+import Bluebird from 'bluebird'
+import { logger } from '../../helpers/logger'
+
export abstract class AbstractScheduler {
protected abstract schedulerIntervalMs: number
private interval: NodeJS.Timer
+ private isRunning = false
enable () {
if (!this.schedulerIntervalMs) throw new Error('Interval is not correctly set.')
clearInterval(this.interval)
}
- protected abstract execute ()
+ async execute () {
+ if (this.isRunning === true) return
+ this.isRunning = true
+
+ try {
+ await this.internalExecute()
+ } catch (err) {
+ logger.error('Cannot execute %s scheduler.', this.constructor.name, { err })
+ } finally {
+ this.isRunning = false
+ }
+ }
+
+ protected abstract internalExecute (): Promise<any> | Bluebird<any>
}