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46 lines
1.7 KiB
Java
46 lines
1.7 KiB
Java
// Copyright 2016 The Nomulus Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.monitoring.metrics;
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import com.google.common.collect.ImmutableRangeMap;
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/**
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* Models a distribution of double-precision floating point sample data, and provides summary
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* statistics of the distribution. This class also models the probability density function (PDF) of
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* the distribution with a histogram.
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*
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* <p>The summary statistics provided are the mean and sumOfSquaredDeviation of the distribution.
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*
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* <p>The histogram fitting function is provided via a {@link DistributionFitter} implementation.
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*
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* @see DistributionFitter
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*/
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public interface Distribution {
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/** Returns the mean of this distribution. */
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double mean();
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/** Returns the sum of squared deviations from the mean of this distribution. */
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double sumOfSquaredDeviation();
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/** Returns the count of samples in this distribution. */
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long count();
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/** Returns a histogram of the distribution's values. */
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ImmutableRangeMap<Double, Long> intervalCounts();
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/** Returns the {@link DistributionFitter} of this distribution. */
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DistributionFitter distributionFitter();
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}
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