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OptaPlanner Week 2020 recordings

Mon 7 September 2020

 Geoffrey De Smet

It’s a wrap! Last week, during the online OptaPlanner Week event, we had 10 talks by 13 speakers across 3 days with - per day - up to 250+ live attendees and 1300+ viewers afterwards. We’ve split up the talks into separate videos for your convenience, watch them below. Big thanks to all speakers...

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Constraint Streams - Modern Java constraints without the Drools Rule Language

Tue 7 April 2020

 Geoffrey De Smet

Traditionally, to scale out with OptaPlanner, you had to learn DRL. No more. With the new Constraints Streams API, inspired by Java 8 Streams and SQL, you can now write your constraints in Java (or Kotlin or Scala) and still benefit from incremental calculation. Underneath, Constraints Streams (CS) still use the powerful Drools engine. We also...

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Exploring the new OptaWeb Employee Rostering backend

Tue 22 October 2019

 Julian Cui

To help you solve employee shift rostering challenges, we maintain an end-to-end web application called OptaWeb Employee Rostering. It is a web application that optimizes shift scheduling for maximum efficiency and fairness for employees. Scheduling guards is very different from scheduling nurses, therefore you can fork and customize the code to your requirements. Recently,...

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Mechanic scheduling (part 2) - Architecture and integration

Thu 9 May 2019

 Musa Talluzi

The more smart devices are connected to the internet, the more in need of smarter systems we are. These systems should monitor, automate and maintain these devices in a robust and efficient way. In this demo, we simulate a factory plant containing multiple pieces of machinery. The system we built monitors these...

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Java Reflection, but much faster

Tue 9 January 2018

 Geoffrey De Smet

What is the fastest way to read a getter from a Java class without knowing the class at compilation time? Java frameworks often do this. A lot. And it can directly influence their performance. So let’s benchmark different approaches, such as reflection, method handles and code generation. The use case Presume we have a...

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Blog archive
Latest release
  • 8.1.0.Final released
    Fri 15 January 2021
Upcoming events
  • KIE Live
    Worldwide - Tue 19 January 2021
    • OptaPlanner Shadow Variables for the Vehicle Routing Problem and Task Assignment by Geoffrey De Smet, Karina Varela, Alex Porcelli
  • Javaland
    Worldwide - Tue 16 March 2021
    • AI on Quarkus: I love it when an OptaPlan comes together by Geoffrey De Smet
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Latest blog posts
  • Solve the facility location problem
    Fri 9 October 2020
     Jiří Locker
  • OptaPlanner Week 2020 recordings
    Mon 7 September 2020
     Geoffrey De Smet
  • Let’s OptaPlan your jBPM tasks (part 1) - Integrating the two worlds
    Fri 3 July 2020
     Walter Medvedeo
  • AI versus Covid-19: How Java helps nurses and doctors in this fight
    Fri 8 May 2020
     Christopher Chianelli
  • Workflow processes with AI scheduling
    Tue 5 May 2020
     Christopher Chianelli
  • Constraint Streams - Modern Java constraints without the Drools Rule Language
    Tue 7 April 2020
     Geoffrey De Smet
  • How to plan (and optimize) a Secret Santa
    Wed 18 December 2019
     Christopher Chianelli
Blog archive
Latest videos
  • YT Shadow variables
    Tue 19 January 2021
     Geoffrey De Smet
  • YT Domain modeling and design patterns
    Tue 17 November 2020
     Geoffrey De Smet
  • YT Quarkus insights: AI constraint solving
    Tue 20 October 2020
     Geoffrey De Smet
  • YT AI in kotlin
    Wed 23 September 2020
     Geoffrey De Smet
  • YT Planning agility: continuous planning, real-time planning and more
    Thu 3 September 2020
     Geoffrey De Smet
  • YT Quarkus and OptaPlanner: create a school timetable application
    Thu 3 September 2020
     Radovan Synek
  • YT Business use cases and the impact of OptaPlanner
    Thu 3 September 2020
     Satish Kale
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