@kangc/skywalking-backend-js/lib/logging/index.js

The NodeJS agent for Apache SkyWalking

"use strict";
/*!
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 *
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.createLogger = void 0;
var tslib_1 = require("tslib");
var winston = tslib_1.__importStar(require("winston"));
function createLogger(name) {
    var loggingLevel = (process.env.SW_AGENT_LOGGING_LEVEL || 'error').toLowerCase();
    var logger = winston.createLogger({
        level: loggingLevel,
        format: winston.format.json(),
        defaultMeta: {
            file: name,
        },
    });
    if (process.env.NODE_ENV !== 'production' || process.env.SW_LOGGING_TARGET === 'console') {
        logger.add(new winston.transports.Console({
            format: winston.format.prettyPrint(),
        }));
    }
    else {
        logger.add(new winston.transports.File({
            filename: 'skywalking.log',
        }));
    }
    var loggerLevel = logger.levels[logger.level];
    var _isDebugEnabled = loggerLevel >= logger.levels.debug;
    var _isInfoEnabled = loggerLevel >= logger.levels.info;
    Object.assign(logger, {
        _isDebugEnabled: _isDebugEnabled,
        _isInfoEnabled: _isInfoEnabled,
    });
    var nop = function () {
        /* a cookie for the linter */
    };
    if (loggerLevel < logger.levels.debug)
        // we do this because logger still seems to stringify anything sent to it even if it is below the logging level, costing performance
        logger.debug = nop;
    if (loggerLevel < logger.levels.info)
        logger.info = nop;
    if (loggerLevel < logger.levels.warn)
        logger.warn = nop;
    return logger;
}
exports.createLogger = createLogger;
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