private string hashtag; // keep note of the hashtag we are tracking
public override async Task OnActivateAsync()
{
this.GetPrimaryKey(out hashtag);
this.State.Hashtag = hashtag;
// if this is our first ever activation, let the Counter Grain know
if (!this.State.BeenCounted)
{
// record that the grain has now been counted, and store the state
this.State.BeenCounted = true;
var counter = CounterFactory.GetGrain(0);
await Task.WhenAll(counter.IncrementCounter(), this.State.WriteStateAsync());
}
await base.OnActivateAsync();
}
/// <summary>
/// Get the score for a set of comma separated hashtags
/// </summary>
/// <param name="hashtags"></param>
/// <returns></returns>
public async Task <ActionResult> GetScores(string hashtags)
{
// get a handle the to dispatcher grain
var tweetGrain = TweetDispatcherGrainFactory.GetGrain(0);
// get the scores for the hashtags
var tweetGrainTask = tweetGrain.GetTotals(hashtags.ToLower().Split(','));
// get a handle the to counter grain
var counterGrain = CounterFactory.GetGrain(0);
// get the total number of hashtag activations
var counterGrainTask = counterGrain.GetTotalCounter();
// wait for tasks to complete
await Task.WhenAll(tweetGrainTask, counterGrainTask);
// return the json
return(Json(new object[] { tweetGrainTask.Result, counterGrainTask.Result }, JsonRequestBehavior.AllowGet));
}