YugabyteDB (2.13.0.0-b42, bfc6a6643e7399ac8a0e81d06a3ee6d6571b33ab)

// Copyright (c) YugaByte, 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 YB_TABLET_APPLY_INTENTS_TASK_H

#define YB_TABLET_APPLY_INTENTS_TASK_H

#include "yb/rpc/strand.h"

#include "yb/tablet/running_transaction_context.h"

#include "yb/util/operation_counter.h"

namespace yb {

namespace tablet {

// Used by RunningTransaction to apply its intents.

class ApplyIntentsTask : public rpc::StrandTask {

 public:

  ApplyIntentsTask(TransactionIntentApplier* applier,

                   RunningTransactionContext* running_transaction_context,

                   const TransactionApplyData* apply_data);

  // Returns true if task was successfully prepared and could be submitted to the thread pool.

  bool Prepare(RunningTransactionPtr transaction, ScopedRWOperation* operation);

  void Run() override;

  void Done(const Status& status) override;

  virtual ~ApplyIntentsTask() = default;

 private:

  std::string LogPrefix() const;

  TransactionIntentApplier& applier_;

  RunningTransactionContext& running_transaction_context_;

  const TransactionApplyData& apply_data_;

  ScopedRWOperation operation_;

  // Whether this task was already in use or not.

  // Helps to avoid multiple submissions of the same task.

  // The task can be submitted only once, so this flag never reverts its state to false.

  std::atomic<bool> used_{false};

  RunningTransactionPtr transaction_;

};

} // namespace tablet

} // namespace yb

#endif // YB_TABLET_APPLY_INTENTS_TASK_H