java - OSGI 包依赖

Question

我创建了一个依赖于 SLF4J 的包，因此我将 Logback 用于 OSGI 实现。这一切都捆绑在一起并安装正常但是当我开始捆绑时我得到以下异常:

org.osgi.framework.BundleException: Unable to resolve com.felix.test [20](R 20.0): missing requirement [com.felix.test [20](R 20.0)] osgi.wiring.package; (osgi.wiring.package=groovy.lang) Unresolved requirements: [[com.felix.test [20](R 20.0)] osgi.wiring.package; (osgi.wiring.package=groovy.lang)]

我可以在我的 list 文件中看到 groovy.lang 列在 Import-Package 中，我很确定问题是 Logback 被嵌入但没有它的引用文献是。

我正在使用它来创建包，这是配置:

<plugin>
    <groupId>org.apache.felix</groupId>
    <artifactId>maven-bundle-plugin</artifactId>
    <version>2.5.4</version>
    <extensions>true</extensions>
    <configuration>
        <instructions>
            <Import-Package>
                *
            </Import-Package>
            <Embed-Dependency>
                *
            </Embed-Dependency>
            <Embed-Directory>
                osgi-inf/libs
            </Embed-Directory>
            <Embed-Transitive>
                true
            </Embed-Transitive>
        </instructions>
    </configuration>
</plugin>

这是我的 list :

Manifest-Version: 1.0
Bnd-LastModified: 1436982944102
Build-Jdk: 1.8.0_45
Built-By: tim.clifford
Bundle-ClassPath: .,osgi-inf/libs/org.osgi.core-1.0.0.jar,osgi-inf/libs/
 servlet-api-2.5.jar,osgi-inf/libs/org.apache.felix.scr.annotations-1.9.
 6.jar,osgi-inf/libs/httpclient-osgi-4.5.jar,osgi-inf/libs/httpclient-4.
 5.jar,osgi-inf/libs/httpcore-4.4.1.jar,osgi-inf/libs/commons-logging-1.
 2.jar,osgi-inf/libs/commons-codec-1.9.jar,osgi-inf/libs/httpmime-4.5.ja
 r,osgi-inf/libs/httpclient-cache-4.5.jar,osgi-inf/libs/fluent-hc-4.5.ja
 r,osgi-inf/libs/ehcache-2.10.0.jar,osgi-inf/libs/slf4j-api-1.7.7.jar,os
 gi-inf/libs/commons-lang3-3.4.jar,osgi-inf/libs/logback-classic-1.1.3.j
 ar,osgi-inf/libs/logback-core-1.1.3.jar
Bundle-ManifestVersion: 2
Bundle-Name: com.felix.test
Bundle-SymbolicName: com.felix.test
Bundle-Version: 1.0.0.SNAPSHOT
Created-By: Apache Maven Bundle Plugin
Embed-Dependency: *
Embed-Directory: osgi-inf/libs
Embed-Transitive: true
Embedded-Artifacts: osgi-inf/libs/org.osgi.core-1.0.0.jar;g="org.apache.
 felix";a="org.osgi.core";v="1.0.0",osgi-inf/libs/servlet-api-2.5.jar;g=
 "javax.servlet";a="servlet-api";v="2.5",osgi-inf/libs/org.apache.felix.
 scr.annotations-1.9.6.jar;g="org.apache.felix";a="org.apache.felix.scr.
 annotations";v="1.9.6",osgi-inf/libs/httpclient-osgi-4.5.jar;g="org.apa
 che.httpcomponents";a="httpclient-osgi";v="4.5",osgi-inf/libs/httpclien
 t-4.5.jar;g="org.apache.httpcomponents";a="httpclient";v="4.5",osgi-inf
 /libs/httpcore-4.4.1.jar;g="org.apache.httpcomponents";a="httpcore";v="
 4.4.1",osgi-inf/libs/commons-logging-1.2.jar;g="commons-logging";a="com
 mons-logging";v="1.2",osgi-inf/libs/commons-codec-1.9.jar;g="commons-co
 dec";a="commons-codec";v="1.9",osgi-inf/libs/httpmime-4.5.jar;g="org.ap
 ache.httpcomponents";a="httpmime";v="4.5",osgi-inf/libs/httpclient-cach
 e-4.5.jar;g="org.apache.httpcomponents";a="httpclient-cache";v="4.5",os
 gi-inf/libs/fluent-hc-4.5.jar;g="org.apache.httpcomponents";a="fluent-h
 c";v="4.5",osgi-inf/libs/ehcache-2.10.0.jar;g="net.sf.ehcache";a="ehcac
 he";v="2.10.0",osgi-inf/libs/slf4j-api-1.7.7.jar;g="org.slf4j";a="slf4j
 -api";v="1.7.7",osgi-inf/libs/commons-lang3-3.4.jar;g="org.apache.commo
 ns";a="commons-lang3";v="3.4",osgi-inf/libs/logback-classic-1.1.3.jar;g
 ="ch.qos.logback";a="logback-classic";v="1.1.3",osgi-inf/libs/logback-c
 ore-1.1.3.jar;g="ch.qos.logback";a="logback-core";v="1.1.3"
Export-Package: com.felix.test;version="1.0.0"
Import-Package: groovy.lang,javax.crypto,javax.crypto.spec,javax.jms,jav
 ax.mail,javax.mail.internet,javax.management,javax.management.openmbean
 ,javax.naming,javax.naming.directory,javax.naming.ldap,javax.net,javax.
 net.ssl,javax.security.auth.x500,javax.sql,javax.swing.event,javax.tran
 saction,javax.transaction.xa,javax.xml.datatype,javax.xml.namespace,jav
 ax.xml.parsers,javax.xml.stream,javax.xml.stream.events,net.spy.memcach
 ed,org.apache.avalon.framework.logger,org.apache.felix.scrplugin,org.ap
 ache.felix.scrplugin.annotations,org.apache.felix.scrplugin.description
 ,org.apache.log,org.apache.log4j,org.codehaus.commons.compiler,org.code
 haus.groovy.control,org.codehaus.groovy.control.customizers,org.codehau
 s.groovy.reflection,org.codehaus.groovy.runtime,org.codehaus.groovy.run
 time.callsite,org.codehaus.groovy.runtime.typehandling,org.codehaus.gro
 ovy.runtime.wrappers,org.codehaus.groovy.transform,org.codehaus.janino,
 org.hibernate,org.hibernate.cache,org.hibernate.cache.access,org.hibern
 ate.cfg,org.hibernate.impl,org.hibernate.stat,org.hibernate.transaction
 ,org.ietf.jgss,org.osgi.service.cm,org.quartz,org.quartz.impl,org.quart
 z.impl.jdbcjobstore,org.quartz.impl.matchers,org.quartz.simpl,org.terra
 cotta.quartz,org.terracotta.toolkit,org.terracotta.toolkit.atomic,org.t
 erracotta.toolkit.builder,org.terracotta.toolkit.cache,org.terracotta.t
 oolkit.cluster,org.terracotta.toolkit.collections,org.terracotta.toolki
 t.concurrent.locks,org.terracotta.toolkit.config,org.terracotta.toolkit
 .events,org.terracotta.toolkit.feature,org.terracotta.toolkit.internal,
 org.terracotta.toolkit.internal.cache,org.terracotta.toolkit.internal.c
 luster,org.terracotta.toolkit.internal.collections,org.terracotta.toolk
 it.internal.concurrent.locks,org.terracotta.toolkit.internal.feature,or
 g.terracotta.toolkit.monitoring,org.terracotta.toolkit.nonstop,org.terr
 acotta.toolkit.rejoin,org.terracotta.toolkit.search,org.terracotta.tool
 kit.search.attribute,org.terracotta.toolkit.store,org.xml.sax,org.xml.s
 ax.helpers,sun.misc,sun.reflect
Require-Capability: osgi.ee;filter:="(&(osgi.ee=JavaSE)(version=1.6))"
Tool: Bnd-2.4.1.201501161923

我的做法是正确的还是有更好的方法？

谢谢!

Answer 1

对于“我走的路对不对”的问题，答案是“绝对不是”!

请不要使用Embed-Dependency 。这只是获取所有传递依赖图(在您的情况下，它以某种方式包括 Groovy 语言运行时)并将其粘贴到您的包中。

这完全忽略了 OSGi 的要点。更糟糕的是，当您开发下一个包时，您将不得不再次经历所有这些!最终您将拥有数十个 bundle ，每个 bundle 都承载着大量的嵌入式依赖项。

正如 Christian 所说，坚持使用 maven-bundle-plugin 提供的默认值.您甚至不需要指定 <Import-Package>*</Import-Package>因为这已经是默认值了。因此，您将获得一个包含包导入的包，这是一件好事!但是您需要安装提供与您的导入相匹配的导出的包。