/**
 * Copyright (c) 2021 OceanBase
 * OceanBase CE is licensed under Mulan PubL v2.
 * You can use this software according to the terms and conditions of the Mulan PubL v2.
 * You may obtain a copy of Mulan PubL v2 at:
 *          http://license.coscl.org.cn/MulanPubL-2.0
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PubL v2 for more details.
 */

#ifndef OCEANBASE_SQL_EXECUTOR_OB_REMOTE_JOB_EXECUTOR_
#define OCEANBASE_SQL_EXECUTOR_OB_REMOTE_JOB_EXECUTOR_
namespace oceanbase {
namespace sql {
class ObTaskInfo;
class ObJob;
class ObTaskExecutor;
class ObExecContext;
class ObRemoteJobExecutor {
public:
  ObRemoteJobExecutor();
  virtual ~ObRemoteJobExecutor();
  // set job waiting for schedule
  void set_job(ObJob& job)
  {
    job_ = &job;
  }
  void set_task_executor(ObTaskExecutor& executor)
  {
    executor_ = &executor;
  }
  // schedule a job, distribute and execute tasks in the job.
  int execute(ObExecContext& ctx);
  inline void reset()
  {
    job_ = NULL;
    executor_ = NULL;
  }

private:
  // disallow copy
  ObRemoteJobExecutor(const ObRemoteJobExecutor& other);
  ObRemoteJobExecutor& operator=(const ObRemoteJobExecutor& ohter);

  int get_executable_task(ObExecContext& ctx, ObTaskInfo*& task);

private:
  ObJob* job_;
  ObTaskExecutor* executor_;
};
}  // namespace sql
}  // namespace oceanbase
#endif /* OCEANBASE_SQL_EXECUTOR_OB_REMOTE_JOB_EXECUTOR_ */
//// end of header file