Master Drools programming from Beginner to Intermediate

What you'll learn
program rules in Drools 7 domain specific language
detect problems and patterns in software development that are good to be solved with a rule engine like Drools
decouple complex decision trees into individual simple to understand rules
Drools language constructs like insert, modify, exists, forall, insertLogical, salience, agenda-group etc

Requirements
You should have basic understanding of Java programming
Description
We learn Drools DSL (Drools programming language) and go over the most common DSL constructs. We move in small steps and gradually introduce new consepts so it is easier to follow even for a beginner.

This way we cover the most common Drools topics like

what is a rule engine

what is a difference between a method and a rule

why one would use a rule engine instead of writing regular Java code

understanding of the when/then clauses

understanding in which order the rules fire and when the order is not known

how to control the execution using activation-groups, agenda-groups and salience

declaring variables in DRL

difference between stateless and stateful sessions

inserting facts and modifying existing objects in the session

cross products (similar to SQL join)

exists, forall and collect

This course comes with a Java project that has all the code we look throughout this course. You are encouraged to check out and run the code yourself to get better understanding and experiment yourself with making changes to it. There are instructions how to get the code running in IntelliJ, Eclipse and VS Code.

After completing this course you have a better understanding of which kind of problems could be solved with Drools and how to write most common business rules in Drools DSL.

Who this course is for
Developers and system architects who need to understand what a rule engine is and which type of problems can be solved with it
Anyone who needs to write rules in Drools DSL programming language
Developers and system architects needing more info about adding Drools rule engine to their project

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