Retry mechanism for activities in Courier

[Emir Ključanin]

In the Sample-Courier app if I add UseRetry when registering 'ValidateActivity'  and then throw exception in Execute method of ValidateActivity it never calls Execute again.

This is the changed code for registering endpoint:

x.ReceiveEndpoint(host, ConfigurationManager.AppSettings["ValidateActivityQueue"], e =>

                {

                    e.UseRetry(c =>

                    {

                        c.Interval(5, TimeSpan.FromSeconds(3));

                    });

                    e.PrefetchCount = 100;

                    e.ExecuteActivityHost<ValidateActivity, ValidateArguments>(

                        DefaultConstructorExecuteActivityFactory<ValidateActivity, ValidateArguments>.ExecuteFactory);

                });

Should this work as I described or is it intended to work differently. Should the exception thrown in Execute method of an activity that has retry policy automatically call Compensate of activity that was executed before in the routing slip or should that be done if the last retry fails?

Thank you

[Emir Ključanin]

Well after playing around it seems that UseRetry needs to be used on ExecuteActivityHost configuration.

So changing the above code to:

x.ReceiveEndpoint(host, ConfigurationManager.AppSettings["RetrieveActivityQueue"], e =>

                {

                    e.PrefetchCount = 100;

                   

                    e.ExecuteActivityHost<RetrieveActivity, RetrieveArguments>(compAddress, c => c.UseRetry(r => r.Immediate(5)));

                });

seems to work (and also I needed to upgrade mass transit to 4.0.

Is this the right approach?

Thank you

[Emir Ključanin]

Here is the fork with the changes if anyone needs it https://github.com/kljuco/Sample-Courier

[Chris Patterson]

Yes, that's correct. It was added in v4

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[Emir Ključanin]

Thank you very much for the info :)

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