Refractor retry transaction function

[oweals/peertube.git] / server / helpers / database-utils.ts

diff --git a/server/helpers/database-utils.ts b/server/helpers/database-utils.ts
index f8ee9a45424e6c9e69fa70635e350cadeec1df17..9b861a88ccd3c417bf963ae659979ab57c28482b 100644 (file)
--- a/server/helpers/database-utils.ts
+++ b/server/helpers/database-utils.ts
@@ -1,70 +1,71 @@
-import * as Sequelize from 'sequelize'
-// TODO: import from ES6 when retry typing file will include errorFilter function
 import * as retry from 'async/retry'
-
-import { database as db } from '../initializers/database'
+import * as Bluebird from 'bluebird'
+import { Model } from 'sequelize-typescript'
 import { logger } from './logger'
 
-function commitTransaction (t: Sequelize.Transaction, callback: (err: Error) => void) {
-  return t.commit().asCallback(callback)
-}
-
-function rollbackTransaction (err: Error, t: Sequelize.Transaction, callback: (err: Error) => void) {
-  // Try to rollback transaction
-  if (t) {
-    // Do not catch err, report the original one
-    t.rollback().asCallback(function () {
-      return callback(err)
-    })
-  } else {
-    return callback(err)
-  }
-}
+function retryTransactionWrapper <T, A, B, C> (
+  functionToRetry: (arg1: A, arg2: B, arg3: C) => Promise<T> | Bluebird<T>,
+  arg1: A,
+  arg2: B,
+  arg3: C
+): Promise<T>
 
-type RetryTransactionWrapperOptions = { errorMessage: string, arguments?: any[] }
-function retryTransactionWrapper (functionToRetry: Function, options: RetryTransactionWrapperOptions, finalCallback: Function) {
-  const args = options.arguments ? options.arguments : []
+function retryTransactionWrapper <T, A, B> (
+  functionToRetry: (arg1: A, arg2: B) => Promise<T> | Bluebird<T>,
+  arg1: A,
+  arg2: B
+): Promise<T>
 
-  transactionRetryer(
-    function (callback) {
-      return functionToRetry.apply(this, args.concat([ callback ]))
-    },
-    function (err) {
-      if (err) {
-        logger.error(options.errorMessage, { error: err })
-      }
+function retryTransactionWrapper <T, A> (
+  functionToRetry: (arg1: A) => Promise<T> | Bluebird<T>,
+  arg1: A
+): Promise<T>
 
-      // Do not return the error, continue the process
-      return finalCallback(null)
-    }
-  )
+function retryTransactionWrapper <T> (
+  functionToRetry: (...args: any[]) => Promise<T> | Bluebird<T>,
+  ...args: any[]
+): Promise<T> {
+  return transactionRetryer<T>(callback => {
+    functionToRetry.apply(this, args)
+        .then((result: T) => callback(null, result))
+        .catch(err => callback(err))
+  })
+  .catch(err => {
+    logger.error('Cannot execute %s with many retries.', functionToRetry.toString(), { err })
+    throw err
+  })
 }
 
-function transactionRetryer (func: Function, callback: (err: Error) => void) {
-  retry({
-    times: 5,
+function transactionRetryer <T> (func: (err: any, data: T) => any) {
+  return new Promise<T>((res, rej) => {
+    retry(
+      {
+        times: 5,
 
-    errorFilter: function (err) {
-      const willRetry = (err.name === 'SequelizeDatabaseError')
-      logger.debug('Maybe retrying the transaction function.', { willRetry })
-      return willRetry
-    }
-  }, func, callback)
+        errorFilter: err => {
+          const willRetry = (err.name === 'SequelizeDatabaseError')
+          logger.debug('Maybe retrying the transaction function.', { willRetry, err })
+          return willRetry
+        }
+      },
+      func,
+      (err, data) => err ? rej(err) : res(data)
+    )
+  })
 }
 
-function startSerializableTransaction (callback: (err: Error, t: Sequelize.Transaction) => void) {
-  db.sequelize.transaction(/* { isolationLevel: 'SERIALIZABLE' } */).asCallback(function (err, t) {
-    // We force to return only two parameters
-    return callback(err, t)
-  })
+function updateInstanceWithAnother <T extends Model<T>> (instanceToUpdate: Model<T>, baseInstance: Model<T>) {
+  const obj = baseInstance.toJSON()
+
+  for (const key of Object.keys(obj)) {
+    instanceToUpdate.set(key, obj[key])
+  }
 }
 
 // ---------------------------------------------------------------------------
 
 export {
-  commitTransaction,
   retryTransactionWrapper,
-  rollbackTransaction,
-  startSerializableTransaction,
-  transactionRetryer
+  transactionRetryer,
+  updateInstanceWithAnother
 }