Master Drools Programming - Learn How To Write Drools Rules

Learn how to run and write rules for Drools Rule Engine using DRL files and how to work with spredsheet decision tables

What you'll learn
Program rules in Drools 7 domain specific language
Learn Drools language constructs like insert, modify, exists, forall, insertLogical, salience, agenda-group etc
Create spreadsheet decision tables and spreadsheet templates
What is Complex Event Processing and how Drools handles it
How to use rule templates (DRT or Freemarker) and run dynamically defined DRL
Understand different Drools running modes (active/passive, cloud/stream, sequential)
How Drools works internally and what to keep in mind for writing faster performing rules

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 concepts so it is easier to follow even for a beginner. This way we cover the most common Drools topics like:what is a rule enginewhat is the difference between a method and a rulewhy one would use a rule engine instead of writing regular Java codeunderstanding of the when/then clausesunderstanding in which order the rules fire and when the order is not knownhow to control the execution using activation groups, agenda groups and saliencedeclaring variables in DRLdifference between stateless and stateful sessionsinserting facts and modifying existing objects in the sessioncross products (similar to SQL join)exists, forall and collectusing spreadsheet decision tables to create Drools rulesusing templates for creating rules and feeding data into them from spreadsheets and other tabular data sourcescomplex event processing (CEP) in Droolsdifference between fact and eventdeclaring facts and events in Java and inside DRL codedifferent rule execution modes (active/passive, cloud/stream, sequential)time and length based sliding windowsentry-pointsglobal variablestimershow Drools internal algorithm Phreak worksThis course comes with two Java projects that have all the code we work with during this course. You are encouraged to check out and run the code yourself to get a better understanding and experiment yourself with making changes to it. There are instructions on how to get the code running in IntelliJ, Eclipse, and VS Code.After completing this course you have a better understanding of which kinds of problems could be solved with Drools and how to write the 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,Anyone who is considering using Drools for writing rules or processing stream of events