Transformation Guide

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Router Transformation Configuration

The Router transformation uses two input ports. It reads the twitter messages from the data source and the ISO country codes from the Classifier transformation. The Router transformation routes the data on the input ports to different output ports based on a condition that you specify.

The following image shows the Router transformation port groups and port connections:

The mapping contains a data source object, a Classifier transformation, a Router transformation, and two data target objects. The Router transformation is expanded in the mapping editor to display the input ports and two output port groups.

The following table describes the configuration of the Router transformation:

Port Name	Port Type	Port Group	Precision
Classifier_Output	Input	Input	2
text	Input	Input	200
Classifier_Output	Input	Default	2
text	Input	Default	200
Classifier_Output	Input	En_Group	2
text	Input	En_Group	200

You configure the transformation to create data streams for English-language messages and for messages in other languages. To create a data stream, add an output port group to the transformation. Use the

Groups

options on the transformation to add the port group.

To determine how the transformation routes data to each data stream, you define a condition on a port group. The condition identifies a port and specifies a possible value on the port. When the transformation finds an input port value that matches the condition, it routes the input data to the port group that applies the condition.

Define the following condition on the En_Group:

ClassifierOutput='en'

The Router transformation reads data from two objects in the mapping. The transformation can combine the data in each output group because it does not alter the row sequence defined in the data objects.

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Transformation Guide

Transformation Guide

Router Transformation Configuration

Router Transformation Configuration