com.netflix.curator.framework.recipes.queue.TestDistributedIdQueue.java Source code

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Here is the source code for com.netflix.curator.framework.recipes.queue.TestDistributedIdQueue.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.recipes.queue;

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

import org.apache.commons.io.IOUtils;
import org.mockito.Mockito;
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.framework.state.ConnectionState;
import com.netflix.curator.framework.state.ConnectionStateListener;
import com.netflix.curator.retry.RetryOneTime;

@SuppressWarnings({ "SynchronizationOnLocalVariableOrMethodParameter" })
public class TestDistributedIdQueue extends BaseClassForTests {
    private static final String QUEUE_PATH = "/a/queue";

    private static final QueueSerializer<TestQueueItem> serializer = new QueueItemSerializer();

    @Test
    public void testDeletingWithLock() throws Exception {
        DistributedIdQueue<TestQueueItem> queue = null;
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        client.start();
        try {
            final CountDownLatch consumingLatch = new CountDownLatch(1);
            final CountDownLatch waitLatch = new CountDownLatch(1);
            QueueConsumer<TestQueueItem> consumer = new QueueConsumer<TestQueueItem>() {
                @Override
                public void consumeMessage(TestQueueItem message) throws Exception {
                    consumingLatch.countDown();
                    waitLatch.await();
                }

                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState) {
                }
            };

            queue = QueueBuilder.builder(client, consumer, serializer, QUEUE_PATH).lockPath("/locks")
                    .buildIdQueue();
            queue.start();

            queue.put(new TestQueueItem("test"), "id");

            Assert.assertTrue(consumingLatch.await(10, TimeUnit.SECONDS)); // wait until consumer has it
            Assert.assertEquals(queue.remove("id"), 0);

            waitLatch.countDown();
        } finally {
            IOUtils.closeQuietly(queue);
            IOUtils.closeQuietly(client);
        }
    }

    @Test
    public void testOrdering() throws Exception {
        final int ITEM_QTY = 100;

        DistributedIdQueue<TestQueueItem> queue = null;
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        client.start();
        try {
            BlockingQueueConsumer<TestQueueItem> consumer = new BlockingQueueConsumer<TestQueueItem>(
                    Mockito.mock(ConnectionStateListener.class));

            queue = QueueBuilder.builder(client, consumer, serializer, QUEUE_PATH).buildIdQueue();
            queue.start();

            List<String> ids = Lists.newArrayList();
            for (int i = 0; i < ITEM_QTY; ++i) {
                String id = Double.toString(Math.random());
                ids.add(id);
                queue.put(new TestQueueItem(id), id);
            }

            int iteration = 0;
            while (consumer.size() < ITEM_QTY) {
                Assert.assertTrue(++iteration < ITEM_QTY);
                Thread.sleep(1000);
            }

            int i = 0;
            for (TestQueueItem item : consumer.getItems()) {
                Assert.assertEquals(item.str, ids.get(i++));
            }
        } finally {
            IOUtils.closeQuietly(queue);
            IOUtils.closeQuietly(client);
        }
    }
}