/*
* JBoss, Home of Professional Open Source.
* Copyright 2014, 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.test.clustering.cluster.web.async.servlet;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import javax.servlet.AsyncContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* @author Paul Ferraro
*/
@WebServlet(urlPatterns = { AsyncServlet.SERVLET_PATH }, asyncSupported = true)
public class AsyncServlet extends HttpServlet {
private static final long serialVersionUID = -5308818413653125145L;
private static final String SERVLET_NAME = "async";
static final String SERVLET_PATH = "/" + SERVLET_NAME;
public static final String VALUE_HEADER = "value";
public static final String SESSION_ID_HEADER = "sessionId";
static final String ATTRIBUTE = "count";
public static URI createURI(URL baseURL) throws URISyntaxException {
return baseURL.toURI().resolve(SERVLET_NAME);
}
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
HttpSession session = request.getSession(true);
AtomicInteger value = (AtomicInteger) session.getAttribute(ATTRIBUTE);
if (value == null) {
value = new AtomicInteger(0);
session.setAttribute(ATTRIBUTE, value);
}
AsyncContext context = request.startAsync(request, response);
context.start(new AsyncTask(context));
}
private static class AsyncTask implements Runnable {
private final AsyncContext context;
AsyncTask(AsyncContext context) {
this.context = context;
}
@Override
public void run() {
try {
TimeUnit.SECONDS.sleep(1);
HttpServletRequest request = (HttpServletRequest) this.context.getRequest();
HttpServletResponse response = (HttpServletResponse) this.context.getResponse();
AtomicInteger value = (AtomicInteger) request.getSession().getAttribute(ATTRIBUTE);
response.setIntHeader(VALUE_HEADER, value.incrementAndGet());
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} finally {
this.context.complete();
}
}
}
}