curator-master/curator-framework/src/test/java/org/apache/curator/framework/imps/TestMultiClient.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 java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.api.CuratorEvent;
import org.apache.curator.framework.api.CuratorEventType;
import org.apache.curator.framework.api.CuratorListener;
import org.apache.curator.retry.RetryOneTime;
import org.apache.curator.test.BaseClassForTests;
import org.apache.curator.utils.CloseableUtils;
import org.apache.zookeeper.Watcher;
import org.junit.jupiter.api.Test;

public class TestMultiClient extends BaseClassForTests {
    @Test
    public void testNotify() throws Exception {
        CuratorFramework client1 = null;
        CuratorFramework client2 = null;
        try {
            client1 = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            client2 = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));

            client1.start();
            client2.start();

            final CountDownLatch latch = new CountDownLatch(1);
            client1.getCuratorListenable().addListener(new CuratorListener() {
                @Override
                public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception {
                    if (event.getType() == CuratorEventType.WATCHED) {
                        if (event.getWatchedEvent().getType() == Watcher.Event.EventType.NodeDataChanged) {
                            if (event.getPath().equals("/test")) {
                                latch.countDown();
                            }
                        }
                    }
                }
            });

            client1.create().forPath("/test", new byte[] {1, 2, 3});
            client1.checkExists().watched().forPath("/test");

            client2.getCuratorListenable().addListener(new CuratorListener() {
                @Override
                public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception {
                    if (event.getType() == CuratorEventType.SYNC) {
                        client.setData().forPath("/test", new byte[] {10, 20});
                    }
                }
            });

            client2.sync().forPath("/test");

            assertTrue(latch.await(10, TimeUnit.SECONDS));
        } finally {
            CloseableUtils.closeQuietly(client1);
            CloseableUtils.closeQuietly(client2);
        }
    }
}
