Karaf OSGi配置拋出ResolutionException：無法解析root：缺少要求[root] osgi.identity;

Question

我正在創建一個將在Karaf上運行的Spring Boot應用程序。 我試圖在Karaf中公開項目配置屬性，以便能夠使用config：property-set更改屬性，而無需重新部署應用程序。

因此，我設法配置了karaf功能以將屬性公開給Karaf，但是我試圖創建一個OSGi組件，以便在config：property-set更改屬性時能夠獲取更新。

嘗試安裝我的.kar文件時出現以下錯誤：

[[A2019-05-19T23:09:32,926 | INFO  | pipe-kar:install file:/Users/nikos/development/interlink/thirdParty/osgi-karaf-spring-boot-demo/osgi-spring-boot-demo-features/target/osgi-spring-boot-demo-features-0.0.1-SNAPSHOT.kar | KarServiceImpl                   | 35 - org.apache.karaf.kar.core - 4.1.3 | Added feature repository 'mvn:com.nemesis/osgi-spring-boot-demo-features/0.0.1-SNAPSHOT/xml/features'
2019-05-19T23:09:32,927 | INFO  | pipe-kar:install file:/Users/nikos/development/interlink/thirdParty/osgi-karaf-spring-boot-demo/osgi-spring-boot-demo-features/target/osgi-spring-boot-demo-features-0.0.1-SNAPSHOT.kar | FeaturesServiceImpl              | 9 - org.apache.karaf.features.core - 4.1.3 | Adding features: osgi-spring-boot-demo-feature/[0.0.1.SNAPSHOT,0.0.1.SNAPSHOT]
2019-05-19T23:09:32,995 | WARN  | pipe-kar:install file:/Users/nikos/development/interlink/thirdParty/osgi-karaf-spring-boot-demo/osgi-spring-boot-demo-features/target/osgi-spring-boot-demo-features-0.0.1-SNAPSHOT.kar | KarServiceImpl                   | 35 - org.apache.karaf.kar.core - 4.1.3 | Unable to install Kar feature osgi-spring-boot-demo-feature/0.0.1.SNAPSHOT
org.osgi.service.resolver.ResolutionException: Unable to resolve root: missing requirement [root] osgi.identity; osgi.identity=osgi-spring-boot-demo-feature; type=karaf.feature; version="[0.0.1.SNAPSHOT,0.0.1.SNAPSHOT]"; filter:="(&(osgi.identity=osgi-spring-boot-demo-feature)(type=karaf.feature)(version>=0.0.1.SNAPSHOT)(version<=0.0.1.SNAPSHOT))" [caused by: Unable to resolve osgi-spring-boot-demo-feature/0.0.1.SNAPSHOT: missing requirement [osgi-spring-boot-demo-feature/0.0.1.SNAPSHOT] osgi.identity; osgi.identity=com.nemesis.osgi-spring-boot-demo-bundle; type=osgi.bundle; version="[0.0.1.SNAPSHOT,0.0.1.SNAPSHOT]"; resolution:=mandatory [caused by: Unable to resolve com.nemesis.osgi-spring-boot-demo-bundle/0.0.1.SNAPSHOT: missing requirement [com.nemesis.osgi-spring-boot-demo-bundle/0.0.1.SNAPSHOT] osgi.extender; filter:="(&(osgi.extender=osgi.component)(version>=1.3.0)(!(version>=2.0.0)))"]]
    at org.apache.felix.resolver.ResolutionError.toException(ResolutionError.java:42) ~[?:?]
    at org.apache.felix.resolver.ResolverImpl.doResolve(ResolverImpl.java:391) ~[?:?]
    at org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:377) ~[?:?]
    at org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:349) ~[?:?]
    at org.apache.karaf.features.internal.region.SubsystemResolver.resolve(SubsystemResolver.java:218) ~[?:?]
    at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:291) ~[?:?]
    at org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1248) ~[?:?]
    at org.apache.karaf.features.internal.service.FeaturesServiceImpl.lambda$doProvisionInThread$1(FeaturesServiceImpl.java:1147) ~[?:?]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:?]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:?]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:?]
    at java.lang.Thread.run(Thread.java:748) [?:?]

這是我的github倉庫 。 我正在將Java 8與Maven 3.6，org.osgi.core 5.0.0，Karaf 4.1.3一起使用

有什么想法可以解決該問題嗎？ 是使用@Component和@Modified從Karaf獲取屬性修改更新的正確方法嗎？

提前致謝！

Answer 1

該錯誤消息表示您缺少提供捆綁軟件要求之一的捆綁軟件。

您會在此長錯誤消息的末尾找到缺少的要求：

(&(osgi.extender=osgi.component)(version>=1.3.0)(!(version>=2.0.0)))

這意味着您缺少osgi.component模型的擴展程序。

那到底是怎么回事？ 您可以在類中使用聲明式服務注釋。 Maven軟件包插件讀取它們並為聲明性服務以及上述擴展程序的要求創建xml。

因此，此要求可以幫助您在安裝軟件包時不要錯過聲明式服務運行時。

如果是karaf，解決方案是安裝提供運行時的功能：

feature:install scr

Answer 2

由於未安裝從屬捆綁包或已安裝捆綁包的版本不在范圍內，因此出現了上述錯誤，

您可以在karaf終端中通過以下命令檢查捆綁軟件是否已安裝以及安裝的版本：

  la -l|grep "#bundle name"

其中包名稱是您要獲取錯誤的包，

有時可能只缺少一個捆綁軟件，但是有可能未安裝該功能，該功能僅是一組捆綁軟件，

要檢查功能是否已安裝，請使用以下命令：

feature:list|grep "#feature name" 

在這里，您可以安裝該功能，它應該可以解決問題

feature:install scr