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quarkusoptaplanner

Quarkus - Optaplanner tweaking algorithms

I created a new file known as "solverConfig.xml" under resources. I changed in application.properties, to write the following: quarkus.optaplanner.solver-config-xml=src/main/resources/solverConfig.xml. However, Quarkus does not recognize the classpath. It says: Invalid quarkus.optap lanner.solverConfigXML property (src/main/resources/solverConfig.xml): that classpath resource does not exist. I followed the response of Optaplanner and Quarkus solver config update. But, it does not work.

The solverConfig.xml is configured as:

<!-- Domain model configuration -->
<solutionClass>org.acme.optaplanner.domain.TimeTable</solutionClass>
<entityClass>org.acme.optaplanner.domain.Lesson</entityClass>

<!-- Score configuration -->
<scoreDirectorFactory>
    <constraintProviderClass>org.acme.optaplanner.solver.TimeTableConstraintProvider</constraintProviderClass>
</scoreDirectorFactory>

<!-- Optimization algorithms configuration -->
<termination>
    <minutesSpentLimit>1</minutesSpentLimit>
</termination>

<constructionHeuristic>
<constructionHeuristicType>FIRST_FIT_DECREASING</constructionHeuristicType>
</constructionHeuristic>
Solution

  • The src/main/resources prefix isn't part of the value for that property:

    • Either don't have a quarkus.optaplanner.solver-config-xml property in application.properties, which means it will pick up src/main/resources/solverConfig.xml (recommended, for standardization only)

    • Or set it explicitly to quarkus.optaplanner.solver-config-xml=solverConfig.xml to pick up src/main/resources/solverConfig.xml.

    PS: solverConfig.xml in Quarkus doesn't need a entityClass, solutionClass or constraintProviderClass. It picks that up automatically.