int setRegionState()

in hbase-hbck2/src/main/java/org/apache/hbase/HBCK2.java [268:308]
39 lines of code
5 McCabe index (conditional complexity)

  int setRegionState(ClusterConnection connection, String region, int replicaId,
                     RegionState.State newState)
          throws IOException {
    if (newState == null) {
      throw new IllegalArgumentException("State can't be null.");
    }
    RegionState.State currentState = null;
    Table table = connection.getTable(TableName.valueOf("hbase:meta"));
    RowFilter filter = new RowFilter(CompareOperator.EQUAL, new SubstringComparator(region));
    Scan scan = new Scan();
    scan.setFilter(filter);
    Result result = table.getScanner(scan).next();
    if (result != null) {
      byte[] currentStateValue = result.getValue(HConstants.CATALOG_FAMILY,
              getRegionStateColumn(replicaId));
      if (currentStateValue == null) {
        System.out.println("WARN: Region state info on meta was NULL");
      } else {
        currentState = RegionState.State.valueOf(
                org.apache.hadoop.hbase.util.Bytes.toString(currentStateValue));
      }
      Put put = new Put(result.getRow());
      put.addColumn(HConstants.CATALOG_FAMILY, getRegionStateColumn(replicaId),
              org.apache.hadoop.hbase.util.Bytes.toBytes(newState.name()));
      table.put(put);

      if (replicaId == 0) {
        System.out.println("Changed region " + region + " STATE from "
                + currentState + " to " + newState);
      } else {
        System.out.println("Changed STATE for replica reigon " + replicaId +
                " of primary region " + region +
                "from " + currentState + " to " + newState);
      }

      return EXIT_SUCCESS;
    } else {
      System.out.println("ERROR: Could not find region " + region + " in meta.");
    }
    return EXIT_FAILURE;
  }