fetcher.hpp

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#ifndef __PROVISIONER_APPC_FETCHER_HPP__
#define __PROVISIONER_APPC_FETCHER_HPP__

#include <string>

#include <process/process.hpp>
#include <process/shared.hpp>

#include <stout/path.hpp>

#include "slave/flags.hpp"

#include "uri/fetcher.hpp"

namespace mesos {
namespace internal {
namespace slave {
namespace appc {

class Fetcher
{
public:
  static Try<process::Owned<Fetcher>> create(
      const Flags& flags,
      const process::Shared<uri::Fetcher>& fetcher);

  /*
   * Fetches Appc image to the given directory.
   *
   * Reference: https://github.com/appc/spec/blob/master/spec/discovery.md
   *
   * @param image Encapsulated information about the appc image.
   * @param directory Path of directory where the image has to be saved.
   * @returns Nothing on success.
   *          Failure in case of any error.
   */
  process::Future<Nothing> fetch(
      const Image::Appc& appc,
      const Path& directory);

private:
  Fetcher(
      const std::string& uriPrefix,
      const process::Shared<uri::Fetcher>& fetcher);

  Fetcher(const Fetcher&) = delete;
  Fetcher& operator=(const Fetcher&) = delete;

  const std::string uriPrefix;
  process::Shared<uri::Fetcher> fetcher;
};

} // namespace appc {
} // namespace slave {
} // namespace internal {
} // namespace mesos {

#endif // __PROVISIONER_APPC_FETCHER_HPP__