The following figure shows the flow and details of data processing during dashboard output.
Figure 10-25 Flow and details of data processing during dashboard output
This subsection describes the flow of data processing from output of dashboard-display data by a dashboard output connector to display of dashboard-display data by Dashboard Viewer. For details about tuple reception and mapping, see 10.6.2(2) Tuple reception and 10.6.2(3) Mapping. For details about the data formats handled by an output adaptor, see 10.6.2(1) Data formats handled by an output adaptor.
You specify information about data conversion to dashboard-display data by a dashboard output connector in the dashboard output connector definition in the adaptor configuration definition file.
A dashboard output connector obtains the common records after mapping, converts them to dashboard-display data according to the dashboard output connector definition, then outputs the data to the RMI communication area. You can use Dashboard Server to acquire the dashboard-display data in the RMI communication area.
You specify information about record deletion by a dashboard output connector in the dashboard output connector definition in the adaptor configuration definition file.
Dashboard-display data is deleted from the dashboard output connector's record area according to the record deletion condition specified in the dashboard output connector definition. You do this so that the dashboard-display data obtained by the dashboard output connector will not cause a memory shortage in the dashboard output connector.
When a dashboard output connector deletes dashboard-display data, it outputs to the adaptor trace information the date and time of deletion and the number of deleted dashboard-display data records.
The available record deletion methods are explained below:
You specify information about acquisition of dashboard-display data by Dashboard Server in the adaptor group definition.
Dashboard Server accesses the RMI communication area of the dashboard output connector and acquires the dashboard-display data that has been output.
To access the RMI communication area, Dashboard Server specifies the port number of the RMI server. You define the port number of the RMI server in the dashboardPortNo attribute in the in-process group definition or RMI group definition in the adaptor group definition. For details about this attribute, see 9.7.1 In-process group definition or 9.7.2 RMI group definition.
Dashboard Viewer acquires dashboard-display data from Dashboard Server and then displays it in a dashboard window.
Clients can view dashboard-display data as stream data summary analysis results by accessing the applicable URL from a Web browser and downloading Dashboard Viewer.
For details about how to display stream data summary analysis results on a dashboard, see 4.5 Displaying analysis results on a dashboard.