DeltaManager (Apache Tomcat 8.0.15 API Documentation)

java.lang.Object
- org.apache.catalina.util.LifecycleBase
- - org.apache.catalina.util.LifecycleMBeanBase
  - - org.apache.catalina.session.ManagerBase
    - - org.apache.catalina.ha.session.ClusterManagerBase
      - org.apache.catalina.ha.session.DeltaManager

All Implemented Interfaces:

PropertyChangeListener, EventListener, MBeanRegistration, ClusterManager, JmxEnabled, Lifecycle, Manager
```
public class DeltaManager
extends ClusterManagerBase
```
The DeltaManager manages replicated sessions by only replicating the deltas in data. For applications written to handle this, the DeltaManager is the optimal way of replicating data. This code is almost identical to StandardManager with a difference in how it persists sessions and some modifications to it. IMPLEMENTATION NOTE : Correct behavior of session storing and reloading depends upon external calls to the start() and stop() methods of this class at the correct times.

Author:

Craig R. McClanahan, Peter Rossbach

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.catalina.session.ManagerBase
  ManagerBase.SessionTiming

Field Summary

Fields
Modifier and Type	Field and Description
`Log`	`log`
`protected static String`	`managerName` The descriptive name of this Manager implementation (for logging).
`protected String`	`name`
`protected static StringManager`	`sm` The string manager for this package.

Fields inherited from class org.apache.catalina.ha.session.ClusterManagerBase
cluster

Fields inherited from class org.apache.catalina.session.ManagerBase
distributable, duplicates, expiredSessions, maxActive, maxActiveSessions, maxInactiveInterval, processExpiresFrequency, processingTime, rejectedSessions, secureRandomAlgorithm, secureRandomClass, secureRandomProvider, SESSION_ID_LENGTH_UNSET, sessionCounter, sessionCreationTiming, sessionExpirationTiming, sessionIdGenerator, sessionIdGeneratorClass, sessionIdLength, sessionMaxAliveTime, sessions, support, TIMING_STATS_CACHE_SIZE

Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase
mserver

Fields inherited from interface org.apache.catalina.Lifecycle
AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT

Constructor Summary

Constructors
Constructor and Description

DeltaManager()

Constructors
Constructor and Description
`DeltaManager()`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`changeSessionId(Session session)` Change the session ID of the current session to a new randomly generated session ID.
`protected void`	`changeSessionId(Session session, boolean notify)`
`void`	`changeSessionId(Session session, String newId)` Change the session ID of the current session to a specified session ID.
`protected void`	`changeSessionId(Session session, String newId, boolean notify)`
`protected boolean`	`checkSenderDomain(SessionMessage msg, Member sender)` Test that sender and local domain is the same
`ClusterManager`	`cloneFromTemplate()`
`Session`	`createEmptySession()` Create DeltaSession
`Session`	`createSession(String sessionId)` Construct and return a new session object, based on the default settings specified by this Manager's properties.
`Session`	`createSession(String sessionId, boolean distribute)` create new session with check maxActiveSessions and send session creation to other cluster nodes.
`protected DeltaRequest`	`deserializeDeltaRequest(DeltaSession session, byte[] data)` Load Deltarequest from external node Load the Class at container classloader
`protected String`	`deserializeSessionId(byte[] data)` Load sessionID
`protected void`	`deserializeSessions(byte[] data)` Load sessions from other cluster node.
`void`	`expireAllLocalSessions()` Expire all find sessions.
`protected Member`	`findSessionMasterMember()` Find the master of the session state
`void`	`getAllClusterSessions()` get from first session master the backup from all clustered sessions
`int`	`getCounterNoStateTransfered()`
`long`	`getCounterReceive_EVT_ALL_SESSION_DATA()`
`long`	`getCounterReceive_EVT_ALL_SESSION_NOCONTEXTMANAGER()`
`int`	`getCounterReceive_EVT_ALL_SESSION_TRANSFERCOMPLETE()`
`long`	`getCounterReceive_EVT_CHANGE_SESSION_ID()`
`long`	`getCounterReceive_EVT_GET_ALL_SESSIONS()`
`long`	`getCounterReceive_EVT_SESSION_ACCESSED()`
`long`	`getCounterReceive_EVT_SESSION_CREATED()`
`long`	`getCounterReceive_EVT_SESSION_DELTA()`
`long`	`getCounterReceive_EVT_SESSION_EXPIRED()`
`long`	`getCounterSend_EVT_ALL_SESSION_DATA()`
`int`	`getCounterSend_EVT_ALL_SESSION_TRANSFERCOMPLETE()`
`long`	`getCounterSend_EVT_CHANGE_SESSION_ID()`
`long`	`getCounterSend_EVT_GET_ALL_SESSIONS()`
`long`	`getCounterSend_EVT_SESSION_ACCESSED()`
`long`	`getCounterSend_EVT_SESSION_CREATED()`
`long`	`getCounterSend_EVT_SESSION_DELTA()`
`long`	`getCounterSend_EVT_SESSION_EXPIRED()`
`String[]`	`getInvalidatedSessions()` When the manager expires session not tied to a request.
`String`	`getName()` Return the descriptive short name of this Manager implementation.
`protected DeltaSession`	`getNewDeltaSession()` Get new session class to be used in the doLoad() method.
`long`	`getProcessingTime()`
`int`	`getReceivedQueueSize()`
`int`	`getSendAllSessionsSize()`
`int`	`getSendAllSessionsWaitTime()`
`long`	`getSessionReplaceCounter()`
`boolean`	`getStateTransfered()` is session state transfered complete?
`int`	`getStateTransferTimeout()`
`protected void`	`handleALL_SESSION_DATA(SessionMessage msg, Member sender)` handle receive sessions from other not ( restart )
`protected void`	`handleALL_SESSION_NOCONTEXTMANAGER(SessionMessage msg, Member sender)` handle receive no context manager.
`protected void`	`handleALL_SESSION_TRANSFERCOMPLETE(SessionMessage msg, Member sender)` handle receive session state is complete transfered
`protected void`	`handleCHANGE_SESSION_ID(SessionMessage msg, Member sender)` handle receive change sessionID at other node
`protected void`	`handleGET_ALL_SESSIONS(SessionMessage msg, Member sender)` handle receive that other node want all sessions ( restart ) a) send all sessions with one message b) send session at blocks After sending send state is complete transfered
`protected void`	`handleSESSION_ACCESSED(SessionMessage msg, Member sender)` handle receive session is access at other node ( primary session is now false)
`protected void`	`handleSESSION_CREATED(SessionMessage msg, Member sender)` handle receive new session is created at other node (create backup - primary false)
`protected void`	`handleSESSION_DELTA(SessionMessage msg, Member sender)` handle receive session delta
`protected void`	`handleSESSION_EXPIRED(SessionMessage msg, Member sender)` handle receive session is expire at other node ( expire session also here)
`boolean`	`isExpireSessionsOnShutdown()`
`boolean`	`isNoContextManagerReceived()`
`boolean`	`isNotifyContainerListenersOnReplication()`
`boolean`	`isNotifySessionListenersOnReplication()`
`boolean`	`isSendAllSessions()`
`boolean`	`isStateTimestampDrop()`
`void`	`messageDataReceived(ClusterMessage cmsg)` A message was received from another node, this is the callback method to implement if you are interested in receiving replication messages.
`protected void`	`messageReceived(SessionMessage msg, Member sender)` This method is called by the received thread when a SessionMessage has been received from one of the other nodes in the cluster.
`ClusterMessage`	`requestCompleted(String sessionId)` When the request has been completed, the replication valve will notify the manager, and the manager will decide whether any replication is needed or not.
`ClusterMessage`	`requestCompleted(String sessionId, boolean expires)` When the request has been completed, the replication valve will notify the manager, and the manager will decide whether any replication is needed or not.
`void`	`resetStatistics()` Reset manager statistics
`protected void`	`send(SessionMessage msg)` Send messages to other backup member (domain or all)
`protected void`	`sendChangeSessionId(String newSessionID, String orgSessionID)`
`protected void`	`sendCreateSession(String sessionId, DeltaSession session)` Send create session evt to all backup node
`protected void`	`sendSessions(Member sender, Session[] currentSessions, long sendTimestamp)` send a block of session to sender
`protected byte[]`	`serializeDeltaRequest(DeltaSession session, DeltaRequest deltaRequest)` serialize DeltaRequest
`protected byte[]`	`serializeSessionId(String sessionId)` serialize sessionID
`protected byte[]`	`serializeSessions(Session[] currentSessions)` Save any currently active sessions in the appropriate persistence mechanism, if any.
`protected void`	`sessionExpired(String id)` send session expired to other cluster nodes
`void`	`setExpireSessionsOnShutdown(boolean expireSessionsOnShutdown)`
`void`	`setName(String name)` Set the name of the manager, at host /context name and at engine hostname+/context
`void`	`setNoContextManagerReceived(boolean noContextManagerReceived)`
`void`	`setNotifyContainerListenersOnReplication(boolean notifyContainerListenersOnReplication)`
`void`	`setNotifySessionListenersOnReplication(boolean notifyListenersCreateSessionOnReplication)`
`void`	`setSendAllSessions(boolean sendAllSessions)`
`void`	`setSendAllSessionsSize(int sendAllSessionsSize)`
`void`	`setSendAllSessionsWaitTime(int sendAllSessionsWaitTime)`
`void`	`setStateTimestampDrop(boolean isTimestampDrop)`
`void`	`setStateTransfered(boolean stateTransfered)` set that state ist complete transfered
`void`	`setStateTransferTimeout(int timeoutAllSession)`
`protected void`	`startInternal()` Start this component and implement the requirements of `LifecycleBase.startInternal()`.
`protected void`	`stopInternal()` Stop this component and implement the requirements of `LifecycleBase.stopInternal()`.
`protected void`	`waitForSendAllSessions(long beforeSendTime)` Wait that cluster session state is transfer or timeout after 60 Sec With stateTransferTimeout == -1 wait that backup is transfered (forever mode)

Methods inherited from class org.apache.catalina.ha.session.ClusterManagerBase
clone, getClassLoaders, getClassLoaders, getCluster, getReplicationStream, getReplicationStream, getSessionAttributeFilter, isNotifyListenersOnReplication, load, registerSessionAtReplicationValve, setCluster, setNotifyListenersOnReplication, setSessionAttributeFilter, unload, willAttributeDistribute

Methods inherited from class org.apache.catalina.session.ManagerBase
add, addPropertyChangeListener, backgroundProcess, changeSessionId, expireSession, findSession, findSessions, generateSessionId, getActiveSessions, getClassName, getContainer, getContext, getCreationTime, getCreationTimestamp, getDistributable, getDomainInternal, getDuplicates, getEngine, getExpiredSessions, getJvmRoute, getLastAccessedTime, getLastAccessedTimestamp, getMaxActive, getMaxActiveSessions, getMaxInactiveInterval, getNewSession, getObjectNameKeyProperties, getProcessExpiresFrequency, getRejectedSessions, getSecureRandomAlgorithm, getSecureRandomClass, getSecureRandomProvider, getSession, getSessionAttribute, getSessionAverageAliveTime, getSessionCounter, getSessionCreateRate, getSessionExpireRate, getSessionIdGenerator, getSessionIdLength, getSessionMaxAliveTime, getThisAccessedTime, getThisAccessedTimestamp, initInternal, listSessionIds, processExpires, propertyChange, remove, remove, removePropertyChangeListener, setContainer, setContext, setDistributable, setDuplicates, setExpiredSessions, setMaxActive, setMaxActiveSessions, setMaxInactiveInterval, setProcessExpiresFrequency, setProcessingTime, setSecureRandomAlgorithm, setSecureRandomClass, setSecureRandomProvider, setSessionCounter, setSessionIdGenerator, setSessionIdLength, setSessionMaxAliveTime, toString, updateSessionMaxAliveTime

Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase
destroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister

Methods inherited from class org.apache.catalina.util.LifecycleBase
addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - log
```
public final Log log
```
  - sm
```
protected static final StringManager sm
```
    The string manager for this package.
  - managerName
```
protected static final String managerName
```
    The descriptive name of this Manager implementation (for logging).
    
    See Also:
    Constant Field Values
  - name
```
protected String name
```
- Constructor Detail
  - DeltaManager
```
public DeltaManager()
```
- Method Detail
  - setName
```
public void setName(String name)
```
    Description copied from interface: ClusterManager
    
    Set the name of the manager, at host /context name and at engine hostname+/context
  - getName
```
public String getName()
```
    Return the descriptive short name of this Manager implementation.
    
    Specified by:
    
    getName in interface ClusterManager
    
    Overrides:
    
    getName in class ManagerBase
    
    Returns:
    String
  - getCounterSend_EVT_GET_ALL_SESSIONS
```
public long getCounterSend_EVT_GET_ALL_SESSIONS()
```
    Returns:
    Returns the counterSend_EVT_GET_ALL_SESSIONS.
  - getCounterSend_EVT_SESSION_ACCESSED
```
public long getCounterSend_EVT_SESSION_ACCESSED()
```
    Returns:
    Returns the counterSend_EVT_SESSION_ACCESSED.
  - getCounterSend_EVT_SESSION_CREATED
```
public long getCounterSend_EVT_SESSION_CREATED()
```
    Returns:
    Returns the counterSend_EVT_SESSION_CREATED.
  - getCounterSend_EVT_SESSION_DELTA
```
public long getCounterSend_EVT_SESSION_DELTA()
```
    Returns:
    Returns the counterSend_EVT_SESSION_DELTA.
  - getCounterSend_EVT_SESSION_EXPIRED
```
public long getCounterSend_EVT_SESSION_EXPIRED()
```
    Returns:
    Returns the counterSend_EVT_SESSION_EXPIRED.
  - getCounterSend_EVT_ALL_SESSION_DATA
```
public long getCounterSend_EVT_ALL_SESSION_DATA()
```
    Returns:
    Returns the counterSend_EVT_ALL_SESSION_DATA.
  - getCounterSend_EVT_ALL_SESSION_TRANSFERCOMPLETE
```
public int getCounterSend_EVT_ALL_SESSION_TRANSFERCOMPLETE()
```
    Returns:
    Returns the counterSend_EVT_ALL_SESSION_TRANSFERCOMPLETE.
  - getCounterSend_EVT_CHANGE_SESSION_ID
```
public long getCounterSend_EVT_CHANGE_SESSION_ID()
```
    Returns:
    Returns the counterSend_EVT_CHANGE_SESSION_ID.
  - getCounterReceive_EVT_ALL_SESSION_DATA
```
public long getCounterReceive_EVT_ALL_SESSION_DATA()
```
    Returns:
    Returns the counterReceive_EVT_ALL_SESSION_DATA.
  - getCounterReceive_EVT_GET_ALL_SESSIONS
```
public long getCounterReceive_EVT_GET_ALL_SESSIONS()
```
    Returns:
    Returns the counterReceive_EVT_GET_ALL_SESSIONS.
  - getCounterReceive_EVT_SESSION_ACCESSED
```
public long getCounterReceive_EVT_SESSION_ACCESSED()
```
    Returns:
    Returns the counterReceive_EVT_SESSION_ACCESSED.
  - getCounterReceive_EVT_SESSION_CREATED
```
public long getCounterReceive_EVT_SESSION_CREATED()
```
    Returns:
    Returns the counterReceive_EVT_SESSION_CREATED.
  - getCounterReceive_EVT_SESSION_DELTA
```
public long getCounterReceive_EVT_SESSION_DELTA()
```
    Returns:
    Returns the counterReceive_EVT_SESSION_DELTA.
  - getCounterReceive_EVT_SESSION_EXPIRED
```
public long getCounterReceive_EVT_SESSION_EXPIRED()
```
    Returns:
    Returns the counterReceive_EVT_SESSION_EXPIRED.
  - getCounterReceive_EVT_ALL_SESSION_TRANSFERCOMPLETE
```
public int getCounterReceive_EVT_ALL_SESSION_TRANSFERCOMPLETE()
```
    Returns:
    Returns the counterReceive_EVT_ALL_SESSION_TRANSFERCOMPLETE.
  - getCounterReceive_EVT_CHANGE_SESSION_ID
```
public long getCounterReceive_EVT_CHANGE_SESSION_ID()
```
    Returns:
    Returns the counterReceive_EVT_CHANGE_SESSION_ID.
  - getCounterReceive_EVT_ALL_SESSION_NOCONTEXTMANAGER
```
public long getCounterReceive_EVT_ALL_SESSION_NOCONTEXTMANAGER()
```
    Returns:
    Returns the counterReceive_EVT_ALL_SESSION_NOCONTEXTMANAGER.
  - getProcessingTime
```
public long getProcessingTime()
```
    Overrides:
    
    getProcessingTime in class ManagerBase
    
    Returns:
    Returns the processingTime.
  - getSessionReplaceCounter
```
public long getSessionReplaceCounter()
```
    Returns:
    Returns the sessionReplaceCounter.
  - getCounterNoStateTransfered
```
public int getCounterNoStateTransfered()
```
    Returns:
    Returns the counterNoStateTransfered.
  - getReceivedQueueSize
```
public int getReceivedQueueSize()
```
  - getStateTransferTimeout
```
public int getStateTransferTimeout()
```
    Returns:
    Returns the stateTransferTimeout.
  - setStateTransferTimeout
```
public void setStateTransferTimeout(int timeoutAllSession)
```
    Parameters:
    timeoutAllSession - The timeout
  - getStateTransfered
```
public boolean getStateTransfered()
```
    is session state transfered complete?
  - setStateTransfered
```
public void setStateTransfered(boolean stateTransfered)
```
    set that state ist complete transfered
    
    Parameters:
    stateTransfered -
  - isNoContextManagerReceived
```
public boolean isNoContextManagerReceived()
```
  - setNoContextManagerReceived
```
public void setNoContextManagerReceived(boolean noContextManagerReceived)
```
  - getSendAllSessionsWaitTime
```
public int getSendAllSessionsWaitTime()
```
    Returns:
    Returns the sendAllSessionsWaitTime in msec
  - setSendAllSessionsWaitTime
```
public void setSendAllSessionsWaitTime(int sendAllSessionsWaitTime)
```
    Parameters:
    sendAllSessionsWaitTime - The sendAllSessionsWaitTime to set at msec.
  - isStateTimestampDrop
```
public boolean isStateTimestampDrop()
```
    Returns:
    Returns the stateTimestampDrop.
  - setStateTimestampDrop
```
public void setStateTimestampDrop(boolean isTimestampDrop)
```
    Parameters:
    isTimestampDrop - The new flag value
  - isSendAllSessions
```
public boolean isSendAllSessions()
```
    Returns:
    Returns the sendAllSessions.
  - setSendAllSessions
```
public void setSendAllSessions(boolean sendAllSessions)
```
    Parameters:
    sendAllSessions - The sendAllSessions to set.
  - getSendAllSessionsSize
```
public int getSendAllSessionsSize()
```
    Returns:
    Returns the sendAllSessionsSize.
  - setSendAllSessionsSize
```
public void setSendAllSessionsSize(int sendAllSessionsSize)
```
    Parameters:
    sendAllSessionsSize - The sendAllSessionsSize to set.
  - isNotifySessionListenersOnReplication
```
public boolean isNotifySessionListenersOnReplication()
```
    Returns:
    Returns the notifySessionListenersOnReplication.
  - setNotifySessionListenersOnReplication
```
public void setNotifySessionListenersOnReplication(boolean notifyListenersCreateSessionOnReplication)
```
    Parameters:
    notifyListenersCreateSessionOnReplication - The notifySessionListenersOnReplication to set.
  - isExpireSessionsOnShutdown
```
public boolean isExpireSessionsOnShutdown()
```
  - setExpireSessionsOnShutdown
```
public void setExpireSessionsOnShutdown(boolean expireSessionsOnShutdown)
```
  - isNotifyContainerListenersOnReplication
```
public boolean isNotifyContainerListenersOnReplication()
```
  - setNotifyContainerListenersOnReplication
```
public void setNotifyContainerListenersOnReplication(boolean notifyContainerListenersOnReplication)
```
  - createSession
```
public Session createSession(String sessionId)
```
    Construct and return a new session object, based on the default settings specified by this Manager's properties. The session id will be assigned by this method, and available via the getId() method of the returned session. If a new session cannot be created for any reason, return null.
    
    Specified by:
    
    createSession in interface Manager
    
    Overrides:
    
    createSession in class ManagerBase
    
    Parameters:
    sessionId - The session id which should be used to create the new session; if null, a new session id will be generated
    
    Throws:
    
    IllegalStateException - if a new session cannot be instantiated for any reason Construct and return a new session object, based on the default settings specified by this Manager's properties. The session id will be assigned by this method, and available via the getId() method of the returned session. If a new session cannot be created for any reason, return null.
    
    IllegalStateException - if a new session cannot be instantiated for any reason
  - createSession
```
public Session createSession(String sessionId,
                    boolean distribute)
```
    create new session with check maxActiveSessions and send session creation to other cluster nodes.
    
    Parameters:
    distribute -
    
    Returns:
    The session
  - sendCreateSession
```
protected void sendCreateSession(String sessionId,
                     DeltaSession session)
```
    Send create session evt to all backup node
    
    Parameters:
    sessionId -
    session -
  - send
```
protected void send(SessionMessage msg)
```
    Send messages to other backup member (domain or all)
    
    Parameters:
    msg - Session message
  - createEmptySession
```
public Session createEmptySession()
```
    Create DeltaSession
    
    Specified by:
    
    createEmptySession in interface Manager
    
    Overrides:
    
    createEmptySession in class ManagerBase
    
    See Also:
    Manager.createEmptySession()
  - getNewDeltaSession
```
protected DeltaSession getNewDeltaSession()
```
    Get new session class to be used in the doLoad() method.
  - changeSessionId
```
public void changeSessionId(Session session)
```
    Change the session ID of the current session to a new randomly generated session ID.
    
    Specified by:
    
    changeSessionId in interface Manager
    
    Overrides:
    
    changeSessionId in class ManagerBase
    
    Parameters:
    session - The session to change the session ID for
  - changeSessionId
```
public void changeSessionId(Session session,
                   String newId)
```
    Change the session ID of the current session to a specified session ID.
    
    Specified by:
    
    changeSessionId in interface Manager
    
    Overrides:
    
    changeSessionId in class ManagerBase
    
    Parameters:
    session - The session to change the session ID for
    newId - new session ID
  - changeSessionId
```
protected void changeSessionId(Session session,
                   boolean notify)
```
  - changeSessionId
```
protected void changeSessionId(Session session,
                   String newId,
                   boolean notify)
```
  - sendChangeSessionId
```
protected void sendChangeSessionId(String newSessionID,
                       String orgSessionID)
```
  - serializeSessionId
```
protected byte[] serializeSessionId(String sessionId)
                             throws IOException
```
    serialize sessionID
    
    Throws:
    
    IOException - if an input/output error occurs
  - deserializeSessionId
```
protected String deserializeSessionId(byte[] data)
                               throws IOException
```
    Load sessionID
    
    Throws:
    
    IOException - if an input/output error occurs
  - deserializeDeltaRequest
```
protected DeltaRequest deserializeDeltaRequest(DeltaSession session,
                                   byte[] data)
                                        throws ClassNotFoundException,
                                               IOException
```
    Load Deltarequest from external node Load the Class at container classloader
    
    Parameters:
    session -
    data - message data
    
    Returns:
    The request
    
    Throws:
    
    ClassNotFoundException
    
    IOException
    See Also:
    DeltaRequest.readExternal(java.io.ObjectInput)
  - serializeDeltaRequest
```
protected byte[] serializeDeltaRequest(DeltaSession session,
                           DeltaRequest deltaRequest)
                                throws IOException
```
    serialize DeltaRequest
    
    Parameters:
    deltaRequest -
    
    Returns:
    serialized delta request
    
    Throws:
    
    IOException
    See Also:
    DeltaRequest.writeExternal(java.io.ObjectOutput)
  - deserializeSessions
```
protected void deserializeSessions(byte[] data)
                            throws ClassNotFoundException,
                                   IOException
```
    Load sessions from other cluster node. FIXME replace currently sessions with same id without notification. FIXME SSO handling is not really correct with the session replacement!
    
    Throws:
    
    ClassNotFoundException - if a serialized class cannot be found during the reload
    
    IOException - if an input/output error occurs
  - serializeSessions
```
protected byte[] serializeSessions(Session[] currentSessions)
                            throws IOException
```
    Save any currently active sessions in the appropriate persistence mechanism, if any. If persistence is not supported, this method returns without doing anything.
    
    Throws:
    
    IOException - if an input/output error occurs
  - startInternal
```
protected void startInternal()
                      throws LifecycleException
```
    Start this component and implement the requirements of LifecycleBase.startInternal().
    
    Overrides:
    
    startInternal in class ClusterManagerBase
    
    Throws:
    
    LifecycleException - if this component detects a fatal error that prevents this component from being used
  - getAllClusterSessions
```
public void getAllClusterSessions()
```
    get from first session master the backup from all clustered sessions
    
    See Also:
    findSessionMasterMember()
  - findSessionMasterMember
```
protected Member findSessionMasterMember()
```
    Find the master of the session state
    
    Returns:
    master member of sessions
  - waitForSendAllSessions
```
protected void waitForSendAllSessions(long beforeSendTime)
```
    Wait that cluster session state is transfer or timeout after 60 Sec With stateTransferTimeout == -1 wait that backup is transfered (forever mode)
  - stopInternal
```
protected void stopInternal()
                     throws LifecycleException
```
    Stop this component and implement the requirements of LifecycleBase.stopInternal().
    
    Overrides:
    
    stopInternal in class ClusterManagerBase
    
    Throws:
    
    LifecycleException - if this component detects a fatal error that prevents this component from being used
  - messageDataReceived
```
public void messageDataReceived(ClusterMessage cmsg)
```
    A message was received from another node, this is the callback method to implement if you are interested in receiving replication messages.
    
    Parameters:
    cmsg - - the message received.
  - requestCompleted
```
public ClusterMessage requestCompleted(String sessionId)
```
    When the request has been completed, the replication valve will notify the manager, and the manager will decide whether any replication is needed or not. If there is a need for replication, the manager will create a session message and that will be replicated. The cluster determines where it gets sent.
    
    Parameters:
    sessionId - - the sessionId that just completed.
    
    Returns:
    a SessionMessage to be sent,
  - requestCompleted
```
public ClusterMessage requestCompleted(String sessionId,
                              boolean expires)
```
    When the request has been completed, the replication valve will notify the manager, and the manager will decide whether any replication is needed or not. If there is a need for replication, the manager will create a session message and that will be replicated. The cluster determines where it gets sent. Session expiration also calls this method, but with expires == true.
    
    Parameters:
    sessionId - - the sessionId that just completed.
    expires - - whether this method has been called during session expiration
    
    Returns:
    a SessionMessage to be sent,
  - resetStatistics
```
public void resetStatistics()
```
    Reset manager statistics
  - sessionExpired
```
protected void sessionExpired(String id)
```
    send session expired to other cluster nodes
    
    Parameters:
    id - session id
  - expireAllLocalSessions
```
public void expireAllLocalSessions()
```
    Expire all find sessions.
  - getInvalidatedSessions
```
public String[] getInvalidatedSessions()
```
    When the manager expires session not tied to a request. The cluster will periodically ask for a list of sessions that should expire and that should be sent across the wire.
    
    Returns:
    The invalidated sessions array
  - checkSenderDomain
```
protected boolean checkSenderDomain(SessionMessage msg,
                        Member sender)
```
    Test that sender and local domain is the same
  - messageReceived
```
protected void messageReceived(SessionMessage msg,
                   Member sender)
```
    This method is called by the received thread when a SessionMessage has been received from one of the other nodes in the cluster.
    
    Parameters:
    msg - - the message received
    sender - - the sender of the message, this is used if we receive a EVT_GET_ALL_SESSION message, so that we only reply to the requesting node
  - handleALL_SESSION_TRANSFERCOMPLETE
```
protected void handleALL_SESSION_TRANSFERCOMPLETE(SessionMessage msg,
                                      Member sender)
```
    handle receive session state is complete transfered
    
    Parameters:
    msg -
    sender -
  - handleSESSION_DELTA
```
protected void handleSESSION_DELTA(SessionMessage msg,
                       Member sender)
                            throws IOException,
                                   ClassNotFoundException
```
    handle receive session delta
    
    Parameters:
    msg -
    sender -
    
    Throws:
    
    IOException
    
    ClassNotFoundException
  - handleSESSION_ACCESSED
```
protected void handleSESSION_ACCESSED(SessionMessage msg,
                          Member sender)
                               throws IOException
```
    handle receive session is access at other node ( primary session is now false)
    
    Parameters:
    msg -
    sender -
    
    Throws:
    
    IOException
  - handleSESSION_EXPIRED
```
protected void handleSESSION_EXPIRED(SessionMessage msg,
                         Member sender)
                              throws IOException
```
    handle receive session is expire at other node ( expire session also here)
    
    Parameters:
    msg -
    sender -
    
    Throws:
    
    IOException
  - handleSESSION_CREATED
```
protected void handleSESSION_CREATED(SessionMessage msg,
                         Member sender)
```
    handle receive new session is created at other node (create backup - primary false)
    
    Parameters:
    msg -
    sender -
  - handleALL_SESSION_DATA
```
protected void handleALL_SESSION_DATA(SessionMessage msg,
                          Member sender)
                               throws ClassNotFoundException,
                                      IOException
```
    handle receive sessions from other not ( restart )
    
    Parameters:
    msg -
    sender -
    
    Throws:
    
    ClassNotFoundException
    
    IOException
  - handleGET_ALL_SESSIONS
```
protected void handleGET_ALL_SESSIONS(SessionMessage msg,
                          Member sender)
                               throws IOException
```
    handle receive that other node want all sessions ( restart ) a) send all sessions with one message b) send session at blocks After sending send state is complete transfered
    
    Parameters:
    msg -
    sender -
    
    Throws:
    
    IOException
  - handleCHANGE_SESSION_ID
```
protected void handleCHANGE_SESSION_ID(SessionMessage msg,
                           Member sender)
                                throws IOException
```
    handle receive change sessionID at other node
    
    Parameters:
    msg -
    sender -
    
    Throws:
    
    IOException
  - handleALL_SESSION_NOCONTEXTMANAGER
```
protected void handleALL_SESSION_NOCONTEXTMANAGER(SessionMessage msg,
                                      Member sender)
```
    handle receive no context manager.
    
    Parameters:
    msg -
    sender -
  - sendSessions
```
protected void sendSessions(Member sender,
                Session[] currentSessions,
                long sendTimestamp)
                     throws IOException
```
    send a block of session to sender
    
    Parameters:
    sender -
    currentSessions -
    sendTimestamp -
    
    Throws:
    
    IOException
  - cloneFromTemplate
```
public ClusterManager cloneFromTemplate()
```

Class DeltaManager

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.catalina.session.ManagerBase

Field Summary

Fields inherited from class org.apache.catalina.ha.session.ClusterManagerBase

Fields inherited from class org.apache.catalina.session.ManagerBase

Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase

Fields inherited from interface org.apache.catalina.Lifecycle

Constructor Summary

Method Summary

Methods inherited from class org.apache.catalina.ha.session.ClusterManagerBase

Methods inherited from class org.apache.catalina.session.ManagerBase

Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase

Methods inherited from class org.apache.catalina.util.LifecycleBase

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.catalina.Manager

Field Detail

log

sm

managerName

name

Constructor Detail

DeltaManager

Method Detail

setName

getName

getCounterSend_EVT_GET_ALL_SESSIONS

getCounterSend_EVT_SESSION_ACCESSED

getCounterSend_EVT_SESSION_CREATED

getCounterSend_EVT_SESSION_DELTA

getCounterSend_EVT_SESSION_EXPIRED

getCounterSend_EVT_ALL_SESSION_DATA

getCounterSend_EVT_ALL_SESSION_TRANSFERCOMPLETE

getCounterSend_EVT_CHANGE_SESSION_ID

getCounterReceive_EVT_ALL_SESSION_DATA

getCounterReceive_EVT_GET_ALL_SESSIONS

getCounterReceive_EVT_SESSION_ACCESSED

getCounterReceive_EVT_SESSION_CREATED

getCounterReceive_EVT_SESSION_DELTA

getCounterReceive_EVT_SESSION_EXPIRED

getCounterReceive_EVT_ALL_SESSION_TRANSFERCOMPLETE

getCounterReceive_EVT_CHANGE_SESSION_ID

getCounterReceive_EVT_ALL_SESSION_NOCONTEXTMANAGER

getProcessingTime

getSessionReplaceCounter

getCounterNoStateTransfered

getReceivedQueueSize

getStateTransferTimeout

setStateTransferTimeout

getStateTransfered

setStateTransfered

isNoContextManagerReceived

setNoContextManagerReceived

getSendAllSessionsWaitTime

setSendAllSessionsWaitTime

isStateTimestampDrop

setStateTimestampDrop

isSendAllSessions

setSendAllSessions

getSendAllSessionsSize

setSendAllSessionsSize

isNotifySessionListenersOnReplication

setNotifySessionListenersOnReplication

isExpireSessionsOnShutdown

setExpireSessionsOnShutdown

isNotifyContainerListenersOnReplication

setNotifyContainerListenersOnReplication

createSession

createSession

sendCreateSession

send

createEmptySession

getNewDeltaSession

changeSessionId

changeSessionId

changeSessionId

changeSessionId

sendChangeSessionId

serializeSessionId

deserializeSessionId