Auth0 Rules Caching Logger

rule1.js

function boostrapRule(user, context, callback) {
    /**
     * Create a new Logger instance
     *
     * @returns {{log: (function(*=): number), commitLogs: (function(): void)}}
     */
    const loggerFactory = () => {
        const logs = [];
        const commitLogs = () => {
            if (logs.length === 0)
                return;
            console.log(logs);  // or SEND logs to your choice of enables; sumo, cloudwatch, etc
        };
        return {
            /**
             * Submit the log cache to sumo
             *
             * @return {(function(): void)}
             */
            commitLogs,
            /**
             * log a single message to the cache
             *
             * @param message - mesage to send to sumo
             * @returns {number}
             */
            log: (message) => logs.push(message),
            resetLogs: () => logs.length = 0, 
        };
    };
  
    global.loggerFactory = loggerFactory;
}

rule2.js

function mybusinesslogic(user, context, callback) {
  const { log, commitLogs, resetLogs } = global.loggerFactory();
  
  try {
      // do business logic
      log("step 1 for user: " + user.email);
      // more logic
      log("step 2 for user: " + user.email);
    
    log("finished success");
    if(random % 100 <= tracinglevel) {
      commitLogs();
    }
  } catch {
      log("facing exception", e);
      commitLogs();
  } finally {
      resetLogs();
  }
}