Pax Web中的Jetty错误处理程序注册错误

时间:2017-10-03 11:27:51

标签: java jetty pax-web

我正在尝试向Paty Web OSGi容器中嵌入的Jetty 8注册一个自定义错误处理程序。我将以下基本xml配置添加到jetty.xml文件中:

<Call name="addBean">
    <Arg>
      <New class="my.custom.handler">
        <Set name="server"><Ref id="Server"/></Set>
      </New>
    </Arg>
</Call>

但是,在此配置Jetty无法启动后,我从日志文件中收到以下根本原因的错误消息:

Caused by: java.lang.NoSuchMethodException: class my.error.handler.MyErrorHandler.setServer(class org.ops4j.pax.web.service.jetty.internal.JettyServerWrapper)
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.set(XmlConfiguration.java:592)[70:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.configure(XmlConfiguration.java:396)[70:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.newObj(XmlConfiguration.java:827)[70:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.itemValue(XmlConfiguration.java:1141)[70:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.value(XmlConfiguration.java:1044)[70:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.call(XmlConfiguration.java:735)[70:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.configure(XmlConfiguration.java:400)[70:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.configure(XmlConfiguration.java:334)[70:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.xml.XmlConfiguration.configure(XmlConfiguration.java:281)
... 16 more

似乎Pax使用JettyServerWrapper包装Jetty的Server类,并且无法使用来自xml配置的Reflection设置它。当我深入研究Jetty源代码时,我发现此代码与xml:

中的反射配置有关

来自org.eclipse.jetty.xml.XmlConfiguration的内部类JettyXmlConfiguration:

private void set(Object obj, XmlParser.Node node) throws Exception
{
    ...
    // Try for trivial match
    try
    {
        Method set = oClass.getMethod(name,vClass);
        set.invoke(obj,arg);
        return;
     }
     ...
}

从代码中可以明显看出,XmlConfiguration的set方法只是尝试获取具有特定类型的方法,但它并不寻求父类。这就是无法在自定义错误处理程序上设置Pax包装的Server实例的原因。

因此,使用xml配置Jetty变得不可用。你有任何解决方案吗?

1 个答案:

答案 0 :(得分:0)

您可以在文档中找到有关如何配置Jetty的说明: http://ops4j.github.io/pax/web/SNAPSHOT/User-Guide.html#adding-specialized-contexthandlers

此外,这里有一个快速总结:

<Get name="handler">
  <Call name="addHandler">
    <Arg>
     <New class="org.eclipse.jetty.servlet.ServletContextHandler">
       <Set name="contextPath">/app</Set>
       <Set name="resourceBase">/path/to/your/share</Set>
       <Call name="addServlet">
         <Arg>org.eclipse.jetty.servlet.DefaultServlet</Arg>
         <Arg>/</Arg>
       </Call>
     </New>
   </Arg>
 </Call>
</Get>

您不需要以定义如何开始的方式配置Jetty,而是需要适应&#34;正在运行的实例。