org.apache.hadoop.mapreduce.lib.db.DBConfiguration Java Examples

The following examples show how to use org.apache.hadoop.mapreduce.lib.db.DBConfiguration. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: HadoopFormatIO.java    From beam with Apache License 2.0 6 votes vote down vote up 
/**
 * Validates that the mandatory configuration properties such as InputFormat class, InputFormat
 * key and value classes are provided in the Hadoop configuration. In case of using {@code
 * DBInputFormat} you need to order results by one or more keys. It can be done by setting
 * configuration option "mapreduce.jdbc.input.orderby".
 */
private void validateConfiguration(Configuration configuration) {
  checkArgument(configuration != null, "configuration can not be null");
  checkArgument(
      configuration.get("mapreduce.job.inputformat.class") != null,
      "Configuration must contain \"mapreduce.job.inputformat.class\"");
  checkArgument(
      configuration.get("key.class") != null, "configuration must contain \"key.class\"");
  checkArgument(
      configuration.get("value.class") != null, "configuration must contain \"value.class\"");
  if (configuration.get("mapreduce.job.inputformat.class").endsWith("DBInputFormat")) {
    checkArgument(
        configuration.get(DBConfiguration.INPUT_ORDER_BY_PROPERTY) != null,
        "Configuration must contain \""
            + DBConfiguration.INPUT_ORDER_BY_PROPERTY
            + "\" when using DBInputFormat");
  }
}
Example #2
Source File: HadoopFormatIOIT.java    From beam with Apache License 2.0 5 votes vote down vote up 
private static void setupHadoopConfiguration(PostgresIOTestPipelineOptions options) {
  Configuration conf = new Configuration();
  DBConfiguration.configureDB(
      conf,
      "org.postgresql.Driver",
      DatabaseTestHelper.getPostgresDBUrl(options),
      options.getPostgresUsername(),
      options.getPostgresPassword());

  conf.set(DBConfiguration.INPUT_TABLE_NAME_PROPERTY, tableName);
  conf.setStrings(DBConfiguration.INPUT_FIELD_NAMES_PROPERTY, "id", "name");
  conf.set(DBConfiguration.INPUT_ORDER_BY_PROPERTY, "id ASC");
  conf.setClass(DBConfiguration.INPUT_CLASS_PROPERTY, TestRowDBWritable.class, DBWritable.class);

  conf.setClass("key.class", LongWritable.class, Object.class);
  conf.setClass("value.class", TestRowDBWritable.class, Object.class);
  conf.setClass("mapreduce.job.inputformat.class", DBInputFormat.class, InputFormat.class);

  conf.set(DBConfiguration.OUTPUT_TABLE_NAME_PROPERTY, tableName);
  conf.set(DBConfiguration.OUTPUT_FIELD_COUNT_PROPERTY, "2");
  conf.setStrings(DBConfiguration.OUTPUT_FIELD_NAMES_PROPERTY, "id", "name");

  conf.setClass(HadoopFormatIO.OUTPUT_KEY_CLASS, TestRowDBWritable.class, Object.class);
  conf.setClass(HadoopFormatIO.OUTPUT_VALUE_CLASS, NullWritable.class, Object.class);
  conf.setClass(
      HadoopFormatIO.OUTPUT_FORMAT_CLASS_ATTR, DBOutputFormat.class, OutputFormat.class);
  conf.set(HadoopFormatIO.JOB_ID, String.valueOf(1));

  hadoopConfiguration = new SerializableConfiguration(conf);
}
Example #3
Source File: DBCountPageView.java    From hadoop with Apache License 2.0 4 votes vote down vote up 
@Override
//Usage DBCountPageView [driverClass dburl]
public int run(String[] args) throws Exception {
  
  String driverClassName = DRIVER_CLASS;
  String url = DB_URL;
  
  if(args.length > 1) {
    driverClassName = args[0];
    url = args[1];
  }
  
  initialize(driverClassName, url);
  Configuration conf = getConf();

  DBConfiguration.configureDB(conf, driverClassName, url);

  Job job = new Job(conf);
      
  job.setJobName("Count Pageviews of URLs");
  job.setJarByClass(DBCountPageView.class);
  job.setMapperClass(PageviewMapper.class);
  job.setCombinerClass(LongSumReducer.class);
  job.setReducerClass(PageviewReducer.class);

  DBInputFormat.setInput(job, AccessRecord.class, "Access"
      , null, "url", AccessFieldNames);

  DBOutputFormat.setOutput(job, "Pageview", PageviewFieldNames);
  
  job.setMapOutputKeyClass(Text.class);
  job.setMapOutputValueClass(LongWritable.class);

  job.setOutputKeyClass(PageviewRecord.class);
  job.setOutputValueClass(NullWritable.class);
  int ret;
  try {
    ret = job.waitForCompletion(true) ? 0 : 1;
    boolean correct = verify();
    if(!correct) {
      throw new RuntimeException("Evaluation was not correct!");
    }
  } finally {
    shutdown();    
  }
  return ret;
}
Example #4
Source File: DBCountPageView.java    From big-c with Apache License 2.0 4 votes vote down vote up 
@Override
//Usage DBCountPageView [driverClass dburl]
public int run(String[] args) throws Exception {
  
  String driverClassName = DRIVER_CLASS;
  String url = DB_URL;
  
  if(args.length > 1) {
    driverClassName = args[0];
    url = args[1];
  }
  
  initialize(driverClassName, url);
  Configuration conf = getConf();

  DBConfiguration.configureDB(conf, driverClassName, url);

  Job job = new Job(conf);
      
  job.setJobName("Count Pageviews of URLs");
  job.setJarByClass(DBCountPageView.class);
  job.setMapperClass(PageviewMapper.class);
  job.setCombinerClass(LongSumReducer.class);
  job.setReducerClass(PageviewReducer.class);

  DBInputFormat.setInput(job, AccessRecord.class, "Access"
      , null, "url", AccessFieldNames);

  DBOutputFormat.setOutput(job, "Pageview", PageviewFieldNames);
  
  job.setMapOutputKeyClass(Text.class);
  job.setMapOutputValueClass(LongWritable.class);

  job.setOutputKeyClass(PageviewRecord.class);
  job.setOutputValueClass(NullWritable.class);
  int ret;
  try {
    ret = job.waitForCompletion(true) ? 0 : 1;
    boolean correct = verify();
    if(!correct) {
      throw new RuntimeException("Evaluation was not correct!");
    }
  } finally {
    shutdown();    
  }
  return ret;
}