com.netflix.curator.framework.recipes.barriers.TestDistributedBarrier.java Source code

Introduction

Here is the source code for com.netflix.curator.framework.recipes.barriers.TestDistributedBarrier.java

Source

/*
 * Copyright 2012 Netflix, Inc.
 *
 *    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 com.netflix.curator.framework.recipes.barriers;

import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;

import org.apache.commons.io.IOUtils;
import org.apache.zookeeper.KeeperException;
import org.testng.Assert;
import org.testng.annotations.Test;

import com.google.common.collect.Lists;
import com.netflix.curator.framework.CuratorFramework;
import com.netflix.curator.framework.CuratorFrameworkFactory;
import com.netflix.curator.framework.recipes.BaseClassForTests;
import com.netflix.curator.retry.RetryOneTime;

public class TestDistributedBarrier extends BaseClassForTests {
    @Test
    public void testServerCrash() throws Exception {
        final int TIMEOUT = 1000;

        final CuratorFramework client = CuratorFrameworkFactory.builder().connectString(server.getConnectString())
                .connectionTimeoutMs(TIMEOUT).retryPolicy(new RetryOneTime(1)).build();
        try {
            client.start();

            final DistributedBarrier barrier = new DistributedBarrier(client, "/barrier");
            barrier.setBarrier();

            final ExecutorService service = Executors.newSingleThreadExecutor();
            Future<Object> future = service.submit(new Callable<Object>() {
                @Override
                public Object call() throws Exception {
                    Thread.sleep(TIMEOUT / 2);
                    server.stop();
                    return null;
                }
            });

            barrier.waitOnBarrier(TIMEOUT * 2, TimeUnit.SECONDS);
            future.get();
            Assert.fail();
        } catch (KeeperException.ConnectionLossException expected) {
            // expected
        } finally {
            client.close();
        }
    }

    @Test
    public void testMultiClient() throws Exception {
        CuratorFramework client1 = null;
        CuratorFramework client2 = null;
        try {
            {
                CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(),
                        new RetryOneTime(1));
                try {
                    client.start();
                    DistributedBarrier barrier = new DistributedBarrier(client, "/barrier");
                    barrier.setBarrier();
                } finally {
                    IOUtils.closeQuietly(client);
                }
            }

            client1 = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            client2 = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));

            List<Future<Object>> futures = Lists.newArrayList();
            ExecutorService service = Executors.newCachedThreadPool();
            for (final CuratorFramework c : new CuratorFramework[] { client1, client2 }) {
                Future<Object> future = service.submit(new Callable<Object>() {
                    @Override
                    public Object call() throws Exception {
                        c.start();
                        DistributedBarrier barrier = new DistributedBarrier(c, "/barrier");
                        barrier.waitOnBarrier(10, TimeUnit.MILLISECONDS);
                        return null;
                    }
                });
                futures.add(future);
            }

            Thread.sleep(1000);
            {
                CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(),
                        new RetryOneTime(1));
                try {
                    client.start();
                    DistributedBarrier barrier = new DistributedBarrier(client, "/barrier");
                    barrier.removeBarrier();
                } finally {
                    IOUtils.closeQuietly(client);
                }
            }

            for (Future<Object> f : futures) {
                f.get();
            }
        } finally {
            IOUtils.closeQuietly(client1);
            IOUtils.closeQuietly(client2);
        }
    }

    @Test
    public void testNoBarrier() throws Exception {
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        try {
            client.start();

            final DistributedBarrier barrier = new DistributedBarrier(client, "/barrier");
            Assert.assertTrue(barrier.waitOnBarrier(10, TimeUnit.SECONDS));

            // just for grins, test the infinite wait
            ExecutorService service = Executors.newSingleThreadExecutor();
            Future<Object> future = service.submit(new Callable<Object>() {
                @Override
                public Object call() throws Exception {
                    barrier.waitOnBarrier();
                    return "";
                }
            });
            Assert.assertTrue(future.get(10, TimeUnit.SECONDS) != null);
        } finally {
            client.close();
        }
    }

    @Test
    public void testBasic() throws Exception {
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        try {
            client.start();

            final DistributedBarrier barrier = new DistributedBarrier(client, "/barrier");
            barrier.setBarrier();

            ExecutorService service = Executors.newSingleThreadExecutor();
            service.submit(new Callable<Object>() {
                @Override
                public Object call() throws Exception {
                    Thread.sleep(1000);
                    barrier.removeBarrier();
                    return null;
                }
            });

            Assert.assertTrue(barrier.waitOnBarrier(10, TimeUnit.SECONDS));
        } finally {
            client.close();
        }
    }
}