PeerTube/server/helpers/database-utils.ts

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import retry from 'async/retry'
import Bluebird from 'bluebird'
import { Transaction } from 'sequelize'
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import { Model } from 'sequelize-typescript'
import { sequelizeTypescript } from '@server/initializers/database'
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import { logger } from './logger'
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function retryTransactionWrapper <T, A, B, C, D> (
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functionToRetry: (arg1: A, arg2: B, arg3: C, arg4: D) => Promise<T>,
arg1: A,
arg2: B,
arg3: C,
arg4: D,
): Promise<T>
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function retryTransactionWrapper <T, A, B, C> (
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functionToRetry: (arg1: A, arg2: B, arg3: C) => Promise<T>,
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arg1: A,
arg2: B,
arg3: C
): Promise<T>
function retryTransactionWrapper <T, A, B> (
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functionToRetry: (arg1: A, arg2: B) => Promise<T>,
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arg1: A,
arg2: B
): Promise<T>
function retryTransactionWrapper <T, A> (
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functionToRetry: (arg1: A) => Promise<T>,
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arg1: A
): Promise<T>
function retryTransactionWrapper <T> (
functionToRetry: () => Promise<T> | Bluebird<T>
): Promise<T>
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function retryTransactionWrapper <T> (
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functionToRetry: (...args: any[]) => Promise<T>,
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...args: any[]
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): Promise<T> {
return transactionRetryer<T>(callback => {
functionToRetry.apply(null, args)
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.then((result: T) => callback(null, result))
.catch(err => callback(err))
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})
.catch(err => {
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logger.warn(`Cannot execute ${functionToRetry.name} with many retries.`, { err })
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throw err
})
}
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function transactionRetryer <T> (func: (err: any, data: T) => any) {
return new Promise<T>((res, rej) => {
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retry(
{
times: 5,
errorFilter: err => {
const willRetry = (err.name === 'SequelizeDatabaseError')
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logger.debug('Maybe retrying the transaction function.', { willRetry, err, tags: [ 'sql', 'retry' ] })
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return willRetry
}
},
func,
(err, data) => err ? rej(err) : res(data)
)
})
}
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// ---------------------------------------------------------------------------
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function updateInstanceWithAnother <M, T extends U, U extends Model<M>> (instanceToUpdate: T, baseInstance: U) {
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const obj = baseInstance.toJSON()
for (const key of Object.keys(obj)) {
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instanceToUpdate[key] = obj[key]
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}
}
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function resetSequelizeInstance (instance: Model<any>, savedFields: object) {
Object.keys(savedFields).forEach(key => {
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instance[key] = savedFields[key]
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})
}
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function filterNonExistingModels <T extends { hasSameUniqueKeysThan (other: T): boolean }> (
fromDatabase: T[],
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newModels: T[]
) {
return fromDatabase.filter(f => !newModels.find(newModel => newModel.hasSameUniqueKeysThan(f)))
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}
function deleteAllModels <T extends Pick<Model, 'destroy'>> (models: T[], transaction: Transaction) {
return Promise.all(models.map(f => f.destroy({ transaction })))
}
// ---------------------------------------------------------------------------
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function runInReadCommittedTransaction <T> (fn: (t: Transaction) => Promise<T>) {
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const options = { isolationLevel: Transaction.ISOLATION_LEVELS.READ_COMMITTED }
return sequelizeTypescript.transaction(options, t => fn(t))
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}
function afterCommitIfTransaction (t: Transaction, fn: Function) {
if (t) return t.afterCommit(() => fn())
return fn()
}
// ---------------------------------------------------------------------------
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export {
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resetSequelizeInstance,
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retryTransactionWrapper,
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transactionRetryer,
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updateInstanceWithAnother,
afterCommitIfTransaction,
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filterNonExistingModels,
deleteAllModels,
runInReadCommittedTransaction
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}