Wildfly 11 - lazy loading in hybernet

[arkadyz]

Hello,

EJB annotation OneToOne with LAZY fetch type doesn't work in Wildfly 11.

We are trying following:

@OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "device")

@LazyToOne(LazyToOneOption.NO_PROXY)

It doesn't help.

In Wildfly 2.8.0 we solved this by using of org.hibernate.bytecode.internal.javassist.FieldHandled and org.hibernate.bytecode.internal.javassist.FieldHandler but these files are not supplied by Wildfly 11.

Does anyone know how to switch on lazy loading ?

Thanks in advance,

Arkady.

[arkadyz]

My persistence.xml is:

<?xml version="1.0" encoding="UTF-8"?>

<persistence xmlns="http://java.sun.com/xml/ns/persistence"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"

version="1.0">

<persistence-unit name="nms">

<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>

<jta-data-source>java:/AllotDS</jta-data-source>

<jar-file>./NMS.ear/nms-catalog-ejb3.jar</jar-file>

<jar-file>./NMS.ear/nms-charging-system-ejb.jar</jar-file>

<jar-file>./NMS.ear/nms-config-ejb3.jar</jar-file>

<jar-file>./NMS.ear/nms-monitor-ejb3.jar</jar-file>

<jar-file>./NMS.ear/nms-topology-ejb3.jar</jar-file>

<jar-file>./NMS.ear/nms-collectors-ejb3.jar</jar-file>

<jar-file>./NMS.ear/nms-events-ejb3.jar</jar-file>

<jar-file>./NMS.ear/nms-admin-ejb3.jar</jar-file>

<jar-file>./NMS.ear/nms-npp-ejb3.jar</jar-file>

<jar-file>./NMS.ear/nms-sms-ejb3.jar</jar-file>

<jar-file>./NMS.ear/nms-policy-ejb3.jar</jar-file>

<jar-file>./NMS.ear/nms-common-enterprise-ejb3.jar</jar-file>

<properties>

<property name="hibernate.dialect" value="org.hibernate.dialect.SybaseDialect" />

</properties>

</persistence-unit>

</persistence>

[arkadyz]

To be clear, it always make EAGER-loading. No exceptions.

[dleszyk]

You've enhanced classes with Maven plugin, right? Or you've forgot to turn on deployment time enhacement with: hibernate.ejb.use_class_enhancer in persistence.xml.

[arkadyz]

Turning on hibernate.ejb.use_class_enhancer in persistence.xml didn't help. What do you mean "enhanced classes" ?

[dleszyk]

Please check this article https://vladmihalcea.com/the-best-way-to-map-a-onetoone-relationship-with-jpa-and-hibernate/ and the mentioning of Bytecode enhancement.

[arkadyz]

Thank, it helped me.