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The Route function can be used to apply different conditions on how data is handled depending on the value. This is a processor. It is recommended that the configuration be completed before connecting other processors or forwarders. The order in which each condition is added is the order in which each condition is applied to the input.

When multiple conditions are added to the Route function, you can re-order any condition by drag and drop method using the  icon on the Condition box.

To configure the Route function, the following is required:

FieldDescription
FieldThe input from the function preceding the Route function node in the stream. You can either customize the input field or select from the predefined options. 
Expression

The mathematical conditions to compare values and expressions. The available conditions are: 

  • Less than
  • Equal to
  • Not equal to
  • Greater than
  • List lesser than
  • List equal to
  • List greater than
  • Regexp
ValueThe value that you want to enter for the condition.


For the Route function to import the data from the preceding function(s) connected to it, a preview must be generated.

To generate a preview, take the following steps for configuring the condition(s):

  1. In Field, select an option from the drop-down list which is populated with the input from the function preceding the Route function in your stream. 
  2. In Expression, specify the condition or if you select Regexp, enter the regular expression that you want to apply in Value. Standard regular expressions are supported.
  3. In Value, specify the value or the regular expression depending on the function preceding the Route function. 
  4. To add a new condition, you can click the +New Condition button.


Note!

  1. Data is checked for matching against each condition only in the order in which the conditions are arranged in the configuration. Example, if the data matches the first condition, it is sent via the Output that you enter for that condition. If the data does not match with the first condition, it is checked to match against the second condition or the third condition and so on.
  2. If the data checked for matching in two or more conditions overlap, then the condition that is first in the order is considered.


Some examples for using the Regexp option in Expression:

Examples - Using regexp

If you have the following input:

shipment cost 
cost of shipment 
Shipment cost: 
SHIPMENT

When you enter shipment, the result is:

shipment cost => true
cost of shipment => true
Shipment cost: => false
SHIPMENT => false

When you enter [Ss]hipment, the result is:

shipment => true
Shipment => true
Shipment cost: => true
SHIPMENT => false

[a-zA-Z] - Matches all lowercase and uppercase letters

\w+ - Matches any word character (alphanumerical or underscore) with at least one length


The Route function also enables you to be able to handle data that is not matched with any of the conditions that you might have configured. In Handling of unmatched records, the available options are:

  • Discard: Discards the unmatched data
  • Create new output: Creates a new output with the name default and adds it to the Route function in the stream editor.


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