@azure/monitor-opentelemetry/dist/commonjs/loader.js

Azure Monitor OpenTelemetry (Node.js)

"use strict";
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
Object.defineProperty(exports, "__esModule", { value: true });
const tslib_1 = require("tslib");
/**
 * ESM Loader entry point for Azure Monitor OpenTelemetry.
 *
 * For ESM applications, this loader MUST be used with the --import flag to ensure
 * instrumentation hooks are registered before any application modules are loaded.
 * This is required because ESM modules cannot be instrumented after they are loaded.
 *
 * Usage: node --import \@azure/monitor-opentelemetry/loader \<your-app-entry-point\>
 */
const nodeModule = tslib_1.__importStar(require("node:module"));
const index_js_1 = require("./shared/logging/index.js");
const module_js_1 = require("./shared/module.js");
const OTEL_LOADER_SPECIFIER = "@opentelemetry/instrumentation/hook.mjs";
// Register the OpenTelemetry instrumentation loader immediately when this module is imported
const registerFn = nodeModule
    .register;
if (typeof registerFn === "function") {
    const parentURL = (0, module_js_1.getModuleParentURL)();
    if (parentURL) {
        try {
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            const result = registerFn(OTEL_LOADER_SPECIFIER, parentURL);
            // Handle potential promise rejection (Node.js 20.6+ returns a promise-like object)
            if (result && typeof result.catch === "function") {
                void result.catch((error) => {
                    index_js_1.Logger.getInstance().warn("Failed to register OpenTelemetry instrumentation loader", error);
                });
            }
        }
        catch (error) {
            index_js_1.Logger.getInstance().warn("Failed to register OpenTelemetry instrumentation loader", error);
        }
    }
}
//# sourceMappingURL=loader.js.map