com.netflix.fenzo.AsSoftConstraint Maven / Gradle / Ivy

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/*
 * Copyright 2015 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.fenzo;

import com.netflix.fenzo.ConstraintEvaluator;
import com.netflix.fenzo.TaskRequest;
import com.netflix.fenzo.TaskTrackerState;
import com.netflix.fenzo.VMTaskFitnessCalculator;
import com.netflix.fenzo.VirtualMachineCurrentState;

public class AsSoftConstraint {
    public static VMTaskFitnessCalculator get(final ConstraintEvaluator c) {
        // This fitness calculator return 0 or 1. This can possibly be improved upon by the ConstraintEvaluator using its
        // own logic.
        return new VMTaskFitnessCalculator() {
            @Override
            public String getName() {
                return c.getName();
            }
            @Override
            public double calculateFitness(TaskRequest taskRequest, VirtualMachineCurrentState targetVM, TaskTrackerState taskTrackerState) {
                return c.evaluate(taskRequest, targetVM, taskTrackerState).isSuccessful()? 1.0 : 0.0;
            }
        };
    }
}