maven - 无法启动 bundle - 缺少要求(osgi.wiring.package)

Question

我是 Apache karaf 和 OSGI 的新手。我正在尝试编写和运行一个非常简单的包。但是我在启动那个包时遇到了这个错误:

Error executing command: Error executing command on bundles: Unable to resolve karaf [86](R 86.0): missing requirement [karaf [86](R 86.0)] osgi.wiring.package; (osgi.wiring.package=bundle) Unresolved requirements: [[karaf [86](R 86.0)] osgi.wiring.package; (osgi.wiring.package=bundle)]

我的 pom 是:4.0.0

<groupId>com</groupId>
<artifactId>karaf</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>bundle</packaging>

<name>karaf Bundle</name>
<description>
    karaf OSGi bundle project.
</description>

<properties>
    <maven-bundle-plugin.version>2.5.4</maven-bundle-plugin.version>
    <osgi.version>6.0.0</osgi.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.osgi</groupId>
        <artifactId>org.osgi.core</artifactId>
        <version>${osgi.version}</version>

        <scope>provided</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <version>${maven-bundle-plugin.version}</version>
            <extensions>true</extensions>
            <configuration>
                <instructions>
                    <Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
                    <Bundle-Version>${project.version}</Bundle-Version>
                    <Bundle-Activator>bundle.Activator</Bundle-Activator>
                    <Export-Package>
                        bundle*;version=${project.version}
                    </Export-Package>
                    <Import-Package>
                         org.osgi.framework,*
                    </Import-Package>
                </instructions>
            </configuration>
        </plugin>
    </plugins>
</build>

我的 manifest.mf 文件在这里。

> Manifest-Version: 1.0
Bnd-LastModified: 1394131053386
Bundle-Copyright: Copyright (c) OSGi Alliance (2000, 2014). All Rights R
 eserved.
Bundle-Description: OSGi Core Release 6, Interfaces and Classes for use 
 in compiling bundles.
Bundle-License: http://opensource.org/licenses/apache2.0.php; link="http
 ://www.apache.org/licenses/LICENSE-2.0"; description="Apache License, V
 ersion 2.0"
Bundle-ManifestVersion: 2
Bundle-Name: osgi.core
Bundle-SymbolicName: osgi.core
Bundle-Vendor: OSGi Alliance
Bundle-Version: 6.0.0.201403061837
Created-By: 1.6.0_45 (Sun Microsystems Inc.)
DynamicImport-Package: *
Export-Package: org.osgi.dto;version="1.0",org.osgi.resource;version="1.
 0",org.osgi.resource.dto;version="1.0";uses:="org.osgi.dto",org.osgi.fr
 amework;version="1.8",org.osgi.framework.dto;version="1.8";uses:="org.o
 sgi.dto",org.osgi.framework.hooks.bundle;version="1.1";uses:="org.osgi.
 framework",org.osgi.framework.hooks.resolver;version="1.0";uses:="org.o
 sgi.framework.wiring",org.osgi.framework.hooks.service;version="1.1";us
 es:="org.osgi.framework",org.osgi.framework.hooks.weaving;version="1.1"
 ;uses:="org.osgi.framework.wiring",org.osgi.framework.launch;version="1
 .2";uses:="org.osgi.framework",org.osgi.framework.namespace;version="1.
 1";uses:="org.osgi.resource",org.osgi.framework.startlevel;version="1.0
 ";uses:="org.osgi.framework",org.osgi.framework.startlevel.dto;version=
 "1.0";uses:="org.osgi.dto",org.osgi.framework.wiring;version="1.2";uses
 :="org.osgi.framework,org.osgi.resource",org.osgi.framework.wiring.dto;
 version="1.2";uses:="org.osgi.dto,org.osgi.resource.dto",org.osgi.servi
 ce.condpermadmin;version="1.1.1";uses:="org.osgi.framework,org.osgi.ser
 vice.permissionadmin",org.osgi.service.packageadmin;version="1.2";uses:
 ="org.osgi.framework",org.osgi.service.permissionadmin;version="1.2",or
 g.osgi.service.startlevel;version="1.1";uses:="org.osgi.framework",org.
 osgi.service.url;version="1.0",org.osgi.util.tracker;version="1.5.1";us
 es:="org.osgi.framework"
Import-Package: javax.security.auth.x500;resolution:=optional
Tool: Bnd-2.2.0.20130927-173453

Answer 1

让我们分解一下:“缺少要求”仅表示您的 bundle 已安装到 OSGi 框架中，但它有一个要求，无法被安装的任何其他 bundle 满足。

Unresolved 需求在命名空间 osgi.wiring.package 中，这意味着这种需求是 Java 包导入，即您看到的 Import-Package 在你的包的 list 中。换句话说，您的包导入一个包，而没有其他包导出该包。

最后，(osgi.wiring.package=bundle) 是一个过滤器，它表达了您的包所需的确切包名。在这种情况下，您的包显然导入了一个名为“bundle”的包。

这有点奇怪，暗示您可能在构建包的方式上犯了错误。如果您发布有关如何构建此 bundle 的详细信息，将会有所帮助。