Improve error message when multiple hibernate interceptors are found

extensions/hibernate-orm/deployment/src/test/java/io/quarkus/hibernate/orm/boot/AmbiguousPersistenceUnitExtensionTest.java

@@ -0,0 +1,43 @@
+package io.quarkus.hibernate.orm.boot;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.hibernate.Interceptor;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.hibernate.orm.MyEntity;
+import io.quarkus.hibernate.orm.PersistenceUnitExtension;
+import io.quarkus.test.QuarkusUnitTest;
+
+public class AmbiguousPersistenceUnitExtensionTest {
+
+    @RegisterExtension
+    static QuarkusUnitTest runner = new QuarkusUnitTest()
+            .withApplicationRoot((jar) -> jar
+                    .addClass(MyEntity.class)
+                    .addClass(PersistenceUnitInterceptor.class)
+                    .addClass(AnotherPersistenceUnitInterceptor.class))
+            .withConfigurationResource("application.properties")
+            .assertException(throwable -> assertThat(throwable)
+                    .hasNoSuppressedExceptions()
+                    .rootCause()
+                    .hasMessageContainingAll("Multiple instances of Interceptor were found for persistence unit <default>.",
+                            "At most one instance can be assigned to each persistence unit. Instances found:",
+                            "io.quarkus.hibernate.orm.boot.AmbiguousPersistenceUnitExtensionTest.PersistenceUnitInterceptor",
+                            "io.quarkus.hibernate.orm.boot.AmbiguousPersistenceUnitExtensionTest.AnotherPersistenceUnitInterceptor"));
+
+    @PersistenceUnitExtension
+    public static class PersistenceUnitInterceptor implements Interceptor {
+    }
+
+    @PersistenceUnitExtension
+    public static class AnotherPersistenceUnitInterceptor implements Interceptor {
+    }
+
+    @Test
+    public void test() {
+        Assertions.fail("Startup should have failed");
+    }
+}

extensions/hibernate-orm/runtime/src/main/java/io/quarkus/hibernate/orm/runtime/PersistenceUnitUtil.java

@@ -3,6 +3,7 @@
 import java.lang.annotation.Annotation;
 import java.util.Arrays;
 import java.util.Comparator;
+import java.util.List;
 import java.util.Locale;
 
 import jakarta.enterprise.inject.Default;
@@ -30,10 +31,12 @@ public static <T> InjectableInstance<T> singleExtensionInstanceForPersistenceUni
         InjectableInstance<T> instance = extensionInstanceForPersistenceUnit(beanType, persistenceUnitName,
                 additionalQualifiers);
         if (instance.isAmbiguous()) {
+            List<String> ambiguousClassNames = instance.handlesStream().map(h -> h.getBean().getBeanClass().getCanonicalName())
+                    .toList();
             throw new IllegalStateException(String.format(Locale.ROOT,
                     "Multiple instances of %1$s were found for persistence unit %2$s. "
-                            + "At most one instance can be assigned to each persistence unit.",
-                    beanType.getSimpleName(), persistenceUnitName));
+                            + "At most one instance can be assigned to each persistence unit. Instances found: %3$s",
+                    beanType.getSimpleName(), persistenceUnitName, ambiguousClassNames));
         }
         return instance;
     }

extensions/hibernate-search-orm-elasticsearch/deployment/src/test/java/io/quarkus/hibernate/search/orm/elasticsearch/test/boot/AmbiguousSearchExtensionTest.java

@@ -0,0 +1,73 @@
+package io.quarkus.hibernate.search.orm.elasticsearch.test.boot;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+
+import org.hibernate.search.engine.reporting.EntityIndexingFailureContext;
+import org.hibernate.search.engine.reporting.FailureContext;
+import org.hibernate.search.engine.reporting.FailureHandler;
+import org.hibernate.search.mapper.pojo.mapping.definition.annotation.Indexed;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.hibernate.search.orm.elasticsearch.SearchExtension;
+import io.quarkus.test.QuarkusUnitTest;
+
+public class AmbiguousSearchExtensionTest {
+
+    @RegisterExtension
+    static QuarkusUnitTest runner = new QuarkusUnitTest()
+            .withApplicationRoot((jar) -> jar
+                    .addClass(MyEntity.class)
+                    .addClass(SearchFailureHandler.class)
+                    .addClass(AnotherSearchFailureHandler.class)
+                    .addAsResource("application.properties"))
+            .assertException(throwable -> assertThat(throwable)
+                    .hasNoSuppressedExceptions()
+                    .rootCause()
+                    .hasMessageContainingAll(
+                            "Multiple instances of FailureHandler were found for Hibernate Search in persistence unit <default>.",
+                            "At most one instance can be assigned to each persistence unit. Instances found:",
+                            "io.quarkus.hibernate.search.orm.elasticsearch.test.boot.AmbiguousSearchExtensionTest.SearchFailureHandler",
+                            "io.quarkus.hibernate.search.orm.elasticsearch.test.boot.AmbiguousSearchExtensionTest.AnotherSearchFailureHandler"));
+
+    @Entity
+    @Indexed
+    static class MyEntity {
+
+        @Id
+        @GeneratedValue
+        private Long id;
+    }
+
+    @SearchExtension
+    public static class SearchFailureHandler implements FailureHandler {
+        @Override
+        public void handle(FailureContext failureContext) {
+        }
+
+        @Override
+        public void handle(EntityIndexingFailureContext entityIndexingFailureContext) {
+        }
+    }
+
+    @SearchExtension
+    public static class AnotherSearchFailureHandler implements FailureHandler {
+        @Override
+        public void handle(FailureContext failureContext) {
+        }
+
+        @Override
+        public void handle(EntityIndexingFailureContext entityIndexingFailureContext) {
+        }
+    }
+
+    @Test
+    public void test() {
+        Assertions.fail("Startup should have failed");
+    }
+}

extensions/hibernate-search-orm-elasticsearch/runtime/src/main/java/io/quarkus/hibernate/search/orm/elasticsearch/runtime/bean/HibernateSearchBeanUtil.java

@@ -28,21 +28,23 @@ private static <T> Optional<BeanReference<T>> singleExtensionBeanReferenceFor(Cl
             String persistenceUnitName, String backendName, String indexName) {
         InjectableInstance<T> instance = extensionInstanceFor(beanType, persistenceUnitName, backendName, indexName);
         if (instance.isAmbiguous()) {
+            List<String> ambiguousClassNames = instance.handlesStream().map(h -> h.getBean().getBeanClass().getCanonicalName())
+                    .toList();
             if (indexName != null) {
                 throw new IllegalStateException(String.format(Locale.ROOT,
-                        "Multiple instances of %1$s were found for Hibernate Search index %3$s in persistence unit %2$s."
-                                + " At most one instance can be assigned to each index.",
-                        beanType.getSimpleName(), persistenceUnitName, indexName));
+                        "Multiple instances of %1$s were found for Hibernate Search index %2$s in persistence unit %3$s."
+                                + " At most one instance can be assigned to each index. Instances found: %4$s",
+                        beanType.getSimpleName(), indexName, persistenceUnitName, ambiguousClassNames));
             } else if (backendName != null) {
                 throw new IllegalStateException(String.format(Locale.ROOT,
-                        "Multiple instances of %1$s were found for Hibernate Search backend %3$s in persistence unit %2$s."
-                                + " At most one instance can be assigned to each backend.",
-                        beanType.getSimpleName(), persistenceUnitName, backendName));
+                        "Multiple instances of %1$s were found for Hibernate Search backend %2$s in persistence unit %3$s."
+                                + " At most one instance can be assigned to each backend. Instances found: %4$s",
+                        beanType.getSimpleName(), backendName, persistenceUnitName, ambiguousClassNames));
             } else {
                 throw new IllegalStateException(String.format(Locale.ROOT,
                         "Multiple instances of %1$s were found for Hibernate Search in persistence unit %2$s."
-                                + " At most one instance can be assigned to each persistence unit.",
-                        beanType.getSimpleName(), persistenceUnitName));
+                                + " At most one instance can be assigned to each persistence unit. Instances found: %3$s",
+                        beanType.getSimpleName(), persistenceUnitName, ambiguousClassNames));
             }
         }
         return instance.isResolvable() ? Optional.of(new ArcBeanReference<>(instance.getHandle().getBean())) : Optional.empty();

extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/java/io/quarkus/hibernate/search/standalone/elasticsearch/test/boot/AmbiguousSearchExtensionTest.java

@@ -0,0 +1,69 @@
+package io.quarkus.hibernate.search.standalone.elasticsearch.test.boot;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.hibernate.search.engine.reporting.EntityIndexingFailureContext;
+import org.hibernate.search.engine.reporting.FailureContext;
+import org.hibernate.search.engine.reporting.FailureHandler;
+import org.hibernate.search.mapper.pojo.mapping.definition.annotation.DocumentId;
+import org.hibernate.search.mapper.pojo.mapping.definition.annotation.Indexed;
+import org.hibernate.search.mapper.pojo.mapping.definition.annotation.SearchEntity;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.hibernate.search.standalone.elasticsearch.SearchExtension;
+import io.quarkus.test.QuarkusUnitTest;
+
+public class AmbiguousSearchExtensionTest {
+    @RegisterExtension
+    static QuarkusUnitTest runner = new QuarkusUnitTest()
+            .withApplicationRoot((jar) -> jar
+                    .addClass(MyEntity.class)
+                    .addClass(SearchFailureHandler.class)
+                    .addClass(AnotherSearchFailureHandler.class)
+                    .addAsResource("application.properties"))
+            .assertException(throwable -> assertThat(throwable)
+                    .hasNoSuppressedExceptions()
+                    .rootCause()
+                    .hasMessageContainingAll(
+                            "Multiple instances of FailureHandler were found for Hibernate Search Standalone.",
+                            "At most one instance can be assigned. Instances found:",
+                            "io.quarkus.hibernate.search.standalone.elasticsearch.test.boot.AmbiguousSearchExtensionTest.SearchFailureHandler",
+                            "io.quarkus.hibernate.search.standalone.elasticsearch.test.boot.AmbiguousSearchExtensionTest.AnotherSearchFailureHandler"));
+
+    @SearchEntity
+    @Indexed
+    public static class MyEntity {
+        @DocumentId
+        private Long id;
+    }
+
+    @SearchExtension
+    public static class SearchFailureHandler implements FailureHandler {
+        @Override
+        public void handle(FailureContext failureContext) {
+        }
+
+        @Override
+        public void handle(EntityIndexingFailureContext entityIndexingFailureContext) {
+        }
+    }
+
+    @SearchExtension
+    public static class AnotherSearchFailureHandler implements FailureHandler {
+        @Override
+        public void handle(FailureContext failureContext) {
+        }
+
+        @Override
+        public void handle(EntityIndexingFailureContext entityIndexingFailureContext) {
+        }
+    }
+
+    @Test
+    public void test() {
+        Assertions.fail("Startup should have failed");
+    }
+
+}

extensions/hibernate-search-standalone-elasticsearch/runtime/src/main/java/io/quarkus/hibernate/search/standalone/elasticsearch/runtime/bean/HibernateSearchBeanUtil.java

@@ -28,21 +28,23 @@ private static <T> Optional<BeanReference<T>> singleExtensionBeanReferenceFor(Cl
             String backendName, String indexName) {
         InjectableInstance<T> instance = extensionInstanceFor(beanType, backendName, indexName);
         if (instance.isAmbiguous()) {
+            List<String> ambiguousClassNames = instance.handlesStream().map(h -> h.getBean().getBeanClass().getCanonicalName())
+                    .toList();
             if (indexName != null) {
                 throw new IllegalStateException(String.format(Locale.ROOT,
                         "Multiple instances of %1$s were found for Hibernate Search Standalone index %2$s."
-                                + " At most one instance can be assigned to each index.",
-                        beanType.getSimpleName(), indexName));
+                                + " At most one instance can be assigned to each index. Instances found: %3$s",
+                        beanType.getSimpleName(), indexName, ambiguousClassNames));
             } else if (backendName != null) {
                 throw new IllegalStateException(String.format(Locale.ROOT,
                         "Multiple instances of %1$s were found for Hibernate Search Standalone backend %2$s."
-                                + " At most one instance can be assigned to each backend.",
-                        beanType.getSimpleName(), backendName));
+                                + " At most one instance can be assigned to each backend. Instances found: %3$s",
+                        beanType.getSimpleName(), backendName, ambiguousClassNames));
             } else {
                 throw new IllegalStateException(String.format(Locale.ROOT,
                         "Multiple instances of %1$s were found for Hibernate Search Standalone."
-                                + " At most one instance can be assigned.",
-                        beanType.getSimpleName()));
+                                + " At most one instance can be assigned. Instances found: %2$s",
+                        beanType.getSimpleName(), ambiguousClassNames));
             }
         }
         return instance.isResolvable() ? Optional.of(new ArcBeanReference<>(instance.getHandle().getBean())) : Optional.empty();