CODEWITHSUNDEEP
javascriptbreeze
Chris Small
Chris Small

Reputation: 363

BreezeJS central error handler and auto retry

Is there a way to for Breeze JS to auto retry in the case of a communications failure? Ideally I want to add a central event handler where based in the response, for example 401 I could prompt the user to re-login and then retry the request, or if its general connection problem give the user the option to Retry or Cancel?

I could add code at each request location to handle this, but that would be a lot of work, ideally this needs to be in a central location.

Upvotes: 1

Views: 142

Answers (1)

Jeremy Danyow
Jeremy Danyow

Reputation: 26406

You could put the retry logic in a request interceptor.

From the breeze docs:

Stock Breeze AJAX adapters offer an extension point, the requestInterceptor. This interceptor gives the developer one last look at each request before the adapter calls the actual AJAX component.
The interceptor takes a single parameter, the requestInfo, and returns nothing.

var requestInfo = {
        adapter: this,      // this AJAX adapter
        config: ...,        // the configuration object passed to the wrapped AJAX component
        dsaConfig: config,  // the config arg from the calling Breeze DataServiceAdapter
        success: successFn, // adapter's success callback
        error: errorFn      // adapter's error callback
}

Your request interceptor could wrap the error callback and add retry logic and 401 handling.

If you're using breeze with jQuery you could do this at a lower level, using jQuery's ajax prefilter.

Upvotes: 1

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