无法获得码头来阅读jetty-env.xml [英] Can't get jetty to read jetty-env.xml

问题描述

我有以下内容:

启动代码:

    Server server = new Server(8080);

    WebAppContext context = new WebAppContext();

    context.setDescriptor("/WEB-INF/web.xml");
    context.setResourceBase("/home/webapp);
    context.setContextPath("/");
    context.setParentLoaderPriority(true);

    server.setHandler(context);

    server.start();

/p/home/webapp/WEB-INF中的

jetty-env.xml:

jetty-env.xml in /home/webapp/WEB-INF:

 <?xml version="1.0"?> 
 <Configure class="org.mortbay.jetty.webapp.WebAppContext">
   <New id="properties"  class="org.mortbay.jetty.plus.naming.EnvEntry">
     <Arg>property_file</Arg>
     <Arg>/home/webapp/web.properties</Arg>
   </New>  
 </Configure>

classpath中的jndi.properties:

jndi.properties in classpath:

java.naming.factory.url.pkgs=org.eclipse.jetty.jndi
java.naming.factory.initial=org.eclipse.jetty.jndi.InitialContextFactory

初始上下文创建成功，但是尝试查找property_file键会引发未找到名称的异常.枚举仅返回jndi.properties中定义的键.

The initial context is created OK, but attempting to lookup the property_file key throws name not found exception. Enumeration only returns the keys defined in jndi.properties.

Context initContext = new InitialContext();
Hashtable<?,?> ht = initContext.getEnvironment();
Enumeration<?> keys = ht.keys();
while(keys.hasMoreElements()) {
    Object key = keys.nextElement();
    System.out.println(key.toString() + "=" + ht.get(key).toString());
}

String props=(String)initContext.lookup("java:comp/env/property_file");

我在做什么错了?

推荐答案

您的码头版本混在一起.

You have a bad mix of jetty versions.

<Configure class="org.mortbay.jetty.webapp.WebAppContext">
<New id="properties"  class="org.mortbay.jetty.plus.naming.EnvEntry">

这表明Jetty 6的用途，并且...

That points to Jetty 6 use, and ...

java.naming.factory.url.pkgs=org.eclipse.jetty.jndi
java.naming.factory.initial=org.eclipse.jetty.jndi.InitialContextFactory

使用Jetty 9的要点...

points to Jetty 9 use...

这就是让您感到困惑的原因. 您使用的XML在Jetty 9上不起作用(仅Jetty 6)，并且永远不要为Jetty 9手动定义所定义的属性文件(它出现在jetty-jndi-{ver}.jar中)

This is what is messing you up. The XML you are using will not work on Jetty 9 (Only Jetty 6), and the properties file you are defining should never be defined manually for Jetty 9 (its present in the jetty-jndi-{ver}.jar)

$ jar -tvf lib/jetty-jndi-9.2.9.v20150224.jar | grep jndi.properties
125 Tue Feb 24 10:49:42 MST 2015 jndi.properties

Jetty 9的说明位于

The instructions for Jetty 9 are found at

https://www.eclipse.org/jetty/documentation/current/jndi-embedded.html

这是设置具有JNDI支持的Embedded Jetty的方式. 您需要在WebAppContext配置中启用某些部分，并且应该可以使用jetty-env.xml.

This is how you setup Embedded Jetty with JNDI support. There's some parts you need to enable in the WebAppContext configuration, and that should enable the jetty-env.xml to be used.

即...

// Enable parsing of jndi-related parts of web.xml and jetty-env.xml
Configuration.ClassList classlist = Configuration.ClassList.setServerDefault(server);
classlist.addAfter("org.eclipse.jetty.webapp.FragmentConfiguration",
    "org.eclipse.jetty.plus.webapp.EnvConfiguration",
    "org.eclipse.jetty.plus.webapp.PlusConfiguration");

最后，此处记录了jetty-env.xml的结构和语法

Finally, the jetty-env.xml structure and syntax are documented here

https://www.eclipse.org/jetty/documentation/current/jndi-configuration.html

所以您的示例如下所示……

So your example would look like this ...

<?xml version="1.0"?> 
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN"
   "http://www.eclipse.org/jetty/configure_9_0.dtd">
<Configure id="wac" class="org.eclipse.jetty.webapp.WebAppContext">
  <New id="properties" class="org.eclipse.jetty.plus.jndi.EnvEntry">
    <Arg><Ref refid="wac"/></Arg>
    <Arg>property_file</Arg>
    <Arg>/home/webapp/web.properties</Arg>
    <Arg type="boolean">true</Arg>
  </New>
</Configure>

是的，DOCTYPE很重要.

Yes, the DOCTYPE is important.

关于EnvEntry的4个参数，这些参数记录在

As for the 4 parameters on EnvEntry, those are documented at the APIDOC site for EnvEntry.

最后一条建议，不要在您的项目中使用jetty-all.jar，它的存​​在只是允许对Jetty进行一些基本的命令行试验，并不意味着可以在您的项目中将其用作依赖项.

One last piece of advice, DO NOT USE jetty-all.jar for your project, it exists only to allow some basic command line experimentation with Jetty, it is not meant to be used as a dependency in your project.

这篇关于无法获得码头来阅读jetty-env.xml的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！