maven - 如何克服 OSGi 中的 "Missing optionally imported package"问题

Question

我使用“maven-bundle-plugin”编写了一个 OSGi 包(我尝试将“jruby-complete-1.4.0.jar”作为 osgi 包，注意唯一的依赖项是“jruby-complete-1.4. 0.jar")..当我使用 diag 命令(#diag XX)通过 osgi 控制台检查包时，它说缺少一些包；

osgi> diag 51
reference:file:dropins/jruby-complete-1.4.0.wso2v1.jar [51]
  Direct constraints which are unresolved:
    Missing optionally imported package com.sun.mirror.apt_0.0.0.
    Missing optionally imported package com.sun.mirror.declaration_0.0.0.
    Missing optionally imported package com.sun.mirror.type_0.0.0.
    Missing optionally imported package com.sun.mirror.util_0.0.0.
    Missing optionally imported package org.apache.bsf.util_0.0.0.
    Missing optionally imported package org.jgrapht_0.0.0.
    Missing optionally imported package org.jgrapht.graph_0.0.0.
    Missing optionally imported package sun.misc_0.0.0.

我的 pom 是这样的；

<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>
                            com.kenai.*,
                            com.sun.jna.*,
                            org.jruby.*,
                            org.joni.*,                            
                        </Export-Package>
                        <Import-Package>                
                        *;resolution:=optional
                        </Import-Package>
                        <Fragment-Host>bsf-all</Fragment-Host>
            <DynamicImport-Package>*</DynamicImport-Package>    
            <Embed-Dependency>*;scope=compile|runtime;inline=true;</Embed-Dependency>       
                    </instructions>
                </configuration>
            </plugin>

因此，我尝试在 <Import-Package> 中添加那些“可选的缺失包” pom[2] 中的选项但它给出了更多问题，例如；

ference:file:dropins/jruby-complete-1.4.0.wso2v1.jar [51]
Constraints from the fragment conflict with the host: Import-Package: *; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: com.sun.mirror.apt; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: com.sun.mirror.declaration; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: com.sun.mirror.type; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: com.sun.mirror.util; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: javax.management; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: javax.script; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: javax.swing.plaf.basic; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: org.apache.bsf; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: org.apache.bsf.util; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: org.jgrapht; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: org.jgrapht.graph; version="0.0.0"
Constraints from the fragment conflict with the host: Import-Package: org.jruby.anno; version="[1.4.0,2.0.0)"
Constraints from the fragment conflict with the host: Import-Package: org.jruby.exceptions; version="[1.4.0,2.0.0)"
Constraints from the fragment conflict with the host: Import-Package: org.jruby.runtime; version="[1.4.0,2.0.0)"
Constraints from the fragment conflict with the host: Import-Package: org.jruby.runtime.builtin; version="[1.4.0,2.0.0)"
Constraints from the fragment conflict with the host: Import-Package: sun.misc; version="0.0.0"
Direct constraints which are unresolved:
  Missing imported package com.sun.mirror.apt_0.0.0.
  Missing imported package com.sun.mirror.declaration_0.0.0.
  Missing imported package com.sun.mirror.type_0.0.0.
  Missing imported package com.sun.mirror.util_0.0.0.
  Missing imported package org.apache.bsf.util_0.0.0.
  Missing imported package org.jgrapht_0.0.0.
  Missing imported package org.jgrapht.graph_0.0.0.
  Missing optionally imported package org.jruby.anno_[1.4.0,2.0.0).
  Missing optionally imported package org.jruby.exceptions_[1.4.0,2.0.0).
  Missing optionally imported package org.jruby.runtime_[1.4.0,2.0.0).
  Missing optionally imported package org.jruby.runtime.builtin_[1.4.0,2.0.0).
  Missing imported package sun.misc_0.0.0.  

pom.xml [2];

 <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>
                            com.kenai.*,
                            com.sun.jna.*,
                            org.jruby.*,
                            org.joni.*,                            
                        </Export-Package>
                        <Import-Package>                
                        com.sun.mirror.apt.*,
                        com.sun.mirror.declaration.*,
                        com.sun.mirror.type.*,
                        com.sun.mirror.util.*,
                        org.apache.bsf.util.*,
                        org.jgrapht.*,
                        org.jgrapht.graph.*,
                        sun.misc.*,
                          *;resolution:=optional
                        </Import-Package>
                        <Fragment-Host>bsf-all</Fragment-Host>
            <DynamicImport-Package>*</DynamicImport-Package>    
            <Embed-Dependency>*;scope=compile|runtime;inline=true;</Embed-Dependency>       
                    </instructions>
                </configuration>
            </plugin>

我怎样才能克服上述问题？我正在导出一些包，我需要其他包...我在这里做错了什么吗？

Answer 1

这些包是可选导入的，所以这里不一定有任何问题。

更新 发布者修改问题后:

bundle 插件通过检查您的 bundle 中的字节码发现了这些依赖关系。它们通常是强制依赖项，但出于某种原因，您通过添加 <Import-Package>*;resolution:=optional</Import-Package> 将它们设为可选。 .不确定你为什么那样做，但没关系......

解析包的正确方法是找到一个导出它们的包。例如，您的包需要包 org.jgrapht .因此，您需要安装导出该包的包。

唯一的异常(exception)是 sun.misc包，它显然来自 JRE，但通常不应该使用。 OSGi 框架默认不提供此包，但您可以通过添加以下设置来配置它们:

org.osgi.framework.system.packages.extra=sun.misc

放置此设置的确切文件或位置取决于您的 OSGi 框架——您尚未指定您使用的是哪个框架，因此无论它是什么，请查看其文档以了解如何传递配置设置。