private void handleRequest(FileReader fileReader) throws IOException {
    try { // always delete file after invoking handler
      requestHandler.handleRequest();
    } finally {
      try {
        fileReader.close();
        if (!file.delete()) {
          logger.warn("Unable to delete {}", file);
        }
      } catch (SecurityException e) {
        logger.warn("Unable to delete {}", file, e);
      }
    }
  }
Invokes a ControlRequestHandler when a control file has been created.

@since GemFire 8.0
geode-core/src/main/java/org/apache/geode/internal/process/ControlFileWatchdog.java