weights.hpp

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//
//     http://www.apache.org/licenses/LICENSE-2.0
//
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#ifndef __MASTER_WEIGHTS_HPP__
#define __MASTER_WEIGHTS_HPP__

#include <string>

#include <mesos/mesos.hpp>

#include <stout/error.hpp>
#include <stout/option.hpp>
#include <stout/try.hpp>

#include "master/registrar.hpp"
#include "master/registry.hpp"

namespace mesos {
namespace internal {
namespace master {
namespace weights {

// We do not impose any constraints upon weights registry operations.
// It is up to the master to determine whether a weights update
// request is valid. Hence weights registry operations never fail (i.e.
// `perform()` never returns an `Error`). Note that this does not
// influence registry failures, e.g. a network partition may occur and
// will render the operation hanging (i.e. `Future` for the operation
// will not be set).

class UpdateWeights : public RegistryOperation
{
public:
  explicit UpdateWeights(const std::vector<WeightInfo>& _weightInfos);

protected:
  Try<bool> perform(Registry* registry, hashset<SlaveID>* slaveIDs);

private:
  const std::vector<WeightInfo> weightInfos;
};

} // namespace weights {
} // namespace master {
} // namespace internal {
} // namespace mesos {

#endif // __MASTER_WEIGHTS_HPP__