How to extend error handling code in Orchard?

Question

I am trying to add error-tracking service Raygun to Orchard, however I am not sure how to intercept exception thrown by the application.

In the default ASP.NET MVC it is usually done through Application_Error() in Global.asax.cs, is there a way to similarly do it in Orchard CMS?

The only way I found it to do is to explicitly put the code into the custom ErrorPage.cshtml.

Answer 1

The recommended way is to provide a custom implementation of the Orchard.Exceptions.IExceptionPolicy interface. In your scenario, you can use the default implementation DefaultExceptionPolicy as a fallback.

For example you can implement the following class in your custom Orchard module.

[OrchardSuppressDependency("Orchard.Exceptions.DefaultExceptionPolicy")] 
public class IssueTrackerExceptionPolicy : DefaultExceptionPolicy, IExceptionPolicy
{
    bool IExceptionPolicy.HandleException(object sender, Exception exception)
    {
        // TODO: Log exception here.

        return base.HandleException(sender, exception);
    }
}