Adding a Metronome Input Operator
Similar with a synthetic input, this operator acts as a single timestamp field schema generator.
- On the Application page, click
and select Metronome 
in the Add Operator pane.
The Metronome node
icon displays in the Graph pane, as well as the properties to be defined in the Operator Settings pane, and the preview of the data in the Schema pane.
The right (outbound) edge allows you to connect to the other operators.
- In the Operator Settings pane, define or select the following required properties:
Property Description Node ID
The ID of the metronome operator.
Topic
The stream of records or input you will be subscribed to.
Select the Use Node ID checkbox to use the value entered in the Input ID. Otherwise, unselect the box and enter a new Topic ID.
When adding Topic IDs, ensure they:
-
Must be unique across an application
-
Must be specified
-
Must start with a letter (a to Z) or an underscore. Also, it can only contain letters (a to Z), numbers (0 to 9), and underscores
Partition Count
Enter the number of partitions for the Kafka topics that will be created for the Metronome operator.
Partitions allow you to parallelize a topic by splitting the data in a particular topic across multiple brokers wherein, each partition can be placed on a separate machine to allow for multiple consumers to read from a topic in parallel.
Interval
The interval of which the data should be published to the output stream.
Name Field Id
The ID of the name field.
Name
The name of the ID.
Timestamp
The name of the new column that will include the timestamp.
The preview of the data (OUTPUT) is displayed in the Schema pane.
-
- Save the changes.
Example
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