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From sounakr <...@git.apache.org>
Subject [GitHub] carbondata pull request #1152: [CARBONDATA-1288] Secure Dictionary Server Im...
Date Wed, 12 Jul 2017 09:29:45 GMT
Github user sounakr commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/1152#discussion_r126906057
  
    --- Diff: core/src/main/java/org/apache/carbondata/core/dictionary/server/NonSecureDictionaryServer.java
---
    @@ -0,0 +1,247 @@
    +/*
    + * 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.carbondata.core.dictionary.server;
    +
    +import java.net.Inet4Address;
    +import java.net.InetAddress;
    +import java.net.InetSocketAddress;
    +import java.net.NetworkInterface;
    +import java.net.SocketException;
    +import java.net.UnknownHostException;
    +import java.util.ArrayList;
    +import java.util.Collections;
    +import java.util.Enumeration;
    +import java.util.List;
    +
    +import org.apache.carbondata.common.logging.LogService;
    +import org.apache.carbondata.common.logging.LogServiceFactory;
    +import org.apache.carbondata.core.constants.CarbonCommonConstants;
    +import org.apache.carbondata.core.dictionary.generator.key.DictionaryMessage;
    +import org.apache.carbondata.core.dictionary.generator.key.DictionaryMessageType;
    +import org.apache.carbondata.core.util.CarbonProperties;
    +
    +
    +import io.netty.bootstrap.ServerBootstrap;
    +import io.netty.channel.ChannelInitializer;
    +import io.netty.channel.ChannelOption;
    +import io.netty.channel.ChannelPipeline;
    +import io.netty.channel.EventLoopGroup;
    +import io.netty.channel.nio.NioEventLoopGroup;
    +import io.netty.channel.socket.SocketChannel;
    +import io.netty.channel.socket.nio.NioServerSocketChannel;
    +import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
    +import org.apache.commons.lang3.SystemUtils;
    +import org.apache.spark.SparkConf;
    +
    +/**
    + * Dictionary Server to generate dictionary keys.
    + */
    +public class NonSecureDictionaryServer implements DictionaryServer {
    +
    +  private static final LogService LOGGER =
    +      LogServiceFactory.getLogService(NonSecureDictionaryServer.class.getName());
    +
    +  private NonSecureDictionaryServerHandler nonSecureDictionaryServerHandler;
    +
    +  private EventLoopGroup boss;
    +  private EventLoopGroup worker;
    +  private int port;
    +  private String host;
    +  private static Object lock = new Object();
    +  private static NonSecureDictionaryServer INSTANCE = null;
    +
    +  private NonSecureDictionaryServer(int port) {
    +    startServer(null, null, port);
    +  }
    +
    +  public static DictionaryServer getInstance(int port) {
    +    if (INSTANCE == null) {
    +      synchronized (lock) {
    +        if (INSTANCE == null) {
    +          INSTANCE = new NonSecureDictionaryServer(port);
    +        }
    +      }
    +    }
    +    return INSTANCE;
    +  }
    +
    +  /**
    +   * start dictionary server
    +   *
    +   * @param port
    +   */
    +  @Override public void startServer(SparkConf conf, String host, int port) {
    +    nonSecureDictionaryServerHandler = new NonSecureDictionaryServerHandler();
    +    String workerThreads = CarbonProperties.getInstance()
    +        .getProperty(CarbonCommonConstants.DICTIONARY_WORKER_THREADS,
    +            CarbonCommonConstants.DICTIONARY_WORKER_THREADS_DEFAULT);
    +    boss = new NioEventLoopGroup(1);
    +    worker = new NioEventLoopGroup(Integer.parseInt(workerThreads));
    +    // Configure the server.
    +    bindToPort(null, host, port);
    +  }
    +
    +  /**
    +   * Binds dictionary server to an available port.
    +   *
    +   * @param port
    +   */
    +  @Override public void bindToPort(SparkConf orgConf, String host, int port) {
    +    long start = System.currentTimeMillis();
    +    // Configure the server.
    +    int i = 0;
    +    while (i < 10) {
    +      int newPort = port + i;
    +      try {
    +        ServerBootstrap bootstrap = new ServerBootstrap();
    +        bootstrap.group(boss, worker);
    +        bootstrap.channel(NioServerSocketChannel.class);
    +        bootstrap.childHandler(new ChannelInitializer<SocketChannel>() {
    +          @Override public void initChannel(SocketChannel ch) throws Exception {
    +            ChannelPipeline pipeline = ch.pipeline();
    +            pipeline
    +                .addLast("LengthDecoder", new LengthFieldBasedFrameDecoder(1048576, 0,
2, 0, 2));
    +            pipeline.addLast("NonSecureDictionaryServerHandler", nonSecureDictionaryServerHandler);
    +          }
    +        });
    +        bootstrap.childOption(ChannelOption.SO_KEEPALIVE, true);
    +        String hostToBind = findLocalIpAddress();
    +        InetSocketAddress address = hostToBind == null ?
    +            new InetSocketAddress(newPort) :
    +            new InetSocketAddress(hostToBind, newPort);
    +        bootstrap.bind(address).sync();
    +        LOGGER.audit("Dictionary Server started, Time spent " + (System.currentTimeMillis()
- start)
    +            + " Listening on port " + newPort);
    +        this.port = newPort;
    +        this.host = hostToBind;
    +        break;
    +      } catch (Exception e) {
    +        LOGGER.error(e, "Dictionary Server Failed to bind to port:");
    +        if (i == 9) {
    +          throw new RuntimeException("Dictionary Server Could not bind to any port");
    +        }
    +      }
    +      i++;
    +    }
    +  }
    +
    +  /**
    +   * @return Port on which the NonSecureDictionaryServer has started.
    +   */
    +  @Override public int getPort() {
    +    return port;
    +  }
    +
    +  @Override public String getHost() {
    +    return host;
    +  }
    +
    +  @Override public String getSecretKey() {
    +    return null;
    +  }
    +
    +  /**
    +   * shutdown dictionary server
    +   *
    +   * @throws Exception
    +   */
    +  @Override public void shutdown() throws Exception {
    +    LOGGER.info("Shutting down dictionary server");
    +    worker.shutdownGracefully();
    +    boss.shutdownGracefully();
    +  }
    +
    +  /**
    +   * Write dictionary to the store.
    +   *
    +   * @throws Exception
    +   */
    +  @Override
    +  public void writeDictionary() throws Exception {
    +    DictionaryMessage key = new DictionaryMessage();
    +    key.setType(DictionaryMessageType.WRITE_DICTIONARY);
    +    nonSecureDictionaryServerHandler.processMessage(key);
    +  }
    +
    +  /**
    +   * Write Dictionary for one table.
    +   *
    +   * @throws Exception
    +   */
    +
    +  @Override
    +  public void writeTableDictionary(String uniqueTableName) throws Exception {
    +    DictionaryMessage key = new DictionaryMessage();
    +    key.setTableUniqueName(uniqueTableName);
    +    key.setType(DictionaryMessageType.WRITE_TABLE_DICTIONARY);
    +    nonSecureDictionaryServerHandler.processMessage(key);
    +  }
    +
    +  @Override public String findLocalIpAddress() {
    --- End diff --
    
    All cannot be moved as some of the class belongs to Spark2 and some in Core.


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