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bpmn-visualization add-ons

bv-experimental-add-ons offers new functionalities to bpmn-visualization in the form of add-ons.

📌 Usage

Install bv-experimental-add-ons and bpmn-visualization:

npm i @process-analytics/bv-experimental-add-ons bpmn-visualization

📜 TypeScript Support

The @process-analytics/bv-experimental-add-ons npm package includes type definitions, so the integration works out of the box in TypeScript projects and applications. bv-experimental-add-ons requires TypeScript 4.5 or greater.

🎨 Features

Plugins

The plugins infrastructure provides a way to register extension points.

Important

To be able to register and use the plugins, you need to import BpmnVisualization from the addons package, and not from bpmn-visualization.

- import {BpmnVisualization} from "bpmn-visualization";
+ import {BpmnVisualization} from "@process-analytics/bv-experimental-add-ons";

Example of use:

import {BpmnVisualization} from "@process-analytics/bv-experimental-add-ons";

const bpmnVisualization = new BpmnVisualization({
    container: 'bpmn-container',
    plugins: [MyPlugin]
});
// Retrieve the plugin by id. The id is defined in the plugin implementation
const myPlugin = bpmnVisualization.getPlugin<MyPlugin>('my-plugin');
myPlugin.aMethod();

Available plugins

  • Plugins providing BpmnElementsRegistry methods divided into different categories. This is how bpmn-visualization will provide these functionalities in the future, in order to better separate responsibilities and improve tree-shaking :
    • CssClassesPlugin: all methods for manipulating the CSS classes of BPMN elements.
    • ElementsPlugin: all methods for retrieving BpmnElement and BpmnSemantic objects.
    • OverlaysPlugin:
      • provides all BpmnElementsRegistry methods relating to overlays.
      • ADDITION: let show/hide overlays created with BpmnElementsRegistry.addOverlays.
    • StylePlugin: all methods for manipulating the style of BPMN elements.
  • StyleByNamePlugin: provides all BpmnElementsRegistry methods for manipulating the style of BPMN elements, identifying the BPMN elements by name.

Writing a custom plugin

A plugin is defined as a class:

  • It must implement the Plugin interface.
  • Its constructor must satisfy the PluginConstructor type.
  • It can implement the configure method to configure the plugin after construction.
  • It can provide new methods to extend existing API or introduce new behavior .

BpmnElementsIdentifier

Convenient tools to know the type/kind of BPMN elements.

BpmnElementsSearcher

bpmn-visualization only provides APIs that take BPMN element ids as parameters. However, there are scenario where the ids in the BPMN source/model have been generated and are unknown by the application.

Instead, the application knows the name of the elements. BpmnElementsSearcher provides a way to retrieve elements given their names.

This is useful for example in "Process Discovery" scenario. The elements are identified by name only. Ids may be generated and not fully linked with the name of the elements.

IMPORTANT: There is no guarantee that names are unique in the BPMN source. In case that there are several matches, BpmnElementsSearcher may do filtering (see below).

Retrieving ids

Once you get the ids of elements related to their names, you can then call regular bpmn-visualization API by passing the resulting ids.

Limitations

  • If there are several matching names, BpmnElementsSearcher returns the first matching identifier.

Retrieving the whole BpmnSemantic

BpmnElementsSearcher also provides a method to retrieve the whole BpmnSemantic objects.

In this case, it allows to provide ways to choose the elements if there are several matches for a given name. See DeduplicateNamesOptions for more details.

Available implementations for Path Resolution

WARNING: this is front-end processing. It's more efficient for this type of processing to be carried out in the backend. Use it to bypass the limitations of the tools and algorithms provided in the backend.

The Path Resolution infers a BPMN path from elements known to be completed or pending.

PathResolver

As it is generic and covers general use cases, its capabilities are limited.

It only infers edges/flows given a list of flowNode/shape ids.

CasePathResolver

Provides path resolution for a single process instance/case.

It is an enhanced implementation of PathResolver with resolution options and returns categorized BpmnSemantic objects.

ShapeUtil

Add new methods to the ShapeUtil class provided by bpmn-visualization.

📃 License

bv-experimental-add-ons is released under the Apache 2.0 license.
Copyright © 2023-present, Bonitasoft S.A.