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Priority: Major
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Git Pull Request:
https://github.com/kiegroup/kogito-runtimes/pull/871
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optaplanner-core depends on kogito-drools (so drools-core-dynamic transitively) because it needs to work with scoreDRL being compiled at runtime.

In optaplanner-quarkus, we need to swap out dynamic for static but that alone is not enough:

    </dependency>
    <dependency>
      <groupId>org.optaplanner</groupId>
      <artifactId>optaplanner-core</artifactId>
      <exclusions>
        <exclusion>
          <groupId>org.kie.kogito</groupId>
          <artifactId>drools-core-dynamic</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.kie.kogito</groupId>
      <artifactId>drools-core-static</artifactId>
    </dependency>
    <dependency>
      <!-- PROBLEM I need to add this too to make it work -->
      <groupId>org.kie.kogito</groupId>
      <artifactId>kogito-ruleunits</artifactId>
    </dependency>

We shouldn't have to add kogito-ruleunits, especially as we don't use ruleunits.

But if we don't add it, we get this:

java.lang.ExceptionInInitializerError
        at org.drools.statics.StaticServiceRegistrySupplier.get(StaticServiceRegistrySupplier.java:27)
        at org.drools.statics.StaticServiceRegistrySupplier.get(StaticServiceRegistrySupplier.java:23)
        at org.kie.api.internal.utils.ServiceRegistry$Impl.getServiceRegistry(ServiceRegistry.java:88)
        at org.kie.api.internal.utils.ServiceRegistry$ServiceRegistryHolder.<clinit>(ServiceRegistry.java:47)
        at org.kie.api.internal.utils.ServiceRegistry.getInstance(ServiceRegistry.java:39)
        at org.kie.api.KieServices$Factory$LazyHolder.<clinit>(KieServices.java:349)
        at org.kie.api.KieServices$Factory.get(KieServices.java:356)
        at org.kie.api.KieServices.get(KieServices.java:340)
        at org.drools.modelcompiler.builder.KieBaseBuilder.createKieBaseFromModel(KieBaseBuilder.java:68)
        at org.drools.modelcompiler.builder.KieBaseBuilder.createKieBaseFromModel(KieBaseBuilder.java:60)
        at org.optaplanner.core.impl.score.stream.drools.DroolsConstraintSessionFactory.<init>(DroolsConstraintSessionFactory.java:70)
        at org.optaplanner.core.impl.score.stream.drools.DroolsConstraintFactory.buildSessionFactory(DroolsConstraintFactory.java:104)
        at org.optaplanner.core.impl.score.director.stream.ConstraintStreamScoreDirectorFactory.<init>(ConstraintStreamScoreDirectorFactory.java:77)
        at org.optaplanner.core.impl.score.director.ScoreDirectorFactoryFactory.buildConstraintStreamScoreDirectorFactory(ScoreDirectorFactoryFactory.java:185)
        at org.optaplanner.core.impl.score.director.ScoreDirectorFactoryFactory.decideMultipleScoreDirectorFactories(ScoreDirectorFactoryFactory.java:106)
        at org.optaplanner.core.impl.score.director.ScoreDirectorFactoryFactory.buildScoreDirectorFactory(ScoreDirectorFactoryFactory.java:74)
        at org.optaplanner.core.impl.solver.DefaultSolverFactory.buildScoreDirectorFactory(DefaultSolverFactory.java:115)
        at org.optaplanner.core.impl.solver.DefaultSolverFactory.buildSolver(DefaultSolverFactory.java:83)
        at org.optaplanner.quarkus.OptaPlannerProcessorXMLDefaultTest.solverConfigXml_default(OptaPlannerProcessorXMLDefaultTest.java:62)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at io.quarkus.test.QuarkusUnitTest.runExtensionMethod(QuarkusUnitTest.java:297)
        at io.quarkus.test.QuarkusUnitTest.interceptTestMethod(QuarkusUnitTest.java:265)
        at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
    ...
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.kie.kogito.rules.units.impl.DataSourceFactoryImpl
        at org.drools.statics.SimpleInstanceCreator.instance(SimpleInstanceCreator.java:34)
        at org.drools.statics.StaticServiceRegistry.wireServices(StaticServiceRegistry.java:60)
        at org.drools.statics.StaticServiceRegistry.<init>(StaticServiceRegistry.java:52)
        at org.drools.statics.StaticServiceRegistry.<clinit>(StaticServiceRegistry.java:45)
        ... 86 more
Caused by: java.lang.ClassNotFoundException: org.kie.kogito.rules.units.impl.DataSourceFactoryImpl
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
        at io.quarkus.bootstrap.classloading.QuarkusClassLoader.loadClass(QuarkusClassLoader.java:412)
        at io.quarkus.bootstrap.classloading.QuarkusClassLoader.loadClass(QuarkusClassLoader.java:365)
        at io.quarkus.bootstrap.classloading.QuarkusClassLoader.loadClass(QuarkusClassLoader.java:412)
        at io.quarkus.bootstrap.classloading.QuarkusClassLoader.loadClass(QuarkusClassLoader.java:365)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:315)
        at org.drools.statics.SimpleInstanceCreator.instance(SimpleInstanceCreator.java:32)
        ... 89 more

is related to

KOGITO-3735 Split off kogito-drools-api to make drools a lightweight dependency

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