如何使用 EclipseLink 和 Spring 配置动态编织？现在我正试图通过一个 Junit 测试来让它工作，但我以后必须让它与 Tomcat 一起工作(我的部门已经标准化了大约 10 年)。

我遇到了两个主要问题:

1. Spring 想要一个加载时间编织器:

异常(exception):

java.lang.IllegalStateException: Failed to load ApplicationContext
    at org.springframework.test.context.TestContext.getApplicationContext(TestContext.java:181)
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:109)
<snip>
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.context.weaving.AspectJWeavingEnabler#0': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loadTimeWeaver': Initialization of bean failed; nested exception is java.lang.IllegalStateException: ClassLoader [sun.misc.Launcher$AppClassLoader] does NOT provide an 'addTransformer(ClassFileTransformer)' method. Specify a custom LoadTimeWeaver or start your Java virtual machine with Spring's agent: -javaagent:org.springframework.instrument.jar
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
<snip>
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loadTimeWeaver': Initialization of bean failed; nested exception is java.lang.IllegalStateException: ClassLoader [sun.misc.Launcher$AppClassLoader] does NOT provide an 'addTransformer(ClassFileTransformer)' method. Specify a custom LoadTimeWeaver or start your Java virtual machine with Spring's agent: -javaagent:org.springframework.instrument.jar
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
<snip>
Caused by: java.lang.IllegalStateException: ClassLoader [sun.misc.Launcher$AppClassLoader] does NOT provide an 'addTransformer(ClassFileTransformer)' method. Specify a custom LoadTimeWeaver or start your Java virtual machine with Spring's agent: -javaagent:org.springframework.instrument.jar
    at org.springframework.context.weaving.DefaultContextLoadTimeWeaver.setBeanClassLoader(DefaultContextLoadTimeWeaver.java:91)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods(AbstractAutowireCapableBeanFactory.java:1437)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1408)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    ... 44 more

我可以通过配置 Spring Instrumentation 来解决这个问题:

JVM parameter:
-javaagent:/path/to/org.springframework.instrument-3.1.0.M2.jar

<强>2。 Eclipselink 对 Spring Instrumentation 不满意:

错误:

(similar error messages repeated many times)

[EL Severe]: 2011-06-20 16:12:57.951--ServerSession(979781372)--Local Exception Stack: 
Exception [EclipseLink-0] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.IntegrityException
Descriptor Exceptions: 
---------------------------------------------------------

Exception [EclipseLink-60] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [_persistence_set_shellType_vh] or [_persistence_get_shellType_vh] is not defined in the object [ps.entity.JudicialArtifactFamily].
Internal Exception: java.lang.NoSuchMethodException: ps.entity.JudicialArtifactFamily._persistence_get_shellType_vh()
Mapping: org.eclipse.persistence.mappings.ManyToOneMapping[shellType]
Descriptor: RelationalDescriptor(ps.entity.JudicialArtifactFamily --> [DatabaseTable(JUDICIAL_ARTIFACT_FAMILY)])

Exception [EclipseLink-218] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: A NullPointerException would have occurred accessing a non-existent weaved _vh_ method [_persistence_get_shellType_vh].  The class was not weaved properly - for EE deployments, check the module order in the application.xml deployment descriptor and verify that the module containing the persistence unit is ahead of any other module that uses it.

我尝试通过使用 EclipseLink 编织器来解决这个问题:

-javaagent:/dev/tools/javaagents/eclipselink.jar

但是我从问题 #1 中得到了同样的异常。

库版本

我正在使用:

• Java 1.6.0_24
• EclipseLink 2.2.0.v20110202-r8913
• Spring 3.1.0 平方米

配置文件

这是我的 persistence.xml:

<persistence xmlns="http://java.sun.com/xml/ns/persistence" 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">
    <persistence-unit name="eclipseLinkHashPU" transaction-type="RESOURCE_LOCAL">
        <class>ps.entity.Artifact</class>
        <class>ps.entity.JudicialArtifactFamily</class>
        <class>ps.entity.ShellType</class>
        <class>ps.entity.SourceArtifact</class>
        <class>ps.entity.Health</class>
        <exclude-unlisted-classes>false</exclude-unlisted-classes>
        <properties>    
            <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
            <property name="eclipselink.ddl-generation.output-mode" value="database"/>
        </properties>
    </persistence-unit>
</persistence>

这是我的 application.xml:

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jaxrs="http://cxf.apache.org/schema/jaxrs" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:util="http://www.springframework.org/schema/util" xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/tx 
           http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://cxf.apache.org/schema/jaxrs
           http://cxf.apache.org/schema/jaxrs.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd          
           http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd
           http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd">

    <context:component-scan base-package="ps">
    </context:component-scan>

    <context:load-time-weaver/>

    <alias alias="entityManagerFactory" name="eclipseLinkEntityManagerFactory"/>

    <bean id="eclipseLinkEntityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="persistenceXmlLocation" value="classpath:eclipselink-persistence.xml" />
        <property name="persistenceUnitName" value="eclipseLinkHashPU" />
        <property name="jpaPropertyMap">
            <map>
                <entry key="eclipselink.logging.level" value="Severe"/>
                <entry key="eclipselink.target-database" value="org.eclipse.persistence.platform.database.oracle.OraclePlatform"/>
                <entry key="javax.persistence.nonJtaDataSource" value-ref="hash1DataSource"/>
                <!-- it's not good that I'm turning weaving off -->
                <!-- <entry key="eclipselink.weaving" value="false"/> -->
            </map>
        </property>
        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter">
                <property name="databasePlatform" value="oracle" />
                <property name="database" value="ORACLE" />
                <property name="generateDdl" value="true" />
                <property name="showSql" value="true" />
            </bean>
        </property>
    </bean>

    <!-- datasources, etc -->
</beans>

最佳答案

对于使用 Spring 进行编织，我相信您需要类似的东西，

<bean id="persistenceUnitManager" class="org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager">
    <property name="defaultDataSource" ref="dataSource" />
    <property name="dataSources">
        <map>
            <entry>
                <key>
                    <value>jdbc/__default</value>
                </key>
                <ref bean="dataSource" />
            </entry>
            <entry>
                <key>
                    <value>jdbc/jta</value>
                </key>
                <ref bean="dataSource" />
            </entry>
        </map>
    </property>
    <property name="loadTimeWeaver">
        <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
    </property>
</bean>

这里有一些信息，

http://wiki.eclipse.org/EclipseLink/Examples/JPA/JPASpring

确保您在访问 Spring 上下文之前没有访问您的类。

另一种解决方案是使用静态编织。

关于java - 如何使用 EclipseLink 和 Spring 配置动态编织？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6417863/