/*! Copyright (c) 2019, XAPPmedia */
export declare class MetricService {
    private static env;
    private static app;
    private static initialized;
    /**
     * Private constructor (don't instantiate)
     */
    private constructor();
    /**
     * Init once
     *
     * @param {string} app
     * @param {string} env
     */
    static init(app: string, env: string): void;
    /**
     * Convenience routine to start a time measurement
     */
    static start(): number;
    /**
     * Convenience routine to stop and gauge a time measurement
     *
     * @param metricName
     */
    static stop(metricName: string, metricTime: number, tags?: string[]): void;
    /**
     * Statsd style log for a counter
     *
     * @param name metric name. - it will be app.env.name
     * @param metricValue - count. default is 1.
     * @param tags - optional name value pair array like ["a=b", "c=d"]
     */
    static count(metricName: string, metricValue: number, tags?: string[]): void;
    /**
     * Count one occurrence
     *
     * @param metricName
     * @param tags
     */
    static countOnce(metricName: string, tags?: string[]): void;
    /**
     * Statsd style log for a gauge metric
     *
     * @param name metric name. - it will be app.env.name
     * @param metricValue
     * @param tags - optional name value pair array like ["a=b", "c=d"]
     */
    static gauge(metricName: string, metricValue: number, tags?: string[]): void;
    /**
     * The actual logger
     *
     * Format: MONITORING|unix_epoch_timestamp|metric_value|metricType|my.metric.name|#tag1:value,tag2
     *
     * @param name
     * @param metricType
     * @param metricValue
     * @param tags - optional name value pair array like ["a=b", "c=d"]
     */
    private static metric;
    /**
     * Compose metric name
     *
     * @param metricName
     * @returns {string}
     */
    private static fullName;
}