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백그라운드에서 순차적으로 또는 분리된 리모트에서 해당이벤트를 처리할수 있습니다. ( AkkaRemote또는 Kafka가 활용될수 있습니다.)

여기서의 샘플은 Actor메시지 로컬메시지큐가 사용되어, 백그라운드에서 블락없이 작동되며 Remote로 확장또는 Kafka로의 연결로 확장할수 있습니다.

그래프 이벤트를 처리하는 액터

Code Block

theme	Emacs

namespace SearchApi.Actors
{
    public class GraphElementIdenty
    {
        public string Alice { get; set; }

        public string Name { get; set; }
    }

    public class GraphEvent
    {
        public string Action { get; set; } // Create , Relation, Reset

        public string Alice { get; set; } // AliceName

        public string Name { get; set; }

        public GraphElementIdenty From { get; set; }

        public GraphElementIdenty To { get; set; }
    }

    public class GraphEventActor : ReceiveActor
    {
        private readonly ILoggingAdapter logger = Context.GetLogger();        
        private readonly GraphEngine graphEngine;

        public GraphEventActor(GraphEngine _graphEngine)
        {
            logger.Info($"Create GraphEventActor:{Context.Self.Path.Name}");
            graphEngine = _graphEngine;

            ReceiveAsync<GraphEvent>(async graphEvent =>
            {
                var cypher = await _graphEngine.GetCypher();

                switch (graphEvent.Action)
                {
                    case "Reset":
                        {
                            await _graphEngine.RemoveAll();
                        }
                        break;
                    case "Create":
                        {                            
                            await cypher.Write
                                .Create($"(alice:{graphEvent.Alice} {{name:'{graphEvent.Name}'}})")
                                .ExecuteWithoutResultsAsync();
                        }
                        break;
                    case "Relation":
                        {
                            await cypher.Write
                                .Match($"(a:{graphEvent.From.Alice}),(b:{graphEvent.To.Alice})")
                                .Where($"a.name = '{graphEvent.From.Name}' AND b.name = '{graphEvent.To.Name}'")
                                .Create($"(a)-[r:{graphEvent.Name}]->(b)").ExecuteWithoutResultsAsync();
                        }
                        break;
                }
            });
        }
    }
}

추천데이터 이벤트를 심플하게 처리하는 액터기입니다.

Code Block

theme	Emacs
title	Graph 이벤트발생

var graphEngine = app.ApplicationServices.GetService<GraphEngine>();

var graphEventActor = AkkaLoad.RegisterActor(
    "GraphEventActor",
    actorSystem.ActorOf(Props.Create<GraphEventActor>(graphEngine),
        "GraphEventActor"
));

//Test For Graph
graphEventActor.Tell(new GraphEvent()
{
    Action = "Reset"
});

graphEventActor.Tell(new GraphEvent()
{
    Action = "Create",
    Alice = "Person",
    Name = "홍길동"
});

graphEventActor.Tell(new GraphEvent()
{
    Action = "Create",
    Alice = "Movie",
    Name = "스파이더맨"
});

graphEventActor.Tell(new GraphEvent()
{
    Action = "Relation",                            
    Name = "시청",
    From = new GraphElementIdenty()
    {
        Alice = "Person",
        Name = "홍길동"
    },
    To = new GraphElementIdenty()
    {
        Alice = "Movie",
        Name = "스파이더맨"
    }
});

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그래프 이벤트를 처리하는 액터