Github user zentol commented on a diff in the pull request: https://github.com/apache/flink/pull/2112#discussion_r67515094 --- Diff: flink-core/src/main/java/org/apache/flink/metrics/HistogramStatistics.java --- @@ -0,0 +1,135 @@ +/* + * 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.flink.metrics; + +import org.apache.flink.annotation.PublicEvolving; + +/** + * Histogram statistics represent the current snapshot of elements recorded in the histogram. + * + * The histogram statistics allow to calculate values for quantiles, the mean, the standard + * deviation, the minimum and the maximum. + */ +@PublicEvolving +public abstract class HistogramStatistics { + + /** + * Returns the value for the given quantile based on the represented histogram statistics. + * + * @param quantile Quantile to calculate the value for + * @return Value for the given quantile + */ + public abstract double getValue(double quantile); --- End diff -- should we rename this to getQuantile?
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