@message-queue-toolkit/metrics/dist/lib/prometheus/PrometheusMessageMetric.js

Utilities for collecting metrics in message-queue-toolkit

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.PrometheusMessageMetric = void 0;
const tslib_1 = require("tslib");
const prom_client_1 = tslib_1.__importDefault(require("prom-client"));
/**w
 * Implementation of MessageMetricsManager for Prometheus
 */
class PrometheusMessageMetric {
    /** Fallbacks to null if metrics are disabled on app level */
    metric;
    messageVersionGeneratingFunction;
    metricParams;
    /**
     * @param metricParams - metrics parameters (see PrometheusMetricParams)
     * @param client - use it to specify custom Prometheus client
     */
    constructor(metricParams, client) {
        this.metricParams = metricParams;
        this.messageVersionGeneratingFunction =
            this.resolveMessageVersionGeneratingFunction(metricParams);
        this.metric = this.registerMetric(client ?? prom_client_1.default);
    }
    registerMetric(client) {
        const existingMetric = client.register.getSingleMetric(this.metricParams.name);
        return existingMetric
            ? existingMetric
            : this.createMetric(client, this.metricParams);
    }
    resolveMessageVersionGeneratingFunction(metricParams) {
        const messageVersion = metricParams.messageVersion;
        return typeof messageVersion === 'function' ? messageVersion : () => messageVersion;
    }
}
exports.PrometheusMessageMetric = PrometheusMessageMetric;
//# sourceMappingURL=PrometheusMessageMetric.js.map