Apache Mesos
leveldb.hpp
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16 
17 #ifndef __LOG_LEVELDB_HPP__
18 #define __LOG_LEVELDB_HPP__
19 
20 #include <leveldb/db.h>
21 
22 #include <stdint.h>
23 
24 #include <stout/option.hpp>
25 
26 #include "log/storage.hpp"
27 
28 namespace mesos {
29 namespace internal {
30 namespace log {
31 
32 // Concrete implementation of the storage interface using leveldb.
33 class LevelDBStorage : public Storage
34 {
35 public:
37  virtual ~LevelDBStorage();
38 
39  virtual Try<State> restore(const std::string& path);
40  virtual Try<Nothing> persist(const Metadata& metadata);
41  virtual Try<Nothing> persist(const Action& action);
42  virtual Try<Action> read(uint64_t position);
43 
44 private:
45  leveldb::DB* db;
46 
47  // First position still in leveldb, used during truncation.
48  Option<uint64_t> first;
49 };
50 
51 } // namespace log {
52 } // namespace internal {
53 } // namespace mesos {
54 
55 #endif // __LOG_LEVELDB_HPP__
Definition: leveldb.hpp:33
virtual Try< Nothing > persist(const Metadata &metadata)
Definition: try.hpp:34
virtual Try< Action > read(uint64_t position)
Definition: storage.hpp:35
virtual Try< State > restore(const std::string &path)