resiliency-try-catch.cs

using static ResilientOperation;

int failureCount = 0;

var result = await Try(() =>
    {
        // Fail 3 times
        // return 404 (which is somehow transient, think getting a transient 404)
        // after 4 retries finally get the correct value: 5 on iteration 5

        if (failureCount < 3)
        {
            failureCount++;
            throw new Exception("transient");
        }
        
        if (failureCount < 4)
        {
            failureCount++;
            return 5;
        }

        return 404;
    })
    .Catch<Exception>(when: ex => ex.Message == "transient", async (op, ex) =>
    {
        if (op.CurrentAttempt < 4)
        {
            await op.RetryAfterAsync(TimeSpan.FromMilliseconds(100));
        }
    })
    .CatchResult(when: result => result == 404, async (op, result) =>
    {
        await op.RetryAfterAsync(TimeSpan.FromMilliseconds(100));
    })
    .InvokeAsync();