org.sentrysoftware.metricshub.agent.service.signal.AbstractSuppressZerosStateMetricObserver Maven / Gradle / Ivy

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package org.sentrysoftware.metricshub.agent.service.signal;

/*-
 * ╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲
 * MetricsHub Agent
 * ჻჻჻჻჻჻
 * Copyright 2023 - 2024 Sentry Software
 * ჻჻჻჻჻჻
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see .
 * ╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱
 */

import io.opentelemetry.api.common.Attributes;
import io.opentelemetry.api.metrics.Meter;
import io.opentelemetry.api.metrics.ObservableDoubleMeasurement;
import org.sentrysoftware.metricshub.engine.telemetry.metric.StateSetMetric;

/**
 * Abstract class for observing state set metrics by applying a suppression of zero values.
 * Extends {@link AbstractStateMetricObserver}.
 */
public abstract class AbstractSuppressZerosStateMetricObserver extends AbstractStateMetricObserver {

	/**
	 * Constructs a new {@code AbstractSuppressZerosStateMetricObserver} with the specified parameters.
	 *
	 * @param meter       The OpenTelemetry meter to use for creating the metric.
	 * @param attributes  The attributes to associate with the metric.
	 * @param metricName  The name of the metric.
	 * @param unit        The unit of the metric.
	 * @param description The description of the metric.
	 * @param state       The state used to observe the metric. E.g. "ok".
	 * @param metric      The StateSetMetric to observe.
	 */
	protected AbstractSuppressZerosStateMetricObserver(
		final Meter meter,
		final Attributes attributes,
		final String metricName,
		final String unit,
		final String description,
		final String state,
		final StateSetMetric metric
	) {
		super(meter, attributes, metricName, unit, description, state, metric);
	}

	@Override
	protected void recordMetricValue(final ObservableDoubleMeasurement recorder, final String value) {
		if (value.equalsIgnoreCase(state)) {
			recorder.record(1, attributes);
		} else {
			final String previousValue = metric.getPreviousValue();
			if (previousValue != null && !previousValue.equalsIgnoreCase(value) && previousValue.equalsIgnoreCase(state)) {
				recorder.record(0, attributes);
			}
		}
	}
}