org.apache.pulsar.policies.data.loadbalancer.ResourceUsage Maven / Gradle / Ivy
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* 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.pulsar.policies.data.loadbalancer;
import lombok.EqualsAndHashCode;
import lombok.ToString;
/**
* POJO used to represent any system specific resource usage this is the format that load manager expects it in.
*/
@EqualsAndHashCode
@ToString
public class ResourceUsage {
public final double usage;
public final double limit;
public ResourceUsage(double usage, double limit) {
this.usage = usage;
this.limit = limit;
}
public ResourceUsage() {
this(0, 0);
}
/**
* this may be wrong since we are comparing available and not the usage.
*
* @param o
* @return
*/
public int compareTo(ResourceUsage o) {
double required = o.limit - o.usage;
double available = limit - usage;
return Double.compare(available, required);
}
public float percentUsage() {
float proportion = 0;
if (limit > 0) {
proportion = ((float) usage) / ((float) limit);
}
return proportion * 100;
}
}