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dfpaulino / rule-evaluator-jpa

rule evaluator jpa starter
GNU General Public License v3.0
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rule-evaluator-jpa

CircleCI

This is a ready to use user-friendly program to evaluate/apply logical expressions to incomming request The core of thi rule evaluation is rule-evaluator-service, where the rule evaluation happens. The Rule-evaluator-jpa makes use of the rule-evaluator-service, and makes the rule creation easy.

This uses JPA (H2,mysql,postgres) to persist the rules. Upon start the information in the database is transformed into rules, and loads them into memory (rule-evaluator-service). Once the rules are loaded into memory, no further transactions with the database occurs (unless there is a reload request)

Three main groupsREST API's are provided to allow the user to create/update/delete rules, evaluate rules and reload rules. Each group of API's are defined in the Wiki page of this project API spec

Concepts

Its important to understand the concept around this project before attempting to configure any rule A Rule is an Object that is composed by

  1. Name - rule name
  2. priority
  3. list of Actions (not supported yet)
  4. group of rules/expressions - we call this a groupComposite, as this can be composed by other groups and/or predicates

The GroupComposite (group) is an object that is composed by

  1. Logical operation
  2. List of other groups
  3. List of predicates

The predicate is the raw expression (A>1)