问题描述
我正在按照本教程 https://wiki.onosproject.org/display/ONOS/Template+Application+Tutorial 创建一个 CLI 命令，该命令允许我通过意图阻止 OF 交换机的接口。我按照此处的建议使用 Bazel 构建了 ONOS https://wiki.onosproject.org/display/ONOS/Developer+Quick+Start，一切都进展顺利，甚至在 ONOS 中创建和安装模板应用程序也是如此。现在在 java 类 AppCommand 中，我导入了包 org.onosproject.openflow.controller.OpenFlowController，在 pom.xml 文件中添加了具有 artifactID 和 groupID onos-of-api-1.6.0 的依赖项，当我重新安装应用程序时出现此错误被抛出：
Unable to perform operation on application org.foo.app
org.apache.Felix.resolver.reason.ReasonException: Unable to resolve root: missing requirement [root] osgi.identity; osgi.identity=foo-app; type=karaf.feature; version="[1.0.0.SNAPSHOT,1.0.0.SNAPSHOT]"; filter:="(&(osgi.identity=foo-app)(type=karaf.feature)(version>=1.0.0.SNAPSHOT)(version<=1.0.0.SNAPSHOT))" [caused by: Unable to resolve foo-app/1.0.0.SNAPSHOT: missing requirement [foo-app/1.0.0.SNAPSHOT] osgi.identity; osgi.identity=org.foo.foo-app; type=osgi.bundle; version="[1.0.0.SNAPSHOT,1.0.0.SNAPSHOT]"; resolution:=mandatory [caused by: Unable to resolve org.foo.foo-app/1.0.0.SNAPSHOT: missing requirement [org.foo.foo-app/1.0.0.SNAPSHOT] osgi.wiring.package; filter:="(&(osgi.wiring.package=org.onosproject.openflow.controller)(version>=1.6.0)(!(version>=2.0.0)))"]]
at org.apache.Felix.resolver.Candidates$MissingRequirementError.toException(Candidates.java:1343) ~[?:?]
at org.apache.Felix.resolver.ResolverImpl.doResolve(ResolverImpl.java:392) ~[?:?]
at org.apache.Felix.resolver.ResolverImpl.resolve(ResolverImpl.java:378) ~[?:?]
at org.apache.Felix.resolver.ResolverImpl.resolve(ResolverImpl.java:332) ~[?:?]
at org.apache.karaf.features.internal.region.SubsystemResolver.resolve(SubsystemResolver.java:257) ~[?:?]
at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:393) ~[?:?]
at org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1062) ~[?:?]
at org.apache.karaf.features.internal.service.FeaturesServiceImpl.lambda$doProvisionInThread$13(FeaturesServiceImpl.java:998) ~[?:?]
at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
at java.lang.Thread.run(Thread.java:834) [?:?]
好像是依赖的版本有问题，但不明白为什么。
非常感谢您的关注。
解决方法
您从 Karaf 收到的错误消息表明您有一个不满足的依赖项。当您的依赖项在 MANIFEST.MF 文件中没有（或有不正确的）OSGi 元数据时，通常会发生这种情况。您应该打开它并确定您使用的构建系统是否包含它，如果包含，是否存在依赖项也是 OSGi 化的包。
在这种情况下，检查具有 org.onosproject.openflow.controller 的 Jar 是否是 OSGi 包 - 它看起来不像。