Added options for loading/saving on start/stop

Some times people may want to just save at an arbitrary time for debugging purposes etc.

Author: grofit

src/EcsRx.Examples/ExampleApps/LoadingEntityDatabase/LoadingEntityDatabaseApplication.cs

@@ -15,7 +15,7 @@ public class LoadingEntityDatabaseApplication : EcsRxPersistedApplication
 
         // Tell it to look for the JSON file now rather than the binary one
         public override string EntityDatabaseFile => JsonEntityDatabaseModule.CustomEntityDatabaseFile;
-
+        
         private bool _quit;
 
         protected override void LoadModules()

src/EcsRx.Plugins.Persistence/EcsRxPersistedApplication.cs

@@ -14,6 +14,8 @@ public abstract class EcsRxPersistedApplication : EcsRxApplication
         public ILoadEntityDatabasePipeline LoadEntityDatabasePipeline;
 
         public virtual string EntityDatabaseFile => PersistityModule.DefaultEntityDatabaseFile;
+        public virtual bool LoadOnStart => true;
+        public virtual bool SaveOnStop => true;
 
         protected override void LoadPlugins()
         {
@@ -26,7 +28,9 @@ protected override void ResolveApplicationDependencies()
             SaveEntityDatabasePipeline = Container.Resolve<ISaveEntityDatabasePipeline>();
             LoadEntityDatabasePipeline = Container.Resolve<ILoadEntityDatabasePipeline>();
 
-            LoadEntityDatabase().Wait();
+            if(LoadOnStart)
+            { LoadEntityDatabase().Wait(); }
+            
             base.ResolveApplicationDependencies();
         }
 
@@ -45,5 +49,13 @@ protected virtual Task SaveEntityDatabase()
             // Update our database with any changes that have happened since it loaded
             return SaveEntityDatabasePipeline.Execute(EntityCollectionManager.EntityDatabase, null);
         }
+
+        public override void StopApplication()
+        {
+            if(SaveOnStop)
+            { SaveEntityDatabase().Wait(); }
+            
+            base.StopApplication();
+        }
     }
 }