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/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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 async;

import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.Date;

import javax.servlet.AsyncContext;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.juli.logging.Log;

import org.apache.juli.logging.LogFactory;

public class Async0 extends HttpServlet {

    private static final long serialVersionUID = 1L;

    private static final Log log = LogFactory.getLog(Async0.class);

    @Override

    protected void service(final HttpServletRequest req, final HttpServletResponse resp) throws ServletException, IOException {

        if (Boolean.TRUE.equals(req.getAttribute("dispatch"))) {

            log.info("Received dispatch, completing on the worker thread.");

            log.info("After complete called started:"+req.isAsyncStarted());

            Date date = new Date(System.currentTimeMillis());

            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z");

            resp.getWriter().write("Async dispatch worked: " + sdf.format(date) + "\n");

        } else {

            resp.setContentType("text/plain");

            final AsyncContext actx = req.startAsync();

            actx.setTimeout(Long.MAX_VALUE);

            Runnable run = new Runnable() {

                @Override

                public void run() {

                    try {

                        req.setAttribute("dispatch", Boolean.TRUE);

                        Thread.currentThread().setName("Async0-Thread");

                        log.info("Putting AsyncThread to sleep");

                        Thread.sleep(2*1000);

                        log.info("Dispatching");

                        actx.dispatch();

                    }catch (InterruptedException | IllegalStateException x) {

                        log.error("Async1",x);

                    }

                }

            };

            Thread t = new Thread(run);

            t.start();

        }

    }

}