Figure 18.2: The circuit breaker as a state machine, not a mood
Figure 18.2 The circuit breaker as a state machine, not a mood. Closed, calls
flow and failures are counted; when they cross a threshold the breaker trips
open (in accent) and fails instantly, sparing a dead dependency the load and
the run the timeouts. After a cooldown it goes half-open and admits one trial
call, whose outcome alone decides whether the circuit closes again or
re-opens.
