HTTP2MultipleClientSessionsTest.java

/*
 * Copyright (c) 2008-2017 the original author or authors.
 *
 * Licensed 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 org.cometd.client;

import java.io.IOException;
import java.net.HttpCookie;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentLinkedQueue;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.cometd.bayeux.Channel;
import org.cometd.bayeux.Message;
import org.cometd.bayeux.client.ClientSessionChannel;
import org.cometd.bayeux.server.ServerMessage;
import org.cometd.server.AbstractServerTransport;
import org.cometd.server.ServerSessionImpl;
import org.cometd.server.transport.AbstractHttpTransport;
import org.cometd.server.transport.AsyncJSONTransport;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.server.Request;
import org.junit.Assert;
import org.junit.Test;

public class HTTP2MultipleClientSessionsTest extends ClientServerTest {
    @Test
    public void testMultipleClientSession_WithOneMaxSessionPerBrowser_WithMultiSessionInterval() throws Exception {
        long timeout = 7000;
        long multiSessionInterval = 1500;
        Map<String, String> options = new HashMap<>();
        options.put(AbstractServerTransport.TIMEOUT_OPTION, String.valueOf(timeout));
        options.put(AbstractHttpTransport.MAX_SESSIONS_PER_BROWSER_OPTION, "1");
        options.put(AbstractHttpTransport.MULTI_SESSION_INTERVAL_OPTION, String.valueOf(multiSessionInterval));
        startServer(options);
        AsyncJSONTransport transport = new AsyncJSONTransport(bayeux) {
            @Override
            public void handle(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
                // Just before handling the request, fake that it's HTTP/2.0.
                ((Request)request).setHttpVersion(HttpVersion.HTTP_2);
                super.handle(request, response);
            }

            @Override
            protected void write(HttpServletRequest request, HttpServletResponse response, ServerSessionImpl session, boolean scheduleExpiration, List<ServerMessage> messages, ServerMessage.Mutable[] replies) {
                // Just before writing the response, fake back that the request is HTTP/1.1,
                // otherwise the HTTP/1.1 generator does not generate the correct response.
                ((Request)request).setHttpVersion(HttpVersion.HTTP_1_1);
                super.write(request, response, session, scheduleExpiration, messages, replies);
            }
        };
        transport.init();
        bayeux.setTransports(transport);

        BayeuxClient client1 = newBayeuxClient();
        final ConcurrentLinkedQueue<Message> connects1 = new ConcurrentLinkedQueue<>();
        client1.getChannel(Channel.META_CONNECT).addListener(new ClientSessionChannel.MessageListener() {
            @Override
            public void onMessage(ClientSessionChannel channel, Message message) {
                if (message.isSuccessful()) {
                    connects1.offer(message);
                }
            }
        });
        client1.handshake();
        Assert.assertTrue(client1.waitFor(5000, BayeuxClient.State.CONNECTED));
        HttpCookie browserCookie = client1.getCookie("BAYEUX_BROWSER");
        Assert.assertNotNull(browserCookie);

        // Give some time to the first client to establish the long poll before the second client
        Thread.sleep(1000);

        BayeuxClient client2 = newBayeuxClient();
        final ConcurrentLinkedQueue<Message> connects2 = new ConcurrentLinkedQueue<>();
        client2.putCookie(browserCookie);
        client2.getChannel(Channel.META_CONNECT).addListener(new ClientSessionChannel.MessageListener() {
            @Override
            public void onMessage(ClientSessionChannel channel, Message message) {
                connects2.offer(message);
            }
        });
        client2.handshake();
        Assert.assertTrue(client2.waitFor(5000, BayeuxClient.State.CONNECTED));

        Thread.sleep(1000);

        BayeuxClient client3 = newBayeuxClient();
        final ConcurrentLinkedQueue<Message> connects3 = new ConcurrentLinkedQueue<>();
        client3.putCookie(browserCookie);
        client3.getChannel(Channel.META_CONNECT).addListener(new ClientSessionChannel.MessageListener() {
            @Override
            public void onMessage(ClientSessionChannel channel, Message message) {
                connects3.offer(message);
            }
        });
        client3.handshake();
        Assert.assertTrue(client3.waitFor(5000, BayeuxClient.State.CONNECTED));

        // Sleep for a while
        Thread.sleep(2 * multiSessionInterval);

        // All clients must remain in long poll mode.
        Assert.assertEquals(1, connects1.size());
        Assert.assertEquals(1, connects2.size());
        Assert.assertEquals(1, connects3.size());

        // Wait for clients to re-issue a long poll.
        Thread.sleep(timeout);

        // All clients must still be in long poll mode
        Assert.assertEquals(2, connects1.size());
        Assert.assertEquals(2, connects2.size());
        Assert.assertEquals(2, connects3.size());
        // None of the clients must have the multiple-clients advice.
        Message lastConnect = new LinkedList<>(connects1).getLast();
        Map<String, Object> advice = lastConnect.getAdvice();
        if (advice != null) {
            Assert.assertFalse(advice.containsKey("multiple-clients"));
        }

        disconnectBayeuxClient(client1);
        disconnectBayeuxClient(client2);
        disconnectBayeuxClient(client3);
    }
}