Spring Boot: javax.persistence.TransactionRequiredException: Executing an update/delete query - spring-boot

Question

I am using Spring Boot and configured my Application like this:
#Configuration
#EnableAutoConfiguration
#EnableTransactionManagement
#ComponentScan
#EntityScan("ch.xy.model")
public class Application {
#Autowired
private ImportDAO importDao;
}
ImportDAO looks like that:
#Repository
public class ImportDAO {
#PersistenceContext
private EntityManager em;
#Transactional
void removeTempoAccounts() {
Query q = em.createQuery("DELETE FROM TempoAccount t WHERE t.manual = false");
q.executeUpdate();
}
}
But when removeTempoAcconts is executed I get:
Exception in thread "main" javax.persistence.TransactionRequiredException: Executing an update/delete query
at org.hibernate.jpa.spi.AbstractQueryImpl.executeUpdate(AbstractQueryImpl.java:71)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.orm.jpa.SharedEntityManagerCreator$DeferredQueryInvocationHandler.invoke(SharedEntityManagerCreator.java:360)
at com.sun.proxy.$Proxy49.executeUpdate(Unknown Source)
at ch.post.pf.jira.tempocats.pspimport.ImportDAO.removeTempoAccounts(ImportDAO.java:95)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:711)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)
at ch.post.pf.jira.tempocats.pspimport.ImportDAO$$EnhancerBySpringCGLIB$$1883cf82.removeTempoAccounts(<generated>)
at ch.post.pf.jira.tempocats.pspimport.PspImport.run(PspImport.java:32)
at ch.post.pf.jira.tempocats.pspimport.Application.main(Application.java:20)
What's wrong with my configuration?

Answer 1

#Transactional
void removeTempoAccounts() {
Method had default visibility. Therefore the proxy mechanism was not active!
After changing to public everthing works as expected!

Answer 2

Try to use the #Transactional annotation from Spring package
like #org.springframework.transaction.annotation.Transactional
Then it should work