PersistentManager (Tomcat API Documentation)
Keywords: org.apache.catalina.session.PersistentManager class

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## org.apache.catalina.session
Class PersistentManager

    java.lang.Object
      org.apache.catalina.session.ManagerBase
          org.apache.catalina.session.PersistentManagerBase
              org.apache.catalina.session.PersistentManager

All Implemented Interfaces:
  java.beans.PropertyChangeListener, java.util.EventListener, javax.management.MBeanRegistration, Lifecycle, Manager

    public final class PersistentManager

extends PersistentManagerBase

Implementation of the Manager interface that makes use of a Store to swap active Sessions to disk. It can be configured to achieve several different goals:

- Persist sessions across restarts of the Container
- Fault tolerance, keep sessions backed up on disk to allow recovery in the event of unplanned restarts.
- Limit the number of active sessions kept in memory by swapping less active sessions out to disk.

Version:
  $Revision: 467222 $
Author:
  Kief Morris (kief@kief.com)

Field Summary
`protected static java.lang.String` | `name` The descriptive name of this Manager implementation (for logging).

Fields inherited from class org.apache.catalina.session.PersistentManagerBase
`lifecycle, maxActiveSessions, maxIdleBackup, maxIdleSwap, minIdleSwap, processingTime, rejectedSessions, saveOnRestart, started, store`

Fields inherited from class org.apache.catalina.session.ManagerBase
`algorithm, container, DEFAULT_ALGORITHM, devRandomSource, digest, distributable, domain, duplicates, entropy, expiredSessions, initialized, maxActive, maxInactiveInterval, mserver, oname, processExpiresFrequency, random, randomClass, randomIS, sessionAverageAliveTime, sessionCounter, sessionIdLength, sessionMaxAliveTime, sessions, sm, support`

Fields inherited from interface org.apache.catalina.Lifecycle
`AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, DESTROY_EVENT, INIT_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT`

Constructor Summary
`PersistentManager()`

Method Summary
`java.lang.String` | `getInfo()` Return descriptive information about this Manager implementation and the corresponding version number, in the format `<description>/<version>`.
`java.lang.String` | `getName()` Return the descriptive short name of this Manager implementation.

Methods inherited from class org.apache.catalina.session.PersistentManagerBase
`addLifecycleListener, clearStore, findLifecycleListeners, findSession, getMaxActiveSessions, getMaxIdleBackup, getMaxIdleSwap, getMinIdleSwap, getRejectedSessions, getSaveOnRestart, getStore, isLoaded, isStarted, load, processExpires, processMaxActiveSwaps, processMaxIdleBackups, processMaxIdleSwaps, processPersistenceChecks, propertyChange, remove, removeLifecycleListener, removeSession, removeSuper, setContainer, setMaxActiveSessions, setMaxIdleBackup, setMaxIdleSwap, setMinIdleSwap, setRejectedSessions, setSaveOnRestart, setStarted, setStore, start, stop, swapIn, swapOut, unload, writeSession`

Methods inherited from class org.apache.catalina.session.ManagerBase
`add, addPropertyChangeListener, backgroundProcess, createEmptySession, createSession, createSession, destroy, expireSession, findSessions, generateSessionId, getActiveSessions, getAlgorithm, getClassName, getContainer, getCreationTime, getCreationTimestamp, getDigest, getDistributable, getDomain, getDuplicates, getEngine, getEntropy, getExpiredSessions, getJvmRoute, getLastAccessedTime, getLastAccessedTimestamp, getMaxActive, getMaxInactiveInterval, getNewSession, getObjectName, getProcessExpiresFrequency, getProcessingTime, getRandom, getRandomBytes, getRandomClass, getRandomFile, getSession, getSessionAttribute, getSessionAverageAliveTime, getSessionCounter, getSessionIdLength, getSessionMaxAliveTime, init, listSessionIds, postDeregister, postRegister, preDeregister, preRegister, removePropertyChangeListener, setAlgorithm, setDistributable, setDuplicates, setEntropy, setExpiredSessions, setMaxActive, setMaxInactiveInterval, setProcessExpiresFrequency, setProcessingTime, setRandomClass, setRandomFile, setSessionAverageAliveTime, setSessionCounter, setSessionIdLength, setSessionMaxAliveTime`

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

Field Detail

### name

    protected static java.lang.String name

  The descriptive name of this Manager implementation (for logging).

Constructor Detail

### PersistentManager

    public PersistentManager()

Method Detail

### getInfo

    public java.lang.String getInfo()

  Return descriptive information about this Manager implementation and the corresponding version number, in the format `<description>/<version>`.

  Specified by:
    `getInfo` in interface `Manager`
  Overrides:
    `getInfo` in class `PersistentManagerBase`

### getName

    public java.lang.String getName()

  Return the descriptive short name of this Manager implementation.

  Overrides:
    `getName` in class `PersistentManagerBase`

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