/*
* 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.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.juli.logging.Log log=
org.apache.juli.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 );
}
}