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.IOException;
  import java.util.Iterator;
  import java.util.LinkedHashMap;
  
  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.ReducerBase;
  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;
  
  /**
   * Multi input & output example.
   * 
   **/
  public class MultipleInOut {
  
    public static class TokenizerMapper extends MapperBase {
      Record word;
      Record one;
  
      @Override
      public void setup(TaskContext context) throws IOException {
        word = context.createMapOutputKeyRecord();
        one = context.createMapOutputValueRecord();
        one.set(new Object[] {1L});
      }
  
      @Override
      public void map(long recordNum, Record record, TaskContext context) throws IOException {
        for (int i = 0; i < record.getColumnCount(); i++) {
          word.set(new Object[] {record.get(i).toString()});
          context.write(word, one);
        }
      }
    }
  
    public static class SumReducer extends ReducerBase {
      private Record result;
      private Record result1;
      private Record result2;
  
      @Override
      public void setup(TaskContext context) throws IOException {
        // 对于不同的输出需要创建不同的record，通过label来区分
        result = context.createOutputRecord();
        result1 = context.createOutputRecord("out1");
        result2 = context.createOutputRecord("out2");
      }
  
      @Override
      public void reduce(Record key, Iterator<Record> values, TaskContext context) throws IOException {
        long count = 0;
        while (values.hasNext()) {
          Record val = values.next();
          count += (Long) val.get(0);
        }
  
        long mod = count % 3;
        if (mod == 0) {
          result.set(0, key.get(0));
          result.set(1, count);
          // 不指定label，输出的默认(default)输出
          context.write(result);
        } else if (mod == 1) {
          result1.set(0, key.get(0));
          result1.set(1, count);
          context.write(result1, "out1");
        } else {
          result2.set(0, key.get(0));
          result2.set(1, count);
          context.write(result2, "out2");
        }
      }
  
      @Override
      public void cleanup(TaskContext context) throws IOException {
        Record result = context.createOutputRecord();
  
        result.set(0, "default");
        result.set(1, 1L);
        context.write(result);
  
        Record result1 = context.createOutputRecord("out1");
        result1.set(0, "out1");
        result1.set(1, 1L);
        context.write(result1, "out1");
  
        Record result2 = context.createOutputRecord("out2");
        result2.set(0, "out1");
        result2.set(1, 1L);
        context.write(result2, "out2");
      }
    }
  
    // 将分区字符串如"ds=1/pt=2"转为map的形式
    public static LinkedHashMap<String, String> convertPartSpecToMap(String partSpec) {
      LinkedHashMap<String, String> map = new LinkedHashMap<String, String>();
      if (partSpec != null && !partSpec.trim().isEmpty()) {
        String[] parts = partSpec.split("/");
        for (String part : parts) {
          String[] ss = part.split("=");
          if (ss.length != 2) {
            throw new RuntimeException("ODPS-0730001: error part spec format: " + partSpec);
          }
          map.put(ss[0], ss[1]);
        }
      }
      return map;
    }
  
    public static void main(String[] args) throws Exception {
  
      String[] inputs = null;
      String[] outputs = null;
      if (args.length == 2) {
        inputs = args[0].split(",");
        outputs = args[1].split(",");
      } else {
        System.err.println("MultipleInOut in... out...");
        System.exit(1);
      }
  
      JobConf job = new JobConf();
  
      job.setMapperClass(TokenizerMapper.class);
      job.setReducerClass(SumReducer.class);
  
      job.setMapOutputKeySchema(SchemaUtils.fromString("word:string"));
      job.setMapOutputValueSchema(SchemaUtils.fromString("count:bigint"));
  
      // 解析用户的输入表字符串
      for (String in : inputs) {
        String[] ss = in.split("\\|");
        if (ss.length == 1) {
          InputUtils.addTable(TableInfo.builder().tableName(ss[0]).build(), job);
        } else if (ss.length == 2) {
          LinkedHashMap<String, String> map = convertPartSpecToMap(ss[1]);
          InputUtils.addTable(TableInfo.builder().tableName(ss[0]).partSpec(map).build(), job);
        } else {
          System.err.println("Style of input: " + in + " is not right");
          System.exit(1);
        }
      }
  
      // 解析用户的输出表字符串
      for (String out : outputs) {
        String[] ss = out.split("\\|");
        if (ss.length == 1) {
          OutputUtils.addTable(TableInfo.builder().tableName(ss[0]).build(), job);
        } else if (ss.length == 2) {
          LinkedHashMap<String, String> map = convertPartSpecToMap(ss[1]);
          OutputUtils.addTable(TableInfo.builder().tableName(ss[0]).partSpec(map).build(), job);
        } else if (ss.length == 3) {
          if (ss[1].isEmpty()) {
            LinkedHashMap<String, String> map = convertPartSpecToMap(ss[2]);
            OutputUtils.addTable(TableInfo.builder().tableName(ss[0]).partSpec(map).build(), job);
          } else {
            LinkedHashMap<String, String> map = convertPartSpecToMap(ss[1]);
            OutputUtils.addTable(TableInfo.builder().tableName(ss[0]).partSpec(map).label(ss[2])
                .build(), job);
          }
        } else {
          System.err.println("Style of output: " + out + " is not right");
          System.exit(1);
        }
      }
  
      JobClient.runJob(job);
    }
  
  }
  