Fast fix fox calling OrientDB for every parent recalculation

Long-term solutions should be separating creation and storage time (using temporary ids before confirmation is received from storage engine)

Author: aurelijusb

README.md

@@ -78,9 +78,10 @@ Known Issues
  * After gen-idea, no compiler library found
    - Project settings -> Libraries -> *scala-library* -> Classes: Add from ~/.sbt/boot/*/scala-*
    - Project settings -> Facets -> Compiler library: Choose *scaka-library*
- * `JavaFx` runtime is only in `Oracle JRE 1.7+`, not in OpenJRE.
+ * `JavaFx` runtime is only in `Oracle JRE 1.7+`, in OpenJRE it must installed separately
    - Internet is full of [examples](https://www.digitalocean.com/community/tutorials/how-to-install-java-on-ubuntu-with-apt-get)
      how to install Oracle Java and make it as default.
+   - For Ubuntu and OpenJRE: `sudo apt-get install default-jre openjfx`  
 
 Useful links (for developers)
 -----------------------------

auginte-desktop/src/main/scala/com/auginte/desktop/View.scala

@@ -45,12 +45,19 @@ with Saving[jp] with Loading[jp] with WithFileChooser {
   // Infinity zooming and refresh
   //
 
+  @volatile var coordinatesInProgress = false
+
   private val grid2absoluteCron = new Timeline {
     cycleCount = Timeline.Indefinite
     keyFrames = Seq(
       jfxKeyFrame2sfx(new KeyFrame(
-        Duration(10),
-        (e: ActionEvent) => absoluteToCachedCoordinates()
+        Duration(40),
+        (e: ActionEvent) =>
+          if (!coordinatesInProgress) {
+            coordinatesInProgress = true
+            absoluteToCachedCoordinates()
+            coordinatesInProgress = false
+          }
       ))
     )
   }
@@ -134,4 +141,4 @@ with Saving[jp] with Loading[jp] with WithFileChooser {
       case e: Exception => println(s"Saving failed: $e")
     }
   }
-}
+}

auginte-distribution/src/main/scala/com/auginte/distribution/orientdb/Node.scala

@@ -29,6 +29,9 @@ class Node(val _x: Byte = 0, val _y: Byte = 0, protected val cache: Cache[Node]
 
   private[auginte] val checkParentsConsistency = false // Useful for testing, but disabled in production
 
+  private var loaded = false
+  private var cachedParent: Option[zooming.Node] = None
+
   //
   // Structure
   //
@@ -51,7 +54,19 @@ class Node(val _x: Byte = 0, val _y: Byte = 0, protected val cache: Cache[Node]
 
   override def y: Byte = get[Byte]("y", _y)
 
-  override def parent: Option[zooming.Node] = if (isPersisted) cache(edge("out_Parent")) else super.parent
+
+  override def parent: Option[zooming.Node] = if (loaded) {
+    cachedParent
+  } else {
+    if (isPersisted) {
+      val rez = cache(edge("out_Parent"))
+      cachedParent = rez
+      if (rez.isDefined) {
+        loaded = true
+      }
+      rez
+    } else super.parent
+  }
 
   override def children: List[zooming.Node] = if (isPersisted) cache(edges("in_Parent")).toList else super.children