问在Polly策略回退中将Polly策略与访问已处理异常结合起来

EN

var p1 = Policy<string>
    .Handle<CosmosException>(ex => ex.StatusCode == HttpStatusCode.TooManyRequests)
    .WaitAndRetryForever(sleepDurationProvider: (_, dr, __) => ((CosmosException)dr.Exception).RetryAfter.Value,
                        onRetry: (_, __, ___) => { });
var p2 = Policy<string>
    .Handle<Exception>()
    .Fallback("Failure");

var p = Policy.Wrap(p1, p2);

var p2 = Policy<string>
    .Handle<Exception>()
    .Fallback(fallbackAction: (dr, _, __) => dr.Exception.Message,
              onFallback: (_, __) => { });

//user code

//to be decorated code which might throw exception

return "Success";

//user code

//The decorated code either return "Success" or throws CosmosException 
return combinedPolicy.Execute(...