如何在jar中使用JSF版本控制资源

Question

PF 3.5.10,Mojarra 2.1.21,omnifaces 1.5

我有一个JSF库(仅限css文件).该库位于.jar文件中.css将包含在xhtml中 <h:outputStylesheet library="mylib" name="css/mycss.css">.

在html中,它呈现如下: localhost:8080/cms/javax.faces.resource/css/mycss.css.jsf?ln=mylib

primefaces的CSS文件呈现为: localhost:8080/cms/javax.faces.resource/primefaces.js.jsf?ln=primefaces&v=3.5.10

注意最后的库版本(&3.5.10).我怎么能做同样的事情？我应该在Manifest.mf中编写版本吗？或者如何在jar文件中使用jsf-versioning？

Answer 1

遗憾的是,这是不可能的.JAR中的资源不支持库版本控制.

你基本上有两个选择:

1. 这是简单而丑陋的方式,包括服务器的启动时间作为查询字符串.鉴于您正在使用OmniFaces,您可以使用其内置#{startup}托管bean引用java.util.Date应用程序范围中的实例:

   <h:outputStylesheet ... name="some.css?#{startup.time}" />
   <h:outputScript ... name="some.js?#{startup.time}" />
   

   或者您可能已将该版本作为某个应用程序变量.

   <h:outputStylesheet ... name="some.css?v=#{app.version}" />
   <h:outputScript ... name="some.js?v=#{app.version}" />
   

   更新:尽管如此,这不起作用<h:outputStylesheet>.另见:https://github.com/javaserverfaces/mojarra/issues/3945或https://github.com/javaee/javaserverfaces-spec/issues/1395

   它<h:outputScript>虽然有效,但有一个非常简单的错误报告很快就实现了https://github.com/javaserverfaces/mojarra/issues/1216

2. 与PrimeFaces一样,创建自定义ResourceHandler.

   public class MyVersionResourceHandler extends ResourceHandlerWrapper {
   
       private ResourceHandler wrapped;
   
       public MyVersionResourceHandler(ResourceHandler wrapped) {
           this.wrapped = wrapped;
       }
   
       @Override
       public Resource createResource(String resourceName) {
           return createResource(resourceName, null, null);
       }
   
       @Override
       public Resource createResource(String resourceName, String libraryName) {
           return createResource(resourceName, libraryName, null);
       }
   
       @Override
       public Resource createResource(String resourceName, String libraryName, String contentType) {
           final Resource resource = super.createResource(resourceName, libraryName, contentType);
   
           if (resource == null) {
               return null;
           }
   
           return new ResourceWrapper() {
   
               @Override
               public String getRequestPath() {
                   return super.getRequestPath() + "&v=1.0";
               }
   
               @Override // Necessary because this is missing in ResourceWrapper (will be fixed in JSF 2.2).
               public String getResourceName() {
                   return resource.getResourceName();
               }
   
               @Override // Necessary because this is missing in ResourceWrapper (will be fixed in JSF 2.2).
               public String getLibraryName() {
                   return resource.getLibraryName();
               }
   
               @Override // Necessary because this is missing in ResourceWrapper (will be fixed in JSF 2.2).
               public String getContentType() {
                   return resource.getContentType();
               }
   
               @Override
               public Resource getWrapped() {
                   return resource;
               }
           };
       }
   
       @Override
       public ResourceHandler getWrapped() {
           return wrapped;
       }
   
   }
   

   或者,如果您碰巧已经使用过OmniFaces,可以更简单地完成:

   public class YourVersionResourceHandler extends DefaultResourceHandler {
   
       public YourVersionResourceHandler(ResourceHandler wrapped) {
           super(wrapped);
       }
   
       @Override
       public Resource decorateResource(Resource resource) {
           if (resource == null || !"mylib".equals(resource.getLibraryName())) {
               return resource;
           }
   
           return new RemappedResource(resource, resource.getRequestPath() + "&v=1.0");
       }
   
   }
   

   无论哪种方式,让它运行,它注册为<resource-handler>在/META-INF/faces-config.xml该JAR的.

   <application>
       <resource-handler>com.example.MyVersionResourceHandler</resource-handler>
   </application>