Fix deadlock in DistrictDiagramViewer event queuing

[simantics/district.git] / org.simantics.district.network.ui / src / org / simantics / district / network / ui / DistrictDiagramViewer.java

diff --git a/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictDiagramViewer.java b/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictDiagramViewer.java
index d7f530dfd025e8df8ff49a8e5077841ac4ceeec1..d932e0834a2cd2016c3092e5581850c24338af07 100644 (file)
--- a/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictDiagramViewer.java
+++ b/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictDiagramViewer.java
@@ -183,41 +183,32 @@ public class DistrictDiagramViewer extends DiagramViewer {
 
     
     private void queueColoringObjectsChangeEvent(Map<String, DynamicColorContribution> result) {
-        if (result != null && !canvasContext.isDisposed()) {
-            canvasContext.getDefaultHintContext().setHint(KEY_MAP_COLORING_OBJECTS, result);
-            canvasContext.getEventQueue().queueEvent(new CommandEvent(canvasContext, System.currentTimeMillis(), MAP_COLORING_OBJECTS_CHANGE));
-        } else {
-            LOGGER.info("Result is either null or canvasContext is disposed", String.valueOf(result));
-        }
+        queueEventInternal(KEY_MAP_COLORING_OBJECTS, MAP_COLORING_OBJECTS_CHANGE, result);
     }
     
     private void queueColorBarOptionsChangeEvent(ColorBarOptions result) {
-        if (result != null && !canvasContext.isDisposed()) {
-            canvasContext.getDefaultHintContext().setHint(KEY_MAP_COLOR_BAR_OPTIONS, result);
-            canvasContext.getEventQueue().queueEvent(new CommandEvent(canvasContext, System.currentTimeMillis(), MAP_COLOR_BAR_OPTIONS_CHANGE));
-        } else {
-            LOGGER.info("Result is either null or canvasContext is disposed", String.valueOf(result));
-        }
+        queueEventInternal(KEY_MAP_COLOR_BAR_OPTIONS, MAP_COLOR_BAR_OPTIONS_CHANGE, result);
     }
 
     private void queueSizingObjectsChangeEvent(Map<String, DynamicSizeContribution> result) {
-        if (result != null && !canvasContext.isDisposed()) {
-            canvasContext.getDefaultHintContext().setHint(KEY_MAP_SIZING_OBJECTS, result);
-            canvasContext.getEventQueue().queueEvent(new CommandEvent(canvasContext, System.currentTimeMillis(), MAP_SIZING_OBJECTS_CHANGE));
-        } else {
-            LOGGER.info("Result is either null or canvasContext is disposed", String.valueOf(result));
-        }
+        queueEventInternal(KEY_MAP_SIZING_OBJECTS, MAP_SIZING_OBJECTS_CHANGE, result);
     }
     
     private void queueSizeBarOptionsChangeEvent(SizeBarOptions result) {
+        queueEventInternal(KEY_MAP_SIZE_BAR_OPTIONS, MAP_SIZE_BAR_OPTIONS_CHANGE, result);
+    }
+
+    private void queueEventInternal(Key key, Command command, Object result) {
         if (result != null && !canvasContext.isDisposed()) {
-            canvasContext.getDefaultHintContext().setHint(KEY_MAP_SIZE_BAR_OPTIONS, result);
-            canvasContext.getEventQueue().queueEvent(new CommandEvent(canvasContext, System.currentTimeMillis(), MAP_SIZE_BAR_OPTIONS_CHANGE));
+            canvasContext.getThreadAccess().asyncExec(() -> {
+                canvasContext.getDefaultHintContext().setHint(key, result);
+                canvasContext.getEventQueue().queueEvent(new CommandEvent(canvasContext, System.currentTimeMillis(), command));
+            });
         } else {
             LOGGER.info("Result is either null or canvasContext is disposed", String.valueOf(result));
         }
     }
-    
+
     private static class DrawMapEnabledRequest extends UnaryRead<Resource, Boolean> {
 
         public DrawMapEnabledRequest(Resource diagram) {
@@ -309,9 +300,13 @@ public class DistrictDiagramViewer extends DiagramViewer {
             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
             Resource model = graph.syncRequest(new IndexRoot(parameter));
             Resource vf = DistrictNetworkUtil.getVisualisationFolder(graph, model);
-            Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
-            if (activeVisualisation != null) {
-                return DistrictNetworkUtil.colorBarOptions(graph, activeVisualisation);
+            if (vf != null) {
+                Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
+                if (activeVisualisation != null) {
+                    return DistrictNetworkUtil.colorBarOptions(graph, activeVisualisation);
+                }
+            } else {
+                LOGGER.debug("No visualisation folder available for model {}", model);
             }
             return ColorBarOptions.useDefault();
         }
@@ -328,9 +323,13 @@ public class DistrictDiagramViewer extends DiagramViewer {
             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
             Resource model = graph.syncRequest(new IndexRoot(parameter));
             Resource vf = DistrictNetworkUtil.getVisualisationFolder(graph, model);
-            Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
-            if (activeVisualisation != null) {
-                return DistrictNetworkUtil.colorContributions(graph, activeVisualisation);
+            if (vf != null) {
+                Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
+                if (activeVisualisation != null) {
+                    return DistrictNetworkUtil.colorContributions(graph, activeVisualisation);
+                }
+            } else {
+                LOGGER.debug("No visualisation folder available for model {}", model);
             }
             return Collections.emptyMap();
         }
@@ -403,9 +402,13 @@ public class DistrictDiagramViewer extends DiagramViewer {
             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
             Resource model = graph.syncRequest(new IndexRoot(parameter));
             Resource vf = DistrictNetworkUtil.getVisualisationFolder(graph, model);
-            Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
-            if (activeVisualisation != null) {
-                return DistrictNetworkUtil.sizeBarOptions(graph, activeVisualisation);
+            if (vf != null) {
+                Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
+                if (activeVisualisation != null) {
+                    return DistrictNetworkUtil.sizeBarOptions(graph, activeVisualisation);
+                }
+            } else {
+                LOGGER.debug("No visualisation folder available for model {}", model);
             }
             return SizeBarOptions.useDefault();
         }
@@ -450,9 +453,13 @@ public class DistrictDiagramViewer extends DiagramViewer {
             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
             Resource model = graph.syncRequest(new IndexRoot(parameter));
             Resource vf = DistrictNetworkUtil.getVisualisationFolder(graph, model);
-            Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
-            if (activeVisualisation != null) {
-                return DistrictNetworkUtil.sizeContributions(graph, activeVisualisation);
+            if (vf != null) {
+                Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
+                if (activeVisualisation != null) {
+                    return DistrictNetworkUtil.sizeContributions(graph, activeVisualisation);
+                }
+            } else {
+                LOGGER.debug("No visualisation folder available for model {}", model);
             }
             return Collections.emptyMap();
         }