content: /*
   * 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 com.aliyun.odps.mapred.open.example;
  
  import java.io.BufferedInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  
  import com.aliyun.odps.data.Record;
  import com.aliyun.odps.data.TableInfo;
  import com.aliyun.odps.mapred.JobClient;
  import com.aliyun.odps.mapred.MapperBase;
  import com.aliyun.odps.mapred.TaskContext;
  import com.aliyun.odps.mapred.conf.JobConf;
  import com.aliyun.odps.mapred.utils.InputUtils;
  import com.aliyun.odps.mapred.utils.OutputUtils;
  import com.aliyun.odps.mapred.utils.SchemaUtils;
  
  /**
   * Upload
   * 
   * Import data from text file into table
   * 
   **/
  public class Upload {
  
    public static class UploadMapper extends MapperBase {
      @Override
      public void setup(TaskContext context) throws IOException {
        Record record = context.createOutputRecord();
        StringBuilder importdata = new StringBuilder();
        BufferedInputStream bufferedInput = null;
  
        try {
          byte[] buffer = new byte[1024];
          int bytesRead = 0;
  
          String filename = context.getJobConf().get("import.filename");
          bufferedInput = context.readResourceFileAsStream(filename);
  
          while ((bytesRead = bufferedInput.read(buffer)) != -1) {
            String chunk = new String(buffer, 0, bytesRead);
            importdata.append(chunk);
          }
  
          String lines[] = importdata.toString().split("\n");
          for (int i = 0; i < lines.length; i++) {
            String[] ss = lines[i].split(",");
            record.set(0, Long.parseLong(ss[0].trim()));
            record.set(1, ss[1].trim());
            context.write(record);
          }
        } catch (FileNotFoundException ex) {
          throw new IOException(ex);
        } catch (IOException ex) {
          throw new IOException(ex);
        } finally {
        }
  
      }
  
      @Override
      public void map(long recordNum, Record record, TaskContext context) throws IOException {
  
      }
  
    }
  
    public static void main(String[] args) throws Exception {
      if (args.length != 2) {
        System.err.println("Usage: Upload <import_txt> <out_table>");
        System.exit(2);
      }
  
      JobConf job = new JobConf();
  
      job.setMapperClass(UploadMapper.class);
  
      // 设置资源名字, 可以在map中通过jobconf获取到
      job.set("import.filename", args[0]);
  
      // maponly作业需要显式设置reducer的数目为0
      job.setNumReduceTasks(0);
  
      job.setMapOutputKeySchema(SchemaUtils.fromString("key:bigint"));
      job.setMapOutputValueSchema(SchemaUtils.fromString("value:string"));
  
      InputUtils.addTable(TableInfo.builder().tableName("mr_empty").build(), job);
      OutputUtils.addTable(TableInfo.builder().tableName(args[1]).build(), job);
  
      JobClient.runJob(job);
    }
  
  }
  