如何让容器管理事务（CMT）与EJB3.1、Hibernate3.6、JPA2.0、JBoss和MySQL一起工作_Jpa_Jboss_Ejb_Code Injection_Entitymanager

如何让容器管理事务（CMT）与EJB3.1、Hibernate3.6、JPA2.0、JBoss和MySQL一起工作

jpa jboss

如何让容器管理事务（CMT）与EJB3.1、Hibernate3.6、JPA2.0、JBoss和MySQL一起工作,jpa,jboss,ejb,code-injection,entitymanager,Jpa,Jboss,Ejb,Code Injection,Entitymanager,我试图让CMT与JPA EntityManager和EJB一起工作，但出现了以下错误。（堆栈恍惚状态被截断）：我的班级：访问会话Bean的Servlet： public class SearchActionExample extends Action { @EJB private static TestBeanServiceInterface testBean; public ActionForward execute(ActionMapping mapping,

我试图让CMT与JPA EntityManager和EJB一起工作，但出现了以下错误。（堆栈恍惚状态被截断）：

我的班级：

访问会话Bean的Servlet：

public class SearchActionExample extends Action {
    @EJB
    private static TestBeanServiceInterface testBean;

    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
        testBean.addSource("TEST SOURCE NAME", 88, 99);
        Service service = testBean.findService("HBA", "MEL");

        return mapping.findForward("success");
    }
}

远程接口：

@Remote
public interface TestBeanServiceInterface {
    // Source is my own custom entity
    void addSource(String sourceName, int newthreadsleeptime, int maxactivehttpclients);

    // Service is my own Custom entity    
    Service findService(String departureAirportCode, String arrivalAirportCode);
}

无状态会话Bean定义：

@Stateless
public class TestBeanService implements TestBeanServiceInterface {

    @PersistenceContext(unitName="mydomainJPA")
    private EntityManager em;

    public void addSource(String sourceName, int newthreadsleeptime, int maxactivehttpclients) {
        Source source = new Source();
        source.setName(sourceName);
        source.setNewThreadSleepTime(newthreadsleeptime);
        source.setMaxActiveHttpClients(maxactivehttpclients);
        em.persist(source);
    }
    public Service findService(String departureAirportCode, String arrivalAirportCode) {
        String queryString = "from Service where departureairportcode = '" + departureAirportCode + "' and arrivalairportcode = '" + arrivalAirportCode + "'";
        Service service = (Service)em.createQuery(queryString).getSingleResult();
        return service;
    }
}

文件persistence.xml：

<?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_2_0.xsd" version="2.0">
<persistence-unit name="mydomainJPA" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:/MySqlDS</jta-data-source>
    <class>com.mydomain.entities.Service</class>
<class>com.mydomain.entities.Source</class>
    <properties>
        <property name="hibernate.query.factory_class" value="org.hibernate.hql.classic.ClassicQueryTranslatorFactory"/>
        <property name="hibernate.archive.autodetection" value="class"/>
        <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
        <property name="hibernate.current_session_context_class" value="jta"/>   
    </properties>   
</persistence-unit>

<?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_2_0.xsd" version="2.0">
<persistence-unit name="PersistenceUnitNameInPersistenceXML" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:/MySqlDS</jta-data-source>
    <properties>
    </properties>   
</persistence-unit>

更新：

“本地”界面工作正常（即不必是远程的）

我通过在Eclipse中的一个企业应用程序项目中部署来实现它。web.xml、ejb-jar.xml或application.xml中不需要引用bean

EAR中部署到Jboss的application.xml的内容：

<?xml version="1.0" encoding="UTF-8"?>
<application xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:application="http://java.sun.com/xml/ns/javaee/application_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application_6.xsd" id="Application_ID" version="6">
<display-name>myprojects</display-name>
<module>
<web>
<web-uri>myproject.war</web-uri>
<context-root>myproject</context-root>
</web>
</module>
<module>
<ejb>myprojectsEJB.jar</ejb>
</module>
</application>

<?xml version="1.0" encoding="UTF-8"?>
<application xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:application="http://java.sun.com/xml/ns/javaee/application_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application_6.xsd" id="Application_ID" version="6">
    <display-name>myprojects</display-name>
    <module>
        <web>
            <web-uri>myproject.war</web-uri>
            <context-root>myproject</context-root>
        </web>
    </module>
    <module>
        <ejb>myprojectsEJB.jar</ejb>
    </module>
</application>

接口类：

@Local
public interface SessionBeanLocal {

TestTiger addTestTiger(String testTigerName);

package com.myproject.beans;
import javax.ejb.Local;

import com.myproject.entities.Lion;

@Local
public interface SessionBeanLocal {
Lion addLion(String lionName);
}

最重要的改变是：在保存会话的类中，这个类是局部变量，容器（JBoss AS）需要一个设置来创建bean：

@EJB()
private TestBean3Local beanVariable;

public void setBeanVariable(TestBean3Local beanVariable) {
    System.out.println("=====\n\nSET BEAN VARIABE SETTER WAS CALLED. (BY CONTAINER?)  \n\n=======");
    this.beanVariable = beanVariable;
}

@EJB()
private SessionBeanLocal bean;

public void setBean(SessionBeanLocal bean) {
    System.out.println("setBean setter was called by container (e.g. Jboss)");
    this.bean = bean;
}

public exampleStrutsServletMethod(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
    PrintWriter out = response.getWriter();

    Lion lion = bean.addLion("Simba");  // this will persist the Lion within the persistence-context (and auto-generate an Id), and the container will manage when it's flushed to the database

    out.print("<html>LION ID = " + lion.getLionId() + "<html>");
}

您需要注入远程接口，而不是Bean

public class SearchActionExample extends Action {
    @EJB
    private static TestBean2Remote testBean;

您需要注入远程接口，而不是Bean

public class SearchActionExample extends Action {
    @EJB
    private static TestBean2Remote testBean;

不要对静态字段进行注入，注入是实例成员，在创建对象时发生，而静态字段是类成员。这很可能是异常的原因

不要对静态字段进行注入，注入是实例成员，在创建对象时发生，而静态字段是类成员。这很可能是异常的原因。

我已经得到了一个有效的解决方案：

@本地接口工作正常（即不必是远程接口）

web.xml、ejb-jar.xml、application.xml或任何jboss配置文件中都不需要引用bean

我是通过在Eclipse中的“企业应用程序项目”（EAP）中部署来实现的。此项目包含“部署程序集”，其中包含包含JPA实体类的.jar，以及另一个包含其他业务逻辑类的.jar。EAP有这两个项目，加上EJB项目和“动态Web项目”（创建一个.war），在其构建路径上总共有4个项目。Eclipse中的Jboss AS工具将EAP发布/部署到Jboss服务器。部署到Jboss的EAP中application.xml的内容：

<?xml version="1.0" encoding="UTF-8"?>
<application xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:application="http://java.sun.com/xml/ns/javaee/application_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application_6.xsd" id="Application_ID" version="6">
<display-name>myprojects</display-name>
<module>
<web>
<web-uri>myproject.war</web-uri>
<context-root>myproject</context-root>
</web>
</module>
<module>
<ejb>myprojectsEJB.jar</ejb>
</module>
</application>

<?xml version="1.0" encoding="UTF-8"?>
<application xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:application="http://java.sun.com/xml/ns/javaee/application_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application_6.xsd" id="Application_ID" version="6">
    <display-name>myprojects</display-name>
    <module>
        <web>
            <web-uri>myproject.war</web-uri>
            <context-root>myproject</context-root>
        </web>
    </module>
    <module>
        <ejb>myprojectsEJB.jar</ejb>
    </module>
</application>

SessionBean类：

@Stateless
@Local(SessionBeanLocal.class)

public class SessionBean implements SessionBeanLocal {

@PersistenceContext(unitName="JPAtestProjectPersistenceUnit")
private EntityManager em;

package com.myproject.beans;

import javax.ejb.Local;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import com.myproject.Lion;

@Stateless
@Local(SessionBeanLocal.class)
public class SessionBean implements SessionBeanLocal {

@PersistenceContext(unitName="PersistenceUnitNameInPersistenceXML")
private EntityManager em;

public Lion addLion(String lionName) {
    Lion lion = new Lion(lionName);
    em.persist(lion);
}

最重要的改变是：在保存会话变量的类中（例如，在Struts action servlet中，但可以是任何servlet），容器（JBoss AS）需要一个setter方法来创建bean：

@EJB()
private TestBean3Local beanVariable;

public void setBeanVariable(TestBean3Local beanVariable) {
    System.out.println("=====\n\nSET BEAN VARIABE SETTER WAS CALLED. (BY CONTAINER?)  \n\n=======");
    this.beanVariable = beanVariable;
}

@EJB()
private SessionBeanLocal bean;

public void setBean(SessionBeanLocal bean) {
    System.out.println("setBean setter was called by container (e.g. Jboss)");
    this.bean = bean;
}

public exampleStrutsServletMethod(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
    PrintWriter out = response.getWriter();

    Lion lion = bean.addLion("Simba");  // this will persist the Lion within the persistence-context (and auto-generate an Id), and the container will manage when it's flushed to the database

    out.print("<html>LION ID = " + lion.getLionId() + "<html>");
}

@EJB（）
私有会话bean本地bean；
public void setBean（sessionbeanlocalbean）{
System.out.println（“容器（例如Jboss）调用了setBean setter）”；
this.bean=bean；
}
public exampleStrutsServletMethod（ActionMapping映射、ActionForm表单、HttpServletRequest请求、HttpServletResponse响应）引发异常{
PrintWriter out=response.getWriter（）；
Lion Lion=bean.addLion（“Simba”）；//这将在持久化上下文中持久化Lion（并自动生成一个Id），容器将在它刷新到数据库时进行管理
out.print（“LION ID=“+LION.getLionId（）+”）；
}

文件persistence.xml：

<?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_2_0.xsd" version="2.0">
<persistence-unit name="mydomainJPA" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:/MySqlDS</jta-data-source>
    <class>com.mydomain.entities.Service</class>
<class>com.mydomain.entities.Source</class>
    <properties>
        <property name="hibernate.query.factory_class" value="org.hibernate.hql.classic.ClassicQueryTranslatorFactory"/>
        <property name="hibernate.archive.autodetection" value="class"/>
        <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
        <property name="hibernate.current_session_context_class" value="jta"/>   
    </properties>   
</persistence-unit>

<?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_2_0.xsd" version="2.0">
<persistence-unit name="PersistenceUnitNameInPersistenceXML" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:/MySqlDS</jta-data-source>
    <properties>
    </properties>   
</persistence-unit>


org.hibernate.ejb.HibernatePersistence
java:/MySqlDS

mysql-dx.xml（在jboss server dir/server/default/deploy目录中）：


MySqlDS
jdbc：mysql://localhost:3306/myProjectDatabase
com.mysql.jdbc.Driver
用户名
我的密码
org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter
mySQL

注意：如果Eclipse JPA项目（即包含JPA 2.0实体类和persistence.xml的项目）的“Java persistence”项目属性面板中的“persistence class Management”设置为“自动发现带注释的类”，则不需要在persistence.xml中定义类（通过“”）

注意：此解决方案基于：EJB3.1、Eclipse Helios SR2、Hibernate 3.6、JPA 2.0、JBoss 6、MySQL 5.5.10

注：关于“容器管理事务”（CMT）。Hibernate手册引用了它们，并指出需要将persistence.xml属性（如“Hibernate.transaction.factory_class”）设置为值：“org.Hibernate.transaction.CMTTransactionFactory”。如果使用JPA EntityManager而不是本机hibernate，则情况并非如此。我在persistence.xml中不需要任何这样的定制CMT属性。这就是Hibernate在两种实现方式（即SessionFactory和EntityManager）之间混淆的地方。请随时对我的解决方案的这一部分发表更多意见，因为我仍在绞尽脑汁！Will

我已经获得了一个有效的解决方案：

@本地接口工作正常（即不必是远程接口）

web.xml、ejb-jar.xml、application.xml或任何jboss配置文件中都不需要引用bean

<?xml version="1.0" encoding="UTF-8"?>
<application xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:application="http://java.sun.com/xml/ns/javaee/application_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application_6.xsd" id="Application_ID" version="6">
<display-name>myprojects</display-name>
<module>
<web>
<web-uri>myproject.war</web-uri>
<context-root>myproject</context-root>
</web>
</module>
<module>
<ejb>myprojectsEJB.jar</ejb>
</module>
</application>

<?xml version="1.0" encoding="UTF-8"?>
<application xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:application="http://java.sun.com/xml/ns/javaee/application_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application_6.xsd" id="Application_ID" version="6">
    <display-name>myprojects</display-name>
    <module>
        <web>
            <web-uri>myproject.war</web-uri>
            <context-root>myproject</context-root>
        </web>
    </module>
    <module>
        <ejb>myprojectsEJB.jar</ejb>
    </module>
</application>

SessionBean类：

@Stateless
@Local(SessionBeanLocal.class)

public class SessionBean implements SessionBeanLocal {

@PersistenceContext(unitName="JPAtestProjectPersistenceUnit")
private EntityManager em;

package com.myproject.beans;

import javax.ejb.Local;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import com.myproject.Lion;

@Stateless
@Local(SessionBeanLocal.class)
public class SessionBean implements SessionBeanLocal {

@PersistenceContext(unitName="PersistenceUnitNameInPersistenceXML")
private EntityManager em;

public Lion addLion(String lionName) {
    Lion lion = new Lion(lionName);
    em.persist(lion);
}

最重要的改变是：在保存会话变量的类中（例如，在Struts action servlet中，但可以是任何servlet），容器（JBoss AS）需要一个setter方法来创建bean：

@EJB()
private TestBean3Local beanVariable;

public void setBeanVariable(TestBean3Local beanVariable) {
    System.out.println("=====\n\nSET BEAN VARIABE SETTER WAS CALLED. (BY CONTAINER?)  \n\n=======");
    this.beanVariable = beanVariable;
}

@EJB()
private SessionBeanLocal bean;

public void setBean(SessionBeanLocal bean) {
    System.out.println("setBean setter was called by container (e.g. Jboss)");
    this.bean = bean;
}

public exampleStrutsServletMethod(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
    PrintWriter out = response.getWriter();

    Lion lion = bean.addLion("Simba");  // this will persist the Lion within the persistence-context (and auto-generate an Id), and the container will manage when it's flushed to the database

    out.print("<html>LION ID = " + lion.getLionId() + "<html>");
}

@EJB（）
私有会话bean本地bean；
public void setBean（sessionbeanlocalbean）{
System.out.println（“setB