Groupby – a new way to accumulate facts in DRL

Have you ever wanted to accumulate facts that share a particular property (for instance, the count of people in each department) in DRL? With the addition of groupby to DRL, it is easier to write rules that divide facts into groups where each group is accumulated separately.

Christopher Chianelli July 11, 2023

Toward a reliable and fully recoverable Drools stateful session

One of the most important features of Drools is the possibility of evaluating rules in an interactive and conversational way, allowing to use inferenc...

Mario Fusco May 17, 2023

Integrate Excel with Drools on OpenShift with Knative and Quarkus!

In this blog post I want to share the results of a technical exploration in bridging, bringing together and integrating a diverse set of technologies ...

Matteo Mortari May 4, 2023

Simplify Kubernetes debugging with declarative logic

We put Drools inside Kubernetes’ control plane …you wouldn’t believe what happened next! 😉 This is a longer post on the current status of exp...

Matteo Mortari March 23, 2023

CloudEvents labeling and classification with Drools

This blog post is a quick update on a demo in labeling CNCF’s CloudEvents. Introduction Categorizing events is a general, common use-case; in the co...

Matteo Mortari February 8, 2023

Smarter Decision Tables Generation through Data Types Constraints

The Decision Model and Notation (DMN) is an effective, yet standardized, tool for designing complex decisions, in special decision tables. Even though...

Jozef Marko January 17, 2023

Exceptional rules, with Drools and Kogito

Managing exceptional rules is easy, thanks to Drools and Kogito! In this use-case, we have a base business process and a default knowledge base with r...

Matteo Mortari January 14, 2023

Drools Reactive Messaging processing

The latest Drools 8.31.0.Final comes with a Reactive Messaging example, which demonstrates reactively consuming messages from a Kafka topic, firing rules and then sending result messages to another Kafka topic

Toshiya Kobayashi November 29, 2022

Drools 8 Final – toward a modular and cloud native rule engine

The Drools team is happy to announce that our rule engine reached the 8 Final release. Drools 8-series is a natural evolution of the 7.x-stream, incor...

Mario Fusco October 17, 2022

Drools trouble-shooting : Memory issues

Memory issues are another frequent topic in Drools trouble-shooting. This article will explain how to solve issues like a memory leak.

Toshiya Kobayashi September 29, 2022

Transparent ML, integrating Drools with AIX360

Following up from a previous blog post about integrating Drools with the Open Prediction Service, in this new post we want to share the current result...

Matteo Mortari September 20, 2022

a DMN FEEL handbook

We’re introducing an (experimental) DMN FEEL handbook, an helpful companion for your DMN modeling activities! You can access this new helpful re...

Matteo Mortari August 18, 2022