redis_cache_provider.hpp

//--------------------------------------------------------------------------------------------------
// Copyright (c) 2019 Marcus Geelnard
//
// This software is provided 'as-is', without any express or implied warranty. In no event will the
// authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose, including commercial
// applications, and to alter it and redistribute it freely, subject to the following restrictions:
//
//  1. The origin of this software must not be misrepresented; you must not claim that you wrote
//     the original software. If you use this software in a product, an acknowledgment in the
//     product documentation would be appreciated but is not required.
//
//  2. Altered source versions must be plainly marked as such, and must not be misrepresented as
//     being the original software.
//
//  3. This notice may not be removed or altered from any source distribution.
//--------------------------------------------------------------------------------------------------
 
#ifndef BUILDCACHE_REDIS_CACHE_PROVIDER_HPP_
#define BUILDCACHE_REDIS_CACHE_PROVIDER_HPP_
 
#include <cache/remote_cache_provider.hpp>
 
// Forward declaration.
typedef struct redisContext redisContext;
 
namespace bcache {
 
class redis_cache_provider_t : public remote_cache_provider_t {
public:
  redis_cache_provider_t();
  ~redis_cache_provider_t() override;
 
  // Implementation of the remote_cache_provider_t interface.
  bool connect(const std::string& host_description) override;
  bool is_connected() const override;
  cache_entry_t lookup(const std::string& hash) override;
  void add(const std::string& hash,
           const cache_entry_t& entry,
           const std::map<std::string, expected_file_t>& expected_files) override;
  void get_file(const std::string& hash,
                const std::string& source_id,
                const std::string& target_path,
                const bool is_compressed) override;
 
private:
  void disconnect();
 
  std::string get_data(const std::string& key);
 
  void set_data(const std::string& key, const std::string& data);
 
  redisContext* m_ctx = nullptr;
};
 
}  // namespace bcache
 
#endif  // BUILDCACHE_REDIS_CACHE_PROVIDER_HPP_