Gateway
Overview
The Gateway tool waits for a condition to be met on the Trigger (T) input before copying all records from the Data (D) input to the output. In some configurations, the trigger condition is not met and the data stream will be empty. The default condition ("Trigger on end of records") is usually the desired behavior ("wait until the Trigger input is finished and then activate the data stream").
Gateway tool configuration parameters
The Gateway tool has a single set of configuration parameter in addition to the standard execution options.
Parameter | Description |
|---|---|
Trigger on | The condition that must be met before the tool will activate the data stream:
|
Use condition field | If Trigger on is First record or Last record, you may optionally select Use condition field and specify a Boolean Condition field to query when determining whether to activate the data stream. |
Configure the Gateway tool
Connect Trigger "T" and Data "D" inputs to the Gateway tool.
Select the Gateway tool.
Go to the Configuration tab on the Properties pane.
Select the desired Trigger on condition:
First record: wait for the first record on the Trigger input. An empty Trigger input will never activate the data stream.
Last record: wait for the last record on the Trigger input. An empty Trigger input will never activate the data stream.
End of records: (default) wait for the end of the Trigger input. In contrast to Last record, an empty Trigger input will activate the data stream.
If you selected First record or Last record in step 3, you may optionally select Use condition field and select a Boolean Condition field from the Trigger "T" input.
Optionally, go to the Execution tab, and then set Web service options.