/*
* ====================================================================
*
* 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.IOException;
import org.apache.jk.core.JkHandler;
import org.apache.jk.core.Msg;
import org.apache.jk.core.MsgContext;
/**
* 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
{
private static org.apache.commons.logging.Log log=
org.apache.commons.logging.LogFactory.getLog( HandlerDispatch.class );
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( log.isDebugEnabled() )
log.debug( "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();
ep.setType( type );
if( type > handlers.length ||
handlers[type]==null ) {
if( log.isDebugEnabled() )
log.debug( "Invalid handler " + type );
return ERROR;
}
if( log.isDebugEnabled() )
log.debug( "Received " + type + " " + handlers[type].getName());
JkHandler handler=handlers[type];
return handler.invoke( msg, ep );
}
}