use Spring Transactional annotation instead of JavaX

src/main/java/net/hostsharing/hsadminng/context/Context.java

@@ -1,10 +1,12 @@
 package net.hostsharing.hsadminng.context;
 
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
-import javax.transaction.Transactional;
+
+import static org.springframework.transaction.annotation.Propagation.*;
 
 @Service
 public class Context {
@@ -12,7 +14,7 @@ public class Context {
     @PersistenceContext
     private EntityManager em;
 
-    @Transactional(Transactional.TxType.MANDATORY)
+    @Transactional(propagation = MANDATORY)
     public void setCurrentUser(final String userName) {
         em.createNativeQuery(
             String.format(
@@ -27,7 +29,7 @@ public class Context {
         return String.valueOf(em.createNativeQuery("select currentUser()").getSingleResult());
     }
 
-    @Transactional(Transactional.TxType.MANDATORY)
+    @Transactional(propagation = MANDATORY)
     public void assumeRoles(final String roles) {
         em.createNativeQuery(
             String.format(
@@ -37,7 +39,7 @@ public class Context {
         ).executeUpdate();
     }
 
-    @Transactional(Transactional.TxType.MANDATORY)
+    @Transactional(propagation = MANDATORY)
     public void assumeNoSpecialRole() {
         em.createNativeQuery(
             "set local hsadminng.assumedRoles = '';"

src/test/java/net/hostsharing/hsadminng/context/ContextIntegrationTests.java

@@ -5,8 +5,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.test.annotation.DirtiesContext;
-
-import javax.transaction.Transactional;
+import org.springframework.transaction.annotation.Transactional;
 
 import static org.assertj.core.api.Assertions.assertThat;
 

src/test/java/net/hostsharing/hsadminng/hs/hscustomer/CustomerRepositoryIntegrationTest.java

@@ -8,10 +8,10 @@ import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.orm.jpa.JpaSystemException;
 import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.transaction.annotation.Transactional;
 
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceException;
-import javax.transaction.Transactional;
 import java.util.List;
 import java.util.UUID;
 

src/test/java/net/hostsharing/hsadminng/hs/hspackage/PackageControllerAcceptanceTest.java

@@ -11,8 +11,8 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
 import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.transaction.annotation.Transactional;
 
-import javax.transaction.Transactional;
 import java.util.UUID;
 
 import static java.lang.String.format;

src/test/java/net/hostsharing/hsadminng/hs/hspackage/PackageRepositoryIntegrationTest.java

@@ -9,9 +9,9 @@ import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.orm.jpa.JpaSystemException;
 import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.transaction.annotation.Transactional;
 
 import javax.persistence.EntityManager;
-import javax.transaction.Transactional;
 import java.util.List;
 
 import static net.hostsharing.test.JpaAttempt.attempt;

src/test/java/net/hostsharing/hsadminng/rbac/rbacuser/RbacUserControllerAcceptanceTest.java

@@ -9,9 +9,9 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.transaction.annotation.Transactional;
 
 import javax.persistence.EntityManager;
-import javax.transaction.Transactional;
 import java.util.UUID;
 
 import static org.assertj.core.api.Assertions.assertThat;