Java Code Examples for org.apache.hadoop.hbase.regionserver.HRegion#getRegionInfo()

/**
 * Create new set of regions on the specified file-system.
 * @param conf {@link Configuration}
 * @param rootDir Root directory for HBase instance
 * @param tableDescriptor description of the table
 * @param newRegion {@link RegionInfo} that describes the region to create
 * @param task {@link RegionFillTask} custom code to populate region after creation
 * @throws IOException
 */
public static RegionInfo createRegion(final Configuration conf, final Path rootDir,
    final TableDescriptor tableDescriptor, final RegionInfo newRegion,
    final RegionFillTask task) throws IOException {
  // 1. Create HRegion
  // The WAL subsystem will use the default rootDir rather than the passed in rootDir
  // unless I pass along via the conf.
  Configuration confForWAL = new Configuration(conf);
  confForWAL.set(HConstants.HBASE_DIR, rootDir.toString());
  HRegion region = HRegion.createHRegion(newRegion, rootDir, conf, tableDescriptor, null, false);
  try {
    // 2. Custom user code to interact with the created region
    if (task != null) {
      task.fillRegion(region);
    }
  } finally {
    // 3. Close the new region to flush to disk. Close log file too.
    region.close();
  }
  return region.getRegionInfo();
}
 

protected void runwarmup()  throws InterruptedException{
  Thread thread = new Thread(new Runnable() {
    @Override
    public void run() {
      HRegionServer rs = TEST_UTIL.getMiniHBaseCluster().getRegionServer(0);
      HRegion region = TEST_UTIL.getMiniHBaseCluster().getRegions(TABLENAME).get(0);
      RegionInfo info = region.getRegionInfo();

      try {
        TableDescriptor htd = table.getDescriptor();
        for (int i = 0; i < 10; i++) {
          warmupHRegion(info, htd, rs.getWAL(info), rs.getConfiguration(), rs, null);
        }
      } catch (IOException ie) {
        LOG.error("Failed warming up region " + info.getRegionNameAsString(), ie);
      }
    }
  });
  thread.start();
  thread.join();
}
 

/**
* Basic client side validation of HBASE-4536
*/
@Test
public void testWarmup() throws Exception {
  int serverid = 0;
  HRegion region = TEST_UTIL.getMiniHBaseCluster().getRegions(TABLENAME).get(0);
  RegionInfo info = region.getRegionInfo();
  runwarmup();
  for (int i = 0; i < 10; i++) {
    HRegionServer rs = TEST_UTIL.getMiniHBaseCluster().getRegionServer(serverid);
    byte [] destName = Bytes.toBytes(rs.getServerName().toString());
    assertTrue(destName != null);
    LOG.info("i=" + i );
    TEST_UTIL.getMiniHBaseCluster().getMaster().move(info.getEncodedNameAsBytes(), destName);
    serverid = (serverid + 1) % 2;
  }
}
 

@Test
public void testRecoveryAndDoubleExecutionUnassignAndAssign() throws Exception {
  HMaster master = UTIL.getMiniHBaseCluster().getMaster();
  MasterProcedureEnv env = master.getMasterProcedureExecutor().getEnvironment();
  HRegion region = UTIL.getMiniHBaseCluster().getRegions(tableName).get(0);
  RegionInfo regionInfo = region.getRegionInfo();
  long openSeqNum = region.getOpenSeqNum();
  TransitRegionStateProcedure unassign = TransitRegionStateProcedure.unassign(env, regionInfo);
  testRecoveryAndDoubleExcution(unassign);
  AssignmentManager am = master.getAssignmentManager();
  assertTrue(am.getRegionStates().getRegionState(regionInfo).isClosed());

  TransitRegionStateProcedure assign = TransitRegionStateProcedure.assign(env, regionInfo, null);
  testRecoveryAndDoubleExcution(assign);

  HRegion region2 = UTIL.getMiniHBaseCluster().getRegions(tableName).get(0);
  long openSeqNum2 = region2.getOpenSeqNum();
  // confirm that the region is successfully opened
  assertTrue(openSeqNum2 > openSeqNum);
}
 

@Test
public void testInterClusterReplication() throws Exception {
  final String id = "testInterClusterReplication";

  List<HRegion> regions = UTIL1.getHBaseCluster().getRegions(tableName);
  int totEdits = 0;

  // Make sure edits are spread across regions because we do region based batching
  // before shipping edits.
  for(HRegion region: regions) {
    RegionInfo hri = region.getRegionInfo();
    byte[] row = hri.getStartKey();
    for (int i = 0; i < 100; i++) {
      if (row.length > 0) {
        Put put = new Put(row);
        put.addColumn(famName, row, row);
        region.put(put);
        totEdits++;
      }
    }
  }

  hbaseAdmin.addReplicationPeer(id,
      new ReplicationPeerConfig().setClusterKey(ZKConfig.getZooKeeperClusterKey(CONF2))
          .setReplicationEndpointImpl(InterClusterReplicationEndpointForTest.class.getName()));

  final int numEdits = totEdits;
  Waiter.waitFor(CONF1, 30000, new Waiter.ExplainingPredicate<Exception>() {
    @Override
    public boolean evaluate() throws Exception {
      return InterClusterReplicationEndpointForTest.replicateCount.get() == numEdits;
    }

    @Override
    public String explainFailure() throws Exception {
      String failure = "Failed to replicate all edits, expected = " + numEdits
          + " replicated = " + InterClusterReplicationEndpointForTest.replicateCount.get();
      return failure;
    }
  });

  hbaseAdmin.removeReplicationPeer("testInterClusterReplication");
  UTIL1.deleteTableData(tableName);
}