io.questdb.metrics.CounterImpl Maven / Gradle / Ivy

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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2023 QuestDB
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 *  http://www.apache.org/licenses/LICENSE-2.0
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package io.questdb.metrics;

import io.questdb.std.str.CharSink;

import java.util.concurrent.atomic.LongAdder;

class CounterImpl implements Counter {
    private final LongAdder counter;
    private final CharSequence name;

    CounterImpl(CharSequence name) {
        this.name = name;
        this.counter = new LongAdder();
    }

    @Override
    public void add(long value) {
        counter.add(value);
    }

    @Override
    public long getValue() {
        return counter.sum();
    }

    @Override
    public void scrapeIntoPrometheus(CharSink sink) {
        PrometheusFormatUtils.appendCounterType(name, sink);
        PrometheusFormatUtils.appendCounterNamePrefix(name, sink);
        PrometheusFormatUtils.appendSampleLineSuffix(sink, counter.longValue());
        PrometheusFormatUtils.appendNewLine(sink);
    }
}