src/slave/qos_controller.hpp

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __SLAVE_QOS_CONTROLLER_HPP__
#define __SLAVE_QOS_CONTROLLER_HPP__

#include <mesos/slave/qos_controller.hpp>

#include <stout/lambda.hpp>

#include <process/owned.hpp>

namespace mesos {
namespace internal {
namespace slave {

// Forward declaration.
class NoopQoSControllerProcess;


// The NOOP QoS Controller is an empty stub, which returns a future
// which is never satisfied. Thus, the slave will never carry out any
// corrections.
class NoopQoSController : public mesos::slave::QoSController
{
public:
  virtual ~NoopQoSController();

  virtual Try<Nothing> initialize(
      const lambda::function<process::Future<ResourceUsage>()>& usage);

  virtual process::Future<std::list<mesos::slave::QoSCorrection>> corrections();

protected:
  process::Owned<NoopQoSControllerProcess> process;
};


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

#endif // __SLAVE_QOS_CONTROLLER_HPP__