/*
* 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;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Utility servlet that delegates to an EJB to perform topology stabilization.
* @author Paul Ferraro
*/
@WebServlet(urlPatterns = { TopologyChangeListenerServlet.SERVLET_PATH })
public class TopologyChangeListenerServlet extends HttpServlet {
private static final long serialVersionUID = -4382952409558738642L;
private static final String SERVLET_NAME = "membership";
static final String SERVLET_PATH = "/" + SERVLET_NAME;
private static final String CONTAINER = "container";
private static final String CACHE = "cache";
private static final String NODES = "nodes";
private static final String TIMEOUT = "timeout";
public static URI createURI(URL baseURL, String container, String cache, long timeout, String... nodes) throws URISyntaxException {
StringBuilder builder = new StringBuilder(baseURL.toURI().resolve(SERVLET_NAME).toString());
builder.append('?').append(CONTAINER).append('=').append(container);
builder.append('&').append(CACHE).append('=').append(cache);
builder.append('&').append(TIMEOUT).append('=').append(timeout);
for (String node: nodes) {
builder.append('&').append(NODES).append('=').append(node);
}
return URI.create(builder.toString());
}
@EJB
private TopologyChangeListener listener;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String container = getRequiredParameter(request, CONTAINER);
String cache = getRequiredParameter(request, CACHE);
String[] nodes = request.getParameterValues(NODES);
long timeout = parseLong(getRequiredParameter(request, TIMEOUT));
try {
this.listener.establishTopology(container, cache, timeout, nodes);
} catch (InterruptedException e) {
throw new ServletException(e);
}
}
private static String getRequiredParameter(HttpServletRequest request, String name) throws ServletException {
String value = request.getParameter(name);
if (value == null) {
throw new ServletException(String.format("No '%s' parameter specified", name));
}
return value;
}
private static long parseLong(String value) throws ServletException {
try {
return Long.parseLong(value);
} catch (NumberFormatException e) {
throw new ServletException(String.format("Value '%s' cannot be parsed to long.", value), e);
}
}
}