| /* |
| * 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. |
| */ |
| |
| package org.apache.wayang.core.optimizer.costs; |
| |
| import java.util.Objects; |
| import java.util.function.Function; |
| |
| /** |
| * Calculates a {@link TimeEstimate} for a link {@link LoadProfile}. |
| */ |
| public abstract class LoadProfileToTimeConverter { |
| |
| protected final LoadToTimeConverter cpuConverter, diskCoverter, networkConverter; |
| |
| protected LoadProfileToTimeConverter(LoadToTimeConverter cpuConverter, LoadToTimeConverter diskCoverter, LoadToTimeConverter networkConverter) { |
| this.cpuConverter = cpuConverter; |
| this.diskCoverter = diskCoverter; |
| this.networkConverter = networkConverter; |
| } |
| |
| /** |
| * Estimate the time required to execute something with the given {@code loadProfile}. |
| */ |
| public abstract TimeEstimate convert(LoadProfile loadProfile); |
| |
| /** |
| * Create an instance that adds up {@link TimeEstimate}s of given {@link LoadProfile}s including their |
| * sub-{@link LoadProfile}s by adding up {@link TimeEstimate}s of the same type and otherwise using |
| * the given objects to do the conversion. |
| */ |
| public static LoadProfileToTimeConverter createDefault(LoadToTimeConverter cpuConverter, |
| LoadToTimeConverter diskCoverter, |
| LoadToTimeConverter networkConverter, |
| ResourceTimeEstimateAggregator aggregator) { |
| return createTopLevelStretching(cpuConverter, diskCoverter, networkConverter, aggregator, 1d); |
| } |
| |
| /** |
| * Create an instance that adds up {@link TimeEstimate}s of given {@link LoadProfile}s including their |
| * sub-{@link LoadProfile}s by adding up {@link TimeEstimate}s of the same type and otherwise using |
| * the given objects to do the conversion. However, the top-level {@link LoadProfile} estimation is |
| * stretched by a given factor. |
| */ |
| public static LoadProfileToTimeConverter createTopLevelStretching(LoadToTimeConverter cpuConverter, |
| LoadToTimeConverter diskCoverter, |
| LoadToTimeConverter networkConverter, |
| ResourceTimeEstimateAggregator aggregator, |
| double stretch) { |
| return new LoadProfileToTimeConverter(cpuConverter, diskCoverter, networkConverter) { |
| |
| @Override |
| public TimeEstimate convert(LoadProfile loadProfile) { |
| TimeEstimate cpuTime = this.sumWithSubprofiles( |
| loadProfile, LoadProfile::getCpuUsage, this.cpuConverter); |
| TimeEstimate diskTime = this.sumWithSubprofiles( |
| loadProfile, LoadProfile::getDiskUsage, this.diskCoverter); |
| TimeEstimate networkTime = this.sumWithSubprofiles( |
| loadProfile, LoadProfile::getNetworkUsage, this.networkConverter); |
| |
| TimeEstimate aggregate = aggregator.aggregate(cpuTime, diskTime, networkTime); |
| aggregate = aggregate |
| .times(1 / loadProfile.getResourceUtilization()) |
| .plus(new TimeEstimate(loadProfile.getOverheadMillis())); |
| return aggregate; |
| } |
| |
| private TimeEstimate sumWithSubprofiles(LoadProfile profile, |
| Function<LoadProfile, LoadEstimate> property, |
| LoadToTimeConverter converter) { |
| final LoadEstimate topLevelPropertyValue = property.apply(profile); |
| final TimeEstimate topLevelEstimate = topLevelPropertyValue == null ? |
| TimeEstimate.ZERO : |
| converter.convert(topLevelPropertyValue).times(stretch); |
| return profile.getSubprofiles().stream() |
| .map(property) |
| .filter(Objects::nonNull) |
| .map(converter::convert) |
| .reduce(topLevelEstimate, TimeEstimate::plus); |
| } |
| |
| }; |
| |
| |
| } |
| |
| @FunctionalInterface |
| public interface ResourceTimeEstimateAggregator { |
| |
| TimeEstimate aggregate(TimeEstimate cpuEstimate, TimeEstimate diskEstimate, TimeEstimate networkEstimate); |
| |
| } |
| |
| } |