lambda-monitor/lib/logic/bundler-handler.js

Lambda log monitoring and streaming to external services.

import objectScan from 'object-scan';
import Datadog from './util/datadog.js';

export default async (event, context) => {
  const datadog = Datadog();
  if (datadog === null) {
    return;
  }
  const arr = event.Records.map(({ body }) => JSON.parse(body));
  // Workaround since Datadog strips empty objects
  // Reference: https://docs.datadoghq.com/logs/log_configuration/parsing/?tab=matchers
  objectScan(['[*]**'], {
    filterFn: ({ parent, property, value }) => {
      if (value === null) {
        // eslint-disable-next-line no-param-reassign
        parent[property] = '<null>';
      } else if (value instanceof Object && Object.keys(value).length === 0) {
        // eslint-disable-next-line no-param-reassign
        parent[property] = `<empty ${JSON.stringify(value)}>`;
      }
    }
  })(arr);
  await datadog.Logger.uploadJsonArray(arr);
};