// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 KUDU_TSERVER_TABLET_REPLICA_LOOKUP_H_
#define KUDU_TSERVER_TABLET_REPLICA_LOOKUP_H_

#include <boost/optional/optional_fwd.hpp>
#include <functional>
#include <memory>
#include <string>
#include <vector>

#include "kudu/gutil/ref_counted.h"
#include "kudu/tserver/tserver.pb.h"
#include "kudu/util/status.h"

namespace kudu {

class HostPort;
class NodeInstancePB;

namespace consensus {
class StartTabletCopyRequestPB;
} // namespace consensus

namespace tablet {
class TabletReplica;
} // namespace tablet

namespace tserver {

// Pure virtual interface that provides an abstraction for something that
// contains and manages TabletReplicas. This interface is implemented on both
// tablet servers and master servers.
// TODO: Rename this interface.
class TabletReplicaLookupIf {
 public:
  virtual Status GetTabletReplica(const std::string& tablet_id,
                                  scoped_refptr<tablet::TabletReplica>* tablet_replica) const = 0;

  // Appends all non-tombstoned tablet replicas to the 'replicas' vector.
  virtual void GetTabletReplicas(
      std::vector<scoped_refptr<tablet::TabletReplica>>* replicas) const = 0;

  virtual const NodeInstancePB& NodeInstance() const = 0;

  virtual void StartTabletCopy(
      const consensus::StartTabletCopyRequestPB* req,
      std::function<void(const Status&, TabletServerErrorPB::Code)> cb) = 0;
};

} // namespace tserver
} // namespace kudu

#endif // KUDU_TSERVER_TABLET_REPLICA_LOOKUP_H_