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378
java/org/apache/catalina/Session.java
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378
java/org/apache/catalina/Session.java
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.catalina;
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import java.security.Principal;
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import java.util.Iterator;
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import javax.servlet.http.HttpSession;
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/**
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* A <b>Session</b> is the Catalina-internal facade for an
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* <code>HttpSession</code> that is used to maintain state information
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* between requests for a particular user of a web application.
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*
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* @author Craig R. McClanahan
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*/
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public interface Session {
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// ----------------------------------------------------- Manifest Constants
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/**
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* The SessionEvent event type when a session is created.
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*/
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public static final String SESSION_CREATED_EVENT = "createSession";
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/**
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* The SessionEvent event type when a session is destroyed.
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*/
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public static final String SESSION_DESTROYED_EVENT = "destroySession";
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/**
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* The SessionEvent event type when a session is activated.
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*/
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public static final String SESSION_ACTIVATED_EVENT = "activateSession";
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/**
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* The SessionEvent event type when a session is passivated.
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*/
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public static final String SESSION_PASSIVATED_EVENT = "passivateSession";
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// ------------------------------------------------------------- Properties
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/**
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* @return the authentication type used to authenticate our cached
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* Principal, if any.
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*/
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public String getAuthType();
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/**
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* Set the authentication type used to authenticate our cached
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* Principal, if any.
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*
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* @param authType The new cached authentication type
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*/
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public void setAuthType(String authType);
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/**
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* @return the creation time for this session.
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*/
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public long getCreationTime();
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/**
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* @return the creation time for this session, bypassing the session validity
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* checks.
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*/
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public long getCreationTimeInternal();
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/**
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* Set the creation time for this session. This method is called by the
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* Manager when an existing Session instance is reused.
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*
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* @param time The new creation time
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*/
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public void setCreationTime(long time);
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/**
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* @return the session identifier for this session.
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*/
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public String getId();
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/**
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* @return the session identifier for this session.
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*/
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public String getIdInternal();
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/**
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* Set the session identifier for this session and notifies any associated
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* listeners that a new session has been created.
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*
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* @param id The new session identifier
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*/
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public void setId(String id);
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/**
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* Set the session identifier for this session and optionally notifies any
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* associated listeners that a new session has been created.
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*
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* @param id The new session identifier
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* @param notify Should any associated listeners be notified that a new
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* session has been created?
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*/
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public void setId(String id, boolean notify);
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/**
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* @return the last time the client sent a request associated with this
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* session, as the number of milliseconds since midnight, January 1, 1970
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* GMT. Actions that your application takes, such as getting or setting
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* a value associated with the session, do not affect the access time.
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* This one gets updated whenever a request starts.
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*/
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public long getThisAccessedTime();
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/**
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* @return the last client access time without invalidation check
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* @see #getThisAccessedTime()
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*/
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public long getThisAccessedTimeInternal();
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/**
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* @return the last time the client sent a request associated with this
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* session, as the number of milliseconds since midnight, January 1, 1970
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* GMT. Actions that your application takes, such as getting or setting
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* a value associated with the session, do not affect the access time.
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* This one gets updated whenever a request finishes.
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*/
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public long getLastAccessedTime();
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/**
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* @return the last client access time without invalidation check
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* @see #getLastAccessedTime()
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*/
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public long getLastAccessedTimeInternal();
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/**
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* @return the idle time (in milliseconds) from last client access time.
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*/
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public long getIdleTime();
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/**
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* @return the idle time from last client access time without invalidation check
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* @see #getIdleTime()
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*/
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public long getIdleTimeInternal();
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/**
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* @return the Manager within which this Session is valid.
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*/
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public Manager getManager();
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/**
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* Set the Manager within which this Session is valid.
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*
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* @param manager The new Manager
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*/
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public void setManager(Manager manager);
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/**
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* @return the maximum time interval, in seconds, between client requests
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* before the servlet container will invalidate the session. A negative
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* time indicates that the session should never time out.
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*/
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public int getMaxInactiveInterval();
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/**
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* Set the maximum time interval, in seconds, between client requests
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* before the servlet container will invalidate the session. A negative
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* time indicates that the session should never time out.
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*
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* @param interval The new maximum interval
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*/
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public void setMaxInactiveInterval(int interval);
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/**
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* Set the <code>isNew</code> flag for this session.
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*
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* @param isNew The new value for the <code>isNew</code> flag
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*/
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public void setNew(boolean isNew);
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/**
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* @return the authenticated Principal that is associated with this Session.
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* This provides an <code>Authenticator</code> with a means to cache a
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* previously authenticated Principal, and avoid potentially expensive
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* <code>Realm.authenticate()</code> calls on every request. If there
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* is no current associated Principal, return <code>null</code>.
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*/
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public Principal getPrincipal();
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/**
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* Set the authenticated Principal that is associated with this Session.
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* This provides an <code>Authenticator</code> with a means to cache a
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* previously authenticated Principal, and avoid potentially expensive
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* <code>Realm.authenticate()</code> calls on every request.
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*
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* @param principal The new Principal, or <code>null</code> if none
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*/
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public void setPrincipal(Principal principal);
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/**
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* @return the <code>HttpSession</code> for which this object
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* is the facade.
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*/
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public HttpSession getSession();
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/**
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* Set the <code>isValid</code> flag for this session.
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*
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* @param isValid The new value for the <code>isValid</code> flag
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*/
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public void setValid(boolean isValid);
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/**
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* @return <code>true</code> if the session is still valid
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*/
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public boolean isValid();
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// --------------------------------------------------------- Public Methods
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/**
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* Update the accessed time information for this session. This method
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* should be called by the context when a request comes in for a particular
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* session, even if the application does not reference it.
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*/
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public void access();
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/**
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* Add a session event listener to this component.
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*
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* @param listener the SessionListener instance that should be notified
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* for session events
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*/
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public void addSessionListener(SessionListener listener);
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/**
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* End access to the session.
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*/
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public void endAccess();
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/**
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* Perform the internal processing required to invalidate this session,
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* without triggering an exception if the session has already expired.
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*/
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public void expire();
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/**
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* @return the object bound with the specified name to the internal notes
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* for this session, or <code>null</code> if no such binding exists.
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*
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* @param name Name of the note to be returned
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*/
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public Object getNote(String name);
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/**
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* @return an Iterator containing the String names of all notes bindings
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* that exist for this session.
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*/
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public Iterator<String> getNoteNames();
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/**
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* Release all object references, and initialize instance variables, in
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* preparation for reuse of this object.
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*/
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public void recycle();
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/**
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* Remove any object bound to the specified name in the internal notes
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* for this session.
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*
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* @param name Name of the note to be removed
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*/
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public void removeNote(String name);
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/**
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* Remove a session event listener from this component.
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*
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* @param listener remove the session listener, which will no longer be
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* notified
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*/
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public void removeSessionListener(SessionListener listener);
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/**
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* Bind an object to a specified name in the internal notes associated
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* with this session, replacing any existing binding for this name.
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*
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* @param name Name to which the object should be bound
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* @param value Object to be bound to the specified name
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*/
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public void setNote(String name, Object value);
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/**
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* Inform the listeners about the change session ID.
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*
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* @param newId new session ID
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* @param oldId old session ID
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* @param notifySessionListeners Should any associated sessionListeners be
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* notified that session ID has been changed?
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* @param notifyContainerListeners Should any associated ContainerListeners
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* be notified that session ID has been changed?
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*/
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public void tellChangedSessionId(String newId, String oldId,
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boolean notifySessionListeners, boolean notifyContainerListeners);
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/**
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* Does the session implementation support the distributing of the given
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* attribute? If the Manager is marked as distributable, then this method
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* must be used to check attributes before adding them to a session and
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* an {@link IllegalArgumentException} thrown if the proposed attribute is
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* not distributable.
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* <p>
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* Note that the {@link Manager} implementation may further restrict which
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* attributes are distributed but a {@link Manager} level restriction should
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* not trigger an {@link IllegalArgumentException} in
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* {@link HttpSession#setAttribute(String, Object)}
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*
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* @param name The attribute name
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* @param value The attribute value
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*
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* @return {@code true} if distribution is supported, otherwise {@code
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* false}
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*/
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public boolean isAttributeDistributable(String name, Object value);
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}
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