服务提供商和 OSGI 问题
我编写了一个 osgi 包,其中我依赖于一个 jar(bsf-all.jar),其中包含如下服务提供者(在 META_inf/services/ 下);
bsh.engine.BshScriptEngineFactory
com.sun.script.freemarker.FreeMarkerScriptEngineFactory
com.sun.script.groovy.GroovyScriptEngineFactory
com.sun.script.jacl.JaclScriptEngineFactory
com.sun.script.jaskell.JaskellScriptEngineFactory
com.sun.script.java.JavaScriptEngineFactory
com.sun.phobos.script.javascript.RhinoScriptEngineFactory
com.sun.phobos.script.javascript.EmbeddedRhinoScriptEngineFactory
com.sun.script.jawk.JawkScriptEngineFactory
com.sun.script.jelly.JellyScriptEngineFactory
com.sun.script.jep.JepScriptEngineFactory
com.sun.script.jexl.JexlScriptEngineFactory
com.sun.script.jruby.JRubyScriptEngineFactory
com.sun.script.judo.JudoScriptEngineFactory
com.sun.script.juel.JuelScriptEngineFactory
com.sun.script.jython.JythonScriptEngineFactory
com.sun.script.ognl.OgnlScriptEngineFactory
org.pnuts.scriptapi.PnutsScriptEngineFactory
com.sun.script.scheme.SchemeScriptEngineFactory
com.sun.script.velocity.VelocityScriptEngineFactory
com.sun.script.xpath.XPathScriptEngineFactory
com.sun.script.xslt.XSLTScriptEngineFactory
当我通过 OSGI 控制台检查我的包状态时,它是活动的并且没有任何依赖性问题。 但是当我尝试使用它时(意味着服务器启动并运行之后) 服务器抛出“找不到类”问题;
java.lang.ClassNotFoundException: com.sun.phobos.script.javascript.RhinoScriptEngineFactory
这个特定的类位于我的依赖项 jar(bsf-all.jar) 中,并且该类通过服务提供者公开。 我怀疑 OSGi 和 java 服务提供者存在类加载问题。
我的 pom.xml 如下;
<dependencies>
<dependency>
<groupId>org.apache.bsf</groupId>
<artifactId>bsf-all</artifactId>
<version>${bsf.version}</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>rhino</groupId>
<artifactId>js</artifactId>
<version>1.6R7</version>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<extensions>true</extensions>
<configuration>
<instructions>
<Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
<Bundle-Name>${project.artifactId}</Bundle-Name>
<Export-Package>
org.apache.bsf.*,
org.mozilla.javascript.*,
org.pnuts.scriptapi.*,
com.sun.script.*,
com.sun.phobos.script.*,
bsh.engine.*,
javax.script.*,
</Export-Package>
<Import-Package>
com.sun.*
</Import-Package>
<DynamicImport-Package>*</DynamicImport-Package>
<Embed-Dependency>js;scope=compile|runtime;inline=false;</Embed-Dependency>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
我正在使用 Equinox OSGi 实现。我如何编辑我的 pom 来克服上述问题?
I have written an osgi bundle, where i have dependency for a jar(bsf-all.jar), which contains service provider as follows (under META_inf/services/);
bsh.engine.BshScriptEngineFactory
com.sun.script.freemarker.FreeMarkerScriptEngineFactory
com.sun.script.groovy.GroovyScriptEngineFactory
com.sun.script.jacl.JaclScriptEngineFactory
com.sun.script.jaskell.JaskellScriptEngineFactory
com.sun.script.java.JavaScriptEngineFactory
com.sun.phobos.script.javascript.RhinoScriptEngineFactory
com.sun.phobos.script.javascript.EmbeddedRhinoScriptEngineFactory
com.sun.script.jawk.JawkScriptEngineFactory
com.sun.script.jelly.JellyScriptEngineFactory
com.sun.script.jep.JepScriptEngineFactory
com.sun.script.jexl.JexlScriptEngineFactory
com.sun.script.jruby.JRubyScriptEngineFactory
com.sun.script.judo.JudoScriptEngineFactory
com.sun.script.juel.JuelScriptEngineFactory
com.sun.script.jython.JythonScriptEngineFactory
com.sun.script.ognl.OgnlScriptEngineFactory
org.pnuts.scriptapi.PnutsScriptEngineFactory
com.sun.script.scheme.SchemeScriptEngineFactory
com.sun.script.velocity.VelocityScriptEngineFactory
com.sun.script.xpath.XPathScriptEngineFactory
com.sun.script.xslt.XSLTScriptEngineFactory
When i check my bundle state via OSGI console , it is Active and there is no any dependency issue..
But when i try to use it(means after the server up and running)
server throws "Class not found" issue ;
java.lang.ClassNotFoundException: com.sun.phobos.script.javascript.RhinoScriptEngineFactory
This particular class is in my dependency jar(bsf-all.jar) and that class is exposed via the service provider..
I suspect there is a class loading issue with OSGi and java service provider..
My pom.xml is as follows;
<dependencies>
<dependency>
<groupId>org.apache.bsf</groupId>
<artifactId>bsf-all</artifactId>
<version>${bsf.version}</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>rhino</groupId>
<artifactId>js</artifactId>
<version>1.6R7</version>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<extensions>true</extensions>
<configuration>
<instructions>
<Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
<Bundle-Name>${project.artifactId}</Bundle-Name>
<Export-Package>
org.apache.bsf.*,
org.mozilla.javascript.*,
org.pnuts.scriptapi.*,
com.sun.script.*,
com.sun.phobos.script.*,
bsh.engine.*,
javax.script.*,
</Export-Package>
<Import-Package>
com.sun.*
</Import-Package>
<DynamicImport-Package>*</DynamicImport-Package>
<Embed-Dependency>js;scope=compile|runtime;inline=false;</Embed-Dependency>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
I'm using Equinox OSGi implementation..How can i edit my pom to overcome above issue?
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我觉得这个 POM 中有太多根本性错误,无法开始推测 CNFE 的原因。您的
语句是最受关注的。为什么要在捆绑包中重新打包和导出整个 BSF、Rhino、Phobos 甚至部分 JDK?正如我在回答您之前的问题时所暗示的那样:我认为您陷入了低级细节的泥潭,而没有很好地理解您想要在高级别实现的目标。因此,即使有人发布了一个可以让您解决这个特定问题的答案,您仍然没有一个可行的架构。
请退后一步,概括地描述您想要实现的目标以及原因。然后我们可以提供基于良好 OSGi 实践的解决方案。
I feel that there are too many fundamental errors in this POM to begin speculating about the cause of the CNFE. Your
<Export-Package>
statement is of most concern. Why are you repackaging and exporting the whole of BSF, Rhino, Phobos and even parts of the JDK inside your bundle??As I implied in my answer to your earlier question: you are getting bogged down in low-level details without, I think, having a good understanding of what you are trying to achieve at the high level. Therefore even if somebody posts an answer that gets you past this particular issue, you will still not have a working architecture.
Please step back and describe at a high level what you are trying to achieve and why. Then we can offer a solution based on good OSGi practices.