海波无痕 Thu, 11 Mar 2010 15:14:11 +0800 FeedCreator 1.7.2 海波无痕 http://ziki.cn/q/index.php/q-b_uuid-18.html <p>修改Tapestry3在{yourServlet}.application配置加载存在于classpath中的组件规范<br />在Tapestry3中的{yourServlet}.application文件中不能加载配置在classpath中的jwc组件规范<br />如<br />&lt;application name=&quot;yourApp&quot; engine-class=&quot;org.apache.tapestry.engine.BaseEngine&quot;&gt;<br />&nbsp;&lt;component-type type=&quot;MyComponent&quot; specification-path=&quot;/com/yourApp/components/MyComponent.jwc&quot;/&gt;<br />&lt;/application&gt;</p><p>这种写法按照常规的应该从classpath拿到组件的规范文件,但Tapestry3中出错拿不到规范文件<br />tapestry3分别有两个 org.apache.tapestry.IResourceLocation 的实现<br />org.apache.tapestry.resource.ClasspathResourceLocation<br />org.apache.tapestry.resource.ContextResourceLocation<br />分别加载classpath下的资源和webContext下的资源</p><p>解决办法<br />修改org.apache.tapestry.engine.Namespace类</p><p>&nbsp;&nbsp;&nbsp; private IComponentSpecification locateComponentSpecification(String type)<br />&nbsp;&nbsp;&nbsp; {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; String path = _specification.getComponentSpecificationPath(type);</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (path == null)<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; throw new ApplicationRuntimeException(<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tapestry.format(&quot;Namespace.no-such-alias&quot;, type, getNamespaceId()));</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; IResourceLocation location = getSpecificationLocation().getRelativeLocation(path);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //hack<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (location.getResourceURL() == null &amp;&amp; path.startsWith(&quot;/&quot;))<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; location = new ClasspathResourceLocation(_specification.getResourceResolver(), path);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //hack</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return _specificationSource.getComponentSpecification(location);<br />&nbsp;&nbsp;&nbsp; }</p><p>增加该方法的hack的地方强制从classpath中查找资源</p> 海波无痕 Fri, 18 Jan 2008 03:33:19 +0800 http://ziki.cn/q/index.php/q-b_uuid-17.html <p>Caused by: java.lang.ClassNotFoundException: Class bytes found but defineClass()failed for:</p><p><font face="宋体" size="3">高版本JDK编译的class在低版本JDK下无法运行</font></p> 海波无痕 Thu, 17 Jan 2008 08:29:51 +0800