16.16Circuit breaker concept

Mule implementations vary, but know the architectural concept.

If Salesforce is clearly down:

request
↓
Salesforce FAIL

request
↓
Salesforce FAIL

request
↓
Salesforce FAIL

rather than hammer it continuously:

circuit opens
↓
fail fast / queue work
↓
periodically test recovery

This is a circuit breaker.

It protects both:

your application
and
downstream dependency

You don't need exact Mule component syntax unless they specifically ask.