In this tutorial:

Introduction

For users with DTP and Extension Designer 5.3.2, you can create a flow using an endpoint node and the component and parameter nodes located in the Extension Designer library. Widget definitions are embedded into the component and parameter nodes, and the endpoint node can choose which widgets to create. To import component and parameter nodes, choose Import> Library> Components or Parameters> <node> from the Extension Designer menu.

The endpoint node provides data for the widget so that Extension Designer can provide a full definition of the widget and the data. This enables a smooth user experience when viewing the data in a dashboard because you don't have to remember specific endpoints or settings. 

See Working with Nodes for additional information about these and other nodes.

Configuring Component Nodes

Components store a custom widget and report's structure and definition. It consists of three definition parts:

• HTML Template 
• Javascript Controller
• CSS Style

HTML Template

The HTML Template defines how the component should look inside of the dashboard or custom report. It defines what properties that Javascript Controller should have under the $scope object.

JavaScript Controller

The JavaScript Controller implements how to represent the chart according to the HTML Template. It controls the color of the chart and the drill-down operation.

CSS Style

This tab defines the CSS styling unique to the component. We highly recommend providing unique prefixes if you want to customize the CSS, otherwise, the style definitions may conflict with other widgets in same the dashboard.

Configuring Parameter Nodes

Parameters define what options the widget can include under the Add Widget page. Parameters a Parameters tab and a Labels tab. 

Parameters Tab

This tab defines list of parameters and its data source. Some parameters can also link the dependencies so that filters, such as the build ID, can be set.

Labels Tab

This tab defines how the parameter label is presented in the Add or Edit Widget page.

Parameters are tightly defined under the DTP dashboard. You can use a combination of known parameters, such as filters, periods, or baseline/target build, but you can only define text box parameters as needed. Some parameter nodes defined the Marketplace artifacts have a profile parameter definition (see Working with Model Profiles).

Pre-built Components and Parameters

Out of the box, Parasoft provides useful component and parameter definitions for creating your own custom widgets:

The same set of parameters are defined per widget and report. This is because a different set of parameters are required for the drill down report.

Each component node is configured to take a specific payload to render the chart. All definitions are provided under Import> Library> Sample Widgets. Import an example widget and review the Sample Data node for details.

Every time you deploy a widget or a report flow, you must perform a full refresh of the dashboard browser to see the update. The component and parameter definitions are only updated when the dashboard is loaded. Refreshing the widget only won't reflect the changes to the component and parameters. However, if you are working on a data flow, you can refresh only the widget to see the changes.

Creating new Pie Chart widget

This section explains how to create new chart widget in DTP using the Pie chart sample widget. 

1. Choose Import> Library> Sample Widgets> Pie Chart example from the Extension Designer menu to import the example to a new flow tab in any service.

2. Double-click the Example Pie Chart endpoint node and review the configuration. This node defines the widget implementation. 
    
   You can change the following fields to configure the example widget:

   Name	Name of the widget displayed in the DTP dashboard
   UUID	Unique identifier for the endpoint that is automatically generated when you drop the endpoint node into the flow canvas. If you want to regenerate UUID, delete the value and click Done. A new UUID will be regenerated when the flow is saved.
   Type	Choose an endpoint type from the Type drop-down menu: Widget: Specifies a DTP dashboard widget. Once this value is selected, the size, category, component, and parameter fields will be available. See About the Dashboard Grid for additional information about sizing widgets. Report: Specifies a custom report for the DTP dashboard. Once this value is selected, the component and parameter fields will be available Practice: Specifies a Policy Center practice (see Defining Policies). Once this value is selected, the component and parameter fields will be available. General: Specifies a general REST endpoint. Both GET and POST operations will be available for the endpoint. To get the endpoint URL, open the Service Category Page and copy the URL.
   Category	Defines the DTP dashboard widget category. In general, the value should be either "custom" or "process intelligence". You can enter a new name to create a new category. The widget header color will be gray if you create your own category name.
   Component:	Specifies the component to provide. Any components deployed to the flow canvas should be available from the drop-down menu.
   Parameter	Specifies the set of parameters to provide to the DTP dashboard. All parameters deployed to the flow canvas should be available from the drop-down menu.
   Description	Specifies a description of the endpoint. This description will be used on DTP dashboards, the Add Widget page (see Adding Widgets), and the Extension Designer's category page as the endpoint description.

3. Deploy the widget.
4. Drop a new Endpoint node into the flow and configure it according the following image:
   
5. Link new "My Own Widget" Endpoint node with "Sample Data" function node.
    
6. Deploy the flow.
7. In Report Center, refresh the dashboard (if already open) and click Add Widget. The Add Widget overlay will display your widget on its own category.
   
8. Finish adding the widget to see it on the dashboard
   

About the Endpoint Output Link

The Endpoint output node links to the data source for the widget. You should use the http response node in output category as the output.

Widget Error Messages

The nodes provide a structured msg.payload as the output to the endpoint. The DTP dashboard will use the response as data for the widget. In every sample widget, we provide a Sample Data function node (with actual data) and a No Data function node for possible payload schema. The No Data node demonstrate how to send an error message back to the widget so the widget can display the message properly.

If you delete the endpoint after adding the widget to the dashboard, DTP will detect that the widget definition is no longer available and show following message:

Restoring the endpoint node back (with same UUID), and refresh the dashboard, you will see your widget back.

Configuring Error Messages

Error messages use the following Standard Error Object format, which applies to widgets and any flows that communicate with it.

msg.payload = {
    error: {
        title: "error message title",
       message: "detailed error message"
    }
} 

If this error object returns to a custom widget or report, it should add following to msg object:

msg.statusCode = 400;

Creating a Custom Pie Report

The report concept is the same as the widget, but the report endpoint type doesn't have size limitations and can accommodate much more information. You should be able to mix one or more components into a single "Report" component to draw more complicated reports.

All components are optimized for the widgets and in this tutorials. We will explain how to add a new component for report and create a custom report using Pie Chart.

To create new custom report, we need to add additional parts to the service:

1. Import a new "Build Delta - Report" Parameter node from Import> Library> Parameters> Build Delta - Report. This parameter node is not used, but you will see the difference in the content.
2. Copy the Pie Chart component node (Ctrl/Command + c) and paste it (Ctrl/Command + v) to the flow canvas. Rename the node to "Pie Chart Component for Report".
3. Copy and paste the My own Widget endpoint node and rename to "My Own Report."
4. Copy and paste the Sample Data node so that there is a "Sample Data" node for both "My Own Widget" and "My Own Report"
   
5. Double-click the My Own Report node and choose Pie Chart Component for Report from the Component drop-down menu. 
6. Choose Build Delta - Report from the Parameter drop-down menu.
   
7. Copy the endpoint node's UUID, which is part of the URL for the report:
   
   <DTP URL>/grs/dtp/dashboards/reports/<Report Endpoint UUID>.
   
   You can use this URL into your drill-down report.
8. Double-click the Sample Data node linked to "My Own Widget" and update the drilldownUrl for the SOAtest category with the endpoint URL.
   

When a user clicks on the SOAtest section of Pie Chart, it will drill down to your own custom report. If necessary, you can your own parameter list into this URL. If you test the report at this point, it will throw an "Controller" exception because some parts of component are designed for the widget. We can fix this issue easily:

1. Double-click the Pie Chart Component node for the report.
2. Click JavaScript Controller tab
   The source of the error occurs at line 23: 
   $scope.options.legend
   The component is looking for widget size. The logic from the widget is to add a legend if the X-axis size is larger than the Y-axis. Since this is a report, it can show a legend without any space limitation. 
3. Change line 23 to legend:
   { visible: true}
4. Click Done and Deploy.

Your simple custom report looks like following:

You can add additional information to the "Pie Chart Component for Report." For more advanced custom reports, review the endpoints from the Change Based Testing, DTP File Based Licensing Report, Modified Coverage or Test Failures by Build artifacts.