text: /**
   *    Copyright (C) 2014 MongoDB Inc.
   *
   *    This program is free software: you can redistribute it and/or  modify
   *    it under the terms of the GNU Affero General Public License, version 3,
   *    as published by the Free Software Foundation.
   *
   *    This program is distributed in the hope that it will be useful,
   *    but WITHOUT ANY WARRANTY; without even the implied warranty of
   *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *    GNU Affero General Public License for more details.
   *
   *    You should have received a copy of the GNU Affero General Public License
   *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
   *
   *    As a special exception, the copyright holders give permission to link the
   *    code of portions of this program with the OpenSSL library under certain
   *    conditions as described in each individual source file and distribute
   *    linked combinations including the program with the OpenSSL library. You
   *    must comply with the GNU Affero General Public License in all respects for
   *    all of the code used other than as permitted herein. If you modify file(s)
   *    with this exception, you may extend this exception to your version of the
   *    file(s), but you are not obligated to do so. If you do not wish to do so,
   *    delete this exception statement from your version. If you delete this
   *    exception statement from all source files in the program, then also delete
   *    it in the license file.
   */
  
  #pragma once
  
  #include "mongo/base/status.h"
  #include "mongo/db/repl/repl_coordinator.h"
  
  namespace mongo {
  namespace repl {
  
      /**
       * An implementation of ReplicationCoordinator that simply delegates to existing code.
       */
      class LegacyReplicationCoordinator : public ReplicationCoordinator {
          MONGO_DISALLOW_COPYING(LegacyReplicationCoordinator);
  
      public:
  
          LegacyReplicationCoordinator();
          virtual ~LegacyReplicationCoordinator();
  
          virtual void startReplication(TopologyCoordinator*,
                                        ReplicationExecutor::NetworkInterface*);
  
          virtual void shutdown();
  
          virtual bool isShutdownOkay() const;
  
          virtual Mode getReplicationMode() const;
  
          virtual MemberState getCurrentMemberState() const;
  
          virtual ReplicationCoordinator::StatusAndDuration awaitReplication(
                  const OperationContext* txn,
                  const OpTime& ts,
                  const WriteConcernOptions& writeConcern);
  
          virtual ReplicationCoordinator::StatusAndDuration awaitReplicationOfLastOp(
                  const OperationContext* txn,
                  const WriteConcernOptions& writeConcern);
  
          virtual Status stepDown(bool force,
                                  const Milliseconds& waitTime,
                                  const Milliseconds& stepdownTime);
  
          virtual Status stepDownAndWaitForSecondary(const Milliseconds& initialWaitTime,
                                                     const Milliseconds& stepdownTime,
                                                     const Milliseconds& postStepdownWaitTime);
  
          virtual bool isMasterForReportingPurposes();
  
          virtual bool canAcceptWritesForDatabase(const StringData& dbName);
  
          virtual bool canServeReadsFor(const NamespaceString& collection);
  
          virtual bool shouldIgnoreUniqueIndex(const IndexDescriptor* idx);
  
          virtual Status setLastOptime(const OID& rid, const OpTime& ts, const BSONObj& config);
  
          virtual void processReplSetGetStatus(BSONObjBuilder* result);
  
          virtual bool setMaintenanceMode(bool activate);
  
          virtual Status processReplSetMaintenance(bool activate, BSONObjBuilder* resultObj);
  
          virtual Status processReplSetSyncFrom(const std::string& target,
                                                BSONObjBuilder* resultObj);
  
          virtual Status processReplSetFreeze(int secs, BSONObjBuilder* resultObj);
  
          virtual Status processHeartbeat(const BSONObj& cmdObj, BSONObjBuilder* resultObj);
  
          virtual Status processReplSetReconfig(OperationContext* txn,
                                                const BSONObj& newConfigObj,
                                                bool force,
                                                BSONObjBuilder* resultObj);
  
          virtual Status processReplSetInitiate(OperationContext* txn,
                                                const BSONObj& configObj,
                                                BSONObjBuilder* resultObj);
  
          virtual Status processReplSetGetRBID(BSONObjBuilder* resultObj);
  
          virtual void incrementRollbackID();
  
          virtual Status processReplSetFresh(const StringData& setName,
                                             const StringData& who,
                                             unsigned id,
                                             int cfgver,
                                             const OpTime& opTime,
                                             BSONObjBuilder* resultObj);
  
          virtual Status processReplSetElect(const StringData& set,
                                             unsigned whoid,
                                             int cfgver,
                                             const OID& round,
                                             BSONObjBuilder* resultObj);
  
          virtual Status processReplSetUpdatePosition(const BSONArray& updates,
                                                      BSONObjBuilder* resultObj);
  
          virtual Status processReplSetUpdatePositionHandshake(const BSONObj& handshake,
                                                               BSONObjBuilder* resultObj);
  
      private:
          Status _stepDownHelper(bool force,
                                 const Milliseconds& initialWaitTime,
                                 const Milliseconds& stepdownTime,
                                 const Milliseconds& postStepdownWaitTime);
  
          // Rollback id. used to check if a rollback happened during some interval of time
          // TODO: ideally this should only change on rollbacks NOT on mongod restarts also.
          int _rbid;
      };
  
  } // namespace repl
  } // namespace mongo
  