fix: Add fail-fast when node sharing is enabled in SolverConfig inste…

…ad of application.properties (TimefoldAI#766)

quarkus-integration/quarkus/deployment/src/main/java/ai/timefold/solver/quarkus/deployment/TimefoldProcessor.java

@@ -214,6 +214,7 @@ SolverConfigBuildItem recordAndRegisterBuildTimeBeans(CombinedIndexBuildItem com
 
         // Step 2 - validate all SolverConfig definitions
         assertNoMemberAnnotationWithoutClassAnnotation(indexView);
+        assertNodeSharingDisabled(solverConfigMap);
         assertSolverConfigSolutionClasses(indexView, solverConfigMap);
         assertSolverConfigEntityClasses(indexView);
         assertSolverConfigConstraintClasses(indexView, solverConfigMap);
@@ -330,6 +331,22 @@ Some solver configs (%s) don't specify a %s class, yet there are multiple availa
         assertTargetClasses(targetList, DotNames.PLANNING_SOLUTION);
     }
 
+    private void assertNodeSharingDisabled(Map<String, SolverConfig> solverConfigMap) {
+        for (var entry : solverConfigMap.entrySet()) {
+            var solverConfig = entry.getValue();
+            if (solverConfig.getScoreDirectorFactoryConfig() != null &&
+                    Boolean.TRUE
+                            .equals(solverConfig.getScoreDirectorFactoryConfig().getConstraintStreamAutomaticNodeSharing())) {
+                throw new IllegalStateException("""
+                        SolverConfig %s enabled automatic node sharing via SolverConfig, which is not allowed.
+                        Enable automatic node sharing with the property %s instead."""
+                        .formatted(
+                                entry.getKey(),
+                                "quarkus.timefold.solver.constraint-stream-automatic-node-sharing=true"));
+            }
+        }
+    }
+
     private void assertSolverConfigEntityClasses(IndexView indexView) {
         // No entity classes
         assertEmptyInstances(indexView, DotNames.PLANNING_ENTITY);

quarkus-integration/quarkus/deployment/src/test/java/ai/timefold/solver/quarkus/TimefoldProcessorNodeSharingFailFastTest.java

@@ -0,0 +1,40 @@
+package ai.timefold.solver.quarkus;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.fail;
+
+import ai.timefold.solver.quarkus.testdata.normal.constraints.TestdataQuarkusConstraintProvider;
+import ai.timefold.solver.quarkus.testdata.normal.domain.TestdataQuarkusEntity;
+import ai.timefold.solver.quarkus.testdata.normal.domain.TestdataQuarkusSolution;
+
+import org.jboss.shrinkwrap.api.ShrinkWrap;
+import org.jboss.shrinkwrap.api.spec.JavaArchive;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.test.QuarkusUnitTest;
+
+public class TimefoldProcessorNodeSharingFailFastTest {
+
+    @RegisterExtension
+    static final QuarkusUnitTest config = new QuarkusUnitTest()
+            .overrideConfigKey("quarkus.timefold.solver-config-xml",
+                    "ai/timefold/solver/quarkus/solverConfigWithNodeSharing.xml")
+            .setArchiveProducer(() -> ShrinkWrap.create(JavaArchive.class)
+                    .addClasses(TestdataQuarkusEntity.class,
+                            TestdataQuarkusSolution.class, TestdataQuarkusConstraintProvider.class)
+                    .addAsResource("ai/timefold/solver/quarkus/solverConfigWithNodeSharing.xml"))
+            .assertException(exception -> {
+                assertThat(exception).isInstanceOf(IllegalStateException.class)
+                        .hasMessageContainingAll(
+                                "enabled automatic node sharing via SolverConfig, which is not allowed.",
+                                "Enable automatic node sharing with the property",
+                                "quarkus.timefold.solver.constraint-stream-automatic-node-sharing=true");
+            });
+
+    @Test
+    void test() {
+        fail("Should not call this method.");
+    }
+
+}

quarkus-integration/quarkus/deployment/src/test/resources/ai/timefold/solver/quarkus/solverConfigWithNodeSharing.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<solver xmlns="https://timefold.ai/xsd/solver" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="https://timefold.ai/xsd/solver https://timefold.ai/xsd/solver/solver.xsd">
+  <scoreDirectorFactory>
+    <constraintStreamAutomaticNodeSharing>true</constraintStreamAutomaticNodeSharing>
+  </scoreDirectorFactory>
+</solver>