Using TCCL while looking for Integrators

Add Integrator tests

Fixes #7189

extensions/hibernate-orm/deployment/src/main/java/io/quarkus/hibernate/orm/deployment/HibernateOrmProcessor.java

@@ -222,16 +222,16 @@ public final class HibernateOrmProcessor {
         recorderContext.registerNonDefaultConstructor(ParsedPersistenceXmlDescriptor.class.getDeclaredConstructor(URL.class),
                 (i) -> Collections.singletonList(i.getPersistenceUnitRootUrl()));
 
+        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
         // inspect service files for additional integrators
         Collection<Class<? extends Integrator>> integratorClasses = new LinkedHashSet<>();
-        for (String integratorClassName : ServiceUtil.classNamesNamedIn(getClass().getClassLoader(),
+        for (String integratorClassName : ServiceUtil.classNamesNamedIn(classLoader,
                 "META-INF/services/org.hibernate.integrator.spi.Integrator")) {
             integratorClasses.add((Class<? extends Integrator>) recorderContext.classProxy(integratorClassName));
         }
-
         // inspect service files for service contributors
         Collection<Class<? extends ServiceContributor>> serviceContributorClasses = new LinkedHashSet<>();
-        for (String serviceContributorClassName : ServiceUtil.classNamesNamedIn(getClass().getClassLoader(),
+        for (String serviceContributorClassName : ServiceUtil.classNamesNamedIn(classLoader,
                 "META-INF/services/org.hibernate.service.spi.ServiceContributor")) {
             serviceContributorClasses
                     .add((Class<? extends ServiceContributor>) recorderContext.classProxy(serviceContributorClassName));

integration-tests/jpa/src/main/java/io/quarkus/it/jpa/integrator/IntegratorResource.java

@@ -0,0 +1,24 @@
+package io.quarkus.it.jpa.integrator;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.inject.Inject;
+import javax.persistence.EntityManager;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+
+@Path("/integrator")
+@ApplicationScoped
+public class IntegratorResource {
+
+    @Inject
+    EntityManager em;
+
+    @GET
+    @Produces(MediaType.TEXT_PLAIN)
+    public int create() {
+        return TestIntegrator.COUNTER.get();
+    }
+
+}

integration-tests/jpa/src/main/java/io/quarkus/it/jpa/integrator/TestIntegrator.java

@@ -0,0 +1,23 @@
+package io.quarkus.it.jpa.integrator;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.hibernate.boot.Metadata;
+import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.integrator.spi.Integrator;
+import org.hibernate.service.spi.SessionFactoryServiceRegistry;
+
+public class TestIntegrator implements Integrator {
+    public static final AtomicInteger COUNTER = new AtomicInteger();
+
+    @Override
+    public void integrate(Metadata metadata, SessionFactoryImplementor sessionFactory,
+            SessionFactoryServiceRegistry serviceRegistry) {
+        COUNTER.incrementAndGet();
+    }
+
+    @Override
+    public void disintegrate(SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {
+        COUNTER.decrementAndGet();
+    }
+}

integration-tests/jpa/src/main/resources/META-INF/services/org.hibernate.integrator.spi.Integrator

@@ -0,0 +1 @@
+io.quarkus.it.jpa.integrator.TestIntegrator

integration-tests/jpa/src/test/java/io/quarkus/it/jpa/integrator/JPAIntegratorTest.java

@@ -0,0 +1,20 @@
+package io.quarkus.it.jpa.integrator;
+
+import static io.restassured.RestAssured.when;
+import static org.hamcrest.core.Is.is;
+
+import org.junit.jupiter.api.Test;
+
+import io.quarkus.test.junit.QuarkusTest;
+
+@QuarkusTest
+public class JPAIntegratorTest {
+
+    @Test
+    public void testInjection() {
+        when().get("/jpa-test/integrator").then()
+                .statusCode(200)
+                .body(is("1"));
+    }
+
+}