Merge pull request #81 from danielgerlag/mongo-data-format

mongo data object format

Author: danielgerlag

src/providers/WorkflowCore.Persistence.MongoDB/Services/DataObjectSerializer.cs

@@ -1,5 +1,6 @@
 using MongoDB.Bson.Serialization;
 using MongoDB.Bson.Serialization.Serializers;
+using MongoDB.Bson;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -14,20 +15,26 @@ namespace WorkflowCore.Persistence.MongoDB.Services
     public class DataObjectSerializer : SerializerBase<object>
     {
         private static JsonSerializerSettings SerializerSettings = new JsonSerializerSettings() { TypeNameHandling = TypeNameHandling.All };
-
+        
         public override object Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
-        {                        
-            var raw = BsonSerializer.Deserialize<string>(context.Reader);
-            var result = JsonConvert.DeserializeObject(raw, SerializerSettings);
-            return result;
+        {
+            if (context.Reader.CurrentBsonType == BsonType.String)
+            {
+                var raw = BsonSerializer.Deserialize<string>(context.Reader);
+                return JsonConvert.DeserializeObject(raw, SerializerSettings);
+            }
+
+            return BsonSerializer.Deserialize(context.Reader, typeof(object));
         }
 
         public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, object value)
         {
             string str = JsonConvert.SerializeObject(value, SerializerSettings);
-            BsonSerializer.Serialize(context.Writer, str);
+            var doc = BsonDocument.Parse(str);
+            var typeElem = doc.GetElement("$type");
+            doc.InsertAt(0, new BsonElement("_t", typeElem.Value));
+            doc.RemoveElement(typeElem);
+            BsonSerializer.Serialize(context.Writer, doc);
         }
-                
-                
     }
 }

src/providers/WorkflowCore.Persistence.MongoDB/Services/MongoPersistenceProvider.cs

@@ -26,10 +26,6 @@ public MongoPersistenceProvider(IMongoDatabase database)
 
         static MongoPersistenceProvider()
         {
-            //BsonSerializer.RegisterDiscriminatorConvention(typeof(WorkflowStep), new AssemblyQualifiedDiscriminatorConvention());
-            //BsonSerializer.RegisterDiscriminatorConvention(typeof(Expression), new AssemblyQualifiedDiscriminatorConvention());
-            //BsonSerializer.RegisterSerializer(new DataMappingSerializer());
-
             BsonClassMap.RegisterClassMap<WorkflowInstance>(x =>
             {                
                 x.MapIdProperty(y => y.Id)                    

src/samples/WorkflowCore.Sample04/Program.cs

@@ -26,7 +26,7 @@ public static void Main(string[] args)
 
             var initialData = new MyDataClass();
             var workflowId = host.StartWorkflow("EventSampleWorkflow", 1, initialData).Result;
-
+            
             Console.WriteLine("Enter value to publish");
             string value = Console.ReadLine();
             host.PublishEvent("MyEvent", workflowId, value);