/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2009 Red Hat, Inc. and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.as.web.session.mocks;

import java.util.HashSet;
import java.util.Set;

import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;

/**
 * Uses a ThreadLocal to allow a single RequestHandlerValve to concurrently handle requests.
 * 
 * @author Brian Stansberry
 * 
 * @version $Revision: $
 */
public class ConcurrentRequestHandler implements RequestHandler {
    private final ThreadLocal<RequestHandler> threadHandler = new ThreadLocal<RequestHandler>();
    private final Set<RequestHandler> handlers = new HashSet<RequestHandler>();

    public void registerHandler(RequestHandler handler) {
        threadHandler.set(handler);
    }

    public void unregisterHandler() {
        threadHandler.remove();
    }

    @Override
    public void clear() {
        for (RequestHandler handler : handlers) {
            handler.clear();
        }
    }

    public void handleRequest(Request request, Response response) {
        RequestHandler handler = threadHandler.get();
        if (handler == null) {
            throw new IllegalStateException("No handler; call registerHandler before executing requet");
        }
        handler.handleRequest(request, response);
    }

}
