Error handling

Error handling is important in any application, especially one which has a long lifetime of running.

Handling errors in command and event modules

To capture errors, enable the ‘error’ event in sern’s global event manager.

• Directorysrc/

  • Directorycommands/

    • …
  • Directoryevents/

    • error.js
  • index.js
  • config.js
  • dependencies.d.ts

Tip

Don’t forget to enable event handling!

src/config.js

export const events = "./dist/events"

import { EventType, eventModule } from '@sern/handler'

export default eventModule({
    type: EventType.Sern,
    name: 'error',
    execute: (err) => {
        console.log('caught', err)
    }
})

If the error handler is not set, sern’s behavior is to crash the application. This respects node.js’s default behavior

Caution

Be careful about errors thrown IN the error handler. If this happens, a memory leaks occurs and your bot will crash.