com.netflix.control.clutch.ClutchExperimental Maven / Gradle / Ivy
/*
* Copyright 2020 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.clutch;
import com.google.common.util.concurrent.AtomicDouble;
import com.netflix.control.IActuator;
import com.netflix.control.clutch.metrics.IClutchMetricsRegistry;
import rx.Observable;
import java.util.concurrent.TimeUnit;
/**
* Clutch experimental is taking a radically different approach to auto scaling, something akin to the first
* iteration of clutch but with lessons from the past year of auto scaling.
*/
public class ClutchExperimental implements Observable.Transformer {
private final IActuator actuator;
private final Integer initialSize;
private final Integer minSize;
private final Integer maxSize;
private final Observable timer;
private final Observable size;
private final long initialConfigMillis;
public ClutchExperimental(IActuator actuator, Integer initialSize, Integer minSize, Integer maxSize, Observable size) {
this(actuator, initialSize, minSize, maxSize, size, Observable.interval(1, TimeUnit.DAYS), 1000 * 60 * 10);
}
/**
* Constructs a new Clutch instance for autoscaling.
* @param actuator A function of Double -> Double which causes the scaling to occur.
* @param initialSize The initial size of the cluster as it exists before scaling.
* @param minSize The minimum size to which the cluster can/should scale.
* @param maxSize The maximum size to which the cluster can/should scale.
* @param size An observable indicating the size of the cluster should external events resize it.
* @param timer An observable on which each tick signifies a new configuration should be emitted.
* @param initialConfigMillis The initial number of milliseconds before initial configuration.
*/
public ClutchExperimental(IActuator actuator, Integer initialSize, Integer minSize, Integer maxSize,
Observable size, Observable timer, long initialConfigMillis) {
this.actuator = actuator;
this.initialSize = initialSize;
this.minSize = minSize;
this.maxSize = maxSize;
this.size = size;
this.timer = timer;
this.initialConfigMillis = initialConfigMillis;
}
@Override
public Observable