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 SmetMarch 17th, 2014
0 59
Can MapReduce solve planning problems?
To solve a planning or optimization problem, some solvers tend to scale out poorly: As the problem has more variables…
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Enterprise Java
Geoffrey De SmetFebruary 17th, 2014
0 103
Drools 6 Performance with the PHREAK Algorithm
Drools 6 introduces a new lazy matching algorithm. The details of that algorithm have been covered in two previous blogs:…
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Enterprise Java
Geoffrey De SmetJanuary 29th, 2014
0 30
Drools : PHREAK Stack Based Evaluations and Backward Chaining
A while back I wrote a blog on our new algorithm: http://blog.athico.com/2013/11/rip-rete-time-to-get-phreaky.html Someone asked me about the new stack based…
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Enterprise Java
Geoffrey De SmetNovember 8th, 2013
0 101
R.I.P. RETE time to get PHREAKY
I’ve just done some high level documentation for the new rule algorithm I’ve called PHREAK, a word play on Hybrid…
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Enterprise Java
Geoffrey De SmetNovember 5th, 2013
0 20
KIE-WB / JBPM Console Ng – Configurations
Hi all, this is a follow up post from my previous entry about how to use the jBPM Console. The…
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Enterprise Java
Geoffrey De SmetJune 10th, 2013
1 305
Goodbye Guvnor. Hello Drools Workbench.
Many things are changing for Drools 6.0. Along with the functional and feature changes we have restructured the Guvnor github…
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Enterprise Java
Geoffrey De SmetMay 23rd, 2013
0 74
Creating your own Drools and jBPM Persistence with Infinispan
Original post here by me: Hello and welcome to a post in which I intend to show you how to…
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Enterprise Java
Geoffrey De SmetApril 9th, 2013
0 42
Score DRL: faster and easier in OptaPlanner
For OptaPlanner (= Drools Planner) 6.0.0.Beta1, I ‘ve replaced the ConstraintOccurrence with the much more elegant ConstraintMatch system. The result…
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Enterprise Java
Geoffrey De SmetMarch 27th, 2013
0 24
Drools Planner renames to OptaPlanner: Announcing www.optaplanner.org
We’re proud to announce the rename Drools Planner to OptaPlanner starting with version 6.0.0.Beta1. We’re also happy to unveil its…
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