| /* |
| * Copyright 1999-2004 The Apache Software Foundation |
| * |
| * Licensed 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.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 ); |
| } |
| |
| } |