code: def get(self):
      
      try:
        cluster = self.get_argument_cluster()
        role = self.get_argument_role()
        environ = self.get_argument_environ()
        topology_name = self.get_argument_topology()
        topology_info = self.tracker.getTopologyInfo(topology_name, cluster, role, environ)
        runtime_state = topology_info["runtime_state"]
        runtime_state["topology_version"] = topology_info["metadata"]["release_version"]
        topology = self.tracker.getTopologyByClusterRoleEnvironAndName(
            cluster, role, environ, topology_name)
        reg_summary = yield tornado.gen.Task(self.getStmgrsRegSummary, topology.tmaster)
        for stmgr, reg in reg_summary.items():
          runtime_state["stmgrs"].setdefault(stmgr, {})["is_registered"] = reg
        self.write_success_response(runtime_state)
      except Exception as e:
        Log.debug(traceback.format_exc())
        self.write_error_response(e)
docs: get method