//========================================================================
//$Id: HandlerCollection.java,v 1.5 2005/11/11 22:55:39 gregwilkins Exp $
//Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
//------------------------------------------------------------------------
//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.mortbay.jetty.handler;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.mortbay.jetty.EofException;
import org.mortbay.jetty.Handler;
import org.mortbay.jetty.Server;
import org.mortbay.util.LazyList;
import org.mortbay.util.MultiException;
/* ------------------------------------------------------------ */
/** A collection of handlers.
* For each request, all handler are called, regardless of
* the response status or exceptions.
*
* @author gregw
* @org.apache.xbean.XBean
*/
public class HandlerCollection extends AbstractHandlerContainer
{
private Handler[] _handlers;
/* ------------------------------------------------------------ */
public HandlerCollection()
{
super();
}
/* ------------------------------------------------------------ */
/**
* @return Returns the handlers.
*/
public Handler[] getHandlers()
{
return _handlers;
}
/* ------------------------------------------------------------ */
/**
*
* @param handlers The handlers to set.
*/
public void setHandlers(Handler[] handlers)
{
Handler [] old_handlers = _handlers==null?null:(Handler[])_handlers.clone();
if (getServer()!=null)
getServer().getContainer().update(this, old_handlers, handlers, "handler");
Server server = getServer();
MultiException mex = new MultiException();
for (int i=0;handlers!=null && i<handlers.length;i++)
{
if (handlers[i].getServer()!=server)
handlers[i].setServer(server);
}
// quasi atomic.... so don't go doing this under load on a SMP system.
_handlers = handlers;
for (int i=0;old_handlers!=null && i<old_handlers.length;i++)
{
if (old_handlers[i]!=null)
{
try
{
if (old_handlers[i].isStarted())
old_handlers[i].stop();
}
catch (Throwable e)
{
mex.add(e);
}
}
}
mex.ifExceptionThrowRuntime();
}
/* ------------------------------------------------------------ */
/*
* @see org.mortbay.jetty.EventHandler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public void handle(String target, HttpServletRequest request, HttpServletResponse response, int dispatch)
throws IOException, ServletException
{
if (_handlers!=null && isStarted())
{
MultiException mex=null;
for (int i=0;i<_handlers.length;i++)
{
try
{
_handlers[i].handle(target,request, response, dispatch);
}
catch(IOException e)
{
throw e;
}
catch(RuntimeException e)
{
throw e;
}
catch(Exception e)
{
if (mex==null)
mex=new MultiException();
mex.add(e);
}
}
if (mex!=null)
{
if (mex.size()==1)
throw new ServletException(mex.getThrowable(0));
else
throw new ServletException(mex);
}
}
}
/* ------------------------------------------------------------ */
/*
* @see org.mortbay.jetty.handler.AbstractHandler#doStart()
*/
protected void doStart() throws Exception
{
MultiException mex=new MultiException();
if (_handlers!=null)
{
for (int i=0;i<_handlers.length;i++)
try{_handlers[i].start();}catch(Throwable e){mex.add(e);}
}
super.doStart();
mex.ifExceptionThrow();
}
/* ------------------------------------------------------------ */
/*
* @see org.mortbay.jetty.handler.AbstractHandler#doStop()
*/
protected void doStop() throws Exception
{
MultiException mex=new MultiException();
try { super.doStop(); } catch(Throwable e){mex.add(e);}
if (_handlers!=null)
{
for (int i=_handlers.length;i-->0;)
try{_handlers[i].stop();}catch(Throwable e){mex.add(e);}
}
mex.ifExceptionThrow();
}
/* ------------------------------------------------------------ */
public void setServer(Server server)
{
Server old_server=getServer();
super.setServer(server);
Handler[] h=getHandlers();
for (int i=0;h!=null && i<h.length;i++)
h[i].setServer(server);
if (server!=null && server!=old_server)
server.getContainer().update(this, null,_handlers, "handler");
}
/* ------------------------------------------------------------ */
/* Add a handler.
* This implementation adds the passed handler to the end of the existing collection of handlers.
* @see org.mortbay.jetty.HandlerContainer#addHandler(org.mortbay.jetty.Handler)
*/
public void addHandler(Handler handler)
{
setHandlers((Handler[])LazyList.addToArray(getHandlers(), handler, Handler.class));
}
/* ------------------------------------------------------------ */
public void removeHandler(Handler handler)
{
Handler[] handlers = getHandlers();
if (handlers!=null && handlers.length>0 )
setHandlers((Handler[])LazyList.removeFromArray(handlers, handler));
}
/* ------------------------------------------------------------ */
protected Object expandChildren(Object list, Class byClass)
{
Handler[] handlers = getHandlers();
for (int i=0;handlers!=null && i<handlers.length;i++)
list=expandHandler(handlers[i], list, byClass);
return list;
}
}