heron/tmaster/src/cpp/manager/stmgrstate.h

/*
 * Copyright 2015 Twitter, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __STMANAGERSTATE_H
#define __STMANAGERSTATE_H

#include <string>
#include <vector>
#include "network/network.h"
#include "proto/tmaster.pb.h"
#include "basics/basics.h"

namespace heron {
namespace proto {
namespace system {
class StMgr;
class StMgrStats;
class PhysicalPlan;
}
}
}

namespace heron {
namespace tmaster {

class TMasterServer;

class StMgrState {
 public:
  StMgrState(Connection* _conn, const proto::system::StMgr& _info,
             const std::vector<proto::system::Instance*>& _instances, TMasterServer* _server);
  virtual ~StMgrState();

  void UpdateWithNewStMgr(const proto::system::StMgr& _info,
                          const std::vector<proto::system::Instance*>& _instances,
                          Connection* _conn);

  // Update the heartbeat. Note:- We own _stats now
  void heartbeat(sp_int64 _time, proto::system::StMgrStats* _stats);

  // Send messages to the stmgr
  void NewPhysicalPlan(const proto::system::PhysicalPlan& _pplan);

  bool TimedOut() const;

  // getters
  Connection* get_connection() { return connection_; }
  const std::string& get_id() const { return stmgr_->id(); }
  sp_uint32 get_num_instances() const { return instances_.size(); }
  const std::vector<proto::system::Instance*>& get_instances() const { return instances_; }
  const proto::system::StMgr* get_stmgr() const { return stmgr_; }
  bool VerifyInstances(const std::vector<proto::system::Instance*>& _instances);

 private:
  // The last time we got a hearbeat from this stmgr
  sp_int64 last_heartbeat_;
  // The stats that was reported last time
  proto::system::StMgrStats* last_stats_;

  // All the instances on this stmgr
  std::vector<proto::system::Instance*> instances_;

  // The info about this stmgr
  proto::system::StMgr* stmgr_;
  // The connection used by the nodemanager to contact us
  Connection* connection_;
  // Our link to our TMaster
  TMasterServer* server_;
};
}  // namespace tmaster
}  // namespace heron

#endif