@hoangnam.io/qa-tools/logging/logger.js

Logging, Error handling, Notifying for Express codebase

const { MongoClient } = require("mongodb");
const { Logging } = require("@google-cloud/logging");
const { LogLevel } = require("./constance");
const noOpsLogger = { log: () => {} };

function getLogger({ mongoConfig, enableConsoleLog = true, gcProjectId, logName = "request_logs" }) {
  const mongoLogger = getMongoLogger(mongoConfig);
  const consoleLogger = getConsoleLogger(enableConsoleLog, gcProjectId);
  const gcLogger = getGGCloudLogger(gcProjectId, logName);
  return {
    log: (logObject) => {
      consoleLogger.log(logObject);
      gcLogger.log(logObject);
      mongoLogger.log(logObject);
    },
  };
}

function getMongoLogger(mongoConfig) {
  if (!mongoConfig.connectionString) return noOpsLogger;
  const client = new MongoClient(mongoConfig.connectionString);
  const connection = client.connect();
  return {
    log: async (logObject) => {
      try {
        const coll = (await connection).db().collection(mongoConfig.collectionName);
        await coll.insertOne(logObject);
      } catch (error) {
        console.error(`MongoLogger log failed: ${error.toString()}`);
      }
    },
  };
}

function getConsoleLogger(enableConsoleLog, gcProjectId) {
  if (!enableConsoleLog) return noOpsLogger;
  return {
    log: (logObject) => {
      const enrichedLog = addGCTraceInfo(gcProjectId, logObject);
      if (enrichedLog.status >= 400) console.error(enrichedLog);
      else console.log(enrichedLog);
    },
  };
}

function getGGCloudLogger(gcProjectId, logName = "logs") {
  if (!process.env.GOOGLE_APPLICATION_CREDENTIALS) return noOpsLogger;
  const logging = new Logging();
  const logger = logging.log(logName);
  return {
    log: async (logObject) => {
      try {
        const enrichedLog = addGCTraceInfo(gcProjectId, logObject);
        const severity = enrichedLog.status >= 400 ? LogLevel.ERROR : LogLevel.INFO;
        const jsonEntry = logger.entry({ severity }, enrichedLog);
        await logger.write(jsonEntry);
      } catch (error) {
        console.error(`GGCloudLogger log failed: ${error.toString()}`);
      }
    },
  };
}

function addGCTraceInfo(gcProjectId, logObject) {
  if (!gcProjectId || !logObject.traceId) return logObject;
  return {
    ...logObject,
    "logging.googleapis.com/trace": `projects/${gcProjectId}/traces/${logObject.traceId}`,
    "logging.googleapis.com/spanId": logObject.spanId,
  };
}

module.exports = { getMongoLogger, getConsoleLogger, getGGCloudLogger, getLogger };