标签: apache-karaf

我想在应该支持Java 8的最新Apache-Karaf版本（3.0.2）中使用Java 8功能。

我的域层（存储库）中有一个服务接口，该接口具有用于生成身份的默认方法

public interface MyRepository{

    ...

    default MyId nextIdentity() {
        return new MyId(UUID.randomUUID().toString().toUpperCase());
    }
}

然后，我有了该接口的实现，该接口使用Blueprint（Apache-Aries）作为OSGi-Service公开。

当我运行我的应用程序时，捆绑包安装成功，服务被注册，但是当应用程序层调用nextIdentity方法时，我得到一个异常。

IncompatibleClassChangeError: Found interface MyRepository, but class was expected

应用层很简单：Interface-Attribute通过Blueprint注入其类（在本例中为OSGi-Service-Reference）。

我确实检查了编译：所有模块都在Eclipse中使用Java 8符合性级别进行了编译。我猜测问题与不是Java 8的aries-proxy有关，但由于karaf支持。

编辑：添加了Stacktrace

org.apache.wicket.WicketRuntimeException: Can't instantiate page using constructor 'public bikeshop.http.wicket.page.GaragePage()'. Might be it doesn't exist, may be it is not visible (public).
    at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:193)[92:org.apache.wicket.core:6.7.0]
    at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:66)[92:org.apache.wicket.core:6.7.0]
    at org.ops4j.pax.wicket.internal.PaxWicketPageFactory.newPage(PaxWicketPageFactory.java:76)[100:org.ops4j.pax.wicket.service:3.0.2]
    at org.apache.wicket.DefaultMapperContext.newPageInstance(DefaultMapperContext.java:133)[92:org.apache.wicket.core:6.7.0]
    at org.apache.wicket.core.request.handler.PageProvider.resolvePageInstance(PageProvider.java:268)[92:org.apache.wicket.core:6.7.0]
    at org.apache.wicket.core.request.handler.PageProvider.getPageInstance(PageProvider.java:166)[92:org.apache.wicket.core:6.7.0]
    at org.apache.wicket.request.handler.render.PageRenderer.getPage(PageRenderer.java:78)[92:org.apache.wicket.core:6.7.0]
    at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:244)[92:org.apache.wicket.core:6.7.0]
    at org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:165)[92:org.apache.wicket.core:6.7.0]
    at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:854)[92:org.apache.wicket.core:6.7.0]
    at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)[91:org.apache.wicket.request:6.7.0]
    at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:254)[92:org.apache.wicket.core:6.7.0]
    at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:211)[92:org.apache.wicket.core:6.7.0]
    at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:282)[92:org.apache.wicket.core:6.7.0] …

在Google浏览器上搜索了很多,我知道它用于测试和构建OSGI包.我还没弄清楚如何处理Apache Karaf以及如何使用它我也不太了解OSGI包的需求.

此外,我也想知道以下疑虑的答案:

1. 什么是简单的单词Apache karaf？
2. 它解决了什么目的？它可以用于解决日常的算法问题吗？
3. 我在哪里可以找到关于Karaf的好教程问题
4. Apache Karaf,Apache Felix和Apache Maven有什么区别？它们与OSGI有什么关系？

我正在尝试运行PAX考试测试,该测试启动了Karaf实例版本4.0.2,然后部署了一些功能.到目前为止一切都有效.

但是,我还想运行一些命令来检查是否已经安装了bundle,即运行"bundle:list"命令.

我在这里添加了executeCommand和getOsgiService方法:https: //github.com/christian-posta/rider-auto-osgi/blob/master/itests/src/test/java/org/jboss/fuse/example/support /FuseTestSupport.java#L80

但我得到RuntimeException:

java.lang.RuntimeException: Gave up waiting for service (objectClass=org.apache.felix.service.command.CommandProcessor)
    at com.axiell.tenantidlookup.integrationtest.TenantIdLookupTest.getOsgiService(TenantIdLookupTest.java:205)
    at com.axiell.tenantidlookup.integrationtest.TenantIdLookupTest.getOsgiService(TenantIdLookupTest.java:171)
    at com.axiell.tenantidlookup.integrationtest.TenantIdLookupTest.testProvisioning(TenantIdLookupTest.java:110)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.ops4j.pax.exam.invoker.junit.internal.ContainerTestRunner.runChild(ContainerTestRunner.java:68)
    at org.ops4j.pax.exam.invoker.junit.internal.ContainerTestRunner.runChild(ContainerTestRunner.java:37)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
    at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.invokeViaJUnit(JUnitProbeInvoker.java:124)
    at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.findAndInvoke(JUnitProbeInvoker.java:97)
    at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.call(JUnitProbeInvoker.java:73)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.ops4j.pax.exam.rbc.internal.RemoteBundleContextImpl.remoteCall(RemoteBundleContextImpl.java:80)
    at …

我想在超类中初始化一些变量.

在OSGI中,有一个方法activate()在服务/组件启动时调用.但是在activate方法之前调用构造函数.

哪一个(activate()方法或构造函数)在OSGI中初始化变量是有效的.

嗨我的pax考试失败,错误未知协议:换行

org.apache.karaf.features.internal.util.MultiException: Error
    at org.apache.karaf.features.internal.download.impl.MavenDownloadManager$MavenDownloader.<init>(MavenDownloadManager.java:84)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.download.impl.MavenDownloadManager.createDownloader(MavenDownloadManager.java:72)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.region.Subsystem.downloadBundles(Subsystem.java:363)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.region.Subsystem.downloadBundles(Subsystem.java:360)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.region.SubsystemResolver.resolve(SubsystemResolver.java:187)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:263)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1089)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.service.FeaturesServiceImpl$1.call(FeaturesServiceImpl.java:985)[9:org.apache.karaf.features.core:4.0.4]
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)[:1.7.0_79]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[:1.7.0_79]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)[:1.7.0_79]
    at java.lang.Thread.run(Thread.java:745)[:1.7.0_79]
Caused by: java.io.IOException: Error downloading wrap:file:/C:/Users/609620968/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar
    at org.apache.karaf.features.internal.download.impl.AbstractRetryableDownloadTask.run(AbstractRetryableDownloadTask.java:67)[9:org.apache.karaf.features.core:4.0.4]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)[:1.7.0_79]
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)[:1.7.0_79]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)[:1.7.0_79]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)[:1.7.0_79]
    ... 3 more
Caused by: java.io.IOException: Could not download [wrap:file:/C:/Users/609620968/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar]
    at org.apache.karaf.features.internal.download.impl.SimpleDownloadTask.download(SimpleDownloadTask.java:90)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.download.impl.AbstractRetryableDownloadTask.run(AbstractRetryableDownloadTask.java:58)[9:org.apache.karaf.features.core:4.0.4]
    ... 7 more
Caused by: java.net.MalformedURLException: Unknown protocol: wrap
    at java.net.URL.<init>(URL.java:619)[:1.7.0_79]
    at java.net.URL.<init>(URL.java:482)[:1.7.0_79]
    at java.net.URL.<init>(URL.java:431)[:1.7.0_79]
    at org.apache.karaf.features.internal.download.impl.SimpleDownloadTask.download(SimpleDownloadTask.java:62)[9:org.apache.karaf.features.core:4.0.4]
    ... 8 more

当我将我的karaf版本从3.03更改为4.04时,此错误开始出现

开始研究新项目,我们正在使用Apache Karaf来运行OSGi包.有人建议我在Karaf里面使用Equinox而不是Felix.如果Equinox比Felix更好,请一些人告诉我,如果是这样的话.