/*
* Licensed to the Apache Software Foundation ( ASF ) under one or more
* contributor license agreements . See the NOTICE file distributed with
* this work for additional information regarding copyright ownership .
* The ASF licenses this file to You under the Apache License , Version 2 . 0
* ( the " License " ) ; you may not use this file except in compliance with
* the License . You may obtain a copy of the License at
*
* http : //www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing , software
* distributed under the License is distributed on an " AS IS " BASIS ,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND , either express or implied .
* See the License for the specific language governing permissions and
* limitations under the License .
*/
package org.apache.catalina.session;
import java.beans.PropertyChangeSupport;
import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamException;
import java.io.Serializable;
import java.io.WriteAbortedException;
import java.security.AccessController;
import java.security.Principal;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicInteger;
import jakarta.servlet.ServletContext;
import jakarta.servlet.http.HttpSession;
import jakarta.servlet.http.HttpSessionActivationListener;
import jakarta.servlet.http.HttpSessionAttributeListener;
import jakarta.servlet.http.HttpSessionBindingEvent;
import jakarta.servlet.http.HttpSessionBindingListener;
import jakarta.servlet.http.HttpSessionEvent;
import jakarta.servlet.http.HttpSessionIdListener;
import jakarta.servlet.http.HttpSessionListener;
import org.apache.catalina.Context;
import org.apache.catalina.Globals;
import org.apache.catalina.Manager;
import org.apache.catalina.Session;
import org.apache.catalina.SessionEvent;
import org.apache.catalina.SessionListener;
import org.apache.catalina.TomcatPrincipal;
import org.apache.catalina.authenticator.SavedRequest;
import org.apache.catalina.security.SecurityUtil;
import org.apache.tomcat.util.ExceptionUtils;
import org.apache.tomcat.util.res.StringManager;
/**
* Standard implementation of the < b > Session < / b > interface . This object is serializable , so that it can be stored in
* persistent storage or transferred to a different JVM for distributable session support .
* < p >
* < b > IMPLEMENTATION NOTE < / b > : An instance of this class represents both the internal ( Session ) and application level
* ( HttpSession ) view of the session . However , because the class itself is not declared public , Java logic outside of
* the < code > org . apache . catalina . session < / code > package cannot cast an HttpSession view of this instance back to a
* Session view .
* < p >
* < b > IMPLEMENTATION NOTE < / b > : If you add fields to this class , you must make sure that you carry them over in the
* read / writeObject methods so that this class is properly serialized .
*
* @ author Craig R . McClanahan
* @ author Sean Legassick
* @ author < a href = " mailto : jon @ latchkey . com " > Jon S . Stevens < / a >
*/
public class StandardSession implements HttpSession, Session, Serializable {
private static final long serialVersionUID = 1 L;
// ----------------------------------------------------------- Constructors
/**
* Construct a new Session associated with the specified Manager .
*
* @ param manager The manager with which this Session is associated
*/
public StandardSession(Manager manager) {
super ();
this .manager = manager;
if (manager != null ) {
// Manager could be null in test environments
activityCheck = manager.getSessionActivityCheck();
lastAccessAtStart = manager.getSessionLastAccessAtStart();
}
// Initialize access count
if (activityCheck) {
accessCount = new AtomicInteger();
}
}
// ----------------------------------------------------- Instance Variables
/**
* Type array .
*/
protected static final String EMPTY_ARRAY[] = new String[0 ];
/**
* The collection of user data attributes associated with this Session .
*/
protected ConcurrentMap<String,Object> attributes = new ConcurrentHashMap<>();
/**
* The authentication type used to authenticate our cached Principal , if any . NOTE : This value is not included in
* the serialized version of this object .
*/
protected transient String authType = null ;
/**
* The time this session was created , in milliseconds since midnight , January 1 , 1970 GMT .
*/
protected long creationTime = 0 L;
/**
* We are currently processing a session expiration , so bypass certain IllegalStateException tests . NOTE : This value
* is not included in the serialized version of this object .
*/
protected transient volatile boolean expiring = false ;
/**
* The facade associated with this session . NOTE : This value is not included in the serialized version of this
* object .
*/
protected transient StandardSessionFacade facade = null ;
/**
* The session identifier of this Session .
*/
protected String id = null ;
/**
* The last accessed time for this Session .
*/
protected volatile long lastAccessedTime = creationTime;
/**
* The session event listeners for this Session .
*/
protected transient ArrayList<SessionListener> listeners = new ArrayList<>();
/**
* The Manager with which this Session is associated .
*/
protected transient Manager manager = null ;
/**
* The maximum time interval , in seconds , between client requests before the servlet container may invalidate this
* session . A negative time indicates that the session should never time out .
*/
protected volatile int maxInactiveInterval = -1 ;
/**
* Flag indicating whether this session is new or not .
*/
protected volatile boolean isNew = false ;
/**
* Flag indicating whether this session is valid or not .
*/
protected volatile boolean isValid = false ;
/**
* Internal notes associated with this session by Catalina components and event listeners . < b > IMPLEMENTATION
* NOTE : < / b > This object is < em > not < / em > saved and restored across session serializations !
*/
protected transient Map<String,Object> notes = new ConcurrentHashMap<>();
/**
* The authenticated Principal associated with this session , if any . < b > IMPLEMENTATION NOTE : < / b > This object is
* < i > not < / i > saved and restored across session serializations !
*/
protected transient Principal principal = null ;
/**
* The string manager for this package .
*/
protected static final StringManager sm = StringManager.getManager(StandardSession.class );
/**
* The property change support for this component . NOTE : This value is not included in the serialized version of
* this object .
*/
protected final transient PropertyChangeSupport support = new PropertyChangeSupport(this );
/**
* The current accessed time for this session .
*/
protected volatile long thisAccessedTime = creationTime;
/**
* The access count for this session .
*/
protected transient AtomicInteger accessCount = null ;
/**
* The activity check for this session .
*/
protected transient boolean activityCheck;
/**
* The behavior of the last access check .
*/
protected transient boolean lastAccessAtStart;
// ----------------------------------------------------- Session Properties
/**
* Return the authentication type used to authenticate our cached Principal , if any .
*/
@Override
public String getAuthType() {
return this .authType;
}
/**
* Set the authentication type used to authenticate our cached Principal , if any .
*
* @ param authType The new cached authentication type
*/
@Override
public void setAuthType(String authType) {
String oldAuthType = this .authType;
this .authType = authType;
support.firePropertyChange("authType" , oldAuthType, this .authType);
}
/**
* Set the creation time for this session . This method is called by the Manager when an existing Session instance is
* reused .
*
* @ param time The new creation time
*/
@Override
public void setCreationTime(long time) {
this .creationTime = time;
this .lastAccessedTime = time;
this .thisAccessedTime = time;
}
/**
* Return the session identifier for this session .
*/
@Override
public String getId() {
return this .id;
}
/**
* Return the session identifier for this session .
*/
@Override
public String getIdInternal() {
return this .id;
}
/**
* Set the session identifier for this session .
*
* @ param id The new session identifier
*/
@Override
public void setId(String id) {
setId(id, true );
}
@Override
public void setId(String id, boolean notify) {
if ((this .id != null ) && (manager != null )) {
manager.remove(this );
}
this .id = id;
if (manager != null ) {
manager.add(this );
}
if (notify) {
tellNew();
}
}
/**
* Inform the listeners about the new session .
*/
public void tellNew() {
// Notify interested session event listeners
fireSessionEvent(SESSION_CREATED_EVENT, null );
// Notify interested application event listeners
Context context = manager.getContext();
Object listeners[] = context.getApplicationLifecycleListeners();
if (listeners != null && listeners.length > 0 ) {
HttpSessionEvent event = new HttpSessionEvent(getSession());
for (Object o : listeners) {
if (!(o instanceof HttpSessionListener)) {
continue ;
}
HttpSessionListener listener = (HttpSessionListener) o;
try {
context.fireContainerEvent("beforeSessionCreated" , listener);
listener.sessionCreated(event);
context.fireContainerEvent("afterSessionCreated" , listener);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
try {
context.fireContainerEvent("afterSessionCreated" , listener);
} catch (Exception e) {
// Ignore
}
manager.getContext().getLogger().error(sm.getString("standardSession.sessionEvent" ), t);
}
}
}
}
/**
* Inform the listeners about the change session ID .
*
* @ param newId new session ID
* @ param oldId old session ID
* @ param notifySessionListeners Should any associated sessionListeners be notified that session ID has been
* changed ?
* @ param notifyContainerListeners Should any associated ContainerListeners be notified that session ID has been
* changed ?
*/
@Override
public void tellChangedSessionId(String newId, String oldId, boolean notifySessionListeners,
boolean notifyContainerListeners) {
Context context = manager.getContext();
// notify ContainerListeners
if (notifyContainerListeners) {
context.fireContainerEvent(Context.CHANGE_SESSION_ID_EVENT, new String[] { oldId, newId });
}
// notify HttpSessionIdListener
if (notifySessionListeners) {
Object listeners[] = context.getApplicationEventListeners();
if (listeners != null && listeners.length > 0 ) {
HttpSessionEvent event = new HttpSessionEvent(getSession());
for (Object listener : listeners) {
if (!(listener instanceof HttpSessionIdListener)) {
continue ;
}
HttpSessionIdListener idListener = (HttpSessionIdListener) listener;
try {
idListener.sessionIdChanged(event, oldId);
} catch (Throwable t) {
manager.getContext().getLogger().error(sm.getString("standardSession.sessionEvent" ), t);
}
}
}
}
}
/**
* Return the last time the client sent a request associated with this session , as the number of milliseconds since
* midnight , January 1 , 1970 GMT . Actions that your application takes , such as getting or setting a value associated
* with the session , do not affect the access time . This one gets updated whenever a request starts .
*/
@Override
public long getThisAccessedTime() {
if (!isValidInternal()) {
throw new IllegalStateException(sm.getString("standardSession.getThisAccessedTime.ise" ));
}
return this .thisAccessedTime;
}
/**
* Return the last client access time without invalidation check
*
* @ see # getThisAccessedTime ( )
*/
@Override
public long getThisAccessedTimeInternal() {
return this .thisAccessedTime;
}
/**
* Return the last time the client sent a request associated with this session , as the number of milliseconds since
* midnight , January 1 , 1970 GMT . Actions that your application takes , such as getting or setting a value associated
* with the session , do not affect the access time . This one gets updated whenever a request finishes .
*/
@Override
public long getLastAccessedTime() {
if (!isValidInternal()) {
throw new IllegalStateException(sm.getString("standardSession.getLastAccessedTime.ise" ));
}
return this .lastAccessedTime;
}
/**
* Return the last client access time without invalidation check
*
* @ see # getLastAccessedTime ( )
*/
@Override
public long getLastAccessedTimeInternal() {
return this .lastAccessedTime;
}
/**
* Return the idle time ( in milliseconds ) from last client access time .
*/
@Override
public long getIdleTime() {
if (!isValidInternal()) {
throw new IllegalStateException(sm.getString("standardSession.getIdleTime.ise" ));
}
return getIdleTimeInternal();
}
/**
* Return the idle time from last client access time without invalidation check
*
* @ see # getIdleTime ( )
*/
@Override
public long getIdleTimeInternal() {
long timeNow = System.currentTimeMillis();
long timeIdle;
if (lastAccessAtStart) {
timeIdle = timeNow - lastAccessedTime;
} else {
timeIdle = timeNow - thisAccessedTime;
}
return timeIdle;
}
/**
* Return the Manager within which this Session is valid .
*/
@Override
public Manager getManager() {
return this .manager;
}
/**
* Set the Manager within which this Session is valid .
*
* @ param manager The new Manager
*/
@Override
public void setManager(Manager manager) {
this .manager = manager;
}
/**
* Return the maximum time interval , in seconds , between client requests before the servlet container will
* invalidate the session . A negative time indicates that the session should never time out .
*/
@Override
public int getMaxInactiveInterval() {
return this .maxInactiveInterval;
}
/**
* Set the maximum time interval , in seconds , between client requests before the servlet container will invalidate
* the session . A zero or negative time indicates that the session should never time out .
*
* @ param interval The new maximum interval
*/
@Override
public void setMaxInactiveInterval(int interval) {
this .maxInactiveInterval = interval;
}
/**
* Set the < code > isNew < / code > flag for this session .
*
* @ param isNew The new value for the < code > isNew < / code > flag
*/
@Override
public void setNew(boolean isNew) {
this .isNew = isNew;
}
/**
* Return the authenticated Principal that is associated with this Session . This provides an
* < code > Authenticator < / code > with a means to cache a previously authenticated Principal , and avoid potentially
* expensive < code > Realm . authenticate ( ) < / code > calls on every request . If there is no current associated Principal ,
* return < code > null < / code > .
*/
@Override
public Principal getPrincipal() {
return this .principal;
}
/**
* Set the authenticated Principal that is associated with this Session . This provides an < code > Authenticator < / code >
* with a means to cache a previously authenticated Principal , and avoid potentially expensive
* < code > Realm . authenticate ( ) < / code > calls on every request .
*
* @ param principal The new Principal , or < code > null < / code > if none
*/
@Override
public void setPrincipal(Principal principal) {
Principal oldPrincipal = this .principal;
this .principal = principal;
support.firePropertyChange("principal" , oldPrincipal, this .principal);
}
/**
* Return the < code > HttpSession < / code > for which this object is the facade .
*/
@Override
public HttpSession getSession() {
if (facade == null ) {
if (SecurityUtil.isPackageProtectionEnabled()) {
facade = AccessController.doPrivileged(new PrivilegedNewSessionFacade(this ));
} else {
facade = new StandardSessionFacade(this );
}
}
return facade;
}
/**
* Return the < code > isValid < / code > flag for this session .
*/
@Override
public boolean isValid() {
if (!this .isValid) {
return false ;
}
if (this .expiring) {
return true ;
}
if (activityCheck && accessCount.get() > 0 ) {
return true ;
}
if (maxInactiveInterval > 0 ) {
int timeIdle = (int ) (getIdleTimeInternal() / 1000 L);
if (timeIdle >= maxInactiveInterval) {
expire(true );
}
}
return this .isValid;
}
/**
* Set the < code > isValid < / code > flag for this session .
*
* @ param isValid The new value for the < code > isValid < / code > flag
*/
@Override
public void setValid(boolean isValid) {
this .isValid = isValid;
}
// ------------------------------------------------- Session Public Methods
/**
* Update the accessed time information for this session . This method should be called by the context when a request
* comes in for a particular session , even if the application does not reference it .
*/
@Override
public void access() {
this .thisAccessedTime = System.currentTimeMillis();
if (activityCheck) {
accessCount.incrementAndGet();
}
}
/**
* End the access .
*/
@Override
public void endAccess() {
isNew = false ;
/*
* The servlet spec mandates to ignore request handling time in lastAccessedTime .
*/
if (lastAccessAtStart) {
this .lastAccessedTime = this .thisAccessedTime;
this .thisAccessedTime = System.currentTimeMillis();
} else {
this .thisAccessedTime = System.currentTimeMillis();
this .lastAccessedTime = this .thisAccessedTime;
}
if (activityCheck) {
accessCount.decrementAndGet();
}
}
/**
* Add a session event listener to this component .
*/
@Override
public void addSessionListener(SessionListener listener) {
listeners.add(listener);
}
/**
* Perform the internal processing required to invalidate this session , without triggering an exception if the
* session has already expired .
*/
@Override
public void expire() {
expire(true );
}
/**
* Perform the internal processing required to invalidate this session , without triggering an exception if the
* session has already expired .
*
* @ param notify Should we notify listeners about the demise of this session ?
*/
public void expire(boolean notify) {
// Check to see if session has already been invalidated.
// Do not check expiring at this point as expire should not return until
// isValid is false
if (!isValid) {
return ;
}
synchronized (this ) {
// Check again, now we are inside the sync so this code only runs once
// Double check locking - isValid needs to be volatile
// The check of expiring is to ensure that an infinite loop is not
// entered as per bug 56339
if (expiring || !isValid) {
return ;
}
if (manager == null ) {
return ;
}
// Mark this session as "being expired"
expiring = true ;
// Notify interested application event listeners
// FIXME - Assumes we call listeners in reverse order
Context context = manager.getContext();
// The call to expire() may not have been triggered by the webapp.
// Make sure the webapp's class loader is set when calling the
// listeners
if (notify) {
ClassLoader oldContextClassLoader = null ;
try {
oldContextClassLoader = context.bind(Globals.IS_SECURITY_ENABLED, null );
Object listeners[] = context.getApplicationLifecycleListeners();
if (listeners != null && listeners.length > 0 ) {
HttpSessionEvent event = new HttpSessionEvent(getSession());
for (int i = 0 ; i < listeners.length; i++) {
int j = (listeners.length - 1 ) - i;
if (!(listeners[j] instanceof HttpSessionListener)) {
continue ;
}
HttpSessionListener listener = (HttpSessionListener) listeners[j];
try {
context.fireContainerEvent("beforeSessionDestroyed" , listener);
listener.sessionDestroyed(event);
context.fireContainerEvent("afterSessionDestroyed" , listener);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
try {
context.fireContainerEvent("afterSessionDestroyed" , listener);
} catch (Exception e) {
// Ignore
}
manager.getContext().getLogger().error(sm.getString("standardSession.sessionEvent" ), t);
}
}
}
} finally {
context.unbind(Globals.IS_SECURITY_ENABLED, oldContextClassLoader);
}
}
if (activityCheck) {
accessCount.set(0 );
}
// Remove this session from our manager's active sessions
manager.remove(this , true );
// Notify interested session event listeners
if (notify) {
fireSessionEvent(SESSION_DESTROYED_EVENT, null );
}
// Call the logout method
if (principal instanceof TomcatPrincipal) {
TomcatPrincipal gp = (TomcatPrincipal) principal;
try {
gp.logout();
} catch (Exception e) {
manager.getContext().getLogger().error(sm.getString("standardSession.logoutfail" ), e);
}
}
// We have completed expire of this session
setValid(false );
expiring = false ;
// Unbind any objects associated with this session
String keys[] = keys();
ClassLoader oldContextClassLoader = null ;
try {
oldContextClassLoader = context.bind(Globals.IS_SECURITY_ENABLED, null );
for (String key : keys) {
removeAttributeInternal(key, notify);
}
} finally {
context.unbind(Globals.IS_SECURITY_ENABLED, oldContextClassLoader);
}
}
}
/**
* Perform the internal processing required to passivate this session .
*/
public void passivate() {
// Notify interested session event listeners
fireSessionEvent(SESSION_PASSIVATED_EVENT, null );
// Notify ActivationListeners
HttpSessionEvent event = null ;
String keys[] = keys();
for (String key : keys) {
Object attribute = attributes.get(key);
if (attribute instanceof HttpSessionActivationListener) {
if (event == null ) {
event = new HttpSessionEvent(getSession());
}
try {
((HttpSessionActivationListener) attribute).sessionWillPassivate(event);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
manager.getContext().getLogger().error(sm.getString("standardSession.attributeEvent" ), t);
}
}
}
}
/**
* Perform internal processing required to activate this session .
*/
public void activate() {
// Initialize access count
if (activityCheck) {
accessCount = new AtomicInteger();
}
// Notify interested session event listeners
fireSessionEvent(SESSION_ACTIVATED_EVENT, null );
// Notify ActivationListeners
HttpSessionEvent event = null ;
String keys[] = keys();
for (String key : keys) {
Object attribute = attributes.get(key);
if (attribute instanceof HttpSessionActivationListener) {
if (event == null ) {
event = new HttpSessionEvent(getSession());
}
try {
((HttpSessionActivationListener) attribute).sessionDidActivate(event);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
manager.getContext().getLogger().error(sm.getString("standardSession.attributeEvent" ), t);
}
}
}
}
/**
* Return the object bound with the specified name to the internal notes for this session , or < code > null < / code > if
* no such binding exists .
*
* @ param name Name of the note to be returned
*/
@Override
public Object getNote(String name) {
return notes.get(name);
}
/**
* Return an Iterator containing the String names of all notes bindings that exist for this session .
*/
@Override
public Iterator<String> getNoteNames() {
return notes.keySet().iterator();
}
/**
* Release all object references , and initialize instance variables , in preparation for reuse of this object .
*/
@Override
public void recycle() {
// Reset the instance variables associated with this Session
attributes.clear();
setAuthType(null );
creationTime = 0 L;
expiring = false ;
id = null ;
lastAccessedTime = 0 L;
maxInactiveInterval = -1 ;
notes.clear();
setPrincipal(null );
isNew = false ;
isValid = false ;
manager = null ;
}
/**
* Remove any object bound to the specified name in the internal notes for this session .
*
* @ param name Name of the note to be removed
*/
@Override
public void removeNote(String name) {
notes.remove(name);
}
/**
* Remove a session event listener from this component .
*/
@Override
public void removeSessionListener(SessionListener listener) {
listeners.remove(listener);
}
/**
* Bind an object to a specified name in the internal notes associated with this session , replacing any existing
* binding for this name .
*
* @ param name Name to which the object should be bound
* @ param value Object to be bound to the specified name
*/
@Override
public void setNote(String name, Object value) {
notes.put(name, value);
}
/**
* Return a string representation of this object .
*/
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("StandardSession[" );
sb.append(id);
sb.append(']' );
return sb.toString();
}
// ------------------------------------------------ Session Package Methods
/**
* Read a serialized version of the contents of this session object from the specified object input stream , without
* requiring that the StandardSession itself have been serialized .
*
* @ param stream The object input stream to read from
*
* @ exception ClassNotFoundException if an unknown class is specified
* @ exception IOException if an input / output error occurs
*/
public void readObjectData(ObjectInputStream stream) throws ClassNotFoundException, IOException {
doReadObject(stream);
}
/**
* Write a serialized version of the contents of this session object to the specified object output stream , without
* requiring that the StandardSession itself have been serialized .
*
* @ param stream The object output stream to write to
*
* @ exception IOException if an input / output error occurs
*/
public void writeObjectData(ObjectOutputStream stream) throws IOException {
doWriteObject(stream);
}
// ------------------------------------------------- HttpSession Properties
/**
* Return the time when this session was created , in milliseconds since midnight , January 1 , 1970 GMT .
*
* @ exception IllegalStateException if this method is called on an invalidated session
*/
@Override
public long getCreationTime() {
if (!isValidInternal()) {
throw new IllegalStateException(sm.getString("standardSession.getCreationTime.ise" ));
}
return this .creationTime;
}
/**
* Return the time when this session was created , in milliseconds since midnight , January 1 , 1970 GMT , bypassing the
* session validation checks .
*/
@Override
public long getCreationTimeInternal() {
return this .creationTime;
}
/**
* Return the ServletContext to which this session belongs .
*/
@Override
public ServletContext getServletContext() {
if (manager == null ) {
return null ;
}
Context context = manager.getContext();
return context.getServletContext();
}
// ----------------------------------------------HttpSession Public Methods
/**
* Return the object bound with the specified name in this session , or < code > null < / code > if no object is bound with
* that name .
*
* @ param name Name of the attribute to be returned
*
* @ exception IllegalStateException if this method is called on an invalidated session
*/
@Override
public Object getAttribute(String name) {
if (!isValidInternal()) {
throw new IllegalStateException(sm.getString("standardSession.getAttribute.ise" ));
}
if (name == null ) {
return null ;
}
return attributes.get(name);
}
/**
* Return an < code > Enumeration < / code > of < code > String < / code > objects containing the names of the objects bound to
* this session .
*
* @ exception IllegalStateException if this method is called on an invalidated session
*/
@Override
public Enumeration<String> getAttributeNames() {
if (!isValidInternal()) {
throw new IllegalStateException(sm.getString("standardSession.getAttributeNames.ise" ));
}
Set<String> names = new HashSet<>(attributes.keySet());
return Collections.enumeration(names);
}
/**
* Invalidates this session and unbinds any objects bound to it .
*
* @ exception IllegalStateException if this method is called on an invalidated session
*/
@Override
public void invalidate() {
if (!isValidInternal()) {
throw new IllegalStateException(sm.getString("standardSession.invalidate.ise" ));
}
// Cause this session to expire
expire();
}
/**
* Return < code > true < / code > if the client does not yet know about the session , or if the client chooses not to join
* the session . For example , if the server used only cookie - based sessions , and the client has disabled the use of
* cookies , then a session would be new on each request .
*
* @ exception IllegalStateException if this method is called on an invalidated session
*/
@Override
public boolean isNew() {
if (!isValidInternal()) {
throw new IllegalStateException(sm.getString("standardSession.isNew.ise" ));
}
return this .isNew;
}
/**
* Remove the object bound with the specified name from this session . If the session does not have an object bound
* with this name , this method does nothing .
* < p >
* After this method executes , and if the object implements < code > HttpSessionBindingListener < / code > , the container
* calls < code > valueUnbound ( ) < / code > on the object .
*
* @ param name Name of the object to remove from this session .
*
* @ exception IllegalStateException if this method is called on an invalidated session
*/
@Override
public void removeAttribute(String name) {
removeAttribute(name, true );
}
/**
* Remove the object bound with the specified name from this session . If the session does not have an object bound
* with this name , this method does nothing .
* < p >
* After this method executes , and if the object implements < code > HttpSessionBindingListener < / code > , the container
* calls < code > valueUnbound ( ) < / code > on the object .
*
* @ param name Name of the object to remove from this session .
* @ param notify Should we notify interested listeners that this attribute is being removed ?
*
* @ exception IllegalStateException if this method is called on an invalidated session
*/
public void removeAttribute(String name, boolean notify) {
// Validate our current state
if (!isValidInternal()) {
throw new IllegalStateException(sm.getString("standardSession.removeAttribute.ise" ));
}
removeAttributeInternal(name, notify);
}
/**
* Bind an object to this session , using the specified name . If an object of the same name is already bound to this
* session , the object is replaced .
* < p >
* After this method executes , and if the object implements < code > HttpSessionBindingListener < / code > , the container
* calls < code > valueBound ( ) < / code > on the object .
*
* @ param name Name to which the object is bound , cannot be null
* @ param value Object to be bound , cannot be null
*
* @ exception IllegalArgumentException if an attempt is made to add a non - serializable object in an environment
* marked distributable .
* @ exception IllegalStateException if this method is called on an invalidated session
*/
@Override
public void setAttribute(String name, Object value) {
setAttribute(name, value, true );
}
/**
* Bind an object to this session , using the specified name . If an object of the same name is already bound to this
* session , the object is replaced .
* < p >
* After this method executes , and if the object implements < code > HttpSessionBindingListener < / code > , the container
* calls < code > valueBound ( ) < / code > on the object .
*
* @ param name Name to which the object is bound , cannot be null
* @ param value Object to be bound , cannot be null
* @ param notify whether to notify session listeners
*
* @ exception IllegalArgumentException if an attempt is made to add a non - serializable object in an environment
* marked distributable .
* @ exception IllegalStateException if this method is called on an invalidated session
*/
public void setAttribute(String name, Object value, boolean notify) {
// Name cannot be null
if (name == null ) {
throw new IllegalArgumentException(sm.getString("standardSession.setAttribute.namenull" ));
}
// Null value is the same as removeAttribute()
if (value == null ) {
removeAttribute(name);
return ;
}
// Validate our current state
if (!isValidInternal()) {
throw new IllegalStateException(sm.getString("standardSession.setAttribute.ise" , getIdInternal()));
}
Context context = manager.getContext();
if (context.getDistributable() && !isAttributeDistributable(name, value) && !exclude(name, value)) {
throw new IllegalArgumentException(sm.getString("standardSession.setAttribute.iae" , name));
}
// Construct an event with the new value
HttpSessionBindingEvent event = null ;
// Call the valueBound() method if necessary
if (notify && value instanceof HttpSessionBindingListener) {
// Don't call any notification if replacing with the same value
// unless configured to do so
Object oldValue = attributes.get(name);
if (value != oldValue || manager.getNotifyBindingListenerOnUnchangedValue()) {
event = new HttpSessionBindingEvent(getSession(), name, value);
try {
((HttpSessionBindingListener) value).valueBound(event);
} catch (Throwable t) {
manager.getContext().getLogger().error(sm.getString("standardSession.bindingEvent" ), t);
}
}
}
// Replace or add this attribute
Object unbound = attributes.put(name, value);
// Call the valueUnbound() method if necessary
if (notify && unbound instanceof HttpSessionBindingListener) {
// Don't call any notification if replacing with the same value
// unless configured to do so
if (unbound != value || manager.getNotifyBindingListenerOnUnchangedValue()) {
try {
((HttpSessionBindingListener) unbound)
.valueUnbound(new HttpSessionBindingEvent(getSession(), name));
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
manager.getContext().getLogger().error(sm.getString("standardSession.bindingEvent" ), t);
}
}
}
if (!notify) {
return ;
}
// Notify interested application event listeners
Object listeners[] = context.getApplicationEventListeners();
if (listeners == null ) {
return ;
}
for (Object o : listeners) {
if (!(o instanceof HttpSessionAttributeListener)) {
continue ;
}
HttpSessionAttributeListener listener = (HttpSessionAttributeListener) o;
try {
if (unbound != null ) {
if (unbound != value || manager.getNotifyAttributeListenerOnUnchangedValue()) {
context.fireContainerEvent("beforeSessionAttributeReplaced" , listener);
if (event == null ) {
event = new HttpSessionBindingEvent(getSession(), name, unbound);
}
listener.attributeReplaced(event);
context.fireContainerEvent("afterSessionAttributeReplaced" , listener);
}
} else {
context.fireContainerEvent("beforeSessionAttributeAdded" , listener);
if (event == null ) {
event = new HttpSessionBindingEvent(getSession(), name, value);
}
listener.attributeAdded(event);
context.fireContainerEvent("afterSessionAttributeAdded" , listener);
}
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
try {
if (unbound != null ) {
if (unbound != value || manager.getNotifyAttributeListenerOnUnchangedValue()) {
context.fireContainerEvent("afterSessionAttributeReplaced" , listener);
}
} else {
context.fireContainerEvent("afterSessionAttributeAdded" , listener);
}
} catch (Exception e) {
// Ignore
}
manager.getContext().getLogger().error(sm.getString("standardSession.attributeEvent" ), t);
}
}
}
// ------------------------------------------ HttpSession Protected Methods
/**
* @ return the < code > isValid < / code > flag for this session without any expiration check .
*/
protected boolean isValidInternal() {
return this .isValid;
}
/**
* { @ inheritDoc }
* < p >
* This implementation simply checks the value for serializability . Sub - classes might use other distribution
* technology not based on serialization and can override this check .
*/
@Override
public boolean isAttributeDistributable(String name, Object value) {
return value instanceof Serializable;
}
/**
* Read a serialized version of this session object from the specified object input stream .
* < p >
* < b > IMPLEMENTATION NOTE < / b > : The reference to the owning Manager is not restored by this method , and must be set
* explicitly .
*
* @ param stream The input stream to read from
*
* @ exception ClassNotFoundException if an unknown class is specified
* @ exception IOException if an input / output error occurs
*/
protected void doReadObject(ObjectInputStream stream) throws ClassNotFoundException, IOException {
// Deserialize the scalar instance variables (except Manager)
authType = null ; // Transient (may be set later)
creationTime = ((Long ) stream.readObject()).longValue();
lastAccessedTime = ((Long ) stream.readObject()).longValue();
maxInactiveInterval = ((Integer) stream.readObject()).intValue();
isNew = ((Boolean ) stream.readObject()).booleanValue();
isValid = ((Boolean ) stream.readObject()).booleanValue();
thisAccessedTime = ((Long ) stream.readObject()).longValue();
principal = null ; // Transient (may be set later)
// setId((String) stream.readObject());
id = (String) stream.readObject();
if (manager.getContext().getLogger().isDebugEnabled()) {
manager.getContext().getLogger().debug("readObject() loading session " + id);
}
if (notes == null ) {
notes = new ConcurrentHashMap<>();
}
/*
* The next object read could either be the number of attributes ( Integer ) or if authentication information is
* persisted then : - authType ( String ) - always present - Principal object - always present - expected session
* ID - present if BZ 66120 is fixed - saved request - present if BZ 66120 is fixed
*
* Note : Some , all or none of the above objects may be null
*/
Object nextObject = stream.readObject();
if (!(nextObject instanceof Integer)) {
// Not an Integer so the next two objects will be authType and
// Principal
setAuthType((String) nextObject);
try {
setPrincipal((Principal) stream.readObject());
} catch (ClassNotFoundException | ObjectStreamException e) {
String msg = sm.getString("standardSession.principalNotDeserializable" , id);
if (manager.getContext().getLogger().isDebugEnabled()) {
manager.getContext().getLogger().debug(msg, e);
} else {
manager.getContext().getLogger().warn(msg);
}
throw e;
}
nextObject = stream.readObject();
if (!(nextObject instanceof Integer)) {
// Not an Integer so the next two objects will be
// 'expected session ID' and 'saved request'
if (nextObject != null ) {
notes.put(org.apache.catalina.authenticator.Constants.SESSION_ID_NOTE, nextObject);
}
nextObject = stream.readObject();
if (nextObject != null ) {
notes.put(org.apache.catalina.authenticator.Constants.FORM_REQUEST_NOTE, nextObject);
}
// Next object will be the number of attributes
nextObject = stream.readObject();
}
}
// Deserialize the attribute count and attribute values
if (attributes == null ) {
attributes = new ConcurrentHashMap<>();
}
int n = ((Integer) nextObject).intValue();
boolean isValidSave = isValid;
isValid = true ;
for (int i = 0 ; i < n; i++) {
String name = (String) stream.readObject();
final Object value;
try {
value = stream.readObject();
} catch (WriteAbortedException wae) {
if (wae.getCause() instanceof NotSerializableException) {
String msg = sm.getString("standardSession.notDeserializable" , name, id);
if (manager.getContext().getLogger().isDebugEnabled()) {
manager.getContext().getLogger().debug(msg, wae);
} else {
manager.getContext().getLogger().warn(msg);
}
// Skip non serializable attributes
continue ;
}
throw wae;
}
if (manager.getContext().getLogger().isDebugEnabled()) {
manager.getContext().getLogger().debug(" loading attribute '" + name + "' with value '" + value + "'" );
}
// Handle the case where the filter configuration was changed while
// the web application was stopped.
if (exclude(name, value)) {
continue ;
}
// ConcurrentHashMap does not allow null keys or values
if (null != value) {
attributes.put(name, value);
}
}
isValid = isValidSave;
if (listeners == null ) {
listeners = new ArrayList<>();
}
}
/**
* Write a serialized version of this session object to the specified object output stream .
* < p >
* < b > IMPLEMENTATION NOTE < / b > : The owning Manager will not be stored in the serialized representation of this
* Session . After calling < code > readObject ( ) < / code > , you must set the associated Manager explicitly .
* < p >
* < b > IMPLEMENTATION NOTE < / b > : Any attribute that is not Serializable will be unbound from the session , with
* appropriate actions if it implements HttpSessionBindingListener . If you do not want any such attributes , be sure
* the < code > distributable < / code > property of the associated Manager is set to < code > true < / code > .
*
* @ param stream The output stream to write to
*
* @ exception IOException if an input / output error occurs
*/
protected void doWriteObject(ObjectOutputStream stream) throws IOException {
// Write the scalar instance variables (except Manager)
stream.writeObject(Long .valueOf(creationTime));
stream.writeObject(Long .valueOf(lastAccessedTime));
stream.writeObject(Integer.valueOf(maxInactiveInterval));
stream.writeObject(Boolean .valueOf(isNew));
stream.writeObject(Boolean .valueOf(isValid));
stream.writeObject(Long .valueOf(thisAccessedTime));
stream.writeObject(id);
if (manager.getContext().getLogger().isDebugEnabled()) {
manager.getContext().getLogger().debug("writeObject() storing session " + id);
}
// Gather authentication information (if configured)
String sessionAuthType = null ;
Principal sessionPrincipal = null ;
String expectedSessionId = null ;
SavedRequest savedRequest = null ;
if (getPersistAuthentication()) {
sessionAuthType = getAuthType();
sessionPrincipal = getPrincipal();
if (sessionPrincipal != null && !(sessionPrincipal instanceof Serializable)) {
sessionPrincipal = null ;
manager.getContext().getLogger().warn(sm.getString("standardSession.principalNotSerializable" , id));
}
expectedSessionId = (String) notes.get(org.apache.catalina.authenticator.Constants.SESSION_ID_NOTE);
savedRequest = (SavedRequest) notes.get(org.apache.catalina.authenticator.Constants.FORM_REQUEST_NOTE);
}
// Write authentication information (may be null values)
stream.writeObject(sessionAuthType);
try {
stream.writeObject(sessionPrincipal);
} catch (NotSerializableException e) {
manager.getContext().getLogger().warn(sm.getString("standardSession.principalNotSerializable" , id), e);
}
stream.writeObject(expectedSessionId);
stream.writeObject(savedRequest);
// Accumulate the names of serializable and non-serializable attributes
String keys[] = keys();
List<String> saveNames = new ArrayList<>();
List<Object> saveValues = new ArrayList<>();
for (String key : keys) {
Object value = attributes.get(key);
if (value == null ) {
continue ;
} else if (isAttributeDistributable(key, value) && !exclude(key, value)) {
saveNames.add(key);
saveValues.add(value);
} else {
removeAttributeInternal(key, true );
}
}
// Serialize the attribute count and the Serializable attributes
int n = saveNames.size();
stream.writeObject(Integer.valueOf(n));
for (int i = 0 ; i < n; i++) {
stream.writeObject(saveNames.get(i));
try {
stream.writeObject(saveValues.get(i));
if (manager.getContext().getLogger().isDebugEnabled()) {
manager.getContext().getLogger().debug(
" storing attribute '" + saveNames.get(i) + "' with value '" + saveValues.get(i) + "'" );
}
} catch (NotSerializableException e) {
manager.getContext().getLogger()
.warn(sm.getString("standardSession.notSerializable" , saveNames.get(i), id), e);
}
}
}
/**
* Return whether authentication information shall be persisted or not .
*
* @ return { @ code true } , if authentication information shall be persisted ; { @ code false } otherwise
*/
private boolean getPersistAuthentication() {
if (manager instanceof ManagerBase) {
return ((ManagerBase) manager).getPersistAuthentication();
}
return false ;
}
/**
* Should the given session attribute be excluded ? This implementation checks :
* < ul >
* < li > { @ link Constants # excludedAttributeNames } < / li >
* < li > { @ link Manager # willAttributeDistribute ( String , Object ) } < / li >
* < / ul >
* Note : This method deliberately does not check { @ link # isAttributeDistributable ( String , Object ) } which is kept
* separate to support the checks required in { @ link # setAttribute ( String , Object , boolean ) }
*
* @ param name The attribute name
* @ param value The attribute value
*
* @ return { @ code true } if the attribute should be excluded from distribution , otherwise { @ code false }
*/
protected boolean exclude(String name, Object value) {
if (Constants.excludedAttributeNames.contains(name)) {
return true ;
}
// Manager is required for remaining check
Manager manager = getManager();
if (manager == null ) {
// Manager may be null during replication of new sessions in a
// cluster. Avoid the NPE.
return false ;
}
// Last check so use a short-cut
return !manager.willAttributeDistribute(name, value);
}
// ------------------------------------------------------ Protected Methods
/**
* Notify all session event listeners that a particular event has occurred for this Session . The default
* implementation performs this notification synchronously using the calling thread .
*
* @ param type Event type
* @ param data Event data
*/
public void fireSessionEvent(String type, Object data) {
if (listeners.size() < 1 ) {
return ;
}
SessionEvent event = new SessionEvent(this , type, data);
SessionListener list[] = new SessionListener[0 ];
synchronized (listeners) {
list = listeners.toArray(list);
}
for (SessionListener sessionListener : list) {
sessionListener.sessionEvent(event);
}
}
/**
* @ return the names of all currently defined session attributes as an array of Strings . If there are no defined
* attributes , a zero - length array is returned .
*/
protected String[] keys() {
return attributes.keySet().toArray(EMPTY_ARRAY);
}
/**
* Remove the object bound with the specified name from this session . If the session does not have an object bound
* with this name , this method does nothing .
* < p >
* After this method executes , and if the object implements < code > HttpSessionBindingListener < / code > , the container
* calls < code > valueUnbound ( ) < / code > on the object .
*
* @ param name Name of the object to remove from this session .
* @ param notify Should we notify interested listeners that this attribute is being removed ?
*/
protected void removeAttributeInternal(String name, boolean notify) {
// Avoid NPE
if (name == null ) {
return ;
}
// Remove this attribute from our collection
Object value = attributes.remove(name);
// Do we need to do valueUnbound() and attributeRemoved() notification?
if (!notify || (value == null )) {
return ;
}
// Call the valueUnbound() method if necessary
HttpSessionBindingEvent event = null ;
if (value instanceof HttpSessionBindingListener) {
event = new HttpSessionBindingEvent(getSession(), name, value);
((HttpSessionBindingListener) value).valueUnbound(event);
}
// Notify interested application event listeners
Context context = manager.getContext();
Object listeners[] = context.getApplicationEventListeners();
if (listeners == null ) {
return ;
}
for (Object o : listeners) {
if (!(o instanceof HttpSessionAttributeListener)) {
continue ;
}
HttpSessionAttributeListener listener = (HttpSessionAttributeListener) o;
try {
context.fireContainerEvent("beforeSessionAttributeRemoved" , listener);
if (event == null ) {
event = new HttpSessionBindingEvent(getSession(), name, value);
}
listener.attributeRemoved(event);
context.fireContainerEvent("afterSessionAttributeRemoved" , listener);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
try {
context.fireContainerEvent("afterSessionAttributeRemoved" , listener);
} catch (Exception e) {
// Ignore
}
manager.getContext().getLogger().error(sm.getString("standardSession.attributeEvent" ), t);
}
}
}
private static class PrivilegedNewSessionFacade implements PrivilegedAction<StandardSessionFacade> {
private final HttpSession session;
PrivilegedNewSessionFacade(HttpSession session) {
this .session = session;
}
@Override
public StandardSessionFacade run() {
return new StandardSessionFacade(session);
}
}
}
Messung V0.5 in Prozent C=93 H=92 G=92
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