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Java example source code file (TestZookeeperRegister.java)

This example Java source code file (TestZookeeperRegister.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

after, configuration, event, exception, ignore, logger, override, port, stat, string, testingserver, util, watcher, zookeeperconfigurationregister, zookeeperconfigurationretriever

The TestZookeeperRegister.java Java example source code

 *  * Copyright 2015 Skymind,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 org.deeplearning4j.zookeeper;

import static org.junit.Assert.assertEquals;
import static org.junit.Assume.assumeNotNull;

import java.io.IOException;
import java.util.Arrays;

import org.apache.curator.test.TestingServer;
import org.apache.zookeeper.KeeperException.NoNodeException;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;
import org.canova.api.conf.Configuration;
import org.deeplearning4j.scaleout.zookeeper.ZooKeeperConfigurationRegister;
import org.deeplearning4j.scaleout.zookeeper.ZookeeperBuilder;
import org.deeplearning4j.scaleout.zookeeper.ZookeeperConfigurationRetriever;
import org.deeplearning4j.scaleout.zookeeper.ZookeeperPathBuilder;
import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TestZookeeperRegister {
	private static final Logger log = LoggerFactory.getLogger(TestZookeeperRegister.class);
	private ZooKeeper keeper;
	private Configuration conf;
	private ZooKeeperConfigurationRegister register;
	private ZookeeperConfigurationRetriever retriever;
	private TestingServer server;

	public void init() throws Exception {
		conf = new Configuration();
		try {
			server = new TestingServer(2181);
		}catch(Exception e) {
			log.warn("Port already taken; using current zookeeper");
		String host = "localhost";
		keeper = new ZookeeperBuilder().setHost(host).build();
		register = new ZooKeeperConfigurationRegister(conf, "test","localhost",2181);
		retriever = new ZookeeperConfigurationRetriever(host, 2181,"test");


	public void testPathBuilder() {
		String expected = "/testhadoop:2181/tmp";
		assertEquals(expected,new ZookeeperPathBuilder().setHost("testhadoop").setPort(2181).addPath("tmp").build());

	public void testZookeeperRegister() throws Exception {

	public void testZookeeper() throws Exception {
		String host = "localhost";

		String path = new ZookeeperPathBuilder().setHost(host).setPort(2181).addPaths(Arrays.asList("tmp","test")).build();

		assumeNotNull(keeper.getData(path, new Watcher() {

			public void process(WatchedEvent event) {
				log.info("Event " + event);


		}, new Stat()));

        Configuration retrieve = retriever.retrieve();

		keeper.delete(path, -1);


	public void after() throws IOException {


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