syntropylog/dist/logger/transports/ConsoleTransport.js

An instance manager with observability for Node.js applications

import { Transport } from './Transport';
/**
 * @class ConsoleTransport
 * @description A transport that writes logs to the console as a single, serialized JSON string.
 * This format is ideal for log aggregation systems that can parse JSON.
 * @extends {Transport}
 */
export class ConsoleTransport extends Transport {
    /**
     * @constructor
     * @param {TransportOptions} [options] - Options for the transport, including level, formatter, and a sanitization engine.
     */
    constructor(options) {
        super(options);
    }
    /**
     * Logs a structured entry to the console as a single JSON string.
     * The entry is first formatted (if a formatter is provided) and then sanitized
     * before being written to the console.
     * @param {LogEntry} entry - The log entry to process.
     * @returns {Promise<void>}
     */
    async log(entry) {
        if (!this.isLevelEnabled(entry.level)) {
            return;
        }
        const finalObject = this.formatter ? this.formatter.format(entry) : entry;
        const logString = JSON.stringify(finalObject);
        switch (entry.level) {
            case 'fatal':
            case 'error':
                console.error(logString);
                break;
            case 'warn':
                console.warn(logString);
                break;
            default:
                console.log(logString);
                break;
        }
    }
}
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