import org.apache.hadoop.hbase.mapreduce.MapreduceTestingShim; //导入依赖的package包/类
void testInputFormat(Class<? extends InputFormat> clazz) throws IOException {
  final JobConf job = MapreduceTestingShim.getJobConf(mrCluster);
  job.setInputFormat(clazz);
  job.setOutputFormat(NullOutputFormat.class);
  job.setMapperClass(ExampleVerifier.class);
  job.setNumReduceTasks(0);
  LOG.debug("submitting job.");
  final RunningJob run = JobClient.runJob(job);
  assertTrue("job failed!", run.isSuccessful());
  assertEquals("Saw the wrong number of instances of the filtered-for row.", 2, run.getCounters()
      .findCounter(TestTableInputFormat.class.getName() + ":row", "aaa").getCounter());
  assertEquals("Saw any instances of the filtered out row.", 0, run.getCounters()
      .findCounter(TestTableInputFormat.class.getName() + ":row", "bbb").getCounter());
  assertEquals("Saw the wrong number of instances of columnA.", 1, run.getCounters()
      .findCounter(TestTableInputFormat.class.getName() + ":family", "columnA").getCounter());
  assertEquals("Saw the wrong number of instances of columnB.", 1, run.getCounters()
      .findCounter(TestTableInputFormat.class.getName() + ":family", "columnB").getCounter());
  assertEquals("Saw the wrong count of values for the filtered-for row.", 2, run.getCounters()
      .findCounter(TestTableInputFormat.class.getName() + ":value", "value aaa").getCounter());
  assertEquals("Saw the wrong count of values for the filtered-out row.", 0, run.getCounters()
      .findCounter(TestTableInputFormat.class.getName() + ":value", "value bbb").getCounter());
}
 

import org.apache.hadoop.hbase.mapreduce.MapreduceTestingShim; //导入依赖的package包/类
/** This is used before starting HDFS and map-reduce mini-clusters */
private void createDirsAndSetProperties() throws IOException {
  setupClusterTestDir();
  System.setProperty(TEST_DIRECTORY_KEY, clusterTestDir.getPath());
  createDirAndSetProperty("cache_data", "test.cache.data");
  createDirAndSetProperty("hadoop_tmp", "hadoop.tmp.dir");
  hadoopLogDir = createDirAndSetProperty("hadoop_logs", "hadoop.log.dir");
  createDirAndSetProperty("mapred_local", "mapreduce.cluster.local.dir");
  createDirAndSetProperty("mapred_temp", "mapreduce.cluster.temp.dir");
  enableShortCircuit();

  Path root = getDataTestDirOnTestFS("hadoop");
  conf.set(MapreduceTestingShim.getMROutputDirProp(),
    new Path(root, "mapred-output-dir").toString());
  conf.set("mapreduce.jobtracker.system.dir", new Path(root, "mapred-system-dir").toString());
  conf.set("mapreduce.jobtracker.staging.root.dir",
    new Path(root, "mapreduce-jobtracker-staging-root-dir").toString());
  conf.set("mapreduce.job.working.dir", new Path(root, "mapred-working-dir").toString());
}
 

import org.apache.hadoop.hbase.mapreduce.MapreduceTestingShim; //导入依赖的package包/类
/** This is used before starting HDFS and map-reduce mini-clusters */
private void createDirsAndSetProperties() throws IOException {
  setupClusterTestDir();
  System.setProperty(TEST_DIRECTORY_KEY, clusterTestDir.getPath());
  createDirAndSetProperty("cache_data", "test.cache.data");
  createDirAndSetProperty("hadoop_tmp", "hadoop.tmp.dir");
  hadoopLogDir = createDirAndSetProperty("hadoop_logs", "hadoop.log.dir");
  createDirAndSetProperty("mapred_local", "mapred.local.dir");
  createDirAndSetProperty("mapred_temp", "mapred.temp.dir");
  enableShortCircuit();

  Path root = getDataTestDirOnTestFS("hadoop");
  conf.set(MapreduceTestingShim.getMROutputDirProp(),
    new Path(root, "mapred-output-dir").toString());
  conf.set("mapred.system.dir", new Path(root, "mapred-system-dir").toString());
  conf.set("mapreduce.jobtracker.staging.root.dir",
    new Path(root, "mapreduce-jobtracker-staging-root-dir").toString());
  conf.set("mapred.working.dir", new Path(root, "mapred-working-dir").toString());
}
 

import org.apache.hadoop.hbase.mapreduce.MapreduceTestingShim; //导入依赖的package包/类
/** This is used before starting HDFS and map-reduce mini-clusters */
private void createDirsAndSetProperties() throws IOException {
  setupClusterTestDir();
  conf.set(TEST_DIRECTORY_KEY, clusterTestDir.getPath());
  System.setProperty(TEST_DIRECTORY_KEY, clusterTestDir.getPath());
  createDirAndSetProperty("cache_data", "test.cache.data");
  createDirAndSetProperty("hadoop_tmp", "hadoop.tmp.dir");
  hadoopLogDir = createDirAndSetProperty("hadoop_logs", "hadoop.log.dir");
  createDirAndSetProperty("mapred_local", "mapreduce.cluster.local.dir");
  createDirAndSetProperty("mapred_temp", "mapreduce.cluster.temp.dir");
  enableShortCircuit();

  Path root = getDataTestDirOnTestFS("hadoop");
  conf.set(MapreduceTestingShim.getMROutputDirProp(),
    new Path(root, "mapred-output-dir").toString());
  conf.set("mapreduce.jobtracker.system.dir", new Path(root, "mapred-system-dir").toString());
  conf.set("mapreduce.jobtracker.staging.root.dir",
    new Path(root, "mapreduce-jobtracker-staging-root-dir").toString());
  conf.set("mapreduce.job.working.dir", new Path(root, "mapred-working-dir").toString());
  conf.set("yarn.app.mapreduce.am.staging-dir",
    new Path(root, "mapreduce-am-staging-root-dir").toString());
}
 

import org.apache.hadoop.hbase.mapreduce.MapreduceTestingShim; //导入依赖的package包/类
/**
 * Starts a <code>MiniMRCluster</code>.
 *
 * @param servers  The number of <code>TaskTracker</code>'s to start.
 * @throws IOException When starting the cluster fails.
 */
public void startMiniMapReduceCluster(final int servers) throws IOException {
  LOG.info("Starting mini mapreduce cluster...");
  if (dataTestDir == null) {
    setupDataTestDir();
  }
  // These are needed for the new and improved Map/Reduce framework
  Configuration c = getConfiguration();
  String logDir = c.get("hadoop.log.dir");
  String tmpDir = c.get("hadoop.tmp.dir");
  if (logDir == null) {
    logDir = tmpDir;
  }
  System.setProperty("hadoop.log.dir", logDir);
  c.set("mapred.output.dir", tmpDir);

  // Tests were failing because this process used 6GB of virtual memory and was getting killed.
  // we up the VM usable so that processes don't get killed.
  conf.setFloat("yarn.nodemanager.vmem-pmem-ratio", 8.0f);

  mrCluster = new MiniMRCluster(0, 0, servers,
    FileSystem.get(conf).getUri().toString(), 1, null, null, null, new JobConf(conf));

  JobConf jobConf = MapreduceTestingShim.getJobConf(mrCluster);
  if (jobConf == null) {
    jobConf = mrCluster.createJobConf();
  }
  jobConf.set("mapred.local.dir",
    conf.get("mapred.local.dir")); //Hadoop MiniMR overwrites this while it should not

  LOG.info("Mini mapreduce cluster started");
  JobConf mrClusterJobConf = mrCluster.createJobConf();
  c.set("mapred.job.tracker", mrClusterJobConf.get("mapred.job.tracker"));
  /* this for mrv2 support */
  conf.set("mapreduce.framework.name", "yarn");
  String rmAdress = mrClusterJobConf.get("yarn.resourcemanager.address");
  if (rmAdress != null) {
    conf.set("yarn.resourcemanager.address", rmAdress);
  }
  String schedulerAdress =
    mrClusterJobConf.get("yarn.resourcemanager.scheduler.address");
  if (schedulerAdress != null) {
    conf.set("yarn.resourcemanager.scheduler.address", schedulerAdress);
  }
}