org.apache.catalina.session.StandardSession Maven / Gradle / Ivy
/*
* 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.Serializable;
import java.security.AccessController;
import java.security.Principal;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionActivationListener;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
import javax.servlet.http.HttpSessionEvent;
import javax.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.core.StandardContext;
import org.apache.catalina.realm.GenericPrincipal;
import org.apache.catalina.security.SecurityUtil;
import org.apache.catalina.util.Enumerator;
import org.apache.tomcat.util.ExceptionUtils;
import org.apache.tomcat.util.res.StringManager;
/**
* Standard implementation of the Session interface. This object is
* serializable, so that it can be stored in persistent storage or transferred
* to a different JVM for distributable session support.
*
* IMPLEMENTATION NOTE: 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 org.apache.catalina.session package cannot cast an
* HttpSession view of this instance back to a Session view.
*
* IMPLEMENTATION NOTE: 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 Jon S. Stevens
* @version $Id: StandardSession.java 1059588 2011-01-16 15:49:50Z markt $
*/
public class StandardSession implements HttpSession, Session, Serializable {
private static final long serialVersionUID = 1L;
protected static final boolean STRICT_SERVLET_COMPLIANCE;
protected static final boolean ACTIVITY_CHECK;
protected static final boolean LAST_ACCESS_AT_START;
static {
STRICT_SERVLET_COMPLIANCE = Globals.STRICT_SERVLET_COMPLIANCE;
String activityCheck = System.getProperty(
"org.apache.catalina.session.StandardSession.ACTIVITY_CHECK");
if (activityCheck == null) {
ACTIVITY_CHECK = STRICT_SERVLET_COMPLIANCE;
} else {
ACTIVITY_CHECK =
Boolean.valueOf(activityCheck).booleanValue();
}
String lastAccessAtStart = System.getProperty(
"org.apache.catalina.session.StandardSession.LAST_ACCESS_AT_START");
if (lastAccessAtStart == null) {
LAST_ACCESS_AT_START = STRICT_SERVLET_COMPLIANCE;
} else {
LAST_ACCESS_AT_START =
Boolean.valueOf(lastAccessAtStart).booleanValue();
}
}
// ----------------------------------------------------------- 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;
// Initialize access count
if (ACTIVITY_CHECK) {
accessCount = new AtomicInteger();
}
}
// ----------------------------------------------------- Instance Variables
/**
* Type array.
*/
protected static final String EMPTY_ARRAY[] = new String[0];
/**
* The dummy attribute value serialized when a NotSerializableException is
* encountered in writeObject().
*/
protected static final String NOT_SERIALIZED =
"___NOT_SERIALIZABLE_EXCEPTION___";
/**
* The collection of user data attributes associated with this Session.
*/
protected Map 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 = 0L;
/**
* Set of attribute names which are not allowed to be persisted.
*/
protected static final String[] excludedAttributes = {
Globals.SUBJECT_ATTR
};
/**
* 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;
/**
* Descriptive information describing this Session implementation.
*/
protected static final String info = "StandardSession/1.0";
/**
* The last accessed time for this Session.
*/
protected volatile long lastAccessedTime = creationTime;
/**
* The session event listeners for this Session.
*/
protected transient ArrayList 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 int maxInactiveInterval = -1;
/**
* Flag indicating whether this session is new or not.
*/
protected 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. IMPLEMENTATION NOTE: This object is
* not saved and restored across session serializations!
*/
protected transient Map notes = new Hashtable();
/**
* The authenticated Principal associated with this session, if any.
* IMPLEMENTATION NOTE: This object is not saved and
* restored across session serializations!
*/
protected transient Principal principal = null;
/**
* The string manager for this package.
*/
protected static final StringManager sm =
StringManager.getManager(Constants.Package);
/**
* The HTTP session context associated with this session.
*/
@Deprecated
protected static volatile
javax.servlet.http.HttpSessionContext sessionContext = null;
/**
* The property change support for this component. NOTE: This value
* is not included in the serialized version of this object.
*/
protected 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;
// ----------------------------------------------------- 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) {
if ((this.id != null) && (manager != null))
manager.remove(this);
this.id = id;
if (manager != null)
manager.add(this);
tellNew();
}
/**
* Inform the listeners about the new session.
*
*/
public void tellNew() {
// Notify interested session event listeners
fireSessionEvent(Session.SESSION_CREATED_EVENT, null);
// Notify interested application event listeners
Context context = (Context) manager.getContainer();
Object listeners[] = context.getApplicationLifecycleListeners();
if (listeners != null) {
HttpSessionEvent event =
new HttpSessionEvent(getSession());
for (int i = 0; i < listeners.length; i++) {
if (!(listeners[i] instanceof HttpSessionListener))
continue;
HttpSessionListener listener =
(HttpSessionListener) listeners[i];
try {
fireContainerEvent(context,
"beforeSessionCreated",
listener);
listener.sessionCreated(event);
fireContainerEvent(context,
"afterSessionCreated",
listener);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
try {
fireContainerEvent(context,
"afterSessionCreated",
listener);
} catch (Exception e) {
// Ignore
}
manager.getContainer().getLogger().error
(sm.getString("standardSession.sessionEvent"), t);
}
}
}
}
/**
* Return descriptive information about this Session implementation and
* the corresponding version number, in the format
* <description>/<version>.
*/
@Override
public String getInfo() {
return (info);
}
/**
* 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 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 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;
if (isValid && interval == 0) {
expire();
}
}
/**
* Set the isNew flag for this session.
*
* @param isNew The new value for the isNew flag
*/
@Override
public void setNew(boolean isNew) {
this.isNew = isNew;
}
/**
* Return the authenticated Principal that is associated with this Session.
* This provides an Authenticator with a means to cache a
* previously authenticated Principal, and avoid potentially expensive
* Realm.authenticate() calls on every request. If there
* is no current associated Principal, return null.
*/
@Override
public Principal getPrincipal() {
return (this.principal);
}
/**
* Set the authenticated Principal that is associated with this Session.
* This provides an Authenticator with a means to cache a
* previously authenticated Principal, and avoid potentially expensive
* Realm.authenticate() calls on every request.
*
* @param principal The new Principal, or null if none
*/
@Override
public void setPrincipal(Principal principal) {
Principal oldPrincipal = this.principal;
this.principal = principal;
support.firePropertyChange("principal", oldPrincipal, this.principal);
}
/**
* Return the HttpSession for which this object
* is the facade.
*/
@Override
public HttpSession getSession() {
if (facade == null){
if (SecurityUtil.isPackageProtectionEnabled()){
final StandardSession fsession = this;
facade = AccessController.doPrivileged(
new PrivilegedAction(){
@Override
public StandardSessionFacade run(){
return new StandardSessionFacade(fsession);
}
});
} else {
facade = new StandardSessionFacade(this);
}
}
return (facade);
}
/**
* Return the isValid flag for this session.
*/
@Override
public boolean isValid() {
if (this.expiring) {
return true;
}
if (!this.isValid) {
return false;
}
if (ACTIVITY_CHECK && accessCount.get() > 0) {
return true;
}
if (maxInactiveInterval >= 0) {
long timeNow = System.currentTimeMillis();
int timeIdle;
if (LAST_ACCESS_AT_START) {
timeIdle = (int) ((timeNow - lastAccessedTime) / 1000L);
} else {
timeIdle = (int) ((timeNow - thisAccessedTime) / 1000L);
}
if (timeIdle >= maxInactiveInterval) {
expire(true);
}
}
return (this.isValid);
}
/**
* Set the isValid flag for this session.
*
* @param isValid The new value for the isValid 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 (ACTIVITY_CHECK) {
accessCount.incrementAndGet();
}
}
/**
* End the access.
*/
@Override
public void endAccess() {
isNew = false;
/**
* The servlet spec mandates to ignore request handling time
* in lastAccessedTime.
*/
if (LAST_ACCESS_AT_START) {
this.lastAccessedTime = this.thisAccessedTime;
this.thisAccessedTime = System.currentTimeMillis();
} else {
this.thisAccessedTime = System.currentTimeMillis();
this.lastAccessedTime = this.thisAccessedTime;
}
if (ACTIVITY_CHECK) {
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 expire is in progress or has previously been called
if (expiring || !isValid)
return;
synchronized (this) {
// Check again, now we are inside the sync so this code only runs once
// Double check locking - expiring and isValid need to be volatile
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 = (Context) manager.getContainer();
// 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
ClassLoader oldTccl = null;
if (context.getLoader() != null &&
context.getLoader().getClassLoader() != null) {
oldTccl = Thread.currentThread().getContextClassLoader();
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction pa = new PrivilegedSetTccl(
context.getLoader().getClassLoader());
AccessController.doPrivileged(pa);
} else {
Thread.currentThread().setContextClassLoader(
context.getLoader().getClassLoader());
}
}
try {
Object listeners[] = context.getApplicationLifecycleListeners();
if (notify && (listeners != null)) {
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 {
fireContainerEvent(context,
"beforeSessionDestroyed",
listener);
listener.sessionDestroyed(event);
fireContainerEvent(context,
"afterSessionDestroyed",
listener);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
try {
fireContainerEvent(context,
"afterSessionDestroyed",
listener);
} catch (Exception e) {
// Ignore
}
manager.getContainer().getLogger().error
(sm.getString("standardSession.sessionEvent"), t);
}
}
}
} finally {
if (oldTccl != null) {
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction pa =
new PrivilegedSetTccl(oldTccl);
AccessController.doPrivileged(pa);
} else {
Thread.currentThread().setContextClassLoader(oldTccl);
}
}
}
if (ACTIVITY_CHECK) {
accessCount.set(0);
}
setValid(false);
// Remove this session from our manager's active sessions
manager.remove(this, true);
// Notify interested session event listeners
if (notify) {
fireSessionEvent(Session.SESSION_DESTROYED_EVENT, null);
}
// Call the logout method
if (principal instanceof GenericPrincipal) {
GenericPrincipal gp = (GenericPrincipal) principal;
try {
gp.logout();
} catch (Exception e) {
manager.getContainer().getLogger().error(
sm.getString("standardSession.logoutfail"),
e);
}
}
// We have completed expire of this session
expiring = false;
// Unbind any objects associated with this session
String keys[] = keys();
for (int i = 0; i < keys.length; i++)
removeAttributeInternal(keys[i], notify);
}
}
/**
* Perform the internal processing required to passivate
* this session.
*/
public void passivate() {
// Notify interested session event listeners
fireSessionEvent(Session.SESSION_PASSIVATED_EVENT, null);
// Notify ActivationListeners
HttpSessionEvent event = null;
String keys[] = keys();
for (int i = 0; i < keys.length; i++) {
Object attribute = attributes.get(keys[i]);
if (attribute instanceof HttpSessionActivationListener) {
if (event == null)
event = new HttpSessionEvent(getSession());
try {
((HttpSessionActivationListener)attribute)
.sessionWillPassivate(event);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
manager.getContainer().getLogger().error
(sm.getString("standardSession.attributeEvent"), t);
}
}
}
}
/**
* Perform internal processing required to activate this
* session.
*/
public void activate() {
// Initialize access count
if (ACTIVITY_CHECK) {
accessCount = new AtomicInteger();
}
// Notify interested session event listeners
fireSessionEvent(Session.SESSION_ACTIVATED_EVENT, null);
// Notify ActivationListeners
HttpSessionEvent event = null;
String keys[] = keys();
for (int i = 0; i < keys.length; i++) {
Object attribute = attributes.get(keys[i]);
if (attribute instanceof HttpSessionActivationListener) {
if (event == null)
event = new HttpSessionEvent(getSession());
try {
((HttpSessionActivationListener)attribute)
.sessionDidActivate(event);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
manager.getContainer().getLogger().error
(sm.getString("standardSession.attributeEvent"), t);
}
}
}
}
/**
* Return the object bound with the specified name to the internal notes
* for this session, or null 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 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 = 0L;
expiring = false;
id = null;
lastAccessedTime = 0L;
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 {
readObject(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 {
writeObject(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 = (Context) manager.getContainer();
if (context == null)
return (null);
else
return (context.getServletContext());
}
/**
* Return the session context with which this session is associated.
*
* @deprecated As of Version 2.1, this method is deprecated and has no
* replacement. It will be removed in a future version of the
* Java Servlet API.
*/
@Override
@Deprecated
public javax.servlet.http.HttpSessionContext getSessionContext() {
if (sessionContext == null)
sessionContext = new StandardSessionContext();
return (sessionContext);
}
// ----------------------------------------------HttpSession Public Methods
/**
* Return the object bound with the specified name in this session, or
* null 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 Enumeration of String 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 getAttributeNames() {
if (!isValidInternal())
throw new IllegalStateException
(sm.getString("standardSession.getAttributeNames.ise"));
return (new Enumerator(attributes.keySet(), true));
}
/**
* Return the object bound with the specified name in this session, or
* null if no object is bound with that name.
*
* @param name Name of the value to be returned
*
* @exception IllegalStateException if this method is called on an
* invalidated session
*
* @deprecated As of Version 2.2, this method is replaced by
* getAttribute()
*/
@Override
@Deprecated
public Object getValue(String name) {
return (getAttribute(name));
}
/**
* Return the set of names of objects bound to this session. If there
* are no such objects, a zero-length array is returned.
*
* @exception IllegalStateException if this method is called on an
* invalidated session
*
* @deprecated As of Version 2.2, this method is replaced by
* getAttributeNames()
*/
@Override
@Deprecated
public String[] getValueNames() {
if (!isValidInternal())
throw new IllegalStateException
(sm.getString("standardSession.getValueNames.ise"));
return (keys());
}
/**
* 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 true 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);
}
/**
* 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.
*
* After this method executes, and if the object implements
* HttpSessionBindingListener, the container calls
* valueBound() 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 IllegalStateException if this method is called on an
* invalidated session
*
* @deprecated As of Version 2.2, this method is replaced by
* setAttribute()
*/
@Override
@Deprecated
public void putValue(String name, Object value) {
setAttribute(name, value);
}
/**
* 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.
*
* After this method executes, and if the object implements
* HttpSessionBindingListener, the container calls
* valueUnbound() 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.
*
* After this method executes, and if the object implements
* HttpSessionBindingListener, the container calls
* valueUnbound() 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);
}
/**
* 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.
*
* After this method executes, and if the object implements
* HttpSessionBindingListener, the container calls
* valueUnbound() 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
*
* @deprecated As of Version 2.2, this method is replaced by
* removeAttribute()
*/
@Override
@Deprecated
public void removeValue(String name) {
removeAttribute(name);
}
/**
* 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.
*
* After this method executes, and if the object implements
* HttpSessionBindingListener, the container calls
* valueBound() 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.
*
* After this method executes, and if the object implements
* HttpSessionBindingListener, the container calls
* valueBound() 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()));
if ((manager != null) && manager.getDistributable() &&
!(value instanceof Serializable))
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
Object oldValue = attributes.get(name);
if (value != oldValue) {
event = new HttpSessionBindingEvent(getSession(), name, value);
try {
((HttpSessionBindingListener) value).valueBound(event);
} catch (Throwable t){
manager.getContainer().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 != null) && (unbound != value) &&
(unbound instanceof HttpSessionBindingListener)) {
try {
((HttpSessionBindingListener) unbound).valueUnbound
(new HttpSessionBindingEvent(getSession(), name));
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
manager.getContainer().getLogger().error
(sm.getString("standardSession.bindingEvent"), t);
}
}
if ( !notify ) return;
// Notify interested application event listeners
Context context = (Context) manager.getContainer();
Object listeners[] = context.getApplicationEventListeners();
if (listeners == null)
return;
for (int i = 0; i < listeners.length; i++) {
if (!(listeners[i] instanceof HttpSessionAttributeListener))
continue;
HttpSessionAttributeListener listener =
(HttpSessionAttributeListener) listeners[i];
try {
if (unbound != null) {
fireContainerEvent(context,
"beforeSessionAttributeReplaced",
listener);
if (event == null) {
event = new HttpSessionBindingEvent
(getSession(), name, unbound);
}
listener.attributeReplaced(event);
fireContainerEvent(context,
"afterSessionAttributeReplaced",
listener);
} else {
fireContainerEvent(context,
"beforeSessionAttributeAdded",
listener);
if (event == null) {
event = new HttpSessionBindingEvent
(getSession(), name, value);
}
listener.attributeAdded(event);
fireContainerEvent(context,
"afterSessionAttributeAdded",
listener);
}
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
try {
if (unbound != null) {
fireContainerEvent(context,
"afterSessionAttributeReplaced",
listener);
} else {
fireContainerEvent(context,
"afterSessionAttributeAdded",
listener);
}
} catch (Exception e) {
// Ignore
}
manager.getContainer().getLogger().error
(sm.getString("standardSession.attributeEvent"), t);
}
}
}
// ------------------------------------------ HttpSession Protected Methods
/**
* Return the isValid flag for this session without any expiration
* check.
*/
protected boolean isValidInternal() {
return (this.isValid || this.expiring);
}
/**
* Read a serialized version of this session object from the specified
* object input stream.
*
* IMPLEMENTATION NOTE: 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 readObject(ObjectInputStream stream)
throws ClassNotFoundException, IOException {
// Deserialize the scalar instance variables (except Manager)
authType = null; // Transient only
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 only
// setId((String) stream.readObject());
id = (String) stream.readObject();
if (manager.getContainer().getLogger().isDebugEnabled())
manager.getContainer().getLogger().debug
("readObject() loading session " + id);
// Deserialize the attribute count and attribute values
if (attributes == null)
attributes = new Hashtable();
int n = ((Integer) stream.readObject()).intValue();
boolean isValidSave = isValid;
isValid = true;
for (int i = 0; i < n; i++) {
String name = (String) stream.readObject();
Object value = stream.readObject();
if ((value instanceof String) && (value.equals(NOT_SERIALIZED)))
continue;
if (manager.getContainer().getLogger().isDebugEnabled())
manager.getContainer().getLogger().debug(" loading attribute '" + name +
"' with value '" + value + "'");
attributes.put(name, value);
}
isValid = isValidSave;
if (listeners == null) {
listeners = new ArrayList();
}
if (notes == null) {
notes = new Hashtable();
}
}
/**
* Write a serialized version of this session object to the specified
* object output stream.
*
* IMPLEMENTATION NOTE: The owning Manager will not be stored
* in the serialized representation of this Session. After calling
* readObject(), you must set the associated Manager
* explicitly.
*
* IMPLEMENTATION NOTE: 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 distributable property of the
* associated Manager is set to true.
*
* @param stream The output stream to write to
*
* @exception IOException if an input/output error occurs
*/
protected void writeObject(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.getContainer().getLogger().isDebugEnabled())
manager.getContainer().getLogger().debug
("writeObject() storing session " + id);
// Accumulate the names of serializable and non-serializable attributes
String keys[] = keys();
ArrayList saveNames = new ArrayList();
ArrayList