com.microsoft.azure.cosmosdb.internal.RequestChargeTracker Maven / Gradle / Ivy

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/*
 * The MIT License (MIT)
 * Copyright (c) 2018 Microsoft Corporation
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.microsoft.azure.cosmosdb.internal;

import java.util.concurrent.atomic.AtomicLong;

/**
 * Tracks requests charge in the Azure Cosmos DB database service.
 */
public final class RequestChargeTracker {
    private final static int NUMBER_OF_DECIMAL_POINT_TO_RESERVE_FACTOR = 1000;
    private final AtomicLong totalRUs = new AtomicLong();

    public double getTotalRequestCharge() {
        return ((double) this.totalRUs.get()) / NUMBER_OF_DECIMAL_POINT_TO_RESERVE_FACTOR;
    }

    public void addCharge(double ruUsage) {
        this.totalRUs.addAndGet((long) (ruUsage * NUMBER_OF_DECIMAL_POINT_TO_RESERVE_FACTOR));
    }

    public double getAndResetCharge() {
        return (double) this.totalRUs.getAndSet(0) / NUMBER_OF_DECIMAL_POINT_TO_RESERVE_FACTOR;
    }
}