Asynchronous non blocking call from urlopen gateway script module.

Hi,

The urlopen.open() is asynchronous which is non-blocking, and accept a callback function.

“callback: The asynchronous function to call after the urlopen.open() connects, sends the data to the target, and the response header is parsed. The callback is in the function(error,response){} form. When a method has no response, use only the error object in the callback function; that is, function(error).” https://www.ibm.com/docs/en/datapower-gateway/10.5?topic=module-urlopenopen-connect-target-servers

You can also promisify urlopen.open() using the util module (https://www.ibm.com/docs/en/datapower-gateway/10.5?topic=apis-util-module#util_js__promisify) which will allow you to use promises. If you need is to execute two or more urlopen operations back to back, where each subsequent operation starts when the previous operation succeeds, with the result from the previous step, then promises will make it simpler.

So in summary in the context of the specific GatewayScript action , you can have several async operations running in parallel and there's no blocking, just as in node.js. However, GatewayScript action itself can’t be marked as async meaning that it does not complete until all outstanding async operations have completed.

Thank you for submitting this request. Please confirm that what you are requesting is a true Fire and Forget. If any failure happens at the protocol or payload there will be no further action taken by the Gateway including logging the issue even took place. If that is not the case please provide additional details on the business and technical requirements.