registerDataDrivenContent

registerDataDrivenContent(options, onMessage): DataDrivenContentHandle

This function is used to receive and dispatch messages to a data-driven content object. If the report is not yet opened then this call will open it and initiate data processing for this data-driven content object.

To find the correct values for url, reportUri, and objectName, see the Getting Started page.

Arguments

options: Object

Choose options for how to connect to the server. The following properties are supported:

• url: string: Specify the URL of the SAS Viya server that hosts the report. This is the full context root, including the protocol, optional port, and host.
• reportUri: string: Specify the report URI.
• objectName: string: Specify name of the data-driven content object.
• authenticationType: string: Choose the method to authenticate requests to the SAS Viya server.
  • 'guest' automatically signs in to the SAS Viya server as the guest user.
  • 'credentials' default uses SAS Logon to establish an authenticated session.

onMessage: (receivedMessage: Object) => void

Define a callback function to handle data changes for this data-driven content object. This function is called every time the data for this object is updated. The properties of the receivedMessage object as well as more information about receiving data for data driven content can be found in the SAS documentation for Receiving Data.

Return value

registerDataDrivenContent returns a DataDrivenContentHandle which can be used to dispatch messages to the data-driven content object.

The receivedMessage object

The receivedMessage object is passed to the onMessage callback every time the data-driven content object is updated. It contains the report object's data and additional metadata.

resultName: string

The name of the associated query result. This name is needed for communicating any messages from the data-driven content object back to SAS Visual Analytics.

rowCount: number

The number of rows of data returned. If all the data has been filtered out or no data items are assigned to the object, then the row count is 0.

columns: Object[]

An array of column objects that let the author determine the type of data and other attributes such as format and label. Each column object supports the following properties:

• name: string A unique name for the column.
• label: string A human-readable label for the column.
• type: string The data type of the entries in that column. Can be 'number' or 'string'.
• usage: string Describes how the column is used. The special value 'brush' indicates that this column holds row selection data. If a row is selected, then the value in the 'brush' column has a value greater than 0.
• aggregation: string An optional string that describes how the values in this column are aggregated together.
• format: Object An object describing how the data should be formatted for a column of type 'number'. It has the following properties:
  • name: string A name for the format
  • width: number The maximum number of characters for the formatted value.
  • precision: number The number of digits after the decimal place.
  • formatString: string A string that completely specifies the formatting by combining the name, width, and precision.

data: (string|number)[]

The query results stored in a two-dimensional array. The data is in row-major order. So, receivedMessage.data[0] is the first row of data and receivedMessage.data[0][0] is the first column in the first row. The data in this array is unformatted for measures. Specifying a format for a measure has no impact on the data returned. Dates and datetimes are formatted, so the data reflects the format that is specified on any date or datetime variable.

Example

{
  version: '1',
  resultName: 'dd40',
  rowCount: 3,
  data: [
    ['Finch', 95000.0, 0.42857142857142855],
    ['Jones', 26000.0, 0.0],
    ['Smith', 108000.0, 0.5]
  ],
  columns: [
    {
      name: 'bi184',
      label: 'dealer',
      type: 'string'
    },
    {
      name: 'bi258',
      label: 'sales',
      type: 'number',
      usage: 'quantitative',
      aggregation: 'sum',
      format: {
        name: 'BEST',
        width: 12,
        precision: 0,
        formatString: 'BEST12.'
      }
    },
    {
      name: 'ri1',
      type: 'number',
      usage: 'brush',
      format: {
        name: 'COMMA',
        width: 12,
        precision: 2,
        formatString: 'COMMA12.2'
      }
    }
  ]
};