在drools工作台内部我创建了java类来获取entitymanager,我在drl文件中使用,但我的问题是
当我打电话给班级以获得像bellow
这样的实体经理时package demo.test;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.hibernate.jpa.HibernateEntityManagerFactory;
import org.hibernate.Session;
/**
* This class was automatically generated by the data modeler tool.
*/
public class Factory implements java.io.Serializable {
static final long serialVersionUID = 1L;
public Factory() {
}
public Session getSessionHibernate(){
HibernateEntityManagerFactory ha = (HibernateEntityManagerFactory) Persistence
.createEntityManagerFactory("flightdataunit");
EntityManager emf = ha.createEntityManager();
Session session = emf.unwrap(Session.class);
session.beginTransaction().begin();
return session;
}
}
和persistence.xml一样吼叫
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:orm="http://java.sun.com/xml/ns/persistence/orm" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_2_0.xsd">
<persistence-unit name="flightdataunit" transaction-type="JTA">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<jta-data-source>java:jboss/sqlserver/flightdata</jta-data-source>
<class>demo.test.Aircraftfleetdetail</class>
<class>demo.test.Flightdatacrew</class>
<class>demo.test.Airfield</class>
<class>demo.test.FlightdatacrewPK</class>
<class>demo.test.Flighttype</class>
<class>demo.test.Repository</class>
<class>demo.test.Seatconfig</class>
<class>demo.test.Aircraftidentity</class>
<class>demo.test.Place</class>
<class>demo.test.Flightdata</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.SQLServerDialect"/>
<property name="hibernate.max_fetch_depth" value="3"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
<property name="hibernate.show_sql" value="false"/>
<property name="hibernate.id.new_generator_mappings" value="false"/>
<property name="hibernate.transaction.jta.platform" value="org.hibernate.service.jta.platform.internal.JBossAppServerJtaPlatform"/>
</properties>
</persistence-unit>
</persistence>
和pom.xml一样
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>demo</groupId>
<artifactId>TEST</artifactId>
<version>1.0</version>
<name>TEST</name>
<dependencies>
<dependency>
<groupId>sqlserver</groupId>
<artifactId>jarfile</artifactId>
<version>4.0</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>1.0.0.Final</version>
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>1.0.2</version>
</dependency>
<dependency>
<groupId>antlr</groupId>
<artifactId>antlr</artifactId>
<version>2.7.6</version>
</dependency>
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.2.2</version>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>org.hibernate.common</groupId>
<artifactId>hibernate-commons-annotations</artifactId>
<version>5.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.1.0.Final</version>
</dependency>
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>jta</artifactId>
<version>1.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.kie</groupId>
<artifactId>kie-maven-plugin</artifactId>
<version>6.3.0.Final</version>
<extensions>true</extensions>
</plugin>
</plugins>
</build>
</project>
当我试图打电话给工厂课时我得到了 没有名为XXX的持久性提供程序
新工厂类
package demo.test;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.hibernate.jpa.HibernateEntityManagerFactory;
import org.hibernate.Session;
import javax.ejb.Stateless;
import javax.persistence.PersistenceContext;
/**
* This class was automatically generated by the data modeler tool.
*/
@Stateless
public class Factory implements java.io.Serializable {
static final long serialVersionUID = 1L;
@PersistenceContext(unitName ="flightdataunit")
EntityManager entityManager;
public Factory() {
}
public Session getSessionHibernate(){
Session session = entityManager.unwrap(Session.class);
return session;
}
}
答案 0 :(得分:0)
你混合了两件不同的东西。如果您使用的是Java EE兼容的应用程序服务器,则可以使用EntityManager
annoation实际注入@PeristenceContext
。如果您想使用JPA,请不要尝试创建hibernate会话(例如特定于供应商的实现),并且绝对不能自己启动事务 - 使用container managed transactions。
所以你需要
Factory
成为@Stateless
会话bean(或有状态,取决于使用情况)@PersistenceContext EntityManager em
em
的代码调用方法中,例如EntityManager 这是一个很好的资源,可以让你正确地走上正轨:http://www.tutorialspoint.com/ejb/ejb_persistence.htm