[英]hibernate, mysql, glassfish v3, and JTA datasource
我正在嘗試使用mysql和glassfish的hibernate實體管理器。 嘗試使用JTA數據源時出現以下錯誤:
Caused by: org.hibernate.HibernateException: The chosen transaction strategy requires access to the JTA TransactionManager
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:376)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1367)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:858)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:733)
... 37 more
以下是我配置persistence.xml的方法
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" 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">
<persistence-unit name="myPU" transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>jdbc/mysql</jta-data-source>
<class>com.my.shared.entity.MyFile</class>
<class>com.my.shared.entity.MyRole</class>
<class>com.my.shared.entity.MyUser</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
<property name="hibernate.show.sql" value="true" />
</properties>
但是,當我配置非jta數據源時,它工作正常
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" 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">
<persistence-unit name="myPU" transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<non-jta-data-source>jdbc/mysql</non-jta-data-source>
<class>com.my.shared.entity.MyFile</class>
<class>com.my.shared.entity.MyRole</class>
<class>com.my.shared.entity.MyUser</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
<property name="hibernate.show.sql" value="true" />
</properties>
</persistence-unit>
</persistence>
這一切都很好,但我真的想用:
em.persist(myObject);
代替:
em.getTransaction().begin();
em.persist(myObject);
em.getTransaction().commit();
我是否遺漏了使用hibernate配置的內容,或者甚至可以使用JTA數據源?
對於您的配置,默認情況下使用容器管理的事務。 在這種情況下,您需要定義一種事務同步方式,以便通知持久層(例如,可以更新二級緩存)。 因此,您需要定義manager_lookup_class
屬性,如下所示:
// For GlassFish:
hibernate.transaction.manager_lookup_class=org.hibernate.transaction.SunONETransactionManagerLookup
// For WebSpere:
hibernate.transaction.manager_lookup_class=org.hibernate.transaction.WebSphereExtendedJTATransactionLookup
// For JBoss:
hibernate.transaction.manager_lookup_class=org.hibernate.transaction.JBossTransactionManagerLookup
// For OpenEJB:
hibernate.transaction.manager_lookup_class=org.apache.openejb.hibernate.TransactionManagerLookup
此外,您必須將訪問數據層的業務方法標記為“事務性”。 為此,您需要使用@javax.ejb.TransactionAttribute(REQUIRED)
標記它們@javax.ejb.TransactionAttribute(REQUIRED)
有關此批注的更多信息,請參見此處 )。
您還可以選擇切換到Bean管理的事務。 你可以這樣說:
hibernate.transaction.factory_class=org.hibernate.transaction.JTATransactionFactory
然后bean負責開始/結束事務:
org.hibernate.Session session = ...;
org.hibernate.Transaction tx = null;
try {
tx = session.beginTransaction();
session.createQuery(...); // do some staff
tx.commit();
} catch (HibernateException e)
{
if (tx != null) {
tx.rollback();
}
}
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