如何使用EclipseLink和Spring配置動態編織？

Question

如何使用EclipseLink和Spring配置動態編織？ 現在，我正在嘗試使它與Junit測試一起使用，但是稍后我將不得不使其與Tomcat一起使用（我的部門已經對其進行了10年的標准化）。

我遇到兩個主要問題：

1. Spring需要一個加載時間編織器：

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

我可以通過配置Spring Instrumentation來解決此問題：

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

2. Eclipselink對Spring Instrumentation不滿意：

錯誤：

(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.

我試圖通過使用EclipseLink weaver來解決此問題：

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

但是然后我從問題1中得到了相同的例外。

庫版本

我在用：

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

配置文件

這是我的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>

這是我的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進行編織，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>

這里有一些信息，

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

確保在訪問Spring上下文之前沒有訪問您的類。

另一種解決方案是使用靜態編織。

Answer 2

現在，我還使用EclipseLink 2.2和Spring 3.1 ，如下所示。 我的配置與您的配置有些不同。 沒有loadTimeWeaver在配置eclipseLinkEntityManagerFactory 。 我認為，按以下方式使用可以。

請按照以下說明嘗試使用您的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

將org.springframework.instrument-3.1.0.M2.jar復制到tomcat/lib目錄中，然后重試。

Answer 4

考慮到單元測試的工具，可以將其作為VM參數添加到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>

假設將彈簧儀器罐放在相應的位置。

（為此，可以將以下依賴項臨時添加到項目pom.xml中。

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

然后在構建之后，將相應的工件從本地.m2目錄復制到項目的lib / test目錄。）