Xamarin Gcm Network Manager await httpclient

Question

I'm using the Gcm Network Manager to schedule tasks, in one of those tasks I need to perform an HTTP request. Until now it was written with HttpWebRequest so nothing was async.

Now I would like to reuse code that is written with HttpClient and is async.

The problem that arrises is that I cannot make the OnRunTask() async as it needs to return an int:

e.g.

public override int OnRunTask(TaskParams @params)
{
    var result = await performSync();

    if(result)
    {
        return GcmNetworkManager.ResultSuccess;
    }

    return GcmNetworkManager.ResultReschedule;
}

What could I do to be able to reuse async code here ?

fandro · Accepted Answer · 2017-10-12T15:23:15.127

2

You can use Task.Run inside your OnRunTask method like this :

 Task.Run( async () =>
        {
             // Do your stuff here
             await asyncTask();
        });

You will no need to have OnRunTask async with this technique

Hope it helps

Edit

If you need the return value to match the framework / library signature, you can also use .Result

E.g.

var result = asyncTask().Result;
...

edited Oct 12 '17 at 15:23

answered Oct 12 '17 at 15:01

fandro

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How about the return value of the task ? – RVandersteen Oct 12 '17 at 15:03
@RVandersteen You can create a local variable before the task run and after the task run is done return it I think – fandro Oct 12 '17 at 15:06
@RVandersteen check this post it can maybe help you : https://stackoverflow.com/questions/18050836/getting-return-value-from-task-run – fandro Oct 12 '17 at 15:08
Oh it seems that you can use .Result instead of wait, thanks for the info ! – RVandersteen Oct 12 '17 at 15:16
Edit my answer if you have something more precise to add it can help other people – fandro Oct 12 '17 at 15:17

Xamarin Gcm Network Manager await httpclient

1 Answers1