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package org.apache.jk.common;
import java.io.IOException;
import java.util.logging.*;
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 Logger log=
Logger.getLogger( HandlerDispatch.class.getName() );
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.isLoggable(Level.FINEST) )
log.finest( "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.isLoggable(Level.FINEST) )
log.finest( "Invalid handler " + type );
return ERROR;
}
if( log.isLoggable(Level.FINEST) )
log.finest( "Received " + type + " " + handlers[type].getName());
JkHandler handler=handlers[type];
return handler.invoke( msg, ep );
}
}