com.yahoo.storm.yarn.EmbeddedZKServer.java Source code

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Here is the source code for com.yahoo.storm.yarn.EmbeddedZKServer.java

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/*
 * Copyright (c) 2013 Yahoo! Inc. All Rights Reserved.
 *
 * 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. See accompanying LICENSE file.
 */
package com.yahoo.storm.yarn;

import java.io.File;
import java.io.IOException;
import java.net.BindException;
import java.net.InetSocketAddress;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.zookeeper.server.NIOServerCnxn.Factory;
import org.apache.zookeeper.server.ZooKeeperServer;

public class EmbeddedZKServer {

    private static final Log LOG = LogFactory.getLog(EmbeddedZKServer.class);
    private Factory zkFactory;
    private int zkport;

    void start() throws IOException, InterruptedException {
        LOG.info("Starting up embedded Zookeeper server");
        File localfile = new File("./target/zookeeper.data");
        ZooKeeperServer zkServer;
        zkServer = new ZooKeeperServer(localfile, localfile, 2000);
        for (zkport = 60000; true; zkport++)
            try {
                zkFactory = new Factory(new InetSocketAddress(zkport));
                break;
            } catch (BindException e) {
                if (zkport == 65535)
                    throw new IOException("Fail to find a port for Zookeeper server to bind");
            }
        LOG.info("Zookeeper port allocated:" + zkport);
        zkFactory.startup(zkServer);
    }

    int port() {
        return zkport;
    }

    void stop() {
        LOG.info("shutdown embedded zookeeper server with port " + zkport);
        zkFactory.shutdown();
        zkFactory = null;
    }
}