[GitHub] incubator-carbondata pull request #310: [CARBONDATA-401] One Pass Load

[qiuchenjian-2]

Github user jackylk commented on a diff in the pull request:

    https://github.com/apache/incubator-carbondata/pull/310#discussion_r92759097
 
    --- Diff: core/src/main/java/org/apache/carbondata/core/dictionary/client/DictionaryClientHandler.java ---
    @@ -0,0 +1,103 @@
    +/*
    + * 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.client;
    +
    +import java.util.Map;
    +import java.util.concurrent.BlockingQueue;
    +import java.util.concurrent.ConcurrentHashMap;
    +import java.util.concurrent.LinkedBlockingQueue;
    +
    +import org.apache.carbondata.core.dictionary.generator.key.DictionaryKey;
    +
    +import com.alibaba.fastjson.JSON;
    +
    +import org.jboss.netty.channel.*;
    +
    +/**
    + * Client handler to get data.
    + */
    +public class DictionaryClientHandler extends SimpleChannelHandler {
    +
    +  final Map<String, BlockingQueue<DictionaryKey>> dictKeyQueueMap = new ConcurrentHashMap<>();
    +
    +  private ChannelHandlerContext ctx;
    +
    +  private Object lock = new Object();
    +
    +  @Override
    +  public void channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception {
    +    this.ctx = ctx;
    +    System.out.println("Connected " + ctx.getHandler());
    +    super.channelConnected(ctx, e);
    +  }
    +
    +  @Override
    +  public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
    +    String backkeyString = (String) e.getMessage();
    +    DictionaryKey key = JSON.parseObject(backkeyString, DictionaryKey.class);
    +    BlockingQueue<DictionaryKey> dictKeyQueue = dictKeyQueueMap.get(key.getThreadNo());
    +    dictKeyQueue.offer(key);
    +    super.messageReceived(ctx, e);
    +  }
    +
    +  @Override
    +  public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception {
    +    System.out.println("exceptionCaught");
    +    ctx.getChannel().close();
    +  }
    +
    +  /**
    +   * client send request to server
    +   *
    +   * @param key
    +   * @return
    +   */
    +  public DictionaryKey getDictionary(DictionaryKey key) {
    +    DictionaryKey dictionaryKey;
    +    BlockingQueue<DictionaryKey> dictKeyQueue = null;
    +    try {
    +      synchronized (lock) {
    +        dictKeyQueue = dictKeyQueueMap.get(key.getThreadNo());
    +        if (dictKeyQueue == null) {
    +          dictKeyQueue = new LinkedBlockingQueue<DictionaryKey>();
    +          dictKeyQueueMap.put(key.getThreadNo(), dictKeyQueue);
    +        }
    +      }
    +      String keyString = JSON.toJSONString(key);
    +      ctx.getChannel().write(keyString);
    +    } catch (Exception e) {
    +      e.printStackTrace();
    --- End diff --
   
    should use LOGGER


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