curator-x-async/src/test/java/org/apache/curator/framework/imps/TestAddWatch.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.curator.framework.imps;

import static org.junit.jupiter.api.Assertions.assertTrue;

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.RetryOneTime;
import org.apache.curator.test.compatibility.CuratorTestBase;
import org.apache.curator.utils.ZookeeperFactory;
import org.apache.curator.x.async.AsyncCuratorFramework;
import org.apache.zookeeper.AddWatchMode;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;
import org.junit.jupiter.api.Test;

import java.util.concurrent.CountDownLatch;

public class TestAddWatch extends CuratorTestBase
{
    @Test
    public void testPersistentRecursiveWatch() throws Exception
    {
        try ( CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)) )
        {
            client.start();
            client.blockUntilConnected();

            CountDownLatch latch = new CountDownLatch(5);
            Watcher watcher = event -> latch.countDown();
            AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client);
            async.addWatch().withMode(AddWatchMode.PERSISTENT_RECURSIVE).usingWatcher(watcher).forPath("/test").toCompletableFuture().get();

            client.create().forPath("/test");
            client.create().forPath("/test/a");
            client.create().forPath("/test/a/b");
            client.create().forPath("/test/a/b/c");
            client.create().forPath("/test/a/b/c/d");

            assertTrue(timing.awaitLatch(latch));
        }
    }

    @Test
    public void testPersistentRecursiveDefaultWatch() throws Exception
    {
        CountDownLatch latch = new CountDownLatch(6);   // 5 creates plus the initial sync
        ZookeeperFactory zookeeperFactory = (connectString, sessionTimeout, watcher, canBeReadOnly) -> {
            Watcher actualWatcher = event -> {
                watcher.process(event);
                latch.countDown();
            };
            return new ZooKeeper(connectString, sessionTimeout, actualWatcher);
        };
        try (CuratorFramework client = CuratorFrameworkFactory.builder().connectString(server.getConnectString()).retryPolicy(new RetryOneTime(1)).zookeeperFactory(zookeeperFactory).build() )
        {
            client.start();
            client.blockUntilConnected();

            AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client);
            async.addWatch().withMode(AddWatchMode.PERSISTENT_RECURSIVE).forPath("/test");

            client.create().forPath("/test");
            client.create().forPath("/test/a");
            client.create().forPath("/test/a/b");
            client.create().forPath("/test/a/b/c");
            client.create().forPath("/test/a/b/c/d");

            assertTrue(timing.awaitLatch(latch));
        }
    }
}