on connect).

getMsgErrorHandler

public final I_MsgErrorHandler getMsgErrorHandler()

getPublicSessionId

public final long getPublicSessionId()

This is the publicSessionId which is unique in the subject scope.

It is NOT the secret sessionId and may be published with PtP messages without security danger

Returns:

The same as getInstanceId()

See Also:

getInstanceId()

finalize

public void finalize()

Overrides:

finalize in class java.lang.Object

isShutdown

public boolean isShutdown()

removeExpiryTimer

public void removeExpiryTimer()

shutdown

public void shutdown()

getDispatchManager

public final ServerDispatchManager getDispatchManager()

Returns:

null if no callback is configured, can change to null on reconfiguration

getDispatchStatistic

public final DispatchStatistic getDispatchStatistic()

Returns:

never null but empty if no callback is configured

refreshSession

public final void refreshSession()
                          throws XmlBlasterException

Call this to reactivate the session expiry to full value

Throws:

XmlBlasterException

timeout

public final void timeout(java.lang.Object userData)

We are notified when this session expires.

Specified by:

timeout in interface I_Timeout

Parameters:

userData - You get bounced back your userData which you passed with Timeout.addTimeoutListener()

hasAddress

public final boolean hasAddress(AddressBase addr)

Is the given address the same as our?

queueMessage

public final void queueMessage(MsgQueueEntry entry)
                        throws XmlBlasterException

Put the given message entry into the queue

Throws:

XmlBlasterException

getConnectQos

public final ConnectQosServer getConnectQos()

updateConnectQos

public final void updateConnectQos(ConnectQosServer newConnectQos)
                            throws XmlBlasterException

Throws:

XmlBlasterException

getLoginName

public final java.lang.String getLoginName()

Access the unique login name of a client.

Returns:

loginName

getSubjectInfo

public final SubjectInfo getSubjectInfo()

Accessing the SubjectInfo object

Returns:

SubjectInfo

getSecretSessionId

public java.lang.String getSecretSessionId()

Returns:

The secret sessionId of this login session

getSecuritySession

public I_Session getSecuritySession()

setSecuritySession

public void setSecuritySession(I_Session ctx)

getSessionQueue

public I_Queue getSessionQueue()

This queue holds all messages which where addressed to this session

Returns:

null if no callback was configured

getId

public final java.lang.String getId()

Cluster wide unique identifier: /node/heron/client//, e.g. for logging only

Returns:

e.g. "/node/heron/client/joe/2

getSessionName

public final SessionName getSessionName()

isSameSession

public boolean isSameSession(SessionInfo sessionInfo)

Check cluster wide if the sessions are identical

changed

public void changed(I_Storage storage,
                    long numEntries,
                    long numBytes,
                    boolean isShutdown)

We register for queue size changes and notify the subject queue if we are willing to accept messages again. Enforced by I_StorageSizeListener

Specified by:

changed in interface I_StorageSizeListener

Parameters:

storage - The queue which fires the change event

numEntries - the number of entries in the queue after the change has taken place

numBytes - number of bytes in the queue after the change has taken change.

isShutdown - Is set to true if queue.shutdown() was executed

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

getId()

toXml

public final java.lang.String toXml()

Dump state of this object into a XML ASCII string.

Returns:

internal state of SessionInfo as a XML ASCII string

toXml

public final java.lang.String toXml(java.lang.String extraOffset,
                                    java.util.Properties props)

Dump state of this object into a XML ASCII string.

Parameters:

extraOffset - indenting of tags for nice output

Returns:

internal state of SessionInfo as a XML ASCII string

getQos

public java.lang.String getQos()

isCallbackConfigured

public final boolean isCallbackConfigured()

getUptime

public final long getUptime()

getConnectionState

public final java.lang.String getConnectionState()

getLoginDate

public final java.lang.String getLoginDate()

getSessionTimeoutExpireDate

public final java.lang.String getSessionTimeoutExpireDate()

getAliveSinceDate

public final java.lang.String getAliveSinceDate()

getPollingSinceDate

public final java.lang.String getPollingSinceDate()

getLastCallbackException

public final java.lang.String getLastCallbackException()

clearLastCallbackException

public final void clearLastCallbackException()

getNumCallbackExceptions

public final int getNumCallbackExceptions()

getNumPublish

public final long getNumPublish()

getNumSubscribe

public final long getNumSubscribe()

getNumUnSubscribe

public final long getNumUnSubscribe()

getNumGet

public final long getNumGet()

getNumErase

public final long getNumErase()

getNumUpdateOneway

public final long getNumUpdateOneway()

getNumUpdate

public final long getNumUpdate()

getCbQueueNumMsgs

public final long getCbQueueNumMsgs()

getCbQueueBytes

public final long getCbQueueBytes()

getCbQueueBytesCache

public final long getCbQueueBytesCache()

getCbQueueNumMsgsCache

public final long getCbQueueNumMsgsCache()

getCbQueueMaxMsgs

public final long getCbQueueMaxMsgs()

getCbQueueMaxMsgsCache

public final long getCbQueueMaxMsgsCache()

pingClientCallbackServer

public java.lang.String pingClientCallbackServer()

getPingRoundTripDelay

public long getPingRoundTripDelay()

getRoundTripDelay

public long getRoundTripDelay()

getSubscribedTopics

public final java.lang.String[] getSubscribedTopics()

subscribe

public final java.lang.String subscribe(java.lang.String url,
                                        java.lang.String qos)
                                 throws XmlBlasterException

Throws:

XmlBlasterException

unSubscribeByIndex

public java.lang.String[] unSubscribeByIndex(int index,
                                             java.lang.String qos)
                                      throws XmlBlasterException

Throws:

XmlBlasterException

unSubscribe

public final java.lang.String[] unSubscribe(java.lang.String url,
                                            java.lang.String qos)
                                     throws XmlBlasterException

Throws:

XmlBlasterException

getSubscriptions

public final java.lang.String[] getSubscriptions()
                                          throws XmlBlasterException

Throws:

XmlBlasterException

getRootSubscriptions

public final java.lang.String[] getRootSubscriptions()
                                              throws XmlBlasterException

Throws:

XmlBlasterException

getSubscriptionDump

public final java.lang.String getSubscriptionDump()
                                           throws XmlBlasterException

Throws:

XmlBlasterException

killSession

public final java.lang.String killSession()
                                   throws XmlBlasterException

Throws:

XmlBlasterException

getPersistenceUniqueId

public final long getPersistenceUniqueId()

Gets the uniqueId for the persistence of this session.

Returns:

the uniqueId used to identify this session as an entry in the queue where it is stored (for persistent subscriptions). If the session is not persistent it returns -1L.

setPersistenceUniqueId

public final void setPersistenceUniqueId(long persistenceId)

Sets the uniqueId used to retrieve this session from the persistence

Parameters:

persistenceId -

setDispatcherActive

public void setDispatcherActive(boolean dispatcherActive)

Sets the DispachManager belonging to this session to active or inactive. It is initially active. Setting it to false temporarly inhibits dispatch of messages which are in the callback queue. Setting it to true starts the dispatch again.

Parameters:

dispatchActive -

getDispatcherActive

public boolean getDispatcherActive()

reactivateDispatcherThread

public java.lang.String reactivateDispatcherThread(boolean force)

peekCallbackMessages

public java.lang.String[] peekCallbackMessages(int numOfEntries)
                                        throws XmlBlasterException

Throws:

XmlBlasterException

peekCallbackMessagesToFile

public java.lang.String[] peekCallbackMessagesToFile(int numOfEntries,
                                                     java.lang.String path)
                                              throws java.lang.Exception

Peek messages from callback queue and dump them to a file, they are not removed.

Parameters:

numOfEntries - The number of messages to peek, taken from the front

path - The path to dump the messages to, it is automatically created if missing.

Returns:

The file names of the dumped messages

Throws:

java.lang.Exception

clearCallbackQueue

public long clearCallbackQueue()

removeFromCallbackQueue

public long removeFromCallbackQueue(long numOfEntries)
                             throws XmlBlasterException

Throws:

XmlBlasterException

getCallbackQueueEntries

public MsgUnit[] getCallbackQueueEntries(java.lang.String query)
                                  throws XmlBlasterException

Throws:

XmlBlasterException

setSessionTimeout

public final void setSessionTimeout(long timeout)

JMX Enforced by ConnectQosDataMBean interface.

usage

public java.lang.String usage()

JMX

getUsageUrl

public java.lang.String getUsageUrl()

JMX

setUsageUrl

public void setUsageUrl(java.lang.String url)

getRemoteProperties

public ClientPropertiesInfo getRemoteProperties()

Returns:

Returns the remoteProperties or null

getRemotePropertyArr

public ClientProperty[] getRemotePropertyArr()

Returns:

never null

getRemotePropertiesMap

public java.util.Map<java.lang.String,ClientProperty> getRemotePropertiesMap()

setRemoteProperties

public void setRemoteProperties(java.util.Map map)

Set properties send by our client.

Parameters:

remoteProperties - The remoteProperties to set, pass null to reset. The key is of type String and the value of type ClientProperty

clearRemoteProperties

public int clearRemoteProperties(java.lang.String prefix)

Clear remote properties.

Parameters:

prefix - if not null only keys starting with are removed

Returns:

number of removed entries

mergeRemoteProperties

public void mergeRemoteProperties(java.util.Map map)

Update properties send by our client.

Parameters:

remoteProperties - The remoteProperties to set, if a property exists its value is overwritten, passing null does nothing The key is of type String and the value of type ClientProperty

addRemoteProperty

public ClientProperty addRemoteProperty(java.lang.String key,
                                        java.lang.String value)

Add a remote property. Usually this is done by a publish of a client, but for testing reasons we can to it here manually. If the key exists, its value is overwritten

Parameters:

key - The unique key (no multimap)

value - The value, it is assumed to be of type "String"

Returns:

The old ClientProperty if existed, else null

See Also:

The admin.events requirement

isStalled

public boolean isStalled()

lostClientConnection

public void lostClientConnection()

Can be called when client connection is lost (NOT the callback connection). Currently only detected by the SOCKET protocol plugin. Others can only detect lost clients with their callback protocol pings

getTransportConnectFail

public XmlBlasterException getTransportConnectFail()

If the connection failed the reason is stored here, like this cleanup code knows what happened.

Returns:

the transportConnectFail

setTransportConnectFail

public void setTransportConnectFail(XmlBlasterException transportConnectFail)

Parameters:

transportConnectFail - the transportConnectFail to set

getAuthorizationCache

public java.lang.Object getAuthorizationCache()

Can be optionally used by the current authorization plugin.

setAuthorizationCache

public void setAuthorizationCache(java.lang.Object authorizationCache)

isBlockClientSessionLogin

public boolean isBlockClientSessionLogin()

setBlockClientSessionLogin

public java.lang.String setBlockClientSessionLogin(boolean blockClient)

disconnectClientKeepSession

public java.lang.String disconnectClientKeepSession()

getUserObject

public java.lang.Object getUserObject(java.lang.String key,
                                      java.lang.Object defaultValue)

Map to store arbitrary info for this client, is cleaned up automatically when session dies Useful for example for plugins

hasUserObject

public boolean hasUserObject(java.lang.String key)

setUserObject

public java.lang.Object setUserObject(java.lang.String key,
                                      java.lang.Object value)

The key should use a prefix to not collide with other users / plugins.

Parameters:

key -

value -

Returns:

the previous or null

getUserObjectMap

public java.util.Map<java.lang.String,java.lang.Object> getUserObjectMap()

Use carefully to not harm other plugins.

Returns:

of type Collections.synchronizedMap(new HashMap()