Java Doc for ManagerBase.java in  » Sevlet-Container » tomcat-catalina » org » apache » catalina » session » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Sevlet Container » tomcat catalina » org.apache.catalina.session   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.catalina.session.ManagerBase All known Subclasses:   org.apache.catalina.session.StandardManager,  org.apache.catalina.session.PersistentManagerBase, ManagerBase abstract public class ManagerBase implements Manager,MBeanRegistration(Code) Minimal implementation of the Manager interface that supports no session persistence or distributable capabilities. This class may be subclassed to create more sophisticated Manager implementations. author:    Craig R. McClanahan version:    $Revision: 1.27 $ $Date: 2004/05/26 16:13:59 $ Field Summary final protected static  String DEFAULT_ALGORITHM      The default message digest algorithm to use if we cannot use the requested one. protected  String algorithm      The message digest algorithm to be used when generating session identifiers. protected  Container container      The Container with which this Manager is associated. protected  int debug      The debugging detail level for this component. protected  DefaultContext defaultContext      The DefaultContext with which this Manager is associated. protected  String devRandomSource      protected  MessageDigest digest      Return the MessageDigest implementation to be used when creating session identifiers. protected  boolean distributable      The distributable flag for Sessions created by this Manager. protected  String domain      protected  int duplicates      protected  String entropy      A String initialization parameter used to increase the entropy of the initialization of our random number generator. protected  boolean initialized      protected  Log log      protected  int maxActive      protected  int maxInactiveInterval      The default maximum inactive interval for Sessions created by this Manager. protected  MBeanServer mserver      protected static  String name      The descriptive name of this Manager implementation (for logging). protected  ObjectName oname      protected  Random random      A random number generator to use when generating session identifiers. protected  String randomClass      The Java class name of the random number generator class to be used when generating session identifiers. protected  DataInputStream randomIS      protected  int sessionCounter      protected  int sessionIdLength      The session id length of Sessions created by this Manager. protected  HashMap sessions      The set of currently active Sessions for this Manager, keyed by session identifier. protected static  StringManager sm      The string manager for this package. protected  PropertyChangeSupport support      The property change support for this component. Method Summary public  void add(Session session)      Add this Session to the set of active Sessions for this Manager. public  void addPropertyChangeListener(PropertyChangeListener listener)      Add a property change listener to this component. public  void backgroundProcess()      public  Session createEmptySession()      Get a session from the recycled ones or create a new empty one. public  Session createSession()      Construct and return a new session object, based on the default settings specified by this Manager's properties. public  void destroy()      public  void expireSession(String sessionId)      public  Session findSession(String id)      Return the active Session, associated with this Manager, with the specified session id (if any); otherwise return null. public  Session[] findSessions()      Return the set of active Sessions associated with this Manager. protected synchronized  String generateSessionId()      Generate and return a new session identifier. public  int getActiveSessions()      public  String getAlgorithm()      Return the message digest algorithm for this Manager. public  String getClassName()      Returns the name of the implementation class. public  Container getContainer()      Return the Container with which this Manager is associated. public  int getDebug()      Return the debugging detail level for this component. public  DefaultContext getDefaultContext()      Return the DefaultContext with which this Manager is associated. public synchronized  MessageDigest getDigest()      Return the MessageDigest object to be used for calculating session identifiers. public  boolean getDistributable()      Return the distributable flag for the sessions supported by this Manager. public  String getDomain()      public  int getDuplicates()      Number of duplicated session IDs generated by the random source. public  Engine getEngine()      Retrieve the enclosing Engine for this Manager. public  String getEntropy()      Return the entropy increaser value, or compute a semi-useful value if this String has not yet been set. public  String getInfo()      Return descriptive information about this Manager implementation and the corresponding version number, in the format <description>/<version>. public  String getJvmRoute()      Retrieve the JvmRoute for the enclosing Engine. public  String getLastAccessedTime(String sessionId)      public  int getMaxActive()      public  int getMaxInactiveInterval()      Return the default maximum inactive interval (in seconds) for Sessions created by this Manager. public  String getName()      Return the descriptive short name of this Manager implementation. protected  StandardSession getNewSession()      Get new session class to be used in the doLoad() method. public  ObjectName getObjectName()      public synchronized  Random getRandom()      Return the random number generator instance we should use for generating session identifiers. protected  void getRandomBytes(byte bytes)      public  String getRandomClass()      Return the random number generator class name. public  String getRandomFile()      public  String getSessionAttribute(String sessionId, String key)      public  int getSessionCounter()      Total sessions created by this manager. public  int getSessionIdLength()      Gets the session id length (in bytes) of Sessions created by this Manager. public  void init()      public  String listSessionIds()      protected  void log(String message)      Log a message on the Logger associated with our Container (if any). protected  void log(String message, Throwable throwable)      Log a message on the Logger associated with our Container (if any). public  void postDeregister()      public  void postRegister(Boolean registrationDone)      public  void preDeregister()      public  ObjectName preRegister(MBeanServer server, ObjectName name)      public  void remove(Session session)      Remove this Session from the active Sessions for this Manager. public  void removePropertyChangeListener(PropertyChangeListener listener)      Remove a property change listener from this component. public  void setAlgorithm(String algorithm)      Set the message digest algorithm for this Manager. public  void setContainer(Container container)      Set the Container with which this Manager is associated. public  void setDebug(int debug)      Set the debugging detail level for this component. public  void setDefaultContext(DefaultContext defaultContext)      Set the DefaultContext with which this Manager is associated. public  void setDistributable(boolean distributable)      Set the distributable flag for the sessions supported by this Manager. public  void setDuplicates(int duplicates)      public  void setEntropy(String entropy)      Set the entropy increaser value. public  void setMaxActive(int maxActive)      public  void setMaxInactiveInterval(int interval)      Set the default maximum inactive interval (in seconds) for Sessions created by this Manager. public  void setRandomClass(String randomClass)      Set the random number generator class name. public  void setRandomFile(String s)      Use /dev/random-type special device. public  void setSessionCounter(int sessionCounter)      public  void setSessionIdLength(int idLength)      Sets the session id length (in bytes) for Sessions created by this Manager. Field Detail DEFAULT_ALGORITHM final protected static String DEFAULT_ALGORITHM(Code) The default message digest algorithm to use if we cannot use the requested one. algorithm protected String algorithm(Code) The message digest algorithm to be used when generating session identifiers. This must be an algorithm supported by the java.security.MessageDigest class on your platform. container protected Container container(Code) The Container with which this Manager is associated. debug protected int debug(Code) The debugging detail level for this component. defaultContext protected DefaultContext defaultContext(Code) The DefaultContext with which this Manager is associated. devRandomSource protected String devRandomSource(Code) digest protected MessageDigest digest(Code) Return the MessageDigest implementation to be used when creating session identifiers. distributable protected boolean distributable(Code) The distributable flag for Sessions created by this Manager. If this flag is set to true, any user attributes added to a session controlled by this Manager must be Serializable. domain protected String domain(Code) duplicates protected int duplicates(Code) entropy protected String entropy(Code) A String initialization parameter used to increase the entropy of the initialization of our random number generator. initialized protected boolean initialized(Code) log protected Log log(Code) maxActive protected int maxActive(Code) maxInactiveInterval protected int maxInactiveInterval(Code) The default maximum inactive interval for Sessions created by this Manager. mserver protected MBeanServer mserver(Code) name protected static String name(Code) The descriptive name of this Manager implementation (for logging). oname protected ObjectName oname(Code) random protected Random random(Code) A random number generator to use when generating session identifiers. randomClass protected String randomClass(Code) The Java class name of the random number generator class to be used when generating session identifiers. randomIS protected DataInputStream randomIS(Code) sessionCounter protected int sessionCounter(Code) sessionIdLength protected int sessionIdLength(Code) The session id length of Sessions created by this Manager. sessions protected HashMap sessions(Code) The set of currently active Sessions for this Manager, keyed by session identifier. sm protected static StringManager sm(Code) The string manager for this package. support protected PropertyChangeSupport support(Code) The property change support for this component. Method Detail add public void add(Session session)(Code) Add this Session to the set of active Sessions for this Manager. Parameters:   session - Session to be added addPropertyChangeListener public void addPropertyChangeListener(PropertyChangeListener listener)(Code) Add a property change listener to this component. Parameters:   listener - The listener to add backgroundProcess public void backgroundProcess()(Code) Implements the Manager interface, direct call to processExpires createEmptySession public Session createEmptySession()(Code) Get a session from the recycled ones or create a new empty one. The PersistentManager manager does not need to create session data because it reads it from the Store. createSession public Session createSession()(Code) 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. exception:   IllegalStateException - if a new session cannot beinstantiated for any reason destroy public void destroy()(Code) expireSession public void expireSession(String sessionId)(Code) findSession public Session findSession(String id) throws IOException(Code) Return the active Session, associated with this Manager, with the specified session id (if any); otherwise return null. Parameters:   id - The session id for the session to be returned exception:   IllegalStateException - if a new session cannot beinstantiated for any reason exception:   IOException - if an input/output error occurs whileprocessing this request findSessions public Session[] findSessions()(Code) Return the set of active Sessions associated with this Manager. If this Manager has no active Sessions, a zero-length array is returned. generateSessionId protected synchronized String generateSessionId()(Code) Generate and return a new session identifier. getActiveSessions public int getActiveSessions()(Code) Returns the number of active sessions number of sessions active getAlgorithm public String getAlgorithm()(Code) Return the message digest algorithm for this Manager. getClassName public String getClassName()(Code) Returns the name of the implementation class. getContainer public Container getContainer()(Code) Return the Container with which this Manager is associated. getDebug public int getDebug()(Code) Return the debugging detail level for this component. getDefaultContext public DefaultContext getDefaultContext()(Code) Return the DefaultContext with which this Manager is associated. getDigest public synchronized MessageDigest getDigest()(Code) Return the MessageDigest object to be used for calculating session identifiers. If none has been created yet, initialize one the first time this method is called. getDistributable public boolean getDistributable()(Code) Return the distributable flag for the sessions supported by this Manager. getDomain public String getDomain()(Code) getDuplicates public int getDuplicates()(Code) Number of duplicated session IDs generated by the random source. Anything bigger than 0 means problems. The count of duplicates getEngine public Engine getEngine()(Code) Retrieve the enclosing Engine for this Manager. an Engine object (or null). getEntropy public String getEntropy()(Code) Return the entropy increaser value, or compute a semi-useful value if this String has not yet been set. getInfo public String getInfo()(Code) Return descriptive information about this Manager implementation and the corresponding version number, in the format <description>/<version>. getJvmRoute public String getJvmRoute()(Code) Retrieve the JvmRoute for the enclosing Engine. the JvmRoute or null. getLastAccessedTime public String getLastAccessedTime(String sessionId)(Code) getMaxActive public int getMaxActive()(Code) Max number of concurrent active sessions The highest number of concurrent active sessions getMaxInactiveInterval public int getMaxInactiveInterval()(Code) Return the default maximum inactive interval (in seconds) for Sessions created by this Manager. getName public String getName()(Code) Return the descriptive short name of this Manager implementation. getNewSession protected StandardSession getNewSession()(Code) Get new session class to be used in the doLoad() method. getObjectName public ObjectName getObjectName()(Code) getRandom public synchronized Random getRandom()(Code) Return the random number generator instance we should use for generating session identifiers. If there is no such generator currently defined, construct and seed a new one. getRandomBytes protected void getRandomBytes(byte bytes)(Code) getRandomClass public String getRandomClass()(Code) Return the random number generator class name. getRandomFile public String getRandomFile()(Code) getSessionAttribute public String getSessionAttribute(String sessionId, String key)(Code) For debugging: get a session attribute Parameters:   sessionId - Parameters:   key - The attribute value, if found, null otherwise getSessionCounter public int getSessionCounter()(Code) Total sessions created by this manager. sessions created getSessionIdLength public int getSessionIdLength()(Code) Gets the session id length (in bytes) of Sessions created by this Manager. The session id length init public void init()(Code) listSessionIds public String listSessionIds()(Code) For debugging: return a list of all session ids currently active log protected void log(String message)(Code) Log a message on the Logger associated with our Container (if any). Parameters:   message - Message to be logged log protected void log(String message, Throwable throwable)(Code) Log a message on the Logger associated with our Container (if any). Parameters:   message - Message to be logged Parameters:   throwable - Associated exception postDeregister public void postDeregister()(Code) postRegister public void postRegister(Boolean registrationDone)(Code) preDeregister public void preDeregister() throws Exception(Code) preRegister public ObjectName preRegister(MBeanServer server, ObjectName name) throws Exception(Code) remove public void remove(Session session)(Code) Remove this Session from the active Sessions for this Manager. Parameters:   session - Session to be removed removePropertyChangeListener public void removePropertyChangeListener(PropertyChangeListener listener)(Code) Remove a property change listener from this component. Parameters:   listener - The listener to remove setAlgorithm public void setAlgorithm(String algorithm)(Code) Set the message digest algorithm for this Manager. Parameters:   algorithm - The new message digest algorithm setContainer public void setContainer(Container container)(Code) Set the Container with which this Manager is associated. Parameters:   container - The newly associated Container setDebug public void setDebug(int debug)(Code) Set the debugging detail level for this component. Parameters:   debug - The new debugging detail level setDefaultContext public void setDefaultContext(DefaultContext defaultContext)(Code) Set the DefaultContext with which this Manager is associated. Parameters:   defaultContext - The newly associated DefaultContext setDistributable public void setDistributable(boolean distributable)(Code) Set the distributable flag for the sessions supported by this Manager. If this flag is set, all user data objects added to sessions associated with this manager must implement Serializable. Parameters:   distributable - The new distributable flag setDuplicates public void setDuplicates(int duplicates)(Code) setEntropy public void setEntropy(String entropy)(Code) Set the entropy increaser value. Parameters:   entropy - The new entropy increaser value setMaxActive public void setMaxActive(int maxActive)(Code) setMaxInactiveInterval public void setMaxInactiveInterval(int interval)(Code) Set the default maximum inactive interval (in seconds) for Sessions created by this Manager. Parameters:   interval - The new default value setRandomClass public void setRandomClass(String randomClass)(Code) Set the random number generator class name. Parameters:   randomClass - The new random number generator class name setRandomFile public void setRandomFile(String s)(Code) Use /dev/random-type special device. This is new code, but may reduce the big delay in generating the random. You must specify a path to a random generator file. Use /dev/urandom for linux ( or similar ) systems. Use /dev/random for maximum security ( it may block if not enough "random" exist ). You can also use a pipe that generates random. The code will check if the file exists, and default to java Random if not found. There is a significant performance difference, very visible on the first call to getSession ( like in the first JSP ) - so use it if available. setSessionCounter public void setSessionCounter(int sessionCounter)(Code) setSessionIdLength public void setSessionIdLength(int idLength)(Code) Sets the session id length (in bytes) for Sessions created by this Manager. Parameters:   idLength - The session id length Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)