JBoss7.1.0:在子部署中找不到名为null的持久性单元 [英] JBoss7.1.0: Can't find a persistence unit named null in subdeployment
问题描述
我有一个包含3个模块的项目:factory-ear，factory-ejb和factory-web.它以EAR的形式部署到JBoss7，其中包含ejb.jar和web.war. 当我尝试在EJB类中获取EntityManager时
I have a project with 3 modules inside: factory-ear, factory-ejb and factory-web. It deployed to JBoss7 as EAR with ejb.jar and web.war inside. When I trying to get EntityManager in my EJB class
@PersistenceContext(unitName = "manager1")
private EntityManager em;
我遇到错误
JBAS011440:在子部署中找不到名为manager1的持久性单元 部署"factory.ear"的"factory-ejb-1.0-SNAPSHOT.jar"
JBAS011440: Can't find a persistence unit named manager1 in subdeployment "factory-ejb-1.0-SNAPSHOT.jar" of deployment "factory.ear"
我的persistence.xml
My persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
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_2_0.xsd">
<persistence-unit name="manager1" transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:jboss/datasources/PostgresDS</jta-data-source>
<class>com.test.model.Car</class>
<class>com.test.model.Engine</class>
<class>com.test.model.Body</class>
<class>com.test.model.Transmission</class>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.hbm2ddl.auto" value="update"/>
</properties>
</persistence-unit>
</persistence>
persistence.xml位于app_name/factory_ear/META-INF中.
The persistence.xml is in the app_name/factory_ear/META-INF.
我已经读到这可能是类加载器的问题.我具有相同的JPA API依赖关系，并且在Ear和Web模块中提供了作用域
I have read that this can be a problem of classloaders. I have same JPA API dependency with provided scope in ear and web modules
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<scope>provided</scope>
</dependency>
但是我无法删除其中一个.两者都是构建所必需的.
But I was not able to remove one of them. Both are necessary for build.
Body.java
Body.java
@Entity
@Table(name = "body")
public class Body {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Integer id;
@Column(name = "type")
private String type;
@Column(name = "color")
private String color;
@Column(name = "doors_num")
private Integer doorsNumber;
@Column(name = "vin")
private Integer vin;
@OneToMany(mappedBy = "body")
private Set<Car> cars;
/**
* @return the id
*/
public Integer getId() {
return id;
}
/**
* @param id the id to set
*/
public void setId(Integer id) {
this.id = id;
}
/**
* @return the type
*/
public String getType() {
return type;
}
/**
* @param type the type to set
*/
public void setType(String type) {
this.type = type;
}
/**
* @return the color
*/
public String getColor() {
return color;
}
/**
* @param color the color to set
*/
public void setColor(String color) {
this.color = color;
}
/**
* @return the doorsNumber
*/
public Integer getDoorsNumber() {
return doorsNumber;
}
/**
* @param doorsNumber the doorsNumber to set
*/
public void setDoorsNumber(Integer doorsNumber) {
this.doorsNumber = doorsNumber;
}
/**
* @return the vin
*/
public Integer getVin() {
return vin;
}
/**
* @param vin the vin to set
*/
public void setVin(Integer vin) {
this.vin = vin;
}
/**
* @return the cars
*/
public Set<Car> getCars() {
return cars;
}
/**
* @param cars the cars to set
*/
public void setCars(Set<Car> cars) {
this.cars = cars;
}
}
Car.java
public class Car {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Integer id;
@Column(name = "model")
private String model;
@ManyToOne
@JoinColumn(name = "engine_id")
private Engine engine;
@ManyToOne
@JoinColumn(name = "body_id")
private Body body;
@ManyToOne
@JoinColumn(name = "transmission_id")
private Transmission transmission;
/**
* @return the id
*/
public Integer getId() {
return id;
}
/**
* @param id the id to set
*/
public void setId(Integer id) {
this.id = id;
}
/**
* @return the model
*/
public String getModel() {
return model;
}
/**
* @param model the model to set
*/
public void setModel(String model) {
this.model = model;
}
/**
* @return the engine
*/
public Engine getEngine() {
return engine;
}
/**
* @param engine the engine to set
*/
public void setEngine(Engine engine) {
this.engine = engine;
}
/**
* @return the body
*/
public Body getBody() {
return body;
}
/**
* @param body the body to set
*/
public void setBody(Body body) {
this.body = body;
}
/**
* @return the transmission
*/
public Transmission getTransmission() {
return transmission;
}
/**
* @param transmission the transmission to set
*/
public void setTransmission(Transmission transmission) {
this.transmission = transmission;
}
}
推荐答案
此问题不是由您的maven依赖引起的.
This problem is not caused by your maven dependencies.
任何类加载器通常都无法访问EAR文件中META-INF目录的内容.
The content of the META-INF directory in an EAR file is generally inaccessible to any class loader.
因此，您不能将persistence.xml文件放在EAR文件的META-INF目录中.而是将其移动到EJB jar文件的META-INF目录中.
Therefore, you cannot put your persistence.xml file in the META-INF directory of the EAR file. Move it into the META-INF directory of the EJB jar file instead.
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