Apply Advanced Rules

This handler (com.rierino.handler.drools.DroolsProcessEventHandler) provides ability to execute business rules using Drools BRMS library

Handler Parameters

This handler is cacheable.

Parameter	Definition	Example	Default
config.state	Name of the state manager with rule domain configurations	ruledomain	-
domain	Name of the rule domain	product_discount	-
rules.state	Name of the state manager with rule definitions	rule_product_discount	-
buffer	Number of records to buffer before producing output for batch requests	100	-

428B

handler-drools-0001.json

Example Drools Handler Definition (Can be Imported on Element Screen)

This handler requires the following dependency added to deployment contents:

implementation (group:'com.rierino.custom', name: 'drools', version:"${rierinoVersion}")

Actions

Process / ProcessRules

Passes on structured request data to Drools and returns rule evaluation results in the output. Event metadata fields applicable for this action are as follows:

Field	Definition	Example	Default
inputElement	Json path for the input in request event payload	basket	-
outputElement	Json path for the output in response event payload	basket	-

With event metadata parameters as:

Parameter	Definition	Example	Default
inputPattern	JMESPath pattern to apply on data input	{items:items.productid}	-
outputPattern	JMESPath pattern to apply on data output, before returning response	{totalPrice:basket.totalPrice}	-
forEach	Field for each a separate record should be passed on to Drools	items	-
forEachMap	Json pattern for mapping each record that should be passed on to Drools, allowing replication of common data	-	-

Roles

processPulse

Passes a Json object with "id" field to Drools for evaluating rules, without returning any response.

processJournal

Follows the same flow as processPulse.

processRole

Passes a Json object with full role data to Drools for evaluating rules, without returning any response.

Commands

PROCESSID

Follows the same flow as processPulse, passing "id" field of the command parameters.