Class DefaultSessionIdManager

java.lang.Object
org.eclipse.jetty.util.component.AbstractLifeCycle
org.eclipse.jetty.util.component.ContainerLifeCycle
org.eclipse.jetty.session.DefaultSessionIdManager
All Implemented Interfaces:
SessionIdManager, Container, Destroyable, Dumpable, Dumpable.DumpableContainer, LifeCycle
@ManagedObject public class DefaultSessionIdManager extends ContainerLifeCycle implements SessionIdManager
Manages session ids to ensure each session id within a context is unique, and that session ids can be shared across contexts (but not session contents).

There is only 1 session id manager per Server instance.

Runs a HouseKeeper thread to periodically check for expired Sessions.

See Also:

  • Field Details

    • __NEW_SESSION_ID

      public static final String __NEW_SESSION_ID
      See Also:

    • COUNTER

      protected static final AtomicLong COUNTER

    • _random

      protected Random _random

    • _weakRandom

      protected boolean _weakRandom

    • _workerName

      protected String _workerName

    • _reseed

      protected long _reseed

    • _server

      protected Server _server

    • _houseKeeper

      protected HouseKeeper _houseKeeper

    • _ownHouseKeeper

      protected boolean _ownHouseKeeper

  • Constructor Details

    • DefaultSessionIdManager

      public DefaultSessionIdManager(Server server)
      Parameters:
      server - the server associated with the id manager

    • DefaultSessionIdManager

      public DefaultSessionIdManager(Server server, Random random)
      Parameters:
      server - the server associated with the id manager
      random - a random number generator to use for ids

  • Method Details

    • setServer

      public void setServer(Server server)
      Set the server associated with this id manager.
      Parameters:
      server - the server associated with this id manager

    • getServer

      public Server getServer()
      Get the server associated with this id manager.
      Returns:
      the server associated with this id manager

    • setSessionHouseKeeper

      public void setSessionHouseKeeper(HouseKeeper houseKeeper)
      Description copied from interface: SessionIdManager
      Set the housekeeper for doing scavenging.
      Specified by:
      setSessionHouseKeeper in interface SessionIdManager
      Parameters:
      houseKeeper - the housekeeper

    • getSessionHouseKeeper

      public HouseKeeper getSessionHouseKeeper()
      Specified by:
      getSessionHouseKeeper in interface SessionIdManager
      Returns:
      the housekeeper

    • getWorkerName

      @ManagedAttribute(value="unique name for this node", readonly=true) public String getWorkerName()
      Get the workname. If set, the workername is dot appended to the session ID and can be used to assist session affinity in a load balancer.
      Specified by:
      getWorkerName in interface SessionIdManager
      Returns:
      name or null

    • setWorkerName

      public void setWorkerName(String workerName)
      Set the workername. If set, the workername is dot appended to the session ID and can be used to assist session affinity in a load balancer.
      Parameters:
      workerName - the name of the worker, if null it is coerced to empty string

    • getRandom

      public Random getRandom()
      Get the random number generator.
      Returns:
      the random number generator

    • setRandom

      public void setRandom(Random random)
      Set a random number generator for generating ids.
      Parameters:
      random - a random number generator for generating ids

    • getReseed

      public long getReseed()
      Get the reseed probability.
      Returns:
      the reseed probability

    • setReseed

      public void setReseed(long reseed)
      Set the reseed probability.
      Parameters:
      reseed - If non zero then when a random long modulo the reseed value == 1, the SecureRandom will be reseeded.

    • newSessionId

      public String newSessionId(Request request, String requestedId, long created)
      Create a new session id if necessary.
      Specified by:
      newSessionId in interface SessionIdManager
      Parameters:
      request - the request asking for a new session
      requestedId - the session id requested by the session
      created - the timestamp for when the session was created
      Returns:
      the new session id

    • newSessionId

      public String newSessionId(long seedTerm)
      Parameters:
      seedTerm - the seed for RNG
      Returns:
      a new unique session id

    • isIdInUse

      public boolean isIdInUse(String id)
      Specified by:
      isIdInUse in interface SessionIdManager
      Parameters:
      id - The plain session ID (ie no workername extension)
      Returns:
      True if the session ID is in use by at least one context.

    • doStart

      protected void doStart() throws Exception
      Description copied from class: ContainerLifeCycle
      Starts the managed lifecycle beans in the order they were added.
      Overrides:
      doStart in class ContainerLifeCycle
      Throws:
      Exception - If there was a problem starting. Will cause a transition to FAILED state

    • doStop

      protected void doStop() throws Exception
      Description copied from class: ContainerLifeCycle
      Stops the managed lifecycle beans in the reverse order they were added.
      Overrides:
      doStop in class ContainerLifeCycle
      Throws:
      Exception - If there was a problem stopping. Will cause a transition to FAILED state

    • initRandom

      public void initRandom()
      Set up a random number generator for the sessionids. By preference, use a SecureRandom but allow to be injected.

    • getExtendedId

      public String getExtendedId(String clusterId, Request request)
      Get the session ID with any worker ID.
      Specified by:
      getExtendedId in interface SessionIdManager
      Parameters:
      clusterId - the cluster id
      request - the request
      Returns:
      sessionId plus any worker ID.

    • getId

      public String getId(String extendedId)
      Get the session ID without any worker ID.
      Specified by:
      getId in interface SessionIdManager
      Parameters:
      extendedId - the session id with the worker extension
      Returns:
      sessionId without any worker ID.

    • expireAll

      public void expireAll(String id)
      Remove an id from use by telling all contexts to remove a session with this id.
      Specified by:
      expireAll in interface SessionIdManager
      Parameters:
      id - The session ID without any cluster node extension

    • invalidateAll

      public void invalidateAll(String id)
      Description copied from interface: SessionIdManager
      Invalidate all sessions on all contexts that share the same id.
      Specified by:
      invalidateAll in interface SessionIdManager
      Parameters:
      id - the session id

    • scavenge

      public void scavenge()
      Specified by:
      scavenge in interface SessionIdManager

    • renewSessionId

      public String renewSessionId(String oldClusterId, String oldNodeId, Request request)
      Generate a new id for a session and update across all SessionManagers.
      Specified by:
      renewSessionId in interface SessionIdManager
      Parameters:
      oldClusterId - the old plain session id
      oldNodeId - the old fully qualified id
      request - the request containing the session
      Returns:
      the new session id

    • getSessionManagers

      public Set<SessionManager> getSessionManagers()
      Get SessionManager for every context.
      Returns:
      all SessionManagers that are running

    • toString

      public String toString()
      Overrides:
      toString in class AbstractLifeCycle