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* JBoss, Home of Professional Open Source.
* Copyright 2013, 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.passivation;
import java.io.Serializable;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.AbstractMap.SimpleImmutableEntry;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
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;
import javax.servlet.http.HttpSessionActivationListener;
import javax.servlet.http.HttpSessionEvent;
@WebServlet(urlPatterns = SessionOperationServlet.SERVLET_PATH)
public class SessionOperationServlet extends HttpServlet {
private static final long serialVersionUID = -1769104491085299700L;
private static final String SERVLET_NAME = "listener";
static final String SERVLET_PATH = "/" + SERVLET_NAME;
private static final String OPERATION = "operation";
private static final String INVALIDATE = "invalidate";
private static final String GET = "get";
private static final String SET = "set";
private static final String REMOVE = "remove";
private static final String TIMEOUT = "timeout";
private static final String NAME = "name";
private static final String VALUE = "value";
public static final String RESULT = "result";
public static final String SESSION_ID = "jsessionid";
public static URI createGetURI(URL baseURL, String name) throws URISyntaxException {
return createGetURI(baseURL, name, null);
}
public static URI createGetURI(URL baseURL, String name, String value) throws URISyntaxException {
StringBuilder builder = appendParameter(buildURI(GET), NAME, name);
if (value != null) {
appendParameter(builder, VALUE, value);
}
return baseURL.toURI().resolve(builder.toString());
}
public static URI createSetURI(URL baseURL, String name, String... values) throws URISyntaxException {
StringBuilder builder = appendParameter(buildURI(SET), NAME, name);
for (String value: values) {
appendParameter(builder, VALUE, value);
}
return baseURL.toURI().resolve(builder.toString());
}
public static URI createRemoveURI(URL baseURL, String name) throws URISyntaxException {
return baseURL.toURI().resolve(appendParameter(buildURI(REMOVE), NAME, name).toString());
}
public static URI createInvalidateURI(URL baseURL) throws URISyntaxException {
return baseURL.toURI().resolve(buildURI(INVALIDATE).toString());
}
public static URI createTimeoutURI(URL baseURL, int timeout) throws URISyntaxException {
return baseURL.toURI().resolve(appendParameter(buildURI(TIMEOUT), TIMEOUT, Integer.toString(timeout)).toString());
}
private static StringBuilder buildURI(String operation) {
return new StringBuilder(SERVLET_NAME).append('?').append(OPERATION).append('=').append(operation);
}
private static StringBuilder appendParameter(StringBuilder builder, String parameter, String value) {
return builder.append('&').append(parameter).append('=').append(value);
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException {
String operation = getRequiredParameter(req, OPERATION);
HttpSession session = req.getSession(true);
resp.addHeader(SESSION_ID, session.getId());
System.out.println(String.format("%s?%s;jsessionid=%s", req.getRequestURL(), req.getQueryString(), session.getId()));
switch (operation) {
case SET: {
String name = getRequiredParameter(req, NAME);
String value = req.getParameter(VALUE);
session.setAttribute(name, (value != null) ? new SessionAttributeValue(value) : null);
break;
}
case REMOVE: {
String name = getRequiredParameter(req, NAME);
session.removeAttribute(name);
break;
}
case INVALIDATE: {
session.invalidate();
break;
}
case GET: {
String name = getRequiredParameter(req, NAME);
SessionAttributeValue value = (SessionAttributeValue) session.getAttribute(name);
if (value != null) {
resp.setHeader(RESULT, value.getValue());
}
break;
}
case TIMEOUT: {
String timeout = getRequiredParameter(req, TIMEOUT);
session.setMaxInactiveInterval(Integer.parseInt(timeout));
break;
}
default: {
throw new ServletException("Unrecognized operation: " + operation);
}
}
List<Map.Entry<String, EventType>> events = new LinkedList<>();
if (SessionAttributeValue.events.drainTo(events) > 0) {
events.forEach((Map.Entry<String, EventType> entry) -> {
resp.addHeader(entry.getKey(), entry.getValue().name());
});
}
}
private static String getRequiredParameter(HttpServletRequest req, String name) throws ServletException {
String value = req.getParameter(name);
if (value == null) {
throw new ServletException("Missing parameter: " + name);
}
return value;
}
public enum EventType {
PASSIVATION, ACTIVATION;
}
public static class SessionAttributeValue implements Serializable, HttpSessionActivationListener {
private static final long serialVersionUID = -8824497321979784527L;
static BlockingQueue<Map.Entry<String, EventType>> events = new LinkedBlockingQueue<>();
private final String value;
public SessionAttributeValue(String value) {
this.value = value;
}
public String getValue() {
return this.value;
}
@Override
public void sessionWillPassivate(HttpSessionEvent event) {
events.add(new SimpleImmutableEntry<>(event.getSession().getId(), EventType.PASSIVATION));
}
@Override
public void sessionDidActivate(HttpSessionEvent event) {
events.add(new SimpleImmutableEntry<>(event.getSession().getId(), EventType.ACTIVATION));
}
}
}