/*
* Copyright 1999,2004 The Apache Software Foundation.
*
* Licensed 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.cluster.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.lang.reflect.Method;
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.Iterator;
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.HttpSessionContext;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
import org.apache.catalina.Context;
import org.apache.catalina.Manager;
import org.apache.catalina.Session;
import org.apache.catalina.SessionEvent;
import org.apache.catalina.SessionListener;
import org.apache.catalina.util.Enumerator;
import org.apache.catalina.util.StringManager;
import org.apache.catalina.session.ManagerBase;
import org.apache.catalina.session.Constants;
import org.apache.catalina.cluster.ClusterSession;
import org.apache.catalina.realm.GenericPrincipal;
/**
*
* Similar to the StandardSession, this code is identical, but for update
* and some small issues, simply copied in the first release.
* This session will keep track of deltas during a request.
* <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 Filip Hanik
* @author Craig R. McClanahan
* @author Sean Legassick
* @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
* @version $Revision: 1.19 $ $Date: 2004/02/27 14:58:56 $
*/
public class DeltaSession
implements HttpSession, Session, Serializable,
ClusterSession {
public static org.apache.commons.logging.Log log =
org.apache.commons.logging.LogFactory.getLog( DeltaManager.class );
// ----------------------------------------------------------- Constructors
/**
* Construct a new Session associated with the specified Manager.
*
* @param manager The manager with which this Session is associated
*/
public DeltaSession(Manager manager) {
super();
this.manager = manager;
if (manager instanceof ManagerBase)
this.debug = ((ManagerBase) manager).getDebug();
}
// ----------------------------------------------------- Instance Variables
/**
* The dummy attribute value serialized when a NotSerializableException is
* encountered in <code>writeObject()</code>.
*/
private static final String NOT_SERIALIZED =
"___NOT_SERIALIZABLE_EXCEPTION___";
/**
* The collection of user data attributes associated with this Session.
*/
private HashMap attributes = new HashMap();
/**
* The authentication type used to authenticate our cached Principal,
* if any. NOTE: This value is not included in the serialized
* version of this object.
*/
private transient String authType = null;
/**
* The <code>java.lang.Method</code> for the
* <code>fireContainerEvent()</code> method of the
* <code>org.apache.catalina.core.StandardContext</code> method,
* if our Context implementation is of this class. This value is
* computed dynamically the first time it is needed, or after
* a session reload (since it is declared transient).
*/
private transient Method containerEventMethod = null;
/**
* The method signature for the <code>fireContainerEvent</code> method.
*/
private static final Class containerEventTypes[] =
{ String.class, Object.class };
/**
* The time this session was created, in milliseconds since midnight,
* January 1, 1970 GMT.
*/
private long creationTime = 0L;
/**
* The debugging detail level for this component. NOTE: This value
* is not included in the serialized version of this object.
*/
private transient int debug = 0;
/**
* 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.
*/
private transient boolean expiring = false;
/**
* The facade associated with this session. NOTE: This value is not
* included in the serialized version of this object.
*/
private transient DeltaSessionFacade facade = null;
/**
* The session identifier of this Session.
*/
private String id = null;
/**
* Descriptive information describing this Session implementation.
*/
private static final String info = "DeltaSession/1.0";
/**
* The last accessed time for this Session.
*/
private long lastAccessedTime = creationTime;
/**
* The session event listeners for this Session.
*/
private transient ArrayList listeners = new ArrayList();
/**
* The Manager with which this Session is associated.
*/
private 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.
*/
private int maxInactiveInterval = -1;
/**
* Flag indicating whether this session is new or not.
*/
private boolean isNew = false;
/**
* Flag indicating whether this session is valid or not.
*/
private 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!
*/
private transient HashMap notes = new HashMap();
/**
* 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!
*/
private transient Principal principal = null;
/**
* The string manager for this package.
*/
private static StringManager sm =
StringManager.getManager(Constants.Package);
/**
* The HTTP session context associated with this session.
*/
private static HttpSessionContext sessionContext = null;
/**
* The property change support for this component. NOTE: This value
* is not included in the serialized version of this object.
*/
private transient PropertyChangeSupport support =
new PropertyChangeSupport(this);
/**
* The current accessed time for this session.
*/
private long thisAccessedTime = creationTime;
/**
* only the primary session will expire, or be able to
* expire due to inactivity. This is set to false
* as soon as I receive this session over the wire in
* a session message. That means that someone else has
* made a request on another server.
*/
private transient boolean isPrimarySession = true;
/**
* The delta request contains all the action info
*
*/
private transient DeltaRequest deltaRequest = null;
/**
* Last time the session was replicatd, used for distributed
* expiring of session
*/
private transient long lastTimeReplicated = System.currentTimeMillis();
/**
* The access count for this session
*/
protected transient int accessCount = 1;
// ----------------------------------------------------- Session Properties
/**
* returns true if this session is the primary session, if that is the
* case, the manager can expire it upon timeout.
* @return
*/
public boolean isPrimarySession() {
return isPrimarySession;
}
/**
* Sets whether this is the primary session or not.
* @param primarySession
*/
public void setPrimarySession(boolean primarySession) {
this.isPrimarySession=primarySession;
}
/**
* Return the authentication type used to authenticate our cached
* Principal, if any.
*/
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
*/
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
*/
public void setCreationTime(long time) {
this.creationTime = time;
this.lastAccessedTime = time;
this.thisAccessedTime = time;
}
/**
* Return the session identifier for this session.
*/
public String getId() {
return (this.id);
}
/**
* Set the session identifier for this session.
*
* @param id The new session identifier
*/
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) {
try {
fireContainerEvent(context,
"afterSessionCreated",
listener);
} catch (Exception e) {
;
}
// FIXME - should we do anything besides log these?
log.error(sm.getString("standardSession.sessionEvent"), t);
}
}
}
}
/**
* Return descriptive information about this Session implementation and
* the corresponding version number, in the format
* <code><description>/<version></code>.
*/
public String getInfo() {
return (this.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.
*/
public long getLastAccessedTime() {
if ( !isValid ) {
throw new IllegalStateException(
sm.getString("standardSession.getLastAccessedTime"));
}
return (this.lastAccessedTime);
}
/**
* Return the Manager within which this Session is valid.
*/
public Manager getManager() {
return (this.manager);
}
/**
* Set the Manager within which this Session is valid.
*
* @param manager The new Manager
*/
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.
*/
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
*/
public void setMaxInactiveInterval(int interval) {
setMaxInactiveInterval(interval,true);
}
public void setMaxInactiveInterval(int interval, boolean addDeltaRequest) {
this.maxInactiveInterval = interval;
if (isValid && interval == 0) {
expire();
} else {
if ( addDeltaRequest && (deltaRequest!=null) ) deltaRequest.setMaxInactiveInterval(interval);
}
}
/**
* Set the <code>isNew</code> flag for this session.
*
* @param isNew The new value for the <code>isNew</code> flag
*/
public void setNew(boolean isNew) {
setNew(isNew,true);
}
public void setNew(boolean isNew, boolean addDeltaRequest) {
this.isNew = isNew;
if (addDeltaRequest && (deltaRequest!=null)) deltaRequest.setNew(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>.
*/
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
*/
public void setPrincipal(Principal principal) {
setPrincipal(principal,true);
}
public void setPrincipal(Principal principal,boolean addDeltaRequest) {
Principal oldPrincipal = this.principal;
this.principal = principal;
support.firePropertyChange("principal", oldPrincipal, this.principal);
if (addDeltaRequest && (deltaRequest!=null)) deltaRequest.setPrincipal(principal);
}
/**
* Return the <code>HttpSession</code> for which this object
* is the facade.
*/
public HttpSession getSession() {
if (facade == null){
if (System.getSecurityManager() != null){
final DeltaSession fsession = this;
facade = (DeltaSessionFacade)AccessController.doPrivileged(new PrivilegedAction(){
public Object run(){
return new DeltaSessionFacade(fsession);
}
});
} else {
facade = new DeltaSessionFacade(this);
}
}
return (facade);
}
/**
* Return the <code>isValid</code> flag for this session.
*/
public boolean isValid() {
if (this.expiring){
return true;
}
if (!this.isValid ) {
return false;
}
if (accessCount > 0 ) {
return true;
}
if (maxInactiveInterval >= 0) {
long timeNow = System.currentTimeMillis();
int timeIdle = (int) ((timeNow - lastAccessedTime) / 1000L);
if ( (timeIdle >= maxInactiveInterval) && (isPrimarySession()) ) {
expire(true);
} else if ( timeIdle >= (2*maxInactiveInterval) ) {
//if the session has been idle twice as long as allowed,
//the primary session has probably crashed, and no other
//requests are coming in. that is why we do this. otherwise
//we would have a memory leak
expire(true,false);
}
}
return (this.isValid);
}
/**
* Set the <code>isValid</code> flag for this session.
*
* @param isValid The new value for the <code>isValid</code> flag
*/
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.
*/
public void access() {
this.isNew = false;
this.lastAccessedTime = this.thisAccessedTime;
this.thisAccessedTime = System.currentTimeMillis();
evaluateIfValid();
accessCount++;
}
public void endAccess() {
isNew = false;
accessCount--;
}
/**
* Add a session event listener to this component.
*/
public void addSessionListener(SessionListener listener) {
synchronized (listeners) {
listeners.add(listener);
}
}
/**
* Perform the internal processing required to invalidate this session,
* without triggering an exception if the session has already expired.
*/
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) {
expire(notify,true);
}
public void expire(boolean notify, boolean notifyCluster) {
// Mark this session as "being expired" if needed
if (expiring)
return;
String expiredId = getId();
synchronized (this) {
if (manager == null)
return;
expiring = true;
// Notify interested application event listeners
// FIXME - Assumes we call listeners in reverse order
Context context = (Context) manager.getContainer();
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) {
try {
fireContainerEvent(context,
"afterSessionDestroyed",
listener);
} catch (Exception e) {
;
}
// FIXME - should we do anything besides log these?
log.error(sm.getString("standardSession.sessionEvent"), t);
}
}
}
accessCount=0;
setValid(false);
// Remove this session from our manager's active sessions
if (manager != null)
manager.remove(this);
// Notify interested session event listeners
if (notify) {
fireSessionEvent(Session.SESSION_DESTROYED_EVENT, null);
}
// 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, false);
if ( notifyCluster ) {
log.debug("Notifying cluster of expiration primary=" +
isPrimarySession() + " id=" + expiredId);
( (DeltaManager) manager).sessionExpired(expiredId);
}
}
}
/**
* 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
*/
public Object getNote(String name) {
synchronized (notes) {
return (notes.get(name));
}
}
/**
* Return an Iterator containing the String names of all notes bindings
* that exist for this session.
*/
public Iterator getNoteNames() {
synchronized (notes) {
return (notes.keySet().iterator());
}
}
/**
* Release all object references, and initialize instance variables, in
* preparation for reuse of this object.
*/
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;
accessCount = 1;
notes.clear();
setPrincipal(null);
isNew = false;
isValid = false;
manager = null;
deltaRequest.clear();
}
/**
* Remove any object bound to the specified name in the internal notes
* for this session.
*
* @param name Name of the note to be removed
*/
public void removeNote(String name) {
synchronized (notes) {
notes.remove(name);
}
}
/**
* Remove a session event listener from this component.
*/
public void removeSessionListener(SessionListener listener) {
synchronized (listeners) {
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
*/
public void setNote(String name, Object value) {
synchronized (notes) {
notes.put(name, value);
}
}
/**
* Return a string representation of this object.
*/
public String toString() {
StringBuffer sb = new StringBuffer();
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);
}
public void resetDeltaRequest() {
if ( deltaRequest == null ) {
deltaRequest = new DeltaRequest(getId(),false);
} else {
deltaRequest.reset();
deltaRequest.setSessionId(getId());
}
}
public DeltaRequest getDeltaRequest() {
if ( deltaRequest == null ) resetDeltaRequest();
return deltaRequest;
}
// ------------------------------------------------- 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
*/
public long getCreationTime() {
if (!expiring && !isValid)
throw new IllegalStateException
(sm.getString("standardSession.getCreationTime.ise"));
return (this.creationTime);
}
/**
* Return the ServletContext to which this session belongs.
*/
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.
*/
public 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
* <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
*/
public Object getAttribute(String name) {
if (!isValid())
throw new IllegalStateException
(sm.getString("standardSession.getAttribute.ise"));
synchronized (attributes) {
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
*/
public Enumeration getAttributeNames() {
if (!isValid())
throw new IllegalStateException
(sm.getString("standardSession.getAttributeNames.ise"));
synchronized (attributes) {
return (new Enumerator(attributes.keySet(), true));
}
}
/**
* 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 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
* <code>getAttribute()</code>
*/
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
* <code>getAttributeNames()</code>
*/
public String[] getValueNames() {
if (!isValid())
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
*/
public void invalidate() {
if (!isValid())
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
*/
public boolean isNew() {
if (!isValid())
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.
* <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 IllegalStateException if this method is called on an
* invalidated session
*
* @deprecated As of Version 2.2, this method is replaced by
* <code>setAttribute()</code>
*/
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.
* <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
*/
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) {
removeAttribute(name,notify,true);
}
public void removeAttribute(String name, boolean notify, boolean addDeltaRequest) {
// Validate our current state
if (!isValid())
throw new IllegalStateException
(sm.getString("standardSession.removeAttribute.ise"));
removeAttributeInternal(name,notify,addDeltaRequest);
}
/**
* 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
*
* @deprecated As of Version 2.2, this method is replaced by
* <code>removeAttribute()</code>
*/
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.
* <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
*/
public void setAttribute(String name, Object value) {
setAttribute(name,value,true);
}
public void setAttribute(String name, Object value, boolean addDeltaRequest) {
// 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;
}
if ( ! (value instanceof java.io.Serializable) ) {
throw new IllegalArgumentException("Attribute ["+name+"] is not serializable");
}
if (addDeltaRequest && (deltaRequest!=null)) deltaRequest.setAttribute(name,value);
// Validate our current state
if (!isValid())
throw new IllegalStateException
(sm.getString("standardSession.setAttribute.ise"));
if ((manager != null) && manager.getDistributable() &&
!(value instanceof Serializable))
throw new IllegalArgumentException
(sm.getString("standardSession.setAttribute.iae"));
// Construct an event with the new value
HttpSessionBindingEvent event = null;
// Call the valueBound() method if necessary
if ( value instanceof HttpSessionBindingListener ) {
event = new HttpSessionBindingEvent(this, name, value);
try {
( (HttpSessionBindingListener) value).valueBound(event);
} catch ( Exception x ) {
log.error("Session binding listener throw an exception",x);
}
}
// Replace or add this attribute
Object unbound = attributes.put(name, value);
// Call the valueUnbound() method if necessary
if ((unbound != null) &&
(unbound instanceof HttpSessionBindingListener)) {
try {
( (HttpSessionBindingListener) unbound).valueUnbound
(new HttpSessionBindingEvent( (HttpSession)this, name));
} catch ( Exception x ) {
log.error("Session binding listener throw an exception",x);
}
}
// 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
(this,name,unbound);
}
listener.attributeReplaced(event);
fireContainerEvent(context,
"afterSessionAttributeReplaced",
listener);
} else {
fireContainerEvent(context,
"beforeSessionAttributeAdded",
listener);
if (event == null) {
event = new HttpSessionBindingEvent
(this, name, unbound);
}
listener.attributeAdded(event);
fireContainerEvent(context,
"afterSessionAttributeAdded",
listener);
}
} catch (Throwable t) {
try {
if (unbound != null) {
fireContainerEvent(context,
"afterSessionAttributeReplaced",
listener);
} else {
fireContainerEvent(context,
"afterSessionAttributeAdded",
listener);
}
} catch (Exception e) {
;
}
// FIXME - should we do anything besides log these?
log.error(sm.getString("standardSession.attributeEvent"), t);
}
}
}
// -------------------------------------------- HttpSession Private Methods
/**
* 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
*/
private 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();
boolean hasPrincipal = stream.readBoolean();
principal = null;
if ( hasPrincipal ) {
principal = SerializablePrincipal.readPrincipal(stream,getManager().getContainer().getRealm());
}
// setId((String) stream.readObject());
id = (String) stream.readObject();
if (log.isDebugEnabled())
log.debug("readObject() loading session " + id);
// Deserialize the attribute count and attribute values
if (attributes == null)
attributes = new HashMap();
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 = (Object) stream.readObject();
if ((value instanceof String) && (value.equals(NOT_SERIALIZED)))
continue;
// if (log.isDebugEnabled())
// log.debug(" loading attribute '" + name +
// "' with value '" + value + "'");
synchronized (attributes) {
attributes.put(name, value);
}
}
isValid = isValidSave;
}
/**
* 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
*/
private void writeObject(ObjectOutputStream stream) throws IOException {
// Write the scalar instance variables (except Manager)
stream.writeObject(new Long(creationTime));
stream.writeObject(new Long(lastAccessedTime));
stream.writeObject(new Integer(maxInactiveInterval));
stream.writeObject(new Boolean(isNew));
stream.writeObject(new Boolean(isValid));
stream.writeObject(new Long(thisAccessedTime));
stream.writeBoolean(getPrincipal()!=null);
if (getPrincipal() != null) {
SerializablePrincipal.writePrincipal((GenericPrincipal)principal,stream);
}
stream.writeObject(id);
if (log.isDebugEnabled())
log.debug("writeObject() storing session " + id);
// Accumulate the names of serializable and non-serializable attributes
String keys[] = keys();
ArrayList saveNames = new ArrayList();
ArrayList saveValues = new ArrayList();
for (int i = 0; i < keys.length; i++) {
Object value = null;
synchronized (attributes) {
value = attributes.get(keys[i]);
}
if (value == null)
continue;
else if (value instanceof Serializable) {
saveNames.add(keys[i]);
saveValues.add(value);
}
}
// Serialize the attribute count and the Serializable attributes
int n = saveNames.size();
stream.writeObject(new Integer(n));
for (int i = 0; i < n; i++) {
stream.writeObject((String) saveNames.get(i));
try {
stream.writeObject(saveValues.get(i));
// if (log.isDebugEnabled())
// log.debug(" storing attribute '" + saveNames.get(i) +
// "' with value '" + saveValues.get(i) + "'");
} catch (NotSerializableException e) {
log.error(sm.getString("standardSession.notSerializable",
saveNames.get(i), id), e);
stream.writeObject(NOT_SERIALIZED);
log.error(" storing attribute '" + saveNames.get(i) +
"' with value NOT_SERIALIZED");
}
}
}
private void evaluateIfValid() {
/*
* If this session has expired or is in the process of expiring or
* will never expire, return
*/
if (!this.isValid || expiring || maxInactiveInterval < 0)
return;
isValid();
}
// -------------------------------------------------------- Private Methods
/**
* Fire container events if the Context implementation is the
* <code>org.apache.catalina.core.StandardContext</code>.
*
* @param context Context for which to fire events
* @param type Event type
* @param data Event data
*
* @exception Exception occurred during event firing
*/
private void fireContainerEvent(Context context,
String type, Object data)
throws Exception {
if (!"org.apache.catalina.core.StandardContext".equals
(context.getClass().getName())) {
return; // Container events are not supported
}
// NOTE: Race condition is harmless, so do not synchronize
if (containerEventMethod == null) {
containerEventMethod =
context.getClass().getMethod("fireContainerEvent",
containerEventTypes);
}
Object containerEventParams[] = new Object[2];
containerEventParams[0] = type;
containerEventParams[1] = data;
containerEventMethod.invoke(context, containerEventParams);
}
/**
* 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 = (SessionListener[]) listeners.toArray(list);
}
for (int i = 0; i < list.length; i++){
((SessionListener) list[i]).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() {
String results[] = new String[0];
synchronized (attributes) {
return ((String[]) attributes.keySet().toArray(results));
}
}
/**
* Return the value of an attribute without a check for validity.
*/
protected Object getAttributeInternal(String name) {
synchronized (attributes) {
return (attributes.get(name));
}
}
protected void removeAttributeInternal(String name, boolean notify, boolean addDeltaRequest) {
// Remove this attribute from our collection
Object value = attributes.remove(name);
if ( value == null ) return;
if (addDeltaRequest && (deltaRequest!=null)) deltaRequest.removeAttribute(name);
// Do we need to do valueUnbound() and attributeRemoved() notification?
if (!notify) {
return;
}
// Call the valueUnbound() method if necessary
HttpSessionBindingEvent event =
new HttpSessionBindingEvent((HttpSession) this, name, value);
if ((value != null) &&
(value instanceof HttpSessionBindingListener))
try {
( (HttpSessionBindingListener) value).valueUnbound(event);
} catch ( Exception x ) {
log.error("Session binding listener throw an exception",x);
}
// 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 {
fireContainerEvent(context,
"beforeSessionAttributeRemoved",
listener);
listener.attributeRemoved(event);
fireContainerEvent(context,
"afterSessionAttributeRemoved",
listener);
} catch (Throwable t) {
try {
fireContainerEvent(context,
"afterSessionAttributeRemoved",
listener);
} catch (Exception e) {
;
}
// FIXME - should we do anything besides log these?
log.error(sm.getString("standardSession.attributeEvent"), t);
}
}
}
protected long getLastTimeReplicated() {
return lastTimeReplicated;
}
protected void setLastTimeReplicated(long lastTimeReplicated) {
this.lastTimeReplicated = lastTimeReplicated;
}
protected void setAccessCount(int accessCount) {
this.accessCount = accessCount;
}
protected int getAccessCount() {
return accessCount;
}
}
// -------------------------------------------------------------- Private Class
/**
* This class is a dummy implementation of the <code>HttpSessionContext</code>
* interface, to conform to the requirement that such an object be returned
* when <code>HttpSession.getSessionContext()</code> is called.
*
* @author Craig R. McClanahan
*
* @deprecated As of Java Servlet API 2.1 with no replacement. The
* interface will be removed in a future version of this API.
*/
final class StandardSessionContext implements HttpSessionContext {
private HashMap dummy = new HashMap();
/**
* Return the session identifiers of all sessions defined
* within this context.
*
* @deprecated As of Java Servlet API 2.1 with no replacement.
* This method must return an empty <code>Enumeration</code>
* and will be removed in a future version of the API.
*/
public Enumeration getIds() {
return (new Enumerator(dummy));
}
/**
* Return the <code>HttpSession</code> associated with the
* specified session identifier.
*
* @param id Session identifier for which to look up a session
*
* @deprecated As of Java Servlet API 2.1 with no replacement.
* This method must return null and will be removed in a
* future version of the API.
*/
public HttpSession getSession(String id) {
return (null);
}
}