server/helpers/database-utils.ts

   1 // TODO: import from ES6 when retry typing file will include errorFilter function
   2 import * as retry from 'async/retry'
   3 import * as Bluebird from 'bluebird'
   4 import { logger } from './logger'
   5
   6 type RetryTransactionWrapperOptions = { errorMessage: string, arguments?: any[] }
   7 function retryTransactionWrapper (functionToRetry: (...args) => Promise<any> | Bluebird<any>, options: RetryTransactionWrapperOptions) {
   8   const args = options.arguments ? options.arguments : []
   9
  10   return transactionRetryer(callback => {
  11     functionToRetry.apply(this, args)
  12         .then(result => callback(null, result))
  13         .catch(err => callback(err))
  14   })
  15   .catch(err => {
  16     logger.error(options.errorMessage, err)
  17     throw err
  18   })
  19 }
  20
  21 function transactionRetryer (func: Function) {
  22   return new Promise((res, rej) => {
  23     retry({
  24       times: 5,
  25
  26       errorFilter: err => {
  27         const willRetry = (err.name === 'SequelizeDatabaseError')
  28         logger.debug('Maybe retrying the transaction function.', { willRetry })
  29         return willRetry
  30       }
  31     }, func, (err, data) => err ? rej(err) : res(data))
  32   })
  33 }
  34
  35 // ---------------------------------------------------------------------------
  36
  37 export {
  38   retryTransactionWrapper,
  39   transactionRetryer
  40 }