java - jdo/OSGi : error building JDO PersistenceManagerFactory after bundle update

Question

我在 karaf 2.2.10 之上使用带有 datanucleus-mongodb 3.2.3 和 spring 3.0.7 的 JDO。

在新的 OSGi bundle 安装中，我能够在 mongodb 上持久保存而不会出现问题，但是在重新安装 bundle 后，我在构建新的 JDO PersistenceManagerFactory 时收到以下错误:

ERROR: Bundle [my_bundle] [242] Unable to get module class path.
(java.lang.IllegalStateException: zip file closed)      

其中 ID (242) 指的是第一个分配给 bundle 的 ID(换句话说，旧 bundle 的 ID)。

上一个包的上下文以及“旧”JDO PersistenceManagerFactory 似乎已正确关闭。

我的本​​地持久化管理器工厂 bean 类(基于 example provided in the dn site ):

public class OSGiLocalPersistenceManagerFactoryBean
    extends LocalPersistenceManagerFactoryBean implements BundleContextAware {

    public static final String JDO_BUNDLE_NAME    = "org.datanucleus.api.jdo";
    public static final String JDO_PMF_CLASS_NAME = "org.datanucleus.api.jdo.JDOPersistenceManagerFactory";

    private BundleContext bundleContext;

    @Override
    protected PersistenceManagerFactory newPersistenceManagerFactory(String name) {
        return JDOHelper.getPersistenceManagerFactory(name, getClassLoader());
    }

    @Override
    protected PersistenceManagerFactory newPersistenceManagerFactory(Map props) {
        ClassLoader classLoader = getClassLoader();

        props.put("datanucleus.primaryClassLoader", classLoader);

        if (FrameworkUtil.getBundle(this.getClass()) != null) { // running in OSGi
            props.put("datanucleus.plugin.pluginRegistryClassName", "org.datanucleus.plugin.OSGiPluginRegistry");
        }

        PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory(props, classLoader);

        return pmf;
    }

    private ClassLoader getClassLoader() {
        ClassLoader classLoader = null;
        Bundle thisBundle = FrameworkUtil.getBundle(this.getClass());

        if (thisBundle != null) { // on OSGi runtime
            Bundle[] bundles = bundleContext.getBundles();

            for (Bundle bundle : bundles) {
                if (JDO_BUNDLE_NAME.equals(bundle.getSymbolicName())) {
                    try {
                        classLoader = bundle.loadClass(JDO_PMF_CLASS_NAME).getClassLoader();
                    } catch (ClassNotFoundException e) {
                        // do something fancy here ...
                    }
                    break;
                }
            }
        } else { // somewhere else
            classLoader = this.getClass().getClassLoader();
        }
        return classLoader;
    }

    @Override
    public void setBundleContext(BundleContext bundleContext) {
        this.bundleContext = bundleContext;
    }
}

上下文中一些与持久性相关的摘录:

<!-- persistence manager factory -->
<bean id="pmf" class="[my_package].OSGiLocalPersistenceManagerFactoryBean">
    <property name="configLocation" value="classpath:datanucleus.properties" />
</bean>

<!-- persistence manager factory proxy -->
<bean id="persistenceManagerFactoryProxy"
      class="org.springframework.orm.jdo.TransactionAwarePersistenceManagerFactoryProxy">
    <property name="targetPersistenceManagerFactory" ref="pmf" />
</bean>

<!-- transactions -->
<bean id="transactionManager" class="org.springframework.orm.jdo.JdoTransactionManager">
    <property name="persistenceManagerFactory" ref="persistenceManagerFactoryProxy" />
</bean>

<tx:annotation-driven />

错误消息似乎指向类加载问题，但是为什么它只在重新部署期间失败？

任何提示将不胜感激!

Answer 1

确保您还刷新了依赖的 bundle ，因为这些 bundle 通常会保留在旧的已卸载的 bundle 中。它仍然存在，直到清除所有引用为止。在 Karaf shell 中，您只需要发出刷新或简单刷新而不需要 ID，这将导致整个容器重新布线:)