| 1 | /*!
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| 2 | * Copyright 2017 Google Inc. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | */
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| 16 | export interface HistogramOptions {
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| 17 | min?: number;
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| 18 | max?: number;
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| 19 | }
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| 20 | /*!
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| 21 | * The Histogram class is used to capture the lifespan of messages within the
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| 22 | * the client. These durations are then used to calculate the 99th percentile
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| 23 | * of ack deadlines for future messages.
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| 24 | *
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| 25 | * @private
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| 26 | * @class
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| 27 | */
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| 28 | export declare class Histogram {
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| 29 | options: HistogramOptions;
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| 30 | data: Map<number, number>;
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| 31 | length: number;
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| 32 | constructor(options?: HistogramOptions);
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| 33 | /*!
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| 34 | * Adds a value to the histogram.
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| 35 | *
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| 36 | * @private
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| 37 | * @param {numnber} value - The value in milliseconds.
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| 38 | */
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| 39 | add(value: number): void;
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| 40 | /*!
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| 41 | * Retrieves the nth percentile of recorded values.
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| 42 | *
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| 43 | * @private
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| 44 | * @param {number} percent The requested percentage.
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| 45 | * @return {number}
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| 46 | */
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| 47 | percentile(percent: number): number;
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| 48 | }
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