Logging Solution

A uniform logging soution to simplify logging adoption across systems by abstrating out and maintaing underlying logging dependecies.

Working

• It uses winston internally currently and provides functionality of log rotation on a daily basis.
• Given all dependecies are controlled via the abstraction, testing on single service can be used to rollout changes throughout the system.

Functions

• initLogger :

  • Used to initite logger for the service

  • Params : service or log index name

    const Logger = require('@uc-engg/logging-repo').initLogger(LOG_INDEX_NAME);

• info :

  • Used to log given data in info mode
  • Params : json key:value pair

  let data = {};
  data.key_1 = 'event_name';
  data.key_1_value = eventName;
  data.key_2 = 'event_type';
  data.key_2_value = eventType;
  data.key_3 = "info";
  data.key_3_value = (info === null || info === undefined) ? "" : info.toString();
  if (responseTime != null || responseTime != undefined) {
    data.numkey_1 = 'response_time_ms';
    data.numkey_1_value = responseTime;
  }
  if (dataLength != null || dataLength != undefined) {
    data.numkey_2 = 'data_length';
    data.numkey_2_value = dataLength;
  }
  data.log_type = LOG_TYPE;
  data.message = JSON.stringify({
    service_name: serviceName,
    message: message
  });
  Logger.info(data);

• error :

  • Used to log given data in error mode
  • Params : json key:value pair

  let data = {};
  data.key_1 = 'event_name';
  data.key_1_value = eventName;
  data.key_2 = 'event_type';
  data.key_2_value = eventType;
  if (cacheKey){
    data.key_3 = "cache_key";
    data.key_3_value = cacheKey;
  }
  if (responseTime != null || responseTime != undefined) {
    data.numkey_1 = 'response_time_ms';
    data.numkey_1_value = responseTime;
  }
  if (dataLength != null || dataLength != undefined) {
    data.numkey_2 = 'data_length';
    data.numkey_2_value = dataLength;
  }
  data.error_message = JSON.stringify(error);
  data.log_type = LOG_TYPE;
  data.message = JSON.stringify({
    service_name: serviceName
  });
  Logger.error(data);

• debug :

  • Used to log given data in debug mode
  • Params : json key:value pair

   let data = {};
   data.key_1 = 'event_name';
   data.key_1_value = eventName;
   data.key_2 = 'event_type';
   data.key_2_value = eventType;
   if (cacheKey){
     data.key_3 = "cache_key";
     data.key_3_value = cacheKey;
   }
   data.log_type = LOG_TYPE;
   data.message = JSON.stringify({
     info : debugInfo,
   });
   Logger.debug(data);

• exitAfterFlush :

  • Flushes the logs to the files and exit

  Logger.exitAfterFlush();