[APM] Service maps layout enhancements (#76481)

* Fixes storybook anomaly score generation and better utilizes available screen space

* Closes #71770 for APM service maps by replacing breadthfirst layout with
one from the cytoscape-dagre extension. Also replaces the taxi edges
with cubic bezier edges. Finally, this adds the ability to drag
individual nodes around the service map.

* Removes unused code

* removes commented line of code

* - Adds ability for scripts/notice.js to check files with the .tsx file extension
- Adds attribution for `applyCubicBezierStyles`

* Refine comment text and MIT license url

Author: ogupte

NOTICE.txt

@@ -281,6 +281,13 @@ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
+---
+This product includes code in the function applyCubicBezierStyles that was
+inspired by a public Codepen, which was available under a "MIT" license.
+
+Copyright (c) 2020 by Guillaume (https://codepen.io/guillaumethomas/pen/xxbbBKO)
+MIT License http://www.opensource.org/licenses/mit-license
+
 ---
 This product includes code that is adapted from mapbox-gl-js, which is
 available under a "BSD-3-Clause" license.

src/dev/notice/generate_notice_from_source.ts

@@ -41,7 +41,7 @@ interface Options {
  * into the repository.
  */
 export async function generateNoticeFromSource({ productName, directory, log }: Options) {
-  const globs = ['**/*.{js,less,css,ts}'];
+  const globs = ['**/*.{js,less,css,ts,tsx}'];
 
   const options = {
     cwd: directory,

x-pack/package.json

@@ -305,6 +305,7 @@
     "concat-stream": "1.6.2",
     "content-disposition": "0.5.3",
     "cytoscape": "^3.10.0",
+    "cytoscape-dagre": "^2.2.2",
     "d3-array": "1.2.4",
     "dedent": "^0.7.0",
     "del": "^5.1.0",

x-pack/plugins/apm/public/components/app/ServiceMap/Cytoscape.tsx

@@ -13,6 +13,7 @@ import React, {
   useState,
 } from 'react';
 import cytoscape from 'cytoscape';
+import dagre from 'cytoscape-dagre';
 import { debounce } from 'lodash';
 import { useTheme } from '../../../hooks/useTheme';
 import {
@@ -22,6 +23,8 @@ import {
 } from './cytoscapeOptions';
 import { useUiTracker } from '../../../../../observability/public';
 
+cytoscape.use(dagre);
+
 export const CytoscapeContext = createContext<cytoscape.Core | undefined>(
   undefined
 );
@@ -30,7 +33,6 @@ interface CytoscapeProps {
   children?: ReactNode;
   elements: cytoscape.ElementDefinition[];
   height: number;
-  width: number;
   serviceName?: string;
   style?: CSSProperties;
 }
@@ -57,59 +59,52 @@ function useCytoscape(options: cytoscape.CytoscapeOptions) {
   return [ref, cy] as [React.MutableRefObject<any>, cytoscape.Core | undefined];
 }
 
-function rotatePoint(
-  { x, y }: { x: number; y: number },
-  degreesRotated: number
-) {
-  const radiansPerDegree = Math.PI / 180;
-  const θ = radiansPerDegree * degreesRotated;
-  const cosθ = Math.cos(θ);
-  const sinθ = Math.sin(θ);
-  return {
-    x: x * cosθ - y * sinθ,
-    y: x * sinθ + y * cosθ,
-  };
-}
-
-function getLayoutOptions(
-  selectedRoots: string[],
-  height: number,
-  width: number,
-  nodeHeight: number
-): cytoscape.LayoutOptions {
+function getLayoutOptions(nodeHeight: number): cytoscape.LayoutOptions {
   return {
-    name: 'breadthfirst',
-    // @ts-ignore DefinitelyTyped is incorrect here. Roots can be an Array
-    roots: selectedRoots.length ? selectedRoots : undefined,
+    name: 'dagre',
     fit: true,
     padding: nodeHeight,
     spacingFactor: 1.2,
     // @ts-ignore
-    // Rotate nodes counter-clockwise to transform layout from top→bottom to left→right.
-    // The extra 5° achieves the effect of separating overlapping taxi-styled edges.
-    transform: (node: any, pos: cytoscape.Position) => rotatePoint(pos, -95),
-    // swap width/height of boundingBox to compensate for the rotation
-    boundingBox: { x1: 0, y1: 0, w: height, h: width },
+    nodeSep: nodeHeight,
+    edgeSep: 32,
+    rankSep: 128,
+    rankDir: 'LR',
+    ranker: 'network-simplex',
   };
 }
 
-function selectRoots(cy: cytoscape.Core): string[] {
-  const bfs = cy.elements().bfs({
-    roots: cy.elements().leaves(),
+/*
+ * @notice
+ * This product includes code in the function applyCubicBezierStyles that was
+ * inspired by a public Codepen, which was available under a "MIT" license.
+ *
+ * Copyright (c) 2020 by Guillaume (https://codepen.io/guillaumethomas/pen/xxbbBKO)
+ * MIT License http://www.opensource.org/licenses/mit-license
+ */
+function applyCubicBezierStyles(edges: cytoscape.EdgeCollection) {
+  edges.forEach((edge) => {
+    const { x: x0, y: y0 } = edge.source().position();
+    const { x: x1, y: y1 } = edge.target().position();
+    const x = x1 - x0;
+    const y = y1 - y0;
+    const z = Math.sqrt(x * x + y * y);
+    const costheta = z === 0 ? 0 : x / z;
+    const alpha = 0.25;
+    // Two values for control-point-distances represent a pair symmetric quadratic
+    // bezier curves joined in the middle as a seamless cubic bezier curve:
+    edge.style('control-point-distances', [
+      -alpha * y * costheta,
+      alpha * y * costheta,
+    ]);
+    edge.style('control-point-weights', [alpha, 1 - alpha]);
   });
-  const furthestNodeFromLeaves = bfs.path.last();
-  return cy
-    .elements()
-    .roots()
-    .union(furthestNodeFromLeaves)
-    .map((el) => el.id());
 }
 
 export function Cytoscape({
   children,
   elements,
   height,
-  width,
   serviceName,
   style,
 }: CytoscapeProps) {
@@ -151,13 +146,7 @@ export function Cytoscape({
         } else {
           resetConnectedEdgeStyle();
         }
-
-        const selectedRoots = selectRoots(event.cy);
-        const layout = cy.layout(
-          getLayoutOptions(selectedRoots, height, width, nodeHeight)
-        );
-
-        layout.run();
+        cy.layout(getLayoutOptions(nodeHeight)).run();
       }
     };
     let layoutstopDelayTimeout: NodeJS.Timeout;
@@ -180,6 +169,7 @@ export function Cytoscape({
           event.cy.fit(undefined, nodeHeight);
         }
       }, 0);
+      applyCubicBezierStyles(event.cy.edges());
     };
     // debounce hover tracking so it doesn't spam telemetry with redundant events
     const trackNodeEdgeHover = debounce(
@@ -211,6 +201,9 @@ export function Cytoscape({
         console.debug('cytoscape:', event);
       }
     };
+    const dragHandler: cytoscape.EventHandler = (event) => {
+      applyCubicBezierStyles(event.target.connectedEdges());
+    };
 
     if (cy) {
       cy.on('data layoutstop select unselect', debugHandler);
@@ -220,6 +213,7 @@ export function Cytoscape({
       cy.on('mouseout', 'edge, node', mouseoutHandler);
       cy.on('select', 'node', selectHandler);
       cy.on('unselect', 'node', unselectHandler);
+      cy.on('drag', 'node', dragHandler);
 
       cy.remove(cy.elements());
       cy.add(elements);
@@ -239,19 +233,11 @@ export function Cytoscape({
         cy.removeListener('mouseout', 'edge, node', mouseoutHandler);
         cy.removeListener('select', 'node', selectHandler);
         cy.removeListener('unselect', 'node', unselectHandler);
+        cy.removeListener('drag', 'node', dragHandler);
       }
       clearTimeout(layoutstopDelayTimeout);
     };
-  }, [
-    cy,
-    elements,
-    height,
-    serviceName,
-    trackApmEvent,
-    width,
-    nodeHeight,
-    theme,
-  ]);
+  }, [cy, elements, height, serviceName, trackApmEvent, nodeHeight, theme]);
 
   return (
     <CytoscapeContext.Provider value={cy}>

x-pack/plugins/apm/public/components/app/ServiceMap/Popover/index.tsx

@@ -71,13 +71,15 @@ export function Popover({ focusedServiceName }: PopoverProps) {
       cy.on('select', 'node', selectHandler);
       cy.on('unselect', 'node', deselect);
       cy.on('data viewport', deselect);
+      cy.on('drag', 'node', deselect);
     }
 
     return () => {
       if (cy) {
         cy.removeListener('select', 'node', selectHandler);
         cy.removeListener('unselect', 'node', deselect);
         cy.removeListener('data viewport', undefined, deselect);
+        cy.removeListener('drag', 'node', deselect);
       }
     };
   }, [cy, deselect]);

x-pack/plugins/apm/public/components/app/ServiceMap/__stories__/Cytoscape.stories.tsx

@@ -49,13 +49,11 @@ storiesOf('app/ServiceMap/Cytoscape', module)
         },
       ];
       const height = 300;
-      const width = 1340;
       const serviceName = 'opbeans-python';
       return (
         <Cytoscape
           elements={elements}
           height={height}
-          width={width}
           serviceName={serviceName}
         />
       );
@@ -330,7 +328,7 @@ storiesOf('app/ServiceMap/Cytoscape', module)
           },
         },
       ];
-      return <Cytoscape elements={elements} height={600} width={1340} />;
+      return <Cytoscape elements={elements} height={600} />;
     },
     {
       info: { propTables: false, source: false },

x-pack/plugins/apm/public/components/app/ServiceMap/__stories__/CytoscapeExampleData.stories.tsx

@@ -35,6 +35,8 @@ function setSessionJson(json: string) {
   window.sessionStorage.setItem(SESSION_STORAGE_KEY, json);
 }
 
+const getCytoscapeHeight = () => window.innerHeight - 300;
+
 storiesOf(STORYBOOK_PATH, module)
   .addDecorator((storyFn) => <EuiThemeProvider>{storyFn()}</EuiThemeProvider>)
   .add(
@@ -43,16 +45,17 @@ storiesOf(STORYBOOK_PATH, module)
       const [size, setSize] = useState<number>(10);
       const [json, setJson] = useState<string>('');
       const [elements, setElements] = useState<any[]>(
-        generateServiceMapElements(size)
+        generateServiceMapElements({ size, hasAnomalies: true })
       );
-
       return (
         <div>
           <EuiFlexGroup>
             <EuiFlexItem>
               <EuiButton
                 onClick={() => {
-                  setElements(generateServiceMapElements(size));
+                  setElements(
+                    generateServiceMapElements({ size, hasAnomalies: true })
+                  );
                   setJson('');
                 }}
               >
@@ -79,7 +82,7 @@ storiesOf(STORYBOOK_PATH, module)
             </EuiFlexItem>
           </EuiFlexGroup>
 
-          <Cytoscape elements={elements} height={600} width={1340} />
+          <Cytoscape elements={elements} height={getCytoscapeHeight()} />
 
           {json && (
             <EuiCodeEditor
@@ -121,7 +124,7 @@ storiesOf(STORYBOOK_PATH, module)
 
       return (
         <div>
-          <Cytoscape elements={elements} height={600} width={1340} />
+          <Cytoscape elements={elements} height={getCytoscapeHeight()} />
           <EuiForm isInvalid={error !== undefined} error={error}>
             <EuiFlexGroup>
               <EuiFlexItem>
@@ -204,8 +207,7 @@ storiesOf(STORYBOOK_PATH, module)
         <div>
           <Cytoscape
             elements={exampleResponseTodo.elements}
-            height={600}
-            width={1340}
+            height={getCytoscapeHeight()}
           />
         </div>
       );
@@ -224,8 +226,7 @@ storiesOf(STORYBOOK_PATH, module)
         <div>
           <Cytoscape
             elements={exampleResponseOpbeansBeats.elements}
-            height={600}
-            width={1340}
+            height={getCytoscapeHeight()}
           />
         </div>
       );
@@ -244,8 +245,7 @@ storiesOf(STORYBOOK_PATH, module)
         <div>
           <Cytoscape
             elements={exampleResponseHipsterStore.elements}
-            height={600}
-            width={1340}
+            height={getCytoscapeHeight()}
           />
         </div>
       );
@@ -264,8 +264,7 @@ storiesOf(STORYBOOK_PATH, module)
         <div>
           <Cytoscape
             elements={exampleResponseOneDomainManyIPs.elements}
-            height={600}
-            width={1340}
+            height={getCytoscapeHeight()}
           />
         </div>
       );

x-pack/plugins/apm/public/components/app/ServiceMap/__stories__/generate_service_map_elements.ts

@@ -4,9 +4,13 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import { getSeverity } from '../Popover/getSeverity';
-
-export function generateServiceMapElements(size: number): any[] {
+export function generateServiceMapElements({
+  size,
+  hasAnomalies,
+}: {
+  size: number;
+  hasAnomalies: boolean;
+}): any[] {
   const services = range(size).map((i) => {
     const name = getName();
     const anomalyScore = randn(101);
@@ -15,11 +19,14 @@ export function generateServiceMapElements(size: number): any[] {
       'service.environment': 'production',
       'service.name': name,
       'agent.name': getAgentName(),
-      anomaly_score: anomalyScore,
-      anomaly_severity: getSeverity(anomalyScore),
-      actual_value: Math.random() * 2000000,
-      typical_value: Math.random() * 1000000,
-      ml_job_id: `${name}-request-high_mean_response_time`,
+      serviceAnomalyStats: hasAnomalies
+        ? {
+            transactionType: 'request',
+            anomalyScore,
+            actualValue: Math.random() * 2000000,
+            jobId: `${name}-request-high_mean_response_time`,
+          }
+        : undefined,
     };
   });
 
@@ -146,7 +153,7 @@ const NAMES = [
   'leech',
   'loki',
   'longshot',
-  'lumpkin,',
+  'lumpkin',
   'madame-web',
   'magician',
   'magneto',