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Tips from NDC Oslo 2019 - Polly.NET policy wrapping

I do like Polly.NET, the “resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner”(quoted from the website).

One of the nice things you can do in Polly is combining multiple policies to achieve more complex functionality:

fallback.Execute(() => waitAndRetry.Execute(() => breaker.Execute(action)));
view raw CombiningPoliciesWithNesting.cs hosted with ❤ by GitHub

This works but requires some ugly nesting. A better approach I learned at NDC was through PolicyWrap:

Policy.Wrap(fallback, waitAndRetry, breaker).Execute(action);
view raw CombiningPoliciesWithWrap.cs hosted with ❤ by GitHub

More information here: https://github.com/App-vNext/Polly/wiki/PolicyWrap

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