/* * 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;
/** * 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>
*/ publicclass StandardSession implements HttpSession, Session, Serializable {
/** * 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();
}
/** * Type array.
*/ protectedstaticfinal 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.
*/ protectedtransient String authType = null;
/** * The time this session was created, in milliseconds since midnight, January 1, 1970 GMT.
*/ protectedlong creationTime = 0L;
/** * 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.
*/ protectedtransientvolatileboolean expiring = false;
/** * The facade associated with this session. NOTE: This value is not included in the serialized version of this * object.
*/ protectedtransient StandardSessionFacade facade = null;
/** * The session identifier of this Session.
*/ protected String id = null;
/** * The last accessed time for this Session.
*/ protectedvolatilelong lastAccessedTime = creationTime;
/** * The session event listeners for this Session.
*/ protectedtransient ArrayList<SessionListener> listeners = new ArrayList<>();
/** * The Manager with which this Session is associated.
*/ protectedtransient 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.
*/ protectedvolatileint maxInactiveInterval = -1;
/** * Flag indicating whether this session is new or not.
*/ protectedvolatileboolean isNew = false;
/** * Flag indicating whether this session is valid or not.
*/ protectedvolatileboolean 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!
*/ protectedtransient 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!
*/ protectedtransient Principal principal = null;
/** * The string manager for this package.
*/ protectedstaticfinal 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.
*/ protectedfinaltransient PropertyChangeSupport support = new PropertyChangeSupport(this);
/** * The current accessed time for this session.
*/ protectedvolatilelong thisAccessedTime = creationTime;
/** * The access count for this session.
*/ protectedtransient AtomicInteger accessCount = null;
/** * The activity check for this session.
*/ protectedtransientboolean activityCheck;
/** * The behavior of the last access check.
*/ protectedtransientboolean lastAccessAtStart;
/** * Return the authentication type used to authenticate our cached Principal, if any.
*/
@Override public String getAuthType() { returnthis.authType;
}
/** * Set the authentication type used to authenticate our cached Principal, if any. * * @param authType The new cached authentication type
*/
@Override publicvoid 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 publicvoid setCreationTime(long time) {
/** * Return the session identifier for this session.
*/
@Override public String getId() { returnthis.id;
}
/** * Return the session identifier for this session.
*/
@Override public String getIdInternal() { returnthis.id;
}
/** * Set the session identifier for this session. * * @param id The new session identifier
*/
@Override publicvoid setId(String id) {
setId(id, true);
}
/** * 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 publicvoid 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;
}
/** * 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 publiclong getThisAccessedTime() {
if (!isValidInternal()) { thrownew IllegalStateException(sm.getString("standardSession.getThisAccessedTime.ise"));
}
returnthis.thisAccessedTime;
}
/** * Return the last client access time without invalidation check * * @see #getThisAccessedTime()
*/
@Override publiclong getThisAccessedTimeInternal() { returnthis.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 publiclong getLastAccessedTime() {
if (!isValidInternal()) { thrownew IllegalStateException(sm.getString("standardSession.getLastAccessedTime.ise"));
}
returnthis.lastAccessedTime;
}
/** * Return the last client access time without invalidation check * * @see #getLastAccessedTime()
*/
@Override publiclong getLastAccessedTimeInternal() { returnthis.lastAccessedTime;
}
/** * Return the idle time (in milliseconds) from last client access time.
*/
@Override publiclong getIdleTime() {
if (!isValidInternal()) { thrownew IllegalStateException(sm.getString("standardSession.getIdleTime.ise"));
}
return getIdleTimeInternal();
}
/** * Return the idle time from last client access time without invalidation check * * @see #getIdleTime()
*/
@Override publiclong 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() { returnthis.manager;
}
/** * Set the Manager within which this Session is valid. * * @param manager The new Manager
*/
@Override publicvoid 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 publicint getMaxInactiveInterval() { returnthis.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 publicvoid 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 publicvoid 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() { returnthis.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 publicvoid 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 publicboolean isValid() {
if (!this.isValid) { returnfalse;
}
if (this.expiring) { returntrue;
}
if (activityCheck && accessCount.get() > 0) { returntrue;
}
if (maxInactiveInterval > 0) { int timeIdle = (int) (getIdleTimeInternal() / 1000L); if (timeIdle >= maxInactiveInterval) {
expire(true);
}
}
returnthis.isValid;
}
/** * Set the <code>isValid</code> flag for this session. * * @param isValid The new value for the <code>isValid</code> flag
*/
@Override publicvoid 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 publicvoid access() {
if (activityCheck) {
accessCount.incrementAndGet();
}
}
/** * End the access.
*/
@Override publicvoid 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 publicvoid 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 publicvoid 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?
*/ publicvoid 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);
/** * 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 publicvoid 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 publicvoid removeNote(String name) {
notes.remove(name);
}
/** * Remove a session event listener from this component.
*/
@Override publicvoid 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 publicvoid 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();
}
/** * 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
*/ publicvoid 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
*/ publicvoid writeObjectData(ObjectOutputStream stream) throws IOException {
/** * 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 publiclong getCreationTime() { if (!isValidInternal()) { thrownew IllegalStateException(sm.getString("standardSession.getCreationTime.ise"));
}
returnthis.creationTime;
}
/** * Return the time when this session was created, in milliseconds since midnight, January 1, 1970 GMT, bypassing the * session validation checks.
*/
@Override publiclong getCreationTimeInternal() { returnthis.creationTime;
}
/** * Return the ServletContext to which this session belongs.
*/
@Override public ServletContext getServletContext() { if (manager == null) { returnnull;
}
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()) { thrownew IllegalStateException(sm.getString("standardSession.getAttribute.ise"));
}
if (name == null) { returnnull;
}
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()) { thrownew 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 publicvoid invalidate() {
if (!isValidInternal()) { thrownew 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 publicboolean isNew() { if (!isValidInternal()) { thrownew IllegalStateException(sm.getString("standardSession.isNew.ise"));
}
returnthis.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 publicvoid 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
*/ publicvoid removeAttribute(String name, boolean notify) {
// Validate our current state if (!isValidInternal()) { thrownew 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 publicvoid 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
*/ publicvoid setAttribute(String name, Object value, boolean notify) {
// Name cannot be null if (name == null) { thrownew 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()) { thrownew IllegalStateException(sm.getString("standardSession.setAttribute.ise", getIdInternal()));
}
Context context = manager.getContext();
if (context.getDistributable() && !isAttributeDistributable(name, value) && !exclude(name, value)) { thrownew 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);
}
}
}
/** * @return the <code>isValid</code> flag for this session without any expiration check.
*/ protectedboolean isValidInternal() { returnthis.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 publicboolean 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
*/ protectedvoid 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
*/ protectedvoid doWriteObject(ObjectOutputStream stream) throws IOException {
// 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;
} elseif (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
*/ privateboolean getPersistAuthentication() { if (manager instanceof ManagerBase) { return ((ManagerBase) manager).getPersistAuthentication();
} returnfalse;
}
/** * 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}
*/ protectedboolean exclude(String name, Object value) { if (Constants.excludedAttributeNames.contains(name)) { returntrue;
}
// 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. returnfalse;
}
// Last check so use a short-cut return !manager.willAttributeDistribute(name, value);
}
/** * 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
*/ publicvoid 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?
*/ protectedvoid 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);
}
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