Spring OSGi类路径资源问题
我正在尝试在 osgi （fuse esb）中部署基于 spring 的包。在 spring 上下文中，我指的是 resources 文件夹内的 db4o 文件。根据我的理解，maven 项目将确保资源文件夹下的任何可用文件都将在项目类路径中可用。我将该文件保存在 resources/META-INF/spring/repo/test.db4o 下。
这是 spring 上下文中的条目。
<bean id="objectContainer" class="org.springmodules.db4o.ObjectContainerFactoryBean">
<property name="databaseFile" value="classpath:META-INF/spring/repo/test.db4o" />
</bean>
一旦我安装并尝试启动该应用程序，我就会收到以下异常。
java.io.FileNotFoundException: OSGi resource[classpath:META-INF/spring/repo/test.db4o|bnd.id=258|bnd.sym=taxonomydaoimplbundle] cannot be resolved to absolute file path because it does not reside in the file system: bundle://258.0:1/META-INF/spring/repo/test.db4o
我尝试了不同的组合，但 OSGi 似乎无法识别该文件。任何指针将不胜感激。
-谢谢
I'm trying to deploy a spring based bundle in osgi (fuse esb).In spring context, I'm referring to a db4o file which is inside resources folder. As per my understanding, a maven project will make sure that any file available under resources folder will be available in project classpath. I've kept the file under resources/META-INF/spring/repo/test.db4o.
Here's the entry in spring context.
<bean id="objectContainer" class="org.springmodules.db4o.ObjectContainerFactoryBean">
<property name="databaseFile" value="classpath:META-INF/spring/repo/test.db4o" />
</bean>
Once I install and try to start the application, I'm getting the following exception.
java.io.FileNotFoundException: OSGi resource[classpath:META-INF/spring/repo/test.db4o|bnd.id=258|bnd.sym=taxonomydaoimplbundle] cannot be resolved to absolute file path because it does not reside in the file system: bundle://258.0:1/META-INF/spring/repo/test.db4o
I've tried different combinations, but OSGi doesn't seem to recognize this file. Any pointer will be appreciated.
-Thanks
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我终于找到问题了。 ObjectContainerFactoryBean 依赖 OSGiResourceBundle 将资源作为文件对象加载。尽管 OSGiResourceBundle 公开了一个名为 getFile() 的方法，但它在 OSGi 环境中无法按预期工作。它始终需要文件协议，而作为 URI 返回的资源具有协议“包”。因此，会引发异常。解决方法是使用 inputstream 或 getUrl。由于我没有 ObjectContainerFactoryBean 的源代码，因此我必须扩展此类以提供我自己的实现，该实现将文件作为输入流加载。
I found the issue finally. ObjectContainerFactoryBean is relying on OSGiResourceBundle to load the resource as a file object. Though OSGiResourceBundle exposes a method called getFile(), it doesn't work as intended in an OSGi environment. It always expects a file protocol whereas the resource returned as an URI has a protocol "bundle".Hence, the exception is being thrown. The workaround is to use a inputstream or getUrl. Since I didn't have the source code of ObjectContainerFactoryBean, I had to extend this class to provide my own implementation which loads the file as an inputstream.