Spring Transaction not working - spring

Question

I'm having a problem with transactions, when execution reaches
taskExecutor.execute();
I get an Exception:
Caused by: org.springframework.transaction.IllegalTransactionStateException: No existing transaction found for transaction marked with propagation 'mandatory'
I know this error is self-explanatory, but I can't get it to work properly.
This is how I get the controller and make the call:
ApplicationContext context = new ClassPathXmlApplicationContext("META-INF/spring/applicationContext.xml");
BeanFactory beanFactory = context;
FacadeControler f = beanFactory.getBean("facadeController");
f.method(reservation);
This is my FacadeController:
package xxx;
import ...
#Service
public class FacadeControllerImpl implements FacadeController {
static Logger logger = Logger.getLogger(FacadeControllerImpl.class);
#Qualifier("executor")
#Autowired
private TaskExecutor taskExecutor;
#Transactional(propagation=Propagation.REQUIRED)
public Reservation method(Reservation reservationFromEndpoint){
...
taskExecutor.execute();
...
}
Here is the Executor:
#Component("executor")
public class QueueTaskExecutor implements TaskExecutor {
final static Logger logger = LoggerFactory.getLogger(QueueTaskExecutor.class);
#Autowired
protected QueuedTaskHolderDao queuedTaskDao;
#Autowired
protected Serializer serializer;
#Override
#Transactional(propagation=Propagation.MANDATORY)
public void execute(Runnable task) {
logger.debug("Trying to enqueue: {}", task);
AbstractBaseTask abt;
try {
abt = AbstractBaseTask.class.cast(task);
} catch (ClassCastException e) {
logger.error("Only runnables that extends AbstractBaseTask are accepted.");
throw new IllegalArgumentException("Invalid task: " + task);
}
// Serialize the task
QueuedTaskHolder newTask = new QueuedTaskHolder();
byte[] serializedTask = this.serializer.serializeObject(abt);
newTask.setTriggerStamp(abt.getTriggerStamp());
logger.debug("New serialized task takes {} bytes", serializedTask.length);
newTask.setSerializedTask(serializedTask);
// Store it in the db
this.queuedTaskDao.persist(newTask);
// POST: Task has been enqueued
}
}
Here is my applicationContext.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<!-- Where to look for Spring components -->
<context:annotation-config />
<context:component-scan base-package="com.xxx"/>
<!-- #Configurable with AspectJ -->
<context:spring-configured/>
<!-- A task scheduler that will call #Scheduled methods -->
<!-- <task:scheduler id="myScheduler" pool-size="10"/> -->
<!-- <task:annotation-driven scheduler="myScheduler"/> -->
<!-- DataSource -->
<bean class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" id="myDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/bbdd"/>
<property name="username" value="user"/>
<property name="password" value="pass"/>
</bean>
<!-- JPA Entity Manager -->
<bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="myEntityManagerFactory">
<property name="dataSource" ref="myDataSource" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter"></bean>
</property>
<property name="persistenceUnitName" value="comm_layer" />
<property name="jpaPropertyMap">
<map>
<entry key="eclipselink.weaving" value="false"/>
<entry key="eclipselink.ddl-generation" value="create-or-extend-tables"/>
<entry key="eclipselink.logging.level" value="INFO"/>
</map>
</property>
</bean>
<!-- Transaction management -->
<tx:annotation-driven mode="aspectj" />
<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
<property name="jpaDialect">
<bean class="org.springframework.orm.jpa.vendor.EclipseLinkJpaDialect" />
</property>
<property name="entityManagerFactory" ref="myEntityManagerFactory"/>
</bean>
<bean id="facadeController" class="xxx.FacadeControllerImpl">