fr.jetoile.hadoopunit.component.ZookeeperBootstrap.java Source code

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Here is the source code for fr.jetoile.hadoopunit.component.ZookeeperBootstrap.java

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/*
 * 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 fr.jetoile.hadoopunit.component;

import com.github.sakserv.minicluster.impl.ZookeeperLocalCluster;
import fr.jetoile.hadoopunit.Component;
import fr.jetoile.hadoopunit.HadoopUnitConfig;
import fr.jetoile.hadoopunit.HadoopUtils;
import fr.jetoile.hadoopunit.exception.BootstrapException;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class ZookeeperBootstrap implements Bootstrap {
    final public static String NAME = Component.ZOOKEEPER.name();

    final private Logger LOGGER = LoggerFactory.getLogger(ZookeeperBootstrap.class);

    private ZookeeperLocalCluster zookeeperLocalCluster;

    private State state = State.STOPPED;

    private Configuration configuration;

    private int port;
    private String localDir;
    private String host;

    public ZookeeperBootstrap() {
        if (zookeeperLocalCluster == null) {
            try {
                loadConfig();
            } catch (BootstrapException e) {
                LOGGER.error("unable to load configuration", e);
            }

        }
    }

    @Override
    public String getName() {
        return NAME;
    }

    @Override
    public String getProperties() {
        return "[" + "host:" + host + ", port:" + port + "]";
    }

    private void loadConfig() throws BootstrapException {
        HadoopUtils.setHadoopHome();
        try {
            configuration = new PropertiesConfiguration(HadoopUnitConfig.DEFAULT_PROPS_FILE);
        } catch (ConfigurationException e) {
            throw new BootstrapException("bad config", e);
        }
        port = configuration.getInt(HadoopUnitConfig.ZOOKEEPER_PORT_KEY);
        localDir = configuration.getString(HadoopUnitConfig.ZOOKEEPER_TEMP_DIR_KEY);
        host = configuration.getString(HadoopUnitConfig.ZOOKEEPER_HOST_KEY);

    }

    private void init() {
        Path path = Paths.get(localDir);
        try {
            Files.createDirectories(path);
        } catch (IOException e) {
            LOGGER.error("unable to create mandatory directory", e);
        }

    }

    private void build() {
        zookeeperLocalCluster = new ZookeeperLocalCluster.Builder().setPort(port)
                .setZookeeperConnectionString(host + ":" + port).setTempDir(localDir).build();
    }

    @Override
    public Bootstrap start() {
        if (state == State.STOPPED) {
            state = State.STARTING;
            LOGGER.info("{} is starting", this.getClass().getName());
            init();
            build();
            try {
                zookeeperLocalCluster.start();
            } catch (Exception e) {
                LOGGER.error("unable to add zookeeper", e);
            }
            state = State.STARTED;
            LOGGER.info("{} is started", this.getClass().getName());
        }
        return this;
    }

    @Override
    public Bootstrap stop() {
        if (state == State.STARTED) {
            state = State.STOPPING;
            LOGGER.info("{} is stopping", this.getClass().getName());
            try {
                zookeeperLocalCluster.stop(true);
            } catch (Exception e) {
                LOGGER.error("unable to stop zookeeper", e);
            }
            state = State.STOPPED;
            LOGGER.info("{} is stopped", this.getClass().getName());
        }
        return this;
    }

    @Override
    public org.apache.hadoop.conf.Configuration getConfiguration() {
        throw new UnsupportedOperationException(
                "the method getConfiguration can not be called on ZookeeperBootstrap");
    }

}