kafka Frequency 源码
kafka Frequency 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/metrics/stats/Frequency.java
/*
* 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.kafka.common.metrics.stats;
import org.apache.kafka.common.MetricName;
/**
* Definition of a frequency metric used in a {@link Frequencies} compound statistic.
*/
public class Frequency {
private final MetricName name;
private final double centerValue;
/**
* Create an instance with the given name and center point value.
*
* @param name the name of the frequency metric; may not be null
* @param centerValue the value identifying the {@link Frequencies} bucket to be reported
*/
public Frequency(MetricName name, double centerValue) {
this.name = name;
this.centerValue = centerValue;
}
/**
* Get the name of this metric.
*
* @return the metric name; never null
*/
public MetricName name() {
return this.name;
}
/**
* Get the value of this metrics center point.
*
* @return the center point value
*/
public double centerValue() {
return this.centerValue;
}
@Override
public String toString() {
return "Frequency(" +
"name=" + name +
", centerValue=" + centerValue +
')';
}
}
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