org.deeplearning4j.scaleout.zookeeper.ZookeeperBuilder.java Source code

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Here is the source code for org.deeplearning4j.scaleout.zookeeper.ZookeeperBuilder.java

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/*
 *
 *  * 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.scaleout.zookeeper;

import java.io.IOException;

import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.Watcher.Event.KeeperState;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.ZooKeeper.States;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * ZooKeeper client builder with default host of local host, port 2181, and timeout of 1000
 * @author Adam Gibson
 *
 */
public class ZookeeperBuilder implements Watcher {
    private String host;
    private int port;
    private int timeout;
    private Watcher watcher;
    private ZooKeeper keeper;
    private static final Logger log = LoggerFactory.getLogger(ZookeeperBuilder.class);

    public ZookeeperBuilder() {
        host = "localhost";
        port = 2181;
        timeout = 10000;

    }

    public ZooKeeper build() {
        try {
            keeper = new ZooKeeper(host + ":" + port, timeout, this);
            while (keeper.getState() != States.CONNECTED) {
                Thread.sleep(15000);
                log.info("Waiting to connect to zookeeper");
            }
            return keeper;
        } catch (IOException e) {
            throw new RuntimeException(e);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            return null;
        }

    }

    public ZookeeperBuilder setWatcher(Watcher watcher) {
        this.watcher = watcher;
        return this;
    }

    public ZookeeperBuilder setPort(int port) {
        this.port = port;
        return this;
    }

    public ZookeeperBuilder setHost(String host) {
        this.host = host;
        return this;
    }

    public ZookeeperBuilder setSessionTimeout(int timeout) {
        this.timeout = timeout;
        return this;
    }

    @Override
    public void process(WatchedEvent event) {
        if (event.getState() == KeeperState.SyncConnected) {
            log.info("Synced");
        } else if (event.getState() == KeeperState.Disconnected) {
            keeper = build();
        } else if (event.getState() == KeeperState.Expired) {
            keeper = build();
        }
        if (watcher != null)
            watcher.process(event);
        log.info("Processed event...");
    }

}