# Circuit breaker
## Introduction go chassis allows you to define how to handle errors, if a remote call fails
## Usage
1.Implement your fallback logic
`go
//Fallback defines how to return response if remote call fails
//a implementation should return a closure to handle the error
//in this closure, if you fallback logic should handle the original error,
//you can return a fallback error to replace the original error
//you can assemble invocation.Response on demand
//in summary the closure defines, if err happens, how to handle it.
type Fallback func(inv *invocation.Invocation, finish chan *invocation.Response) func(error) error
`
2.Register function to go chassis
`go
circuit.RegisterFallback("your_fallback", f)
`
3 operate circuit_breaker.yaml to use custom fallback
- fallbackpolicy:
- Consumer:
policy: your_fallback