com.netflix.curator.framework.imps.TestFrameworkBackground.java Source code

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Here is the source code for com.netflix.curator.framework.imps.TestFrameworkBackground.java

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/*
 * 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.imps;

import java.util.Arrays;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicLong;

import org.apache.commons.io.IOUtils;
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.api.BackgroundCallback;
import com.netflix.curator.framework.api.CuratorEvent;
import com.netflix.curator.retry.RetryNTimes;
import com.netflix.curator.retry.RetryOneTime;
import com.netflix.curator.test.Timing;

public class TestFrameworkBackground extends BaseClassForTests {
    @Test
    public void testRetries() throws Exception {
        final int SLEEP = 1000;
        final int TIMES = 5;

        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(),
                timing.connection(), new RetryNTimes(TIMES, SLEEP));
        try {
            client.start();
            client.getZookeeperClient().blockUntilConnectedOrTimedOut();

            final CountDownLatch latch = new CountDownLatch(TIMES);
            final List<Long> times = Lists.newArrayList();
            final AtomicLong start = new AtomicLong(System.currentTimeMillis());
            ((CuratorFrameworkImpl) client).debugListener = new CuratorFrameworkImpl.DebugBackgroundListener() {
                @Override
                public void listen(OperationAndData<?> data) {
                    if (data.getOperation().getClass().getName().contains("CreateBuilderImpl")) {
                        long now = System.currentTimeMillis();
                        times.add(now - start.get());
                        start.set(now);
                        latch.countDown();
                    }
                }
            };

            server.stop();
            client.create().inBackground().forPath("/one");

            latch.await();

            for (long elapsed : times.subList(1, times.size())) // first one isn't a retry
            {
                Assert.assertTrue(elapsed >= SLEEP, elapsed + ": " + times);
            }
        } finally {
            IOUtils.closeQuietly(client);
        }
    }

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

            final CountDownLatch latch = new CountDownLatch(3);
            final List<String> paths = Lists.newArrayList();
            BackgroundCallback callback = new BackgroundCallback() {
                @Override
                public void processResult(CuratorFramework client, CuratorEvent event) throws Exception {
                    paths.add(event.getPath());
                    latch.countDown();
                }
            };
            client.create().inBackground(callback).forPath("/one");
            client.create().inBackground(callback).forPath("/one/two");
            client.create().inBackground(callback).forPath("/one/two/three");

            latch.await();

            Assert.assertEquals(paths, Arrays.asList("/one", "/one/two", "/one/two/three"));
        } finally {
            IOUtils.closeQuietly(client);
        }
    }
}