io.prometheus.jmx.MatchedRule Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jmx_prometheus_httpserver Show documentation

See https://github.com/prometheus/jmx_exporter/blob/master/README.md

There is a newer version: 1.0.1

Show newest version

/*
 * Copyright (C) 2020-2023 The Prometheus jmx_exporter Authors
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.prometheus.jmx;

import java.util.List;

/**
 * MatchedRule is the result of matching a JMX bean against the rules present in the configuration
 * file. As rules are matched using regular expressions, caching helps prevent having to match the
 * same beans to the same list of regular expressions.
 */
public class MatchedRule {

    final String name;
    final String matchName;
    final String type;
    final String help;
    final List labelNames;
    final List labelValues;
    final Double value;
    final double valueFactor;

    private static final MatchedRule _unmatched = new MatchedRule();

    private MatchedRule() {
        this.name = null;
        this.matchName = null;
        this.type = null;
        this.help = null;
        this.labelNames = null;
        this.labelValues = null;
        this.value = null;
        this.valueFactor = 1.0;
    }

    public MatchedRule(
            final String name,
            final String matchName,
            final String type,
            final String help,
            final List labelNames,
            final List labelValues,
            final Double value,
            double valueFactor) {
        this.name = name;
        this.matchName = matchName;
        this.type = type;
        this.help = help;
        this.labelNames = labelNames;
        this.labelValues = labelValues;
        this.value = value;
        this.valueFactor = valueFactor;
    }

    /**
     * An unmatched MatchedRule, used when no rule matching a JMX bean has been found in the
     * configuration. Cached unmatched rules are still a cache hit, that will not produce any
     * metric/value.
     *
     * @return the invalid rule
     */
    public static MatchedRule unmatched() {
        return _unmatched;
    }

    public boolean isUnmatched() {
        return this == _unmatched;
    }

    public boolean isMatched() {
        return !isUnmatched();
    }
}