spring – Equinox(OSGi)和JPA / Hibernate – 寻找实体
作者：互联网
我试图在OSGi(Equinox)环境中使用Hibernate / Spring.如果我明确地将它指向Persistence.xml中的Entity类,它的效果很好：
<class>com.es.t.eee.domain.StuffSource</class>
<class>com.es.t.eee.domain.PostalAddress</class>
我想要的是让Hibernate“找到”所有的Entity类,就像在OSGi环境之外一样.
Hibernate正在寻找@Entities的正确包：
Searching mapped entities in jar/par: bundleresource://34/
WARN 27-07 15:30:24,235 (InputStreamZippedJarVisitor.java:doProcessElements:41):
Unable to find file (ignored): bundleresource://34/
它看起来应该可以正常工作,但是当它在Bundle Jar中查找@Entities时会发生异常,我不知道为什么.我已经包含了Hibernate正在吐出的日志的重要部分.
有没有人有任何想法我做错了什么或这里的问题是什么？
我在用：
> Hibernate Core 3.3.0.SP1
> Hibernate Annotations 3.4.0.GA
> Hibernate Commons Annotations 3.1.0.GA
> Hibernate EntityManager 3.4.0.GA
> Equinox 3.4
> Spring Dynamic Modules 1.2.0
这是Hibernate解析Persistence.xml的地方
INFO 27-07 15:30:24,110 (Version.java:<clinit>:15):
Hibernate Annotations 3.4.0.GA
INFO 27-07 15:30:24,110 (Environment.java:<clinit>:543):
Hibernate 3.3.0.SP1
INFO 27-07 15:30:24,110 (Environment.java:<clinit>:576):
hibernate.properties not found
INFO 27-07 15:30:24,126 (Environment.java:buildBytecodeProvider:709):
Bytecode provider name : javassist
INFO 27-07 15:30:24,126 (Environment.java:<clinit>:627):
using JDK 1.4 java.sql.Timestamp handling
INFO 27-07 15:30:24,157 (Version.java:<clinit>:14):
Hibernate Commons Annotations 3.1.0.GA
INFO 27-07 15:30:24,157 (Version.java:<clinit>:16):
Hibernate EntityManager 3.4.0.GA
DEBUG 27-07 15:30:24,219 (Ejb3Configuration.java:configure:312):
Processing PersistenceUnitInfo [
name: unit.postgresql
persistence provider classname: null
classloader: BundleDelegatingClassLoader for [DatabaseObjects (DatabaseObjects)]
Temporary classloader: org.springframework.instrument.classloading.SimpleThrowawayClassLoader@11b50a1
excludeUnlistedClasses: true
JTA datasource: null
Non JTA datasource: com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 1000, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName -> 1012f6d821goxcok12zcw86|174f02c, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> org.postgresql.Driver, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> 1012f6d821goxcok12zcw86|174f02c, idleConnectionTestPeriod -> 0, initialPoolSize -> 5, jdbcUrl -> jdbc:postgresql://localhost:5432/test2, lastAcquisitionFailureDefaultUser -> null, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 0, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 100, maxStatements -> 100, maxStatementsPerConnection -> 0, minPoolSize -> 3, numHelperThreads -> 3, numThreadsAwaitingCheckoutDefaultUser -> 0, preferredTestQuery -> null, properties -> {user=******, password=******}, propertyCycle -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false ]
Transaction type: RESOURCE_LOCAL
PU root URL: bundleresource://34/
Jar files URLs []
Managed classes names []
Mapping files names []
Properties [
hibernate.default_batch_fetch_size: 500
hibernate.cache.provider_class: net.sf.ehcache.hibernate.EhCacheProvider
hibernate.dialect: org.hibernate.dialect.PostgreSQLDialect
hibernate.max_fetch_depth: 5
hibernate.query.factory_class: org.hibernate.hql.ast.ASTQueryTranslatorFactory
hibernate.format_sql: false
hibernate.jdbc.batch_size: 1000
hibernate.use_outer_join: true
hibernate.archive.autodetection: class
hibernate.show_sql: false
hibernate.bytecode.provider: cglib]
这是发生错误的地方,因为它试图找到实体：
DEBUG 27-07 15:30:24,235 (Ejb3Configuration.java:getDetectedArtifacts:562):
Detect class: true; detect hbm: false
DEBUG 27-07 15:30:24,235 (Ejb3Configuration.java:getDetectedArtifacts:562):
Detect class: true; detect hbm: false
DEBUG 27-07 15:30:24,235 (AbstractJarVisitor.java:unqualify:116):
Searching mapped entities in jar/par: bundleresource://34/
WARN 27-07 15:30:24,235 (InputStreamZippedJarVisitor.java:doProcessElements:41):
Unable to find file (ignored): bundleresource://34/
java.lang.NullPointerException: in is null
at java.util.zip.ZipInputStream.<init>(Unknown Source)
at java.util.jar.JarInputStream.<init>(Unknown Source)
at java.util.jar.JarInputStream.<init>(Unknown Source)
at org.hibernate.ejb.packaging.InputStreamZippedJarVisitor.doProcessElements(InputStreamZippedJarVisitor.java:37)
at org.hibernate.ejb.packaging.AbstractJarVisitor.getMatchingEntries(AbstractJarVisitor.java:139)
at org.hibernate.ejb.Ejb3Configuration.addScannedEntries(Ejb3Configuration.java:287)
at org.hibernate.ejb.Ejb3Configuration.scanForClasses(Ejb3Configuration.java:614)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:360)
at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:131)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:224)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:291)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1369)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.AbstractBeanFactory.isSingleton(AbstractBeanFactory.java:366)
at org.springframework.osgi.service.exporter.support.OsgiServiceFactoryBean.afterPropertiesSet(OsgiServiceFactoryBean.java:235)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1369)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:423)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.completeRefresh(AbstractDelegatedExecutionApplicationContext.java:288)
at org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor$CompleteRefreshTask.run(DependencyWaiterApplicationContextExecutor.java:145)
at java.lang.Thread.run(Unknown Source)
解决方法:
这个博客shows how it can be handled与Spring的动态模块.
基于该博客,您将在应用程序上下文中为DAO和Service bean创建bean定义. DAO引用了hibernate sessionFactory bean：
<bean id="stuffDao" class="com.es.t.eee.domain.dao.StuffSourceDaoImpl">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<bean id="stuffService"
class="com.es.t.eee.domain.dao.StuffServiceImpl">
<property name="stuffDao" ref="stuffDao"/>
</bean>
<bean id="stuffSource"
class="com.es.t.eee.domain.StuffSource" scope="prototype"/>
StuffSourceDaoImpl将实现store()方法来持久化StuffSource,它将StuffSource传递给HibernateTemplate以实际执行持久性.
为了避免必须定义persistence.xml文件或指定每个实体,您可以使用AnnotationSessionFactoryBean和通配符来包含包含您的实体的包中的所有类型(您可能希望设置packagesToScan属性,我已经没试过这个可能会让你回到原来的问题)：
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="hibernateProperties">
<props>
<!--etc-->
</props>
</property>
<!-- set either one of these properties -->
<property name="annotatedClasses">
<list>
<value>com.es.t.eee.domain.StuffSource</value>
<value>com.es.t.eee.domain.PostalAddress</value>
</list>
</property>
<property name="packagesToScan">
<list>
<value>com.es.t.eee.domain</value>
</list>
</property>
</bean>
要使用它,你将获得BundleContext,从上下文中获取服务和bean,然后继续正常：
String serviceName = StuffService .class.getName();
StuffService service =
(StuffService )context.getService(context.getServiceReference(serviceName));
String stuffName = StuffSource.class.getName();
StuffSource stuffSource =
(StuffSource) context.getService(context.getServiceReference(stuffName ));
//do whatever with StuffSource
...
service.store(stuffSource );
您可能还想查看讨论涉及的一些问题的OSGi Alliance blog.来自OSGi Alliance博客：
Hibernate manipulates the classpath, and programs like that usually do not work well together with OSGi based systems. The reason is that in many systems the class visibility between modules is more or less unrestricted. In OSGi frameworks, the classpath is well defined and restricted. This gives us a lot of good features but it also gives us pain when we want to use a library that has aspirations to become a classloader when it grows up.
…To work with Hibernate, you need a Session object. You can get a Session object from a SessionFactory. To get the the SessionFactory, you need to create it with a Configuration object. The Configuration object is created from a configuration XML file. By default, Hibernate loads this from the root of your JAR file, however, you can add classes manually to the configuration if so desired.
标签：spring,hibernate,equinox 来源： https://codeday.me/bug/20190607/1192606.html