Upload.java

/*
 * 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.local;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.Before;
import org.junit.Test;

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.conf.JobConf;
import com.aliyun.odps.mapred.local.utils.TestUtils;
import com.aliyun.odps.mapred.utils.InputUtils;
import com.aliyun.odps.mapred.utils.OutputUtils;
import com.aliyun.odps.mapred.utils.SchemaUtils;

/**
 * Example Class to add record to table from resource file.
 */
public class Upload {

  public static final Log LOG = LogFactory.getLog(Upload.class);

  @Before
  public void setUp() throws Exception {
    TestUtils.setEnvironment(TestUtils.odps_test_mrtask);
  }

  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 = new BufferedInputStream(new FileInputStream(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 {
        // try {
        if (bufferedInput != null) {
          bufferedInput.close(); // ???
        }
        // } catch (IOException ex) {
        // throw new IOException(ex);
        // }
      }

    }

    @Override
    public void map(long recordNum, Record record, TaskContext context)
        throws IOException {

    }

    @Override
    public void cleanup(TaskContext context) throws IOException {

    }

  }

  @Test
  public void test() throws Exception {

    String[] args = new String[2];
    args[0] = System.getProperty("user.dir")
              + "/warehouse/odps_test_mrtask/__tables__/upload_in/data";

    System.out.println(args[0]);
    args[1] = "upload_out";

    if (args.length != 2) {
      System.err.println("Usage: Upload <import_txt> <out_table>");
      System.exit(2);
    }

    JobConf job = new JobConf();

    job.setMapperClass(UploadMapper.class);

    job.set("import.filename", args[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);
  }

}