    001// Licensed under the Apache License, Version 2.0 (the "License");
    002// you may not use this file except in compliance with the License.
    003// You may obtain a copy of the License at
    004//
    005// http://www.apache.org/licenses/LICENSE-2.0
    006//
    007// Unless required by applicable law or agreed to in writing, software
    008// distributed under the License is distributed on an "AS IS" BASIS,
    009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    010// See the License for the specific language governing permissions and
    011// limitations under the License.
    012package org.apache.tapestry5.http.internal.services;
    013
    014import java.util.List;
    015
    016import javax.servlet.http.HttpServletRequest;
    017import javax.servlet.http.HttpServletResponse;
    018
    019import org.apache.tapestry5.http.AsyncRequestHandler;
    020import org.apache.tapestry5.http.AsyncRequestHandlerResponse;
    021import org.apache.tapestry5.http.internal.AsyncRequestService;
    022
    023/**
    024 * Service that handles Tapestry's support for asynchronous Servlet API requests.
    025 */
    026public class AsyncRequestServiceImpl implements AsyncRequestService
    027{
    028
    029    final private List<AsyncRequestHandler> handlers;
    030
    031    public AsyncRequestServiceImpl(List<AsyncRequestHandler> handlers)
    032    {
    033        super();
    034        this.handlers = handlers;
    035    }
    036
    037    public AsyncRequestHandlerResponse handle(HttpServletRequest request, HttpServletResponse response)
    038    {
    039
    040        AsyncRequestHandlerResponse handlerResponse = AsyncRequestHandlerResponse.notHandled();
    041
    042        for (AsyncRequestHandler asyncRequestHandler : handlers)
    043        {
    044            handlerResponse = asyncRequestHandler.handle(request, response);
    045            if (handlerResponse.isAsync())
    046            {
    047                break;
    048            }
    049        }
    050
    051        return handlerResponse;
    052    }
    053
    054}