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From cos...@apache.org
Subject cvs commit: jakarta-tomcat-connectors/jk/java/org/apache/jk/common HandlerDispatch.java
Date Wed, 06 Feb 2002 17:41:29 GMT
costin      02/02/06 09:41:29

  Added:       jk/java/org/apache/jk/common HandlerDispatch.java
  Log:
  Dispatch handler - based on the message type will call the right
  handler.
  
  This is specific to ajp13 ( or any other transport that stores the message type
  as the first byte of the message :-).
  Each protocol is supposed to have a set of protocol-specific handlers,
  some may be generic.
  
  What we'll eventually do is create an HandlerAjp13 to consolidate ajp13
  specific processing. Other protocols could do the same.
  Then whatever info containes the 'target' will be stored as the message
  tag, and the rest of the info will be decoded in message/request/etc.
  
  Note that the tag is an int - we want to reduce the use of Strings,
  and do table dispatching, so protocol handlers should use a message handle
  
  Revision  Changes    Path
  1.1                  jakarta-tomcat-connectors/jk/java/org/apache/jk/common/HandlerDispatch.java
  
  Index: HandlerDispatch.java
  ===================================================================
  /*
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 1999 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   * [Additional notices, if required by prior licensing conditions]
   *
   */
  
  package org.apache.jk.common;
  
  import java.io.*;
  import java.net.*;
  import java.util.*;
  import java.security.*;
  import java.security.cert.*;
  
  import org.apache.jk.core.*;
  
  import org.apache.tomcat.util.http.*;
  import org.apache.tomcat.util.buf.*;
  
  
  /**
   * Dispatch based on the message type. ( XXX make it more generic,
   * now it's specific to ajp13 ).
   * 
   * @author Costin Manolache
   */
  public class HandlerDispatch extends JkHandler
  {
  
      public HandlerDispatch() 
      {
      }
  
      public void init() {
      }
  
      JkHandler handlers[]=new JkHandler[MAX_HANDLERS];
      String handlerNames[]=new String[MAX_HANDLERS];
      
      static final int MAX_HANDLERS=32;    
      static final int RESERVED=16;  // reserved names, backward compat
      int currentId=RESERVED;
  
      public int registerMessageType( int id, String name, JkHandler h,
                                      String sig[] )
      {
          if( logL > 0 )
              log( "Register message " + id + " " + h.getName() +
                   " " + h.getClass().getName());
  	if( id < 0 ) {
  	    // try to find it by name
  	    for( int i=0; i< handlerNames.length; i++ ) {
                  if( handlerNames[i]==null ) continue;
                  if( name.equals( handlerNames[i] ) )
                      return i;
              }
  	    handlers[currentId]=h;
              handlerNames[currentId]=name;
  	    currentId++;
  	    return currentId;
  	}
  	handlers[id]=h;
          handlerNames[currentId]=name;
  	return id;
      }
  
      
      // -------------------- Incoming message --------------------
  
      public int invoke(Msg msg, MsgContext ep ) 
          throws IOException
      {
          int type=msg.peekByte();
          msg.setTag( type );
          
          if( type > handlers.length ||
              handlers[type]==null ) {
  	    log( "Invalid handler " + type );
  	    return ERROR;
  	}
  
          if( logL > 0 )
              log( "Received " + type + " " + handlers[type].getName());
          
  	JkHandler handler=handlers[type];
          
          return handler.invoke( msg, ep );
      }
  
   }
  
  
  

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