HandshakeReconnectTest.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.tests;

import java.util.Map;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import org.cometd.bayeux.Channel;
import org.cometd.bayeux.Message;
import org.cometd.bayeux.client.ClientSessionChannel;
import org.cometd.bayeux.server.BayeuxServer;
import org.cometd.bayeux.server.ServerMessage;
import org.cometd.bayeux.server.ServerSession;
import org.cometd.client.BayeuxClient;
import org.cometd.server.AbstractServerTransport;
import org.junit.Assert;
import org.junit.Test;

public class HandshakeReconnectTest extends AbstractClientServerTest {
    public HandshakeReconnectTest(Transport transport) {
        super(transport);
    }

    @Test
    public void testReconnectUsingHandshake() throws Exception {
        long timeout = 1500;
        long maxInterval = 2000;
        Map<String, String> options = serverOptions();
        options.put(AbstractServerTransport.HANDSHAKE_RECONNECT_OPTION, String.valueOf(true));
        options.put(AbstractServerTransport.TIMEOUT_OPTION, String.valueOf(timeout));
        options.put(AbstractServerTransport.MAX_INTERVAL_OPTION, String.valueOf(maxInterval));
        startServer(options);

        BayeuxClient client = newBayeuxClient();
        client.handshake();
        Assert.assertTrue(client.waitFor(5000, BayeuxClient.State.CONNECTED));

        // Wait for the /meta/connect to be held.
        Thread.sleep(1000);

        // Stop the connector try to reconnect
        int port = connector.getLocalPort();
        connector.stop();

        // Add a /meta/handshake listener to be sure we reconnect using handshake.
        final CountDownLatch handshakeReconnect = new CountDownLatch(1);
        client.getChannel(Channel.META_HANDSHAKE).addListener(new ClientSessionChannel.MessageListener() {
            @Override
            public void onMessage(ClientSessionChannel channel, Message message) {
                // Reconnecting using handshake, first failure.
                if (!message.isSuccessful()) {
                    handshakeReconnect.countDown();
                }
            }
        });

        // Wait for the session to be swept (timeout + maxInterval).
        final CountDownLatch sessionRemoved = new CountDownLatch(1);
        bayeux.addListener(new BayeuxServer.SessionListener() {
            @Override
            public void sessionAdded(ServerSession session, ServerMessage message) {
            }

            @Override
            public void sessionRemoved(ServerSession session, boolean timedout) {
                sessionRemoved.countDown();
            }
        });

        Assert.assertTrue(sessionRemoved.await(timeout + 2 * maxInterval, TimeUnit.MILLISECONDS));
        Assert.assertTrue(handshakeReconnect.await(10 * client.getBackoffIncrement(), TimeUnit.MILLISECONDS));

        // Restart the connector.
        connector.setPort(port);
        connector.start();

        Assert.assertTrue(client.waitFor(20 * client.getBackoffIncrement(), BayeuxClient.State.CONNECTED));

        disconnectBayeuxClient(client);
    }
}