surel
This is an app with following configuration:
browser -> app <- server-to-server http request -> api <- event -> queue -> sender -> [ service1, service2, service3 ]
^
|
`-- arenaA single page app (written in preact) is served by a koa app, talks to api. Each request received by api then
will be scheduled to a redis-based queue bull. Fortunately, there is a monitoring app for bull, i.e. (arena)[https://github.com/mixmaxhq/arena].
The fallback mechanism is controlled by the app rather than automatically handled by the api or queue.
By detecting the suggested next service.
E.g. for successful attempt of sending mail
Gives
And
E.g. for failure, i.e. using mailgun with unknown to email, we get
