server/helpers/database-utils.ts

   1 import * as retry from 'async/retry'
   2 import * as Bluebird from 'bluebird'
   3 import { Model } from 'sequelize-typescript'
   4 import { logger } from './logger'
   5
   6 type RetryTransactionWrapperOptions = { errorMessage: string, arguments?: any[] }
   7 function retryTransactionWrapper <T> (
   8   functionToRetry: (...args) => Promise<T> | Bluebird<T>,
   9   options: RetryTransactionWrapperOptions
  10 ): Promise<T> {
  11   const args = options.arguments ? options.arguments : []
  12
  13   return transactionRetryer<T>(callback => {
  14     functionToRetry.apply(this, args)
  15         .then((result: T) => callback(null, result))
  16         .catch(err => callback(err))
  17   })
  18   .catch(err => {
  19     logger.error(options.errorMessage, err)
  20     throw err
  21   })
  22 }
  23
  24 function transactionRetryer <T> (func: (err: any, data: T) => any) {
  25   return new Promise<T>((res, rej) => {
  26     retry({
  27       times: 5,
  28
  29       errorFilter: err => {
  30         const willRetry = (err.name === 'SequelizeDatabaseError')
  31         logger.debug('Maybe retrying the transaction function.', { willRetry })
  32         return willRetry
  33       }
  34     }, func, (err, data) => err ? rej(err) : res(data))
  35   })
  36 }
  37
  38 function updateInstanceWithAnother <T extends Model<T>> (instanceToUpdate: Model<T>, baseInstance: Model<T>) {
  39   const obj = baseInstance.toJSON()
  40
  41   for (const key of Object.keys(obj)) {
  42     instanceToUpdate.set(key, obj[key])
  43   }
  44 }
  45
  46 // ---------------------------------------------------------------------------
  47
  48 export {
  49   retryTransactionWrapper,
  50   transactionRetryer,
  51   updateInstanceWithAnother
  52 }