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import * as retry from 'async/retry'
import * as Bluebird from 'bluebird'
import { Model } from 'sequelize-typescript'
import { logger } from './logger'
type RetryTransactionWrapperOptions = { errorMessage: string, arguments?: any[] }
function retryTransactionWrapper <T> (
functionToRetry: (...args) => Promise<T> | Bluebird<T>,
options: RetryTransactionWrapperOptions
): Promise<T> {
const args = options.arguments ? options.arguments : []
return transactionRetryer<T>(callback => {
functionToRetry.apply(this, args)
.then((result: T) => callback(null, result))
.catch(err => callback(err))
})
.catch(err => {
logger.error(options.errorMessage, err)
throw err
})
}
function transactionRetryer <T> (func: (err: any, data: T) => any) {
return new Promise<T>((res, rej) => {
retry({
times: 5,
errorFilter: err => {
const willRetry = (err.name === 'SequelizeDatabaseError')
logger.debug('Maybe retrying the transaction function.', { willRetry })
return willRetry
}
}, func, (err, data) => err ? rej(err) : res(data))
})
}
function updateInstanceWithAnother <T> (instanceToUpdate: Model<T>, baseInstance: Model<T>) {
const obj = baseInstance.toJSON()
for (const key of Object.keys(obj)) {
instanceToUpdate.set(key, obj[key])
}
}
// ---------------------------------------------------------------------------
export {
retryTransactionWrapper,
transactionRetryer,
updateInstanceWithAnother
}
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