Fix statistics for tiles that fail processing

CHANGES.md

@@ -20,6 +20,7 @@ Change Log
 
 ##### Fixes :wrench:
 * Fixed a bug causing custom TilingScheme classes to not be able to use a GeographicProjection. [#6524](https://github.com/AnalyticalGraphicsInc/cesium/pull/6524)
+* Fixed incorrect 3D Tiles statistics when a tile fails during processing. [#6558](https://github.com/AnalyticalGraphicsInc/cesium/pull/6558)
 * Fixed race condition causing intermittent crash when changing geometry show value [#3061](https://github.com/AnalyticalGraphicsInc/cesium/issues/3061)
 * `ProviderViewModel`s with no category are displayed in an untitled group in `BaseLayerPicker` instead of being labeled as `'Other'` [#6574](https://github.com/AnalyticalGraphicsInc/cesium/pull/6574)
 

Source/Scene/Cesium3DTileset.js

@@ -1435,25 +1435,8 @@ define([
 
         ++statistics.numberOfPendingRequests;
 
-        var removeFunction = removeFromProcessingQueue(tileset, tile);
         tile.contentReadyToProcessPromise.then(addToProcessingQueue(tileset, tile));
-        tile.contentReadyPromise.then(function() {
-            removeFunction();
-            tileset.tileLoad.raiseEvent(tile);
-        }).otherwise(function(error) {
-            removeFunction();
-            var url = tile._contentResource.url;
-            var message = defined(error.message) ? error.message : error.toString();
-            if (tileset.tileFailed.numberOfListeners > 0) {
-                tileset.tileFailed.raiseEvent({
-                    url : url,
-                    message : message
-                });
-            } else {
-                console.log('A 3D tile failed to load: ' + url);
-                console.log('Error: ' + message);
-            }
-        });
+        tile.contentReadyPromise.then(handleTileSuccess(tileset, tile)).otherwise(handleTileFailure(tileset, tile));
     }
 
     function requestTiles(tileset, outOfCore) {
@@ -1476,15 +1459,32 @@ define([
         };
     }
 
-    function removeFromProcessingQueue(tileset, tile) {
-        return function() {
-            if (tile._contentState === Cesium3DTileContentState.FAILED) {
-                // Not in processing queue
-                // For example, when a url request fails and the ready promise is rejected
+    function handleTileFailure(tileset, tile) {
+        return function(error) {
+            if (tileset._processingQueue.indexOf(tile) >= 0) {
+                // Failed during processing
+                --tileset._statistics.numberOfTilesProcessing;
+            } else {
+                // Failed when making request
                 --tileset._statistics.numberOfPendingRequests;
-                return;
             }
 
+            var url = tile._contentResource.url;
+            var message = defined(error.message) ? error.message : error.toString();
+            if (tileset.tileFailed.numberOfListeners > 0) {
+                tileset.tileFailed.raiseEvent({
+                    url : url,
+                    message : message
+                });
+            } else {
+                console.log('A 3D tile failed to load: ' + url);
+                console.log('Error: ' + message);
+            }
+        };
+    }
+
+    function handleTileSuccess(tileset, tile) {
+        return function() {
             --tileset._statistics.numberOfTilesProcessing;
 
             if (tile.hasRenderableContent) {
@@ -1498,6 +1498,8 @@ define([
                     tile.replacementNode = tileset._replacementList.add(tile);
                 }
             }
+
+            tileset.tileLoad.raiseEvent(tile);
         };
     }
 

Specs/Scene/Cesium3DTilesetSpec.js

@@ -480,6 +480,38 @@ defineSuite([
                 fail('should not resolve');
             }).otherwise(function(error) {
                 expect(root._contentState).toEqual(Cesium3DTileContentState.FAILED);
+                var statistics = tileset.statistics;
+                expect(statistics.numberOfAttemptedRequests).toBe(0);
+                expect(statistics.numberOfPendingRequests).toBe(0);
+                expect(statistics.numberOfTilesProcessing).toBe(0);
+                expect(statistics.numberOfTilesWithContentReady).toBe(0);
+            });
+        });
+    });
+
+    it('handles failed tile processing', function() {
+        viewRootOnly();
+        var tileset = scene.primitives.add(new Cesium3DTileset({
+            url : tilesetUrl
+        }));
+        return tileset.readyPromise.then(function(tileset) {
+            // Start spying after the tileset json has been loaded
+            spyOn(Resource._Implementations, 'loadWithXhr').and.callFake(function(url, responseType, method, data, headers, deferred, overrideMimeType) {
+                deferred.resolve(Cesium3DTilesTester.generateBatchedTileBuffer({
+                    version : 0 // Invalid version
+                }));
+            });
+            scene.renderForSpecs(); // Request root
+            var root = tileset._root;
+            return root.contentReadyPromise.then(function() {
+                fail('should not resolve');
+            }).otherwise(function(error) {
+                expect(root._contentState).toEqual(Cesium3DTileContentState.FAILED);
+                var statistics = tileset.statistics;
+                expect(statistics.numberOfAttemptedRequests).toBe(0);
+                expect(statistics.numberOfPendingRequests).toBe(0);
+                expect(statistics.numberOfTilesProcessing).toBe(0);
+                expect(statistics.numberOfTilesWithContentReady).toBe(0);
             });
         });
     });