【发布时间】：2021-04-06 19:39:25
【问题描述】：
我尝试基于 Karaf 创建一个基本的虚拟现实 IDE。
我有 3 个 maven 项目：
- 连接到本机组件进行渲染的 VRServer。
- 用于 VR-HMI-Widgets 的 VR 组件工具包（具有从 VRComponent 扩展的 VRFrame）作为 Multi-Module-Maven-Project。
- VR IDE 项目读取/写入文件并执行低级命令。
我将它们全部安装到 Karaf 中：
karaf@root()> bundle:list
START LEVEL 100 , List Threshold: 50
ID | State | Lvl | Version | Name
----+--------+-----+--------------------+---------------------------------------------------------------------------
31 | Active | 80 | 4.3.0 | Apache Karaf :: OSGi Services :: Event
54 | Active | 80 | 1.3.2 | Apache Aries SPI Fly Dynamic Weaving Bundle
55 | Active | 80 | 9.0.0 | org.objectweb.asm
56 | Active | 80 | 9.0.0 | org.objectweb.asm.commons
57 | Active | 80 | 9.0.0 | org.objectweb.asm.tree
58 | Active | 80 | 9.0.0 | org.objectweb.asm.tree.analysis
59 | Active | 80 | 9.0.0 | org.objectweb.asm.util
60 | Active | 80 | 2.0.17 | OpenWebBeans Core
61 | Active | 80 | 2.0.17 | SPI definition
62 | Active | 80 | 1.1.3 | Apache Aries CDI - CDI Component Runtime (CCR)
63 | Active | 80 | 1.1.3 | Apache Aries CDI - SPI classes for Portable Extensions
64 | Active | 80 | 1.1.3 | Apache Aries CDI - Container using Apache OpenWebBeans
65 | Active | 80 | 1.1.3 | Apache Aries CDI - SPI
66 | Active | 80 | 1.0.12 | Apache Felix Converter
67 | Active | 80 | 1.2.0 | Apache Geronimo JSR-330 Spec 1.0
68 | Active | 80 | 1.1.0 | Apache Geronimo Expression Language Spec 2.2
69 | Active | 80 | 1.2.0 | Apache Geronimo Interceptor Spec 1.2
70 | Active | 80 | 1.2.0 | Apache Geronimo JCDI Spec 2.0
71 | Active | 80 | 1.3.0.3 | Apache ServiceMix :: Specs :: Annotation API 1.3
72 | Active | 80 | 4.17.0 | Apache XBean :: ASM shaded (repackaged)
73 | Active | 80 | 4.17.0 | Apache XBean OSGI Bundle Utilities
74 | Active | 80 | 4.17.0 | Apache XBean :: Finder shaded (repackaged)
75 | Active | 80 | 1.0.1.201505202024 | org.osgi:org.osgi.namespace.extender
76 | Active | 80 | 1.0.0.201505202024 | org.osgi:org.osgi.namespace.implementation
77 | Active | 80 | 1.0.0.201505202024 | org.osgi:org.osgi.namespace.service
78 | Active | 80 | 1.0.0.201810101357 | org.osgi:org.osgi.service.cdi
79 | Active | 80 | 1.1.0.201802012106 | org.osgi:org.osgi.util.function
80 | Active | 80 | 1.1.0.201802012106 | org.osgi:org.osgi.util.promise
81 | Active | 80 | 4.3.1.SNAPSHOT | Apache Karaf :: OSGi Services :: Event
134 | Active | 80 | 1.0.0 | Virtual reality server
135 | Active | 80 | 0.0.1.SNAPSHOT | VRComponent
136 | Active | 80 | 0.0.1.SNAPSHOT | VRFrame
142 | Active | 80 | 0.0.1.SNAPSHOT | Virtual reality integrated development environment (VRIDE)
karaf@root()>
但是当我尝试启动 VRIDE 包时，我得到了这个异常：
10:00:42.193 WARN [fileinstall-C:\Program Files\apache-karaf-4.3.0/deploy] Error while creating extension
java.lang.NoClassDefFoundError: Lde/e_nexus/vr/tk/VRFrame;
at java.lang.Class.getDeclaredFields0(Native Method) ~[?:1.8.0_232]
at java.lang.Class.privateGetDeclaredFields(Class.java:2611) ~[?:1.8.0_232]
at java.lang.Class.getDeclaredFields(Class.java:1944) ~[?:1.8.0_232]
at org.apache.aries.cdi.container.internal.util.Reflection.allFields(Reflection.java:47) ~[!/:1.1.3]
at org.apache.aries.cdi.container.internal.annotated.AnnotatedTypeImpl.<init>(AnnotatedTypeImpl.java:42) ~[!/:1.1.3]
at org.apache.aries.cdi.container.internal.container.Discovery.lambda$discover$8(Discovery.java:133) ~[!/:1.1.3]
at java.util.HashMap$Values.forEach(HashMap.java:981) ~[?:1.8.0_232]
这是我尝试加载的 Java 类：
package de.e_nexus.desktop.vr.ide;
import java.util.logging.Logger;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
import org.osgi.service.cdi.annotations.Reference;
import org.osgi.service.cdi.annotations.Service;
import de.e_nexus.vr.server.ClientKeyboardScancode;
import de.e_nexus.vr.server.VRClientHelmetAndControllerListener;
import de.e_nexus.vr.server.VRClientKeyboardListener;
import de.e_nexus.vr.server.VRServer;
import de.e_nexus.vr.server.listeners.VRClientRequestAppInfo;
import de.e_nexus.vr.server.listeners.VRClientStatusListener;
import de.e_nexus.vr.server.listeners.interaction.HelmetAndControllerInfo;
import de.e_nexus.vr.server.osgi.inter.VRServerService;
import de.e_nexus.vr.tk.VRFrame;
@ApplicationScoped
@Service
public class StartIDE implements VRClientStatusListener, VRClientRequestAppInfo, VRClientHelmetAndControllerListener, VRClientKeyboardListener {
/**
* The logger for this class.
*/
private static final Logger LOG = Logger.getLogger(StartIDE.class.getCanonicalName());
private final static Object lock = new Object();
private VRServer vrServer;
public void notifyStatus(boolean connected) {
if (!connected) {
synchronized (lock) {
lock.notify();
}
}
}
@Reference
@Inject
private VRServerService vrServerService;
private VRFrame applicationFrame;
@PostConstruct
public void initialize() {
LOG.fine("Starting VR IDE");
vrServer = vrServerService.getVRServer();
applicationFrame = new VRFrame(vrServer, "test");
LOG.info(getLatin1Title() + " started successfully!");
}
@PreDestroy
public void teardown() {
applicationFrame.remove();
LOG.info("Stoped " + getLatin1Title() + " successfully!");
vrServer = null;
}
public VRServer getVrServer() {
return vrServer;
}
@Override
public void notify(HelmetAndControllerInfo haci) {
}
@Override
public String getLatin1Title() {
return "VR IDE";
}
@Override
public void notifyKeyboardEvent(ClientKeyboardScancode[] downs, ClientKeyboardScancode[] ups, long incomingTime) {
System.out.println("me");
}
}
编辑：
这是完整的堆栈跟踪：
java.lang.NoClassDefFoundError: Lde/e_nexus/vr/tk/VRFrame;
at java.lang.Class.getDeclaredFields0(Native Method) ~[?:1.8.0_232]
at java.lang.Class.privateGetDeclaredFields(Class.java:2611) ~[?:1.8.0_232]
at java.lang.Class.getDeclaredFields(Class.java:1944) ~[?:1.8.0_232]
at org.apache.aries.cdi.container.internal.util.Reflection.allFields(Reflection.java:47) ~[!/:1.1.3]
at org.apache.aries.cdi.container.internal.annotated.AnnotatedTypeImpl.<init>(AnnotatedTypeImpl.java:42) ~[!/:1.1.3]
at org.apache.aries.cdi.container.internal.container.Discovery.lambda$discover$8(Discovery.java:133) ~[!/:1.1.3]
at java.util.HashMap$Values.forEach(HashMap.java:981) ~[?:1.8.0_232]
at org.apache.aries.cdi.container.internal.container.Discovery.discover(Discovery.java:130) ~[!/:1.1.3]
at org.apache.aries.cdi.container.internal.container.ContainerState.<init>(ContainerState.java:178) ~[!/:1.1.3]
at org.apache.aries.cdi.container.internal.Activator.doCreateExtension(Activator.java:209) [!/:1.1.3]
at org.apache.felix.utils.extender.AbstractExtender.createExtension(AbstractExtender.java:242) [!/:1.1.3]
at org.apache.felix.utils.extender.AbstractExtender.modifiedBundle(AbstractExtender.java:227) [!/:1.1.3]
at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:488) [osgi.core-7.0.0.jar:?]
at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:420) [osgi.core-7.0.0.jar:?]
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:232) [osgi.core-7.0.0.jar:?]
at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:450) [osgi.core-7.0.0.jar:?]
at org.apache.felix.framework.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:915) [org.apache.felix.framework-6.0.3.jar:?]
at org.apache.felix.framework.EventDispatcher.fireEventImmediately(EventDispatcher.java:834) [org.apache.felix.framework-6.0.3.jar:?]
at org.apache.felix.framework.EventDispatcher.fireBundleEvent(EventDispatcher.java:516) [org.apache.felix.framework-6.0.3.jar:?]
at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4817) [org.apache.felix.framework-6.0.3.jar:?]
at org.apache.felix.framework.Felix.startBundle(Felix.java:2336) [org.apache.felix.framework-6.0.3.jar:?]
at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:998) [org.apache.felix.framework-6.0.3.jar:?]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle(DirectoryWatcher.java:1260) [!/:3.6.8]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles(DirectoryWatcher.java:1233) [!/:3.6.8]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.doProcess(DirectoryWatcher.java:520) [!/:3.6.8]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:365) [!/:3.6.8]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:316) [!/:3.6.8]
Caused by: java.lang.ClassNotFoundException: de.e_nexus.vr.tk.VRFrame not found by de.e-nexus.component [87]
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1597) ~[?:?]
at org.apache.felix.framework.BundleWiringImpl.access$300(BundleWiringImpl.java:79) ~[?:?]
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1982) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_232]
at org.apache.felix.framework.BundleWiringImpl.getClassByDelegation(BundleWiringImpl.java:1375) ~[?:?]
at org.apache.felix.framework.BundleWiringImpl.searchImports(BundleWiringImpl.java:1618) ~[?:?]
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1548) ~[?:?]
at org.apache.felix.framework.BundleWiringImpl.access$300(BundleWiringImpl.java:79) ~[?:?]
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1982) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_232]
... 27 more
【问题讨论】：
-
我在我的 linux 中尝试过 gist.github.com/ozkanpakdil/20b2b92d03f8ec323cb6b3980293b75b 看起来可以工作，您是否尝试将 kraf 放入另一个文件夹，如 c:/tools/ ？
-
@özkanpakdil 感谢您的努力。您成功加载了 OSGi 包，不幸的是它们是 OSGi-CDI 包。所以你需要一个 OSGi 中的 CDI 容器。请先按照本教程视频youtube.com/watch?v=hFgXPs251po&t=701s的注释中的命令安装CDI容器。
-
@Grim 你在哪里导出你的 VFrame 类的包？ pom文件中不应该有额外的Export-Package指令吗？
-
@rmunge 默认情况下felix.apache.org/documentation/subprojects/… 导出所有包。您可以通过使用
mvn构建VRComponentToolkit 并检查生成的frame-0.0.1-SNAPSHOT.jar来证明这一点。您会注意到MANIFEST.MF包含您的Export-Package: de.e_nexus.vr.tk.abs;version="0.0.1";uses:="de.e_nexus .vr.server,de.e_nexus.vr.server.mesh,de.e_nexus.vr.tk,(...)。 -
@Grim 你能告诉我如何测试 StartIDE，它是 karaf 命令吗？或者您打算如何在 karaf 控制台中调用它？我设法毫无错误地部署这些，它们看起来像已启动，我在控制台中看到一些日志，但我找不到测试 startIde 的方法 :) Karaf newbie here
标签： java maven osgi virtual-reality apache-karaf