Flowable process custom attribute

I wrote before about adding custom extension attributes to nodes , But how to extend custom attributes on the process ？ In fact, it is consistent with adding custom attributes to nodes , Only the modified related classes are different .

edit stencilset_bpmn.json file

find stencilset_bpmn.json file , Open it and you will find propertyPackages Properties of , Pictured ：

We just need to follow the form created before the process , I define it here as follows ：

{
    
      "name": "isbatchapproval_package",
      "properties": [
        {
    
          "id": "isbatchapproval",
          "type": "Boolean",  // Set to boolean type 
          "title": " Allow batch approval ",
          "value": "",
          "description": " Set whether batch approval is allowed for related nodes ",
          "popular": true
        }
      ]
    }

After writing , To display related attributes on related nodes , You need to reference the above attributes on the process id The value is isbatchapproval Of , We need to introduce ：

{
    
      "type": "node",
      "id": "BPMNDiagram",
      "title": "BPMN\u56fe\u8868",
      "description": "A BPMN 2.0 diagram.",
      "view": "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<svg\n xmlns=\"http://www.w3.org/2000/svg\"\n xmlns:svg=\"http://www.w3.org/2000/svg\"\n xmlns:oryx=\"http://www.b3mn.org/oryx\"\n xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n width=\"800\"\n height=\"600\"\n version=\"1.0\">\n <defs></defs>\n <g pointer-events=\"fill\" >\n <polygon stroke=\"black\" fill=\"black\" stroke-width=\"1\" points=\"0,0 0,590 9,599 799,599 799,9 790,0\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\" stroke-miterlimit=\"10\" />\n <rect id=\"diagramcanvas\" oryx:resize=\"vertical horizontal\" x=\"0\" y=\"0\" width=\"790\" height=\"590\" stroke=\"black\" stroke-width=\"2\" fill=\"white\" />\n \t<text font-size=\"22\" id=\"diagramtext\" x=\"400\" y=\"25\" oryx:align=\"top center\" stroke=\"#373e48\"></text>\n </g>\n</svg>",
      "icon": "diagram.png",
      "groups": [
        " The illustration "
      ],
      "mayBeRoot": true,
      "hide": true,
      "propertyPackages": [
        "process_idpackage",
        "namepackage",
        "documentationpackage",
        "process_authorpackage",
        "process_versionpackage",
        "process_namespacepackage",
        "process_historylevelpackage",
        "isexecutablepackage",
        "datapropertiespackage",
        "executionlistenerspackage",
        "eventlistenerspackage",
        "signaldefinitionspackage",
        "messagedefinitionspackage",
        "process_potentialstarteruserpackage",
        "process_potentialstartergrouppackage",
        "process_iseagerexecutionfetchpackage",
        "isbatchapproval_package"
      ],
      "hiddenPropertyPackages": [],
      "roles": []
    }

After adding, there will be a selection box above the attributes of the process .

In download BPMN.xml Add attributes in

We know that when used on nodes , Need to expand UserTaskJsonConverter, But what classes should the process extend ？ Through previous experience , We know that the process expansion is in BaseBpmnJsonConverter.java and BpmnJsonConverter.

edit BaseBpmnJsonConverter.java

find if (baseElement instanceof FlowElement) Change to the following code ：PROCESS_IS_BATCHAPPROVAL_KEY = “isbatchapproval”;

if (baseElement instanceof FlowElement) {
    
            FlowElement flowElement = (FlowElement) baseElement;
            if (StringUtils.isNotEmpty(flowElement.getName())) {
    
                propertiesNode.put(PROPERTY_NAME, flowElement.getName());
            }

            if (StringUtils.isNotEmpty(flowElement.getDocumentation())) {
    
                propertiesNode.put(PROPERTY_DOCUMENTATION, flowElement.getDocumentation());
            }

            Map<String, List<ExtensionElement>> extensionElements = flowElement.getExtensionElements();
            List<ExtensionElement> elements = extensionElements.get(PROCESS_IS_BATCHAPPROVAL_KEY);
            if (CollectionUtils.isNotEmpty(elements)) {
    
                for (ExtensionElement extensionElement : elements) {
    
                    if (extensionElement.getName().equals(PROCESS_IS_BATCHAPPROVAL_KEY)) {
    
                        propertiesNode.put(PROCESS_IS_BATCHAPPROVAL_KEY, extensionElement.getElementText());
                    }
                }
            }
            BpmnJsonConverterUtil.convertListenersToJson(((FlowElement) baseElement).getExecutionListeners(), true, propertiesNode);
        }

edit BpmnJsonConverter.java

find if (!nonEmptyPoolFound) Add as the following code ：

 String isbatchapproval = BpmnJsonConverterUtil.getPropertyValueAsString("isbatchapproval", modelNode);
            if (StringUtils.isNotEmpty(isbatchapproval)) {
    
                ExtensionElement isbatchapprovalExtensionElement = new ExtensionElement();
                isbatchapprovalExtensionElement.setName("isbatchapproval");
                isbatchapprovalExtensionElement.setNamespace("http://flowable.org/bpmn");
                isbatchapprovalExtensionElement.setNamespacePrefix("flowable");
                isbatchapprovalExtensionElement.setElementText(isbatchapproval);
                process.addExtensionElement(isbatchapprovalExtensionElement);
            }

Then start the project , downloaded xml There will be custom attributes on the process , Pictured ：

Be careful

1. If it is source code deployment , Just modify the source code
2. If it is the introduction of jar When , Need to override BaseBpmnJsonConverter.java and BpmnJsonConverter.java, In the project , Create the same package as the package in the source class , Assign notes in the source code , Pay attention to the imported version and the edited version , Don't get it wrong ！