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在 cxf Servlet 上找不到资源类

发布于 2024-10-21 03:48:56 字数 8565 浏览 6 评论 0原文

我创建了一个非常简单的 cxf 非基于 spring 的 Servlet，它加载 javax.ws.rs.Application 类型。

这是 web.xml：

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    version="2.5">

  <servlet>
        <servlet-name>CXFServlet</servlet-name>
        <servlet-class>
            org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet
        </servlet-class>
        <init-param>
            <param-name>javax.ws.rs.Application</param-name>
            <param-value>
                com.mycomp.cxf.TestApplication
            </param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>CXFServlet</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>

</web-app>

这是应用程序：

public class TestApplication extends Application
{
    private final Set<Class<?>> classes = new HashSet<Class<?>>();
    private final Set<Object> singletons = new HashSet<Object>();

    public TestApplication() throws ServletException 
    {

    }

    @Override
    public Set<Class<?>> getClasses() 
    {
        return classes;
    }

    @Override
    public Set<Object> getSingletons() 
    {
        return singletons;
    }
}

Servlet 无法加载，原因是：“未找到资源类”，我不确定为什么，因为在应用程序中拥有一组空的类应该没问题。

这是完整的堆栈跟踪：

org.apache.cxf.jaxrs.AbstractJAXRSFactoryBean                          - No resource classes found
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/test]  - StandardWrapper.Throwable
org.apache.cxf.service.factory.ServiceConstructionException
    at org.apache.cxf.jaxrs.JAXRSServerFactoryBean.create(JAXRSServerFactoryBean.java:122)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createServerFromApplication(CXFNonSpringJaxrsServlet.java:304)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.loadBus(CXFNonSpringJaxrsServlet.java:72)
    at org.apache.cxf.transport.servlet.AbstractCXFServlet.init(AbstractCXFServlet.java:78)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1172)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:992)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4058)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4371)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
    at com.springsource.osgi.webcontainer.tomcat.TomcatServletContainer.startWebApplication(TomcatServletContainer.java:120)
    at com.springsource.osgi.webcontainer.internal.StandardWebContainer$StandardWebApplication.start(StandardWebContainer.java:100)
    at com.springsource.osgi.webcontainer.extender.WebContainerBundleCustomizer.addingBundle(WebContainerBundleCustomizer.java:25)
    at org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:440)
    at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:261)
    at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:233)
    at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:413)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:919)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:227)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:149)
    at org.eclipse.osgi.framework.internal.core.Framework.publishBundleEventPrivileged(Framework.java:1349)
    at org.eclipse.osgi.framework.internal.core.Framework.publishBundleEvent(Framework.java:1300)
    at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:380)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:284)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:276)
    at com.sap.core.js.deployer.watchservice.WARDeployer.deploy(WARDeployer.java:142)
    at com.sap.core.js.deployer.watchservice.FileSystemEventsListener.onChange(FileSystemEventsListener.java:26)
    at com.springsource.util.io.FileSystemChecker.notifyListeners(FileSystemChecker.java:182)
    at com.springsource.util.io.FileSystemChecker.check(FileSystemChecker.java:145)
    at com.sap.core.js.deployer.watchservice.WatchTask.run(WatchTask.java:29)
    at java.lang.Thread.run(Thread.java:679)
Caused by: javax.ws.rs.WebApplicationException
    at org.apache.cxf.jaxrs.AbstractJAXRSFactoryBean.checkResources(AbstractJAXRSFactoryBean.java:238)
    at org.apache.cxf.jaxrs.JAXRSServerFactoryBean.create(JAXRSServerFactoryBean.java:85)
    ... 31 more
10:41:54,580 [ERROR] org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/test]  - Servlet /test threw load() exception
javax.ws.rs.WebApplicationException
    at org.apache.cxf.jaxrs.AbstractJAXRSFactoryBean.checkResources(AbstractJAXRSFactoryBean.java:238)
    at org.apache.cxf.jaxrs.JAXRSServerFactoryBean.create(JAXRSServerFactoryBean.java:85)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createServerFromApplication(CXFNonSpringJaxrsServlet.java:304)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.loadBus(CXFNonSpringJaxrsServlet.java:72)
    at org.apache.cxf.transport.servlet.AbstractCXFServlet.init(AbstractCXFServlet.java:78)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1172)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:992)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4058)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4371)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
    at com.springsource.osgi.webcontainer.tomcat.TomcatServletContainer.startWebApplication(TomcatServletContainer.java:120)
    at com.springsource.osgi.webcontainer.internal.StandardWebContainer$StandardWebApplication.start(StandardWebContainer.java:100)
    at com.springsource.osgi.webcontainer.extender.WebContainerBundleCustomizer.addingBundle(WebContainerBundleCustomizer.java:25)
    at org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:440)
    at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:261)
    at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:233)
    at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:413)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:919)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:227)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:149)
    at org.eclipse.osgi.framework.internal.core.Framework.publishBundleEventPrivileged(Framework.java:1349)
    at org.eclipse.osgi.framework.internal.core.Framework.publishBundleEvent(Framework.java:1300)
    at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:380)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:284)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:276)
    at com.sap.core.js.deployer.watchservice.WARDeployer.deploy(WARDeployer.java:142)
    at com.sap.core.js.deployer.watchservice.FileSystemEventsListener.onChange(FileSystemEventsListener.java:26)
    at com.springsource.util.io.FileSystemChecker.notifyListeners(FileSystemChecker.java:182)
    at com.springsource.util.io.FileSystemChecker.check(FileSystemChecker.java:145)
    at com.sap.core.js.deployer.watchservice.WatchTask.run(WatchTask.java:29)
    at java.lang.Thread.run(Thread.java:679)
原文

I have created a very simple cxf non-spring based Servlet which loads a javax.ws.rs.Application type.

Here is the web.xml:

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    version="2.5">

  <servlet>
        <servlet-name>CXFServlet</servlet-name>
        <servlet-class>
            org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet
        </servlet-class>
        <init-param>
            <param-name>javax.ws.rs.Application</param-name>
            <param-value>
                com.mycomp.cxf.TestApplication
            </param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>CXFServlet</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>

</web-app>

And here is the application:

public class TestApplication extends Application
{
    private final Set<Class<?>> classes = new HashSet<Class<?>>();
    private final Set<Object> singletons = new HashSet<Object>();

    public TestApplication() throws ServletException 
    {

    }

    @Override
    public Set<Class<?>> getClasses() 
    {
        return classes;
    }

    @Override
    public Set<Object> getSingletons() 
    {
        return singletons;
    }
}

The Servlet is failing to load due to: "No resource classes found" and i'm not sure why as it should be ok to have an empty set of classes in Application.

Here is the full stacktrace:

org.apache.cxf.jaxrs.AbstractJAXRSFactoryBean                          - No resource classes found
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/test]  - StandardWrapper.Throwable
org.apache.cxf.service.factory.ServiceConstructionException
    at org.apache.cxf.jaxrs.JAXRSServerFactoryBean.create(JAXRSServerFactoryBean.java:122)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createServerFromApplication(CXFNonSpringJaxrsServlet.java:304)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.loadBus(CXFNonSpringJaxrsServlet.java:72)
    at org.apache.cxf.transport.servlet.AbstractCXFServlet.init(AbstractCXFServlet.java:78)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1172)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:992)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4058)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4371)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
    at com.springsource.osgi.webcontainer.tomcat.TomcatServletContainer.startWebApplication(TomcatServletContainer.java:120)
    at com.springsource.osgi.webcontainer.internal.StandardWebContainer$StandardWebApplication.start(StandardWebContainer.java:100)
    at com.springsource.osgi.webcontainer.extender.WebContainerBundleCustomizer.addingBundle(WebContainerBundleCustomizer.java:25)
    at org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:440)
    at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:261)
    at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:233)
    at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:413)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:919)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:227)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:149)
    at org.eclipse.osgi.framework.internal.core.Framework.publishBundleEventPrivileged(Framework.java:1349)
    at org.eclipse.osgi.framework.internal.core.Framework.publishBundleEvent(Framework.java:1300)
    at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:380)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:284)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:276)
    at com.sap.core.js.deployer.watchservice.WARDeployer.deploy(WARDeployer.java:142)
    at com.sap.core.js.deployer.watchservice.FileSystemEventsListener.onChange(FileSystemEventsListener.java:26)
    at com.springsource.util.io.FileSystemChecker.notifyListeners(FileSystemChecker.java:182)
    at com.springsource.util.io.FileSystemChecker.check(FileSystemChecker.java:145)
    at com.sap.core.js.deployer.watchservice.WatchTask.run(WatchTask.java:29)
    at java.lang.Thread.run(Thread.java:679)
Caused by: javax.ws.rs.WebApplicationException
    at org.apache.cxf.jaxrs.AbstractJAXRSFactoryBean.checkResources(AbstractJAXRSFactoryBean.java:238)
    at org.apache.cxf.jaxrs.JAXRSServerFactoryBean.create(JAXRSServerFactoryBean.java:85)
    ... 31 more
10:41:54,580 [ERROR] org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/test]  - Servlet /test threw load() exception
javax.ws.rs.WebApplicationException
    at org.apache.cxf.jaxrs.AbstractJAXRSFactoryBean.checkResources(AbstractJAXRSFactoryBean.java:238)
    at org.apache.cxf.jaxrs.JAXRSServerFactoryBean.create(JAXRSServerFactoryBean.java:85)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createServerFromApplication(CXFNonSpringJaxrsServlet.java:304)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.loadBus(CXFNonSpringJaxrsServlet.java:72)
    at org.apache.cxf.transport.servlet.AbstractCXFServlet.init(AbstractCXFServlet.java:78)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1172)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:992)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4058)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4371)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
    at com.springsource.osgi.webcontainer.tomcat.TomcatServletContainer.startWebApplication(TomcatServletContainer.java:120)
    at com.springsource.osgi.webcontainer.internal.StandardWebContainer$StandardWebApplication.start(StandardWebContainer.java:100)
    at com.springsource.osgi.webcontainer.extender.WebContainerBundleCustomizer.addingBundle(WebContainerBundleCustomizer.java:25)
    at org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:440)
    at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:261)
    at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:233)
    at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:413)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:919)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:227)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:149)
    at org.eclipse.osgi.framework.internal.core.Framework.publishBundleEventPrivileged(Framework.java:1349)
    at org.eclipse.osgi.framework.internal.core.Framework.publishBundleEvent(Framework.java:1300)
    at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:380)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:284)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:276)
    at com.sap.core.js.deployer.watchservice.WARDeployer.deploy(WARDeployer.java:142)
    at com.sap.core.js.deployer.watchservice.FileSystemEventsListener.onChange(FileSystemEventsListener.java:26)
    at com.springsource.util.io.FileSystemChecker.notifyListeners(FileSystemChecker.java:182)
    at com.springsource.util.io.FileSystemChecker.check(FileSystemChecker.java:145)
    at com.sap.core.js.deployer.watchservice.WatchTask.run(WatchTask.java:29)
    at java.lang.Thread.run(Thread.java:679)

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评论（2）

感悟人生的甜 2024-10-28 03:48:56

您需要将您的服务类通知给您的环境。您首先需要添加服务类，否则您将在 getSingletons() 中返回 null
因此，只需更改现在为空的构造函数即可添加服务类：

class TestApplication extends Application {
    public TestApplication() throws ServletException 
    {
      singletons.add( new com.example.MyService() )
    }
    ....
}

You need to notify your environment of your serviceclasses. You first need to add the service class, otherwise you will just return null in getSingletons()
So just change your now empty constructor to add the service class:

class TestApplication extends Application {
    public TestApplication() throws ServletException 
    {
      singletons.add( new com.example.MyService() )
    }
    ....
}
回复 原文
唱一曲作罢 2024-10-28 03:48:56

好吧，我想你不能有一组空的类，就像我添加一个然后它加载成功一样，例如：

public TestApplication() throws ServletException 
{
        singletons.add(someClass);
}

Well, I guess you can't have an empty set of classes as if I add one then it loads successfully, for example:

public TestApplication() throws ServletException 
{
        singletons.add(someClass);
}
回复 原文
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