如何使用EclipseLink和Spring配置动态编织？

Question

如何使用EclipseLink和Spring配置动态编织？ 现在，我正在尝试使它与Junit测试一起使用，但是稍后我将不得不使其与Tomcat一起使用（我的部门已经对其进行了10年的标准化）。

我遇到两个主要问题：

1. Spring需要一个加载时间编织器：

例外：

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来解决此问题：

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

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.

我试图通过使用EclipseLink weaver来解决此问题：

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

但是然后我从问题1中得到了相同的例外。

库版本

我在用：

• Java 1.6.0_24
• EclipseLink 2.2.0.v20110202-r8913
• 春季3.1.0 M2

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>

Answer 1

我相信要使用Spring进行编织，您需要

<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。

Answer 2

现在，我还使用EclipseLink 2.2和Spring 3.1 ，如下所示。 我的配置与您的配置有些不同。 没有loadTimeWeaver在配置eclipseLinkEntityManagerFactory 。 我认为，按以下方式使用可以。

请按照以下说明尝试使用您的Oracle DB信息。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:faces="http://www.springframework.org/schema/faces"
       xmlns:int-security="http://www.springframework.org/schema/integration/security"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:sec="http://www.springframework.org/schema/security"
       xmlns:util="http://www.springframework.org/schema/util"
       xsi:schemaLocation="http://www.springframework.org/schema/integration/security http://www.springframework.org/schema/integration/security/spring-integration-security-2.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
        http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.0.xsd
        http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/faces http://www.springframework.org/schema/faces/spring-faces-2.0.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">

    <context:annotation-config/>    
    <context:component-scan base-package="your-package"/>
    <tx:annotation-driven transaction-manager="transactionManager" />
    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="your-driver"/>
        <property name="url" value="your-database-url"/>
        <property name="username" value="your-username"/>
        <property name="password" value="your-passowrd"/>
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
    </bean>

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<!--        <property name="dataSource" ref="dataSource"/>-->
        <property name="persistenceUnitName" value="your-persistence-unit-name"/>
        <property name="jpaVendorAdapter" ref="jpaVendorAdapter"/>
        <property name="jpaDialect">
            <bean class="org.springframework.orm.jpa.vendor.EclipseLinkJpaDialect"/>
        </property>
        <property name="jpaPropertyMap">
            <props>
                <prop key="eclipselink.weaving">false</prop>
            </props>
        </property>

        <property name="loadTimeWeaver">
            <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver">
            </bean>
        </property>
    </bean>

    <bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter">
        <property name="databasePlatform" value="org.eclipse.persistence.platform.database.OraclePlatform" />
        <property name="generateDdl" value="false"/>
        <property name="showSql" value="true"/>
    </bean>
</beans>

Answer 3

将org.springframework.instrument-3.1.0.M2.jar复制到tomcat/lib目录中，然后重试。

Answer 4

考虑到单元测试的工具，可以将其作为VM参数添加到maven-surefire-plugin

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <configuration>
        <argLine>-javaagent:lib/test/spring-instrument-4.0.2.RELEASE.jar</argLine>
    </configuration>
</plugin>

假设将弹簧仪器罐放在相应的位置。

（为此，可以将以下依赖项临时添加到项目pom.xml中。

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-instrument</artifactId>
    <scope>test</scope>
</dependency>

然后在构建之后，将相应的工件从本地.m2目录复制到项目的lib / test目录。）