com.netflix.control.IActuator Maven / Gradle / Ivy
/*
* Copyright 2019 Netflix, Inc.
*
* Licensed 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.
*/
package com.netflix.control;
import rx.functions.Func1;
/**
* Same interface as IController but separated so that actuators can be identified.
*
* The job of the actuator is to receive a size and alter the size of the target
* to be autoscaled. This might for example be a Mantis Job, a Flink Router or even
* an AWS Autoscaling Group.
*/
public abstract class IActuator extends IController {
/**
* Static factory method for constructing an instance of IAcuator.
*
* @param fn A function which presumably side-effects for actuation. Should return its input.
* @return An IActuator which calls fn with the value.
*/
public static IActuator of(Func1 fn) {
return new IActuator() {
@Override
protected Double processStep(Double value) {
return fn.call(value);
}
};
}
}