Question

I have some queries made by GWT (2.4) RequestBuilder that might take a long time to execute. In these cases I’d like to allow the user cancelling the request. As it is only a query aborting the processing on the server side would not have any harmful side-effect. Even the wasted server side CPU cycles do not matter if the solution involves any. Here is an example of the situation:

RequestBuilder requestBuilder = new RequestBuilder(
    RequestBuilder.GET, FOOBAR_SERVICE_URL);

 requestBuilder.sendRequest("",
   new RequestCallback<ResultList>() { .... });

// I'd like to cancel the request when a Cancel button is pressed

Do you have any idea how to do this?

Answer 1

sendRequest() method of RequestBuilder returns instance Request class, which has cancel() method,which allows you to cancel request.

E.g.

RequestBuilder requestBuilder = new RequestBuilder(
    RequestBuilder.GET, FOOBAR_SERVICE_URL);

Request request = requestBuilder.sendRequest("",
   new RequestCallback<ResultList>() { .... });

...

//user clicked cancel button
request.cancel();