[winmd servicebus] getMessageAsync on an empty message queue returns cancelled error

[deepakverma]

winmd code: https://github.com/aliakb/azure-sdk-for-net/blob/Clean/microsoft-azure-servicelayer/Microsoft.WindowsAzure.ServiceLayer/ServiceBus/IServiceBusService.cs

For an empty Servicebus queue getMessageAsync call returns cancelled error.

Expected: To return success with null result that the application can process on. An empty queue should not be treated as an exception.

for example in JS, I want to check if message is received then process on it. Empty queue is also a valid state and should not throw an exception.

sb.getMessageAsync("myq", 20).then(
function (result) {
if(result!=null)
logOutput("Received message" + result.text);

    },
    function (result) {
        logOutput("error receiving message" + result);
    }
    );

[toddysm]

We should be consistent with peekMessage() and throw exceptions in both cases.

[aliakb]

This was fixed some time ago; now we're throwing an exception in both cases.

[aliakb]

Closing.