Geoffrey De Smet

Geoffrey De Smet (Red Hat) is the lead and founder of OptaPlanner. Before joining Red Hat in 2010, he was formerly employed as a Java consultant, an A.I. researcher and an enterprise application project lead. He has contributed to many open source projects (such as drools, jbpm, pressgang, spring-richclient, several maven plugins, weld, arquillian, ...). Since he started OptaPlanner in 2006, he’s been passionately addicted to planning optimization.

Software Development
Geoffrey De SmetAugust 9th, 2017
0 190
Drools Canonical Model – Pure Java Rules
Rule engines, like Drools, typically make use of a custom language to define a set of rules. For example, the…
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Software Development
Geoffrey De SmetApril 20th, 2016
0 51
7 ways to fail your optimization project
When you put your optimization project into production, your enterprise will decrease expenses, increase customer satisfaction, improve employee happiness and/or…
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Enterprise Java
Geoffrey De SmetMarch 24th, 2016
0 306
Keycloak SSO Integration into jBPM and Drools Workbench
Introduction Single Sign On (SSO) and related token exchange mechanisms are becoming the most common scenario for the authentication and…
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Enterprise Java
Geoffrey De SmetMarch 24th, 2016
0 43
High Availability Drools Stateless Service in Openshift Origin
Hi everyone! On this blog post I wanted to cover a simple example showing how easy it is to scale…
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Enterprise Java
Geoffrey De SmetDecember 4th, 2015
0 67
Drools: A detailed description of internal code cleanups for fireAllRules, fireUntilHalt and Timers
In June we blogged about a new internal state machine to manage the interaction of User, Timer and Engine threads.…
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Core Java
Geoffrey De SmetNovember 18th, 2015
1 87
Using a reactive stream as a data source for Drools
A few months ago we started redesigning the Drools lowest level executable model and making it accessible to end user…
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Enterprise Java
Geoffrey De SmetSeptember 25th, 2015
0 30
Integrating JPA Hibernate with OptaPlanner
We’ve been improving the integration of OptaPlanner with the rest of JEE, so it’s easier to build end user applications…
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Core Java
Geoffrey De SmetAugust 11th, 2015
1 188
What is the fastest Garbage Collector in Java 8?
OpenJDK 8 has several Garbage Collector algorithms, such as Parallel GC, CMS and G1. Which one is the fastest? What…
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Software Development
Geoffrey De SmetApril 3rd, 2015
0 48
OptaPlanner – How fast is logging?
What’s the cost of trace/debug logging in production? What’s the performance cost of logging to a file? In these benchmarks,…
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Thank you!