7 Custom Actions

Oracle Visual Builder Add-in for Excel supports custom actions defined by Oracle business object REST API services on an entire business object or on individual items (rows) from a business object.

A custom action is a function defined by the REST service that is callable by external systems using REST POST messages. A custom action may accept zero or more parameters of simple types such as a String or Integer and returns a single value to the add-in. When that value is a string or other scalar value, the add-in shows the result to the business user.

What a custom action does when invoked by the add-in is determined by the service. The add-in simply sends a POST on the collection or item path that includes the action name, such as /contextRoot/v1/myBusObj/{itemId}/action/doMyAction for a business object item.

This post can include payload field values, known as "parameters", to the service. The service then takes the passed parameters and performs the custom action. This action may act on a single row or on all rows in the business object. It might also run a query and act on a subset of the business object.

Let's look at a couple of examples of custom actions at the business object (BO) level and BO item level. For example, a REST service may have a custom action defined at the BO level such as the one described here in REST API for Oracle Project Portfolio Management Cloud. When triggered, this custom action reprocesses all the project budget versions which are showing as failed and brings these back into a working state.

Examples of custom actions at the BO item level might be a couple of custom actions, "Approve" and "Reject", that operate on the items of a expense report business object. A business user can download one or more expense reports, approve or reject each one, and then update them all in a single upload.

If a given REST API supports custom actions, they are described in the service's OpenAPI v3 service description document. The add-in can parse this service description and capture custom action settings in your workbook. No further configuration is required.

Business users perform custom actions using the buttons and menu commands from the Oracle Visual Builder ribbon tab. See Perform Custom Actions in Table and Form-over-Table Layouts in Managing Data Using Oracle Visual Builder Add-in for Excel.

Item level custom actions can be performed on items in either the form or the table of a Form-over-Table layout, as well as on rows in a Table layout. BO level custom actions can be performed on BOs in a table layout and the form in a Form-over-Table layout. They are not supported on the BO in the table of a Form-over Table layout. See Custom Action Limitations for information on other custom action limitations.

Edit Custom Actions

Custom actions exposed by the service that your workbook uses can be viewed and edited in the Custom Actions tab of the Business Object Editor.

Oracle Visual Builder Add-in for Excel populates this editor with the custom action properties as described in the service's OpenAPI v3 service description document.

Description of the illustration excel-custaction.png

In this example, the add-in shows the properties for a "Reject" custom action on an ExpenseReports business object (BO) item path (/ExpenseReports/{ExpenseReports_Id}/action/reject). The Applies to a single row check box indicates that the custom action operates at the BO item level. If this check box is unselected, the custom action operates at the BO level.

For information on the Batch Mode Enabled check box, refer to Batch Mode for Custom Actions.

Properties such as Title (which appears in the UI that the business user sees) and Description can be edited as needed in the Custom Action Editor. Other properties reflect the service configuration and should be left as is.

Payload fields can be edited on the Payload Fields tab of the Custom Action Editor. Properties such as the Title, Data Type, and Required can be changed. For example, you can change the data type of a payload field from String to Integer, as long as the change is compatible with the service. You can also update the Required property to mark the payload field as required or not:

Description of the illustration custom_action_general_prop.png

You can also use the Tooltip field to add a description of the payload field to help your users determine what information or values are expected. Users can display the tooltip in the worksheet by selecting the column header for a payload field.

You can also define a list of values for the payload field from the List of Values tab. See Configure a List of Values.

Add Custom Action Fields

If the service your workbook uses includes custom actions on individual items of a business object, you can add defined custom action payload fields to your Table layout or the table part of your Form-over-Table layout.

Let's take as an example a "reject" custom action that's exposed by an expense report business object to reject expenses.

This task assumes you have a Table layout for an expense report business object that includes a "reject" custom action. You can also add custom actions to the table of a Form-over-Table layout.

To add custom action table columns to a layout:

1. Select the layout, then click Designer from the Oracle Visual Builder tab to open the Layout Designer.
2. Click the Columns tab in the Layout Designer.
3. Click Manage Columns () to open the Table Column Manager.
4. From the Table Column Manager, click Custom Actions in the Available Fields pane.
5. In the Selected Fields pane, select the location where you want the payload field columns to be added. The columns will be inserted before the selected field.
6. In the Available Fields pane, select the payload fields you want to add.
   In this example, we'll select Reason and Notes to add these columns to the layout.
   
   

   
   Description of the illustration custom_action_columns_available_fields_selected.png

   
   
7. Click Done.

Once you add custom action fields to a layout in your integrated workbook, your business users can mark rows for the custom action by entering values in the payload field columns or by using the ribbon command. See Perform Custom Actions in Table and Form-over-Table Layouts in Managing Data Using Oracle Visual Builder Add-in for Excel.

When they click Upload Changes, Oracle Visual Builder Add-in for Excel sends their changes to the REST endpoint and invokes the custom action on the marked rows.

Service Description for Custom Actions

If a given REST API supports custom actions, they are described in the OpenAPI v3 service description document generated by the Oracle business object REST API service. For example, a reject item-level custom action would appear in the paths collection:

// Note: some JSON content has been omitted for brevity/clarity

"/ExpenseReports/{ExpenseReports_Id}/action/reject": {
    "parameters": [
      {
        "$ref": "#/components/parameters/ExpenseReports_Id"
      }
    ],
    "post": {
      "summary": "reject",
      "description": "reject",
      "operationId": "do_reject_ExpenseReports",
      "responses": {
        "default": {
          "description": "The following table describes the default response for this task.",
          "content": {
            "application/vnd.oracle.adf.actionresult+json": {
              "schema": {
                "type": "object",
                "properties": {
                  "result": {
                    "type": "string"
                  }
                },
                "required": [
                  "result"
                ],
                "additionalProperties": false
              }
            }
          }
        }
      },
      "requestBody": {
        "description": "The following table describes the body parameters in the request for this task.",
        "content": {
          "application/vnd.oracle.adf.action+json": {
            "schema": {
              "type": "object",
              "properties": {
                "rejectionReasonCode": {
                  "type": "string",
                  "nullable": true
                },
                "notes": {
                  "type": "string",
                  "nullable": true
                }
              },
              "additionalProperties": false
            }
          }
        }
      }
    }
  }

Note the following:

• For a item-level custom action, the path entry contains a path parameter for the row/item ID, for example, /ExpenseReports/{ExpenseReports_Id}/action/reject"

  In the case of a business object-level custom action, the path (such as /ExpenseReports/action/sendToAuditor) doesn't include a path parameter for the row/item.

• The end of the path entry (reject) matches the name of the custom method defined in the service (see Publishing Custom Service Methods to UI Clients)
• The presence of a POST operation for the action path entry is required
• In the requestBody schema, there are properties that match the parameters defined in the custom method signature from the service. In this document, these properties are referred to as custom action payload fields.

Batch Mode for Custom Actions

If a custom action supports batch mode, Oracle Visual Builder Add-in for Excel can process custom actions and other types of changes in batches.

Batch mode is only relevant for custom actions defined on the item path since custom actions on individual items are sent as separate requests. A custom action on an entire business object (BO) may update multiple items in the BO but is accomplished using a single request.

To enable the add-in to process changes in batches, select the Batch Mode Enabled check box in the Custom Action Editor.

If the custom action doesn't work properly in batches, deselect the check box to disable batch processing. If the check box is unselected, the add-in invokes the custom action one row at a time.

Note:

The "batchEnabled" : false parameter in the service description only determines the default value of the Batch Mode Enabled check box in the Custom Action Editor. If the parameter is not configured, the Batch Mode Enabled check box is selected by default.

After the catalog is created, the check box setting controls how the add-in behaves.

Custom Action Limitations

Here are some things to keep in mind when using custom actions:

• Custom actions are not supported for pending Create rows or form in Create mode.
• Custom actions defined in the OpenAPI 3 service description document that have request payload schema members that match business object fields are unlikely to function properly.
• Oracle business object REST API service OpenAPI 3 service descriptions do not indicate which custom action request payload fields are required. You can use the Business Object Editor to adjust the Required property on payload fields. See Edit Custom Actions.
• Oracle business object REST API services do not return the updated row. As a result, you need to download before making further changes.
• The results of custom actions that return complex object values for the "result" member in the JSON response payload are not shown in the Status Viewer.