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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 *    Copyright (c) [2018-2021] Payara Foundation and/or its affiliates. All rights reserved.
 *
 *     The contents of this file are subject to the terms of either the GNU
 *     General Public License Version 2 only ("GPL") or the Common Development
 *     and Distribution License("CDDL") (collectively, the "License").  You
 *     may not use this file except in compliance with the License.  You can
 *     obtain a copy of the License at
 *     https://github.com/payara/Payara/blob/master/LICENSE.txt
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 *     language governing permissions and limitations under the License.
 *
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 *     exception as provided by the Payara Foundation in the GPL Version 2 section of the License
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 * *****************************************************************************
 * Copyright 2010-2013 Coda Hale and Yammer, Inc.
 *
 * Licensed 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
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package fish.payara.microprofile.metrics.impl;

import java.util.concurrent.atomic.LongAdder;
import jakarta.enterprise.inject.Vetoed;
import org.eclipse.microprofile.metrics.Counter;

/**
 * An incrementing and decrementing counter metric.
 */
@Vetoed
public class CounterImpl implements Counter {

    private final LongAdder count = new LongAdder();

    /**
     * Increment the counter by one.
     */
    @Override
    public void inc() {
        inc(1);
    }

    /**
     * Increment the counter by {@code n}.
     *
     * @param n the amount by which the counter will be increased
     */
    @Override
    public void inc(long n) {
        count.add(n);
    }

    /**
     * Decrement the counter by one.
     * @deprecated since Payara 5.193; removed in MP Metrics 2.0
     */
    @Deprecated
    public void dec() {
        dec(1);
    }

    /**
     * Decrement the counter by {@code n}.
     *
     * @param n the amount by which the counter will be decreased
     * @deprecated since Payara 5.193; removed in MP Metrics 2.0
     */
    @Deprecated
    public void dec(long n) {
        count.add(-n);
    }

    /**
     * Returns the counter's current value.
     *
     * @return the counter's current value
     */
    @Override
    public long getCount() {
        return count.sum();
    }

    @Override
    public String toString() {
        return "Counter[" + getCount() + "]";
    }
}