standardcontext.java

业界著名的tomcat服务器的最新6.0的源代码。

/*
 * 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.core;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Stack;
import java.util.TreeMap;

import javax.management.AttributeNotFoundException;
import javax.management.ListenerNotFoundException;
import javax.management.MBeanNotificationInfo;
import javax.management.MBeanRegistrationException;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.Notification;
import javax.management.NotificationBroadcasterSupport;
import javax.management.NotificationEmitter;
import javax.management.NotificationFilter;
import javax.management.NotificationListener;
import javax.management.ObjectName;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextAttributeListener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.ServletException;
import javax.servlet.ServletRequestAttributeListener;
import javax.servlet.ServletRequestListener;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionListener;

import org.apache.AnnotationProcessor;
import org.apache.catalina.Container;
import org.apache.catalina.ContainerListener;
import org.apache.catalina.Context;
import org.apache.catalina.Engine;
import org.apache.catalina.Globals;
import org.apache.catalina.Host;
import org.apache.catalina.InstanceListener;
import org.apache.catalina.Lifecycle;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleListener;
import org.apache.catalina.Loader;
import org.apache.catalina.Manager;
import org.apache.catalina.Wrapper;
import org.apache.catalina.deploy.ApplicationParameter;
import org.apache.catalina.deploy.ErrorPage;
import org.apache.catalina.deploy.FilterDef;
import org.apache.catalina.deploy.FilterMap;
import org.apache.catalina.deploy.LoginConfig;
import org.apache.catalina.deploy.MessageDestination;
import org.apache.catalina.deploy.MessageDestinationRef;
import org.apache.catalina.deploy.NamingResources;
import org.apache.catalina.deploy.SecurityCollection;
import org.apache.catalina.deploy.SecurityConstraint;
import org.apache.catalina.loader.WebappLoader;
import org.apache.catalina.session.StandardManager;
import org.apache.catalina.startup.ContextConfig;
import org.apache.catalina.startup.TldConfig;
import org.apache.catalina.util.CharsetMapper;
import org.apache.catalina.util.DefaultAnnotationProcessor;
import org.apache.catalina.util.ExtensionValidator;
import org.apache.catalina.util.RequestUtil;
import org.apache.catalina.util.URLEncoder;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.naming.ContextBindings;
import org.apache.naming.resources.BaseDirContext;
import org.apache.naming.resources.DirContextURLStreamHandler;
import org.apache.naming.resources.FileDirContext;
import org.apache.naming.resources.ProxyDirContext;
import org.apache.naming.resources.WARDirContext;
import org.apache.tomcat.util.modeler.Registry;

/**
 * Standard implementation of the <b>Context</b> interface.  Each
 * child container must be a Wrapper implementation to process the
 * requests directed to a particular servlet.
 *
 * @author Craig R. McClanahan
 * @author Remy Maucherat
 * @version $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
 */

public class StandardContext
    extends ContainerBase
    implements Context, Serializable, NotificationEmitter
{
    private static transient Log log = LogFactory.getLog(StandardContext.class);


    // ----------------------------------------------------------- Constructors


    /**
     * Create a new StandardContext component with the default basic Valve.
     */
    public StandardContext() {

        super();
        pipeline.setBasic(new StandardContextValve());
        broadcaster = new NotificationBroadcasterSupport();

    }


    // ----------------------------------------------------- Class Variables


    /**
     * The descriptive information string for this implementation.
     */
    private static final String info =
        "org.apache.catalina.core.StandardContext/1.0";


    /**
     * Array containing the safe characters set.
     */
    protected static URLEncoder urlEncoder;


    /**
     * GMT timezone - all HTTP dates are on GMT
     */
    static {
        urlEncoder = new URLEncoder();
        urlEncoder.addSafeCharacter('~');
        urlEncoder.addSafeCharacter('-');
        urlEncoder.addSafeCharacter('_');
        urlEncoder.addSafeCharacter('.');
        urlEncoder.addSafeCharacter('*');
        urlEncoder.addSafeCharacter('/');
    }


    // ----------------------------------------------------- Instance Variables


    /**
     * The alternate deployment descriptor name.
     */
    private String altDDName = null;


    /**
     * Annotation processor.
     */
    private AnnotationProcessor annotationProcessor = null;


   /**
     * Associated host name.
     */
    private String hostName;


    /**
     * The antiJARLocking flag for this Context.
     */
    private boolean antiJARLocking = false;

    
    /**
     * The antiResourceLocking flag for this Context.
     */
    private boolean antiResourceLocking = false;

    
    /**
     * The set of application listener class names configured for this
     * application, in the order they were encountered in the web.xml file.
     */
    private String applicationListeners[] = new String[0];


    /**
     * The set of instantiated application event listener objects</code>.
     */
    private transient Object applicationEventListenersObjects[] = 
        new Object[0];


    /**
     * The set of instantiated application lifecycle listener objects</code>.
     */
    private transient Object applicationLifecycleListenersObjects[] = 
        new Object[0];


    /**
     * The set of application parameters defined for this application.
     */
    private ApplicationParameter applicationParameters[] =
        new ApplicationParameter[0];


    /**
     * The application available flag for this Context.
     */
    private boolean available = false;
    
    /**
     * The broadcaster that sends j2ee notifications. 
     */
    private NotificationBroadcasterSupport broadcaster = null;
    
    /**
     * The Locale to character set mapper for this application.
     */
    private transient CharsetMapper charsetMapper = null;


    /**
     * The Java class name of the CharsetMapper class to be created.
     */
    private String charsetMapperClass =
      "org.apache.catalina.util.CharsetMapper";


    /**
     * The path to a file to save this Context information.
     */
    private String configFile = null;


    /**
     * The "correctly configured" flag for this Context.
     */
    private boolean configured = false;


    /**
     * The security constraints for this web application.
     */
    private SecurityConstraint constraints[] = new SecurityConstraint[0];


    /**
     * The ServletContext implementation associated with this Context.
     */
    protected transient ApplicationContext context = null;


    /**
     * Compiler classpath to use.
     */
    private String compilerClasspath = null;


    /**
     * Should we attempt to use cookies for session id communication?
     */
    private boolean cookies = true;


    /**
     * Should we allow the <code>ServletContext.getContext()</code> method
     * to access the context of other web applications in this server?
     */
    private boolean crossContext = false;

    
    /**
     * Encoded path.
     */
    private String encodedPath = null;
    

    /**
     * The "follow standard delegation model" flag that will be used to
     * configure our ClassLoader.
     */
    private boolean delegate = false;


    /**
     * The display name of this web application.
     */
    private String displayName = null;


    /** 
     * Override the default context xml location.
     */
    private String defaultContextXml;


    /** 
     * Override the default web xml location.
     */
    private String defaultWebXml;


    /**
     * The distributable flag for this web application.
     */
    private boolean distributable = false;


    /**
     * The document root for this web application.
     */
    private String docBase = null;


    /**
     * The exception pages for this web application, keyed by fully qualified
     * class name of the Java exception.
     */
    private HashMap exceptionPages = new HashMap();


    /**
     * The set of filter configurations (and associated filter instances) we
     * have initialized, keyed by filter name.
     */
    private HashMap filterConfigs = new HashMap();


    /**
     * The set of filter definitions for this application, keyed by
     * filter name.
     */
    private HashMap filterDefs = new HashMap();


    /**
     * The set of filter mappings for this application, in the order
     * they were defined in the deployment descriptor.
     */
    private FilterMap filterMaps[] = new FilterMap[0];


    /**
     * Ignore annotations.
     */
    private boolean ignoreAnnotations = false;


    /**
     * The set of classnames of InstanceListeners that will be added
     * to each newly created Wrapper by <code>createWrapper()</code>.
     */
    private String instanceListeners[] = new String[0];


    /**
     * The login configuration descriptor for this web application.
     */
    private LoginConfig loginConfig = null;


    /**
     * The mapper associated with this context.
     */
    private org.apache.tomcat.util.http.mapper.Mapper mapper = 
        new org.apache.tomcat.util.http.mapper.Mapper();


    /**
     * The naming context listener for this web application.
     */
    private transient NamingContextListener namingContextListener = null;


    /**
     * The naming resources for this web application.
     */
    private NamingResources namingResources = null;


    /**
     * The message destinations for this web application.
     */
    private HashMap messageDestinations = new HashMap();


    /**
     * The MIME mappings for this web application, keyed by extension.
     */
    private HashMap mimeMappings = new HashMap();


     /**
      * Special case: error page for status 200.
      */
     private ErrorPage okErrorPage = null;


    /**
     * The context initialization parameters for this web application,
     * keyed by name.
     */
    private HashMap parameters = new HashMap();


    /**
     * The request processing pause flag (while reloading occurs)
     */
    private boolean paused = false;


    /**
     * The public identifier of the DTD for the web application deployment
     * descriptor version we are currently parsing.  This is used to support
     * relaxed validation rules when processing version 2.2 web.xml files.
     */
    private String publicId = null;


    /**
     * The reloadable flag for this web application.
     */
    private boolean reloadable = false;


    /**
     * Unpack WAR property.
     */
    private boolean unpackWAR = true;


    /**
     * The DefaultContext override flag for this web application.
     */
    private boolean override = false;


    /**
     * The original document root for this web application.
     */
    private String originalDocBase = null;
    
    
    /**
     * The privileged flag for this web application.
     */