Altair® Panopticon

 

Connector for Streams Simulator

The Streams Simulator connector is very similar to the Text connector with the addition of the time windowing of message queue connectors.

Creating the Streams Simulator input data source includes setting for how fast and how many messages are pushed through in each batch.

Steps:

 

1.     Select the Text File Source.

The standard settings controlling how the text file is parsed  are listed.

These include:

Property

Description

Skip First N Rows

Specifies the number of rows that will be skipped.

Data Type Discovery

Specifies how many rows from the text file should be used when automatically determining the data types of the resulting columns.

Decimal Separator

Select either the dot (.) or comma (,) as the Decimal Separator.

Text Qualifier

Specifies if fields are enclosed by text qualifiers, and if present to ignore any column delimiters within these text qualifiers.

Column Delimiter

Specifies the column delimiter to be used when parsing the text file.

First Row Headings

Determines if the first row should specify the retrieved column headings, and not be used in data discovery.

 

2.     Click  to the fetch the schema based on the connection details. Consequently, the list of columns with the data type found from inspecting the first ‘n’ rows of the input data source is populated and the Save button is enabled.

This also populates the Id Column with the set of columns, of arbitrary type, that can be concatenated to form a unique row identifier.

3.     You can also opt to load or save a copy of the column definition.

4.     Click . A new column entry is displayed. Enter or select the following properties:

Property

Description

Name

The column name of the source schema.

Column Index

The column index controls the position of a column. Must be >= 0.

Type

The data type of the column. Can be a Text, Numeric, or Time

Date Format

The format when the data type is Time.

Filter

Defined parameters that can be used as filter.

Enabled

Determines whether the message should be processed.

 

To delete a column, check its  or all the column entries, check the topmost , then click .

5.     Date/Time values of output data and Date/Time inputs, where supported, are by default unchanged.

You can opt to define the Show in Timezone and Source Timezone settings.

6.     Select the Simulation Type:

·         Record

Sends the number of records for each interval of time. By default, records are sent in the same order as the source.

 

This simulation type allows the specification of the following:

¨        Sort Order

 

When you select the Use file sort order, it will use the default sorting order of the file.

When you either select Ascending or Descending as the Sort Order, this enables the Sorted by Column drop down list.

Select the column that will be used for the sorting.

¨        Playback Set Size

The number of records set to be updated during simulate/playback.

¨        Start Up Set Size

The number of records set to be published initially (on start-up).

¨        Playback Interval (ms)

The update interval period for the record-based playback. Default is 1000 (ms).

·         Time

Simulates records as they occur in real-time.

 

This simulation type allows the specification of the following:

¨        Playback Column

The playback column which is a Date/Time type.

¨        Playback Speed

A multiplier which either speed up or slow down the playback. Default is 1.

o    If 0 < value < 1 slow down

o    If value = 1 records will be published as they occur

o    if value > 1 speed up

 

   NOTE

For time-based simulation, if the Date/Time column have improper dates, it will fail and stop.

 

7.   Check the Loop box to enable looping through the file.

8.   For this section:

Refer to Define Real-Time Settings for more information.