捕获所有异常或特定异常的断路器的最佳实践是什么？

Question

So I'm using Polly (fantastic) for a circuit breaker in C#.

I was using it to just catch a handful of exceptions when calling a web service, for example:

    _policy = Policy
        .Handle<TargetInvocationException>()
        .Or<CommunicationException>()
        .Or<EndpointNotFoundException>()
...

But I'm wondering if it would be far easier to just do:

   _policy = Policy
        .Handle<Exception>()

Then in the case of the service call having any issues of any kind I am covered. However I'm worried now that by doing this I'll cause myself issues in future that I haven't considered.

Any thoughts?

Answer 1

Sorry if I'm a bit late to the party but I just put together a library for just this situation and to allow for the circuit to run over different threads such as requests from a web server:

https://github.com/InvitationDigital/IDL.Net.CircuitBreaker

This allows you to catch your exceptions and only get circuit breaker errors when the circuit is open.