local_wal_parser.h

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#ifndef ENGINES_GRAPH_DB_DATABASE_WAL_LOCAL_WAL_PARSER_H_
#define ENGINES_GRAPH_DB_DATABASE_WAL_LOCAL_WAL_PARSER_H_
 
#include <vector>
#include "flex/engines/graph_db/database/wal/wal.h"
 
namespace gs {
 
class LocalWalParser : public IWalParser {
 public:
  static std::unique_ptr<IWalParser> Make(const std::string& wal_dir) {
    return std::unique_ptr<IWalParser>(new LocalWalParser(wal_dir));
  }
 
  LocalWalParser(const std::string& wal_uri);
  ~LocalWalParser() { close(); }
 
  void open(const std::string& wal_uri) override;
  void close() override;
 
  uint32_t last_ts() const override;
  const WalContentUnit& get_insert_wal(uint32_t ts) const override;
  const std::vector<UpdateWalUnit>& get_update_wals() const override;
 
 private:
  std::vector<int> fds_;
  std::vector<void*> mmapped_ptrs_;
  std::vector<size_t> mmapped_size_;
  std::vector<WalContentUnit> insert_wal_list_;
  uint32_t last_ts_{0};
 
  std::vector<UpdateWalUnit> update_wal_list_;
 
  static const bool registered_;
};
 
}  // namespace gs
 
#endif  // ENGINES_GRAPH_DB_DATABASE_WAL_LOCAL_WAL_PARSER_H_