如何在Hibernate中使用TomEE

Question

我创建了一个非常简单的应用程序,使用持久化上下文(hibernate as provider)从数据库中读取一些值.我将Eclipse与Maven一起使用.

首先,我明白了

Caused by: org.apache.openejb.OpenEJBException: java.lang.ClassCastException: org.hibernate.ejb.HibernatePersistence cannot be cast to javax.persistence.spi.PersistenceProvider:

并根据这个主题 http://openejb.979440.n4.nabble.com/problem-with-hibernate-persistence-provider-td980429.html 我排除了hibernate-jpa-2.0-api.现在,我的依赖项看起来

<dependency>
 <groupId>postgresql</groupId>
 <artifactId>postgresql</artifactId>
 <version>9.1-901.jdbc4</version>
</dependency>

<dependency>
 <groupId>org.hibernate</groupId>
 <artifactId>hibernate-entitymanager</artifactId>
 <version>4.1.3.Final</version>
  <exclusions>
    <exclusion>
      <groupId>org.hibernate.javax.persistence</groupId>
      <artifactId>hibernate-jpa-2.0-api</artifactId>
    </exclusion>
  </exclusions>
</dependency>

现在,我不知道为什么......

Caused by: java.lang.ClassNotFoundException: org.hibernate.transaction.TransactionManagerLookup

但是TransactionManagerLookup处于hibernate核心.请问,任何人都可以告诉我,在TomEE中如何看待pom.xml使用hibernate？

Answer 1

1.将所需的Hibernate .jars复制到 <tomee-home>/lib

根据文档(http://tomee.apache.org/tomee-and-hibernate.html),以下内容就足够了,实际上它们对我有用:

<tomee-home>/lib/antlr-2.7.7.jar
<tomee-home>/lib/dom4j-1.6.1.jar
<tomee-home>/lib/hibernate-commons-annotations-4.0.2.Final.jar
<tomee-home>/lib/hibernate-core-4.2.21.Final.jar
<tomee-home>/lib/hibernate-entitymanager-4.2.21.Final.jar
<tomee-home>/lib/hibernate-validator-4.3.2.Final.jar
<tomee-home>/lib/javassist-3.18.1-GA.jar
<tomee-home>/lib/jboss-logging-3.1.0.GA.jar

所有这些.jars都包含在Hibernate ORM 4.2.x下载(http://hibernate.org/orm/)中,但Hibernate Validator除外,它是一个单独的下载(http://hibernate.org/validator/).

2.编辑您的pom.xml

使用javaee-api范围内的maven工件provided现在可以在项目中使用JPA规范.但是,如果您以前使用过一些特定于Hibernate的特性,类或注释,您仍然可以在您的Hibernate中引用Hibernate pom.xml来匹配这些依赖项:

<!-- JPA spec (required) -->
<dependencies>
    <dependency>
    <groupId>org.apache.openejb</groupId>
    <artifactId>javaee-api</artifactId>
    <version>6.0-4</version>
    <scope>provided</scope>
</dependency>
<!-- Hibernate specific features (only if needed) -->
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>4.2.21.Final</version>
    <scope>provided</scope>
</dependency>

3.定义数据库连接

编辑<tomee-home>/conf/tomee.xml:

<Resource id="myJtaDatabase" type="DataSource">
    JdbcDriver  com.mysql.jdbc.Driver
    JdbcUrl jdbc:mysql://localhost:3306/my_dbname?autoReconnect=true
    UserName foo
    Password bar
    validationQuery = SELECT 1
    JtaManaged true
</Resource>

您也可以将上述<Resource>...</Resource>定义放入WEB-INF/resources.xml并随应用程序一起发货:

<?xml version="1.0" encoding="UTF-8"?>
<resources>
    <!-- Put <Resource> elements here -->
<resources>

4. JTA数据源

既然您告诉TomEE如何建立连接,请在/src/main/java/META-INF/persistence.xml以下位置定义JTA数据源:

<?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="my_persistence_unit">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <jta-data-source>java:openejb/Resource/myJtaDatabase</jta-data-source>
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
            <!-- As many hibernate properties as you need, some examples: -->
            <property name="hibernate.show_sql" value="false" />
            <property name="hibernate.format_sql" value="true" />
            <!-- Drop and then re-create the database schema (don't do this in production) -->
            <property name="hibernate.hbm2ddl.auto" value="update" />
        </properties>
    </persistence-unit>
</persistence>

5.开始使用JPA

EntityManager在CDI bean或EJB中获取如下:

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

最后的笔记

Hibernate版本4.3+

我正在使用Hibernate 4.2.21(JPA 2.0,Java EE 6)和TomEE 1.7.2.任何TomEE 1.7.x,1.6.x和1.5.x都可以使用.但是,您不能使用Hibernate 4.3+(JPA 2.1/Java EE 7),因为TomEE 1.7.x及更低版本仅支持Java EE 6.如果您确实希望将Java EE 7功能与TomEE一起使用,则此博客文章可能会有所帮助:http://rmannibucau.wordpress.com/2013/07/19/little-tip-to-help-you-to-test-javaee-7-in-tomee-with-tomee-maven-plugin/

TomEE 1.5.x

TomEE 1.5.x已包含一个javassist-<version>.jar,因此您无需复制一个.

Answer 2

尝试这个：

添加：

• <tomee-home>/lib/antlr-2.7.7.jar
• <tomee-home>/lib/dom4j-1.6.1.jar
• <tomee-home>/lib/ehcache-core-2.5.1.jar
• <tomee-home>/lib/ehcache-terracotta-2.5.1.jar
• <tomee-home>/lib/hibernate-commons-annotations-4.0.1.Final.jar
• <tomee-home>/lib/hibernate-core-4.1.4.Final.jar
• <tomee-home>/lib/hibernate-ehcache-4.1.4.Final.jar
• <tomee-home>/lib/hibernate-entitymanager-4.1.4.Final.jar
• <tomee-home>/lib/hibernate-validator-4.3.0.Final.jar
• <tomee-home>/lib/jboss-logging-3.1.0.GA.jar
• <tomee-home>/lib/terracotta-toolkit-1.4-runtime-4.1.0.jar

ehcache jar 可能是可选的，但没有尝试过没有它们。

删除（可选）：

• <tomee-home>/lib/asm-3.2.jar
• <tomee-home>/lib/bval-core-0.4.jar
• <tomee-home>/lib/bval-jsr303-0.4.jar
• <tomee-home>/lib/commons-lang-2.6.jar
• <tomee-home>/lib/openjpa-2.2.0.jar
• <tomee-home>/lib/serp-1.13.1.jar