Java 无描述符的servlet容器在servlet 3.x容器中作为过滤器运行
有没有办法在Servlet3.x容器中以Java 无描述符的servlet容器在servlet 3.x容器中作为过滤器运行,java,jersey,Java,Jersey,有没有办法在Servlet3.x容器中以javax.servlet.Filter的形式运行Jersey servlet容器(2.x)描述符?我需要在提供服务的同时提供静态资源,因此需要使用jersey.config.servlet.filter.forwardOn404或jersey.config.servlet.filter.staticContentRegex,它们仅在根据Javadoc作为过滤器运行时才起作用 该属性仅在Jersey servlet容器配置为作为javax.servlet.
javax.servlet.Filter
的形式运行Jersey servlet容器(2.x)描述符?我需要在提供服务的同时提供静态资源,因此需要使用jersey.config.servlet.filter.forwardOn404
或jersey.config.servlet.filter.staticContentRegex
,它们仅在根据Javadoc作为过滤器运行时才起作用
该属性仅在Jersey servlet容器配置为作为javax.servlet.Filter运行时适用,否则将忽略该属性
我想彻底摆脱web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<display-name>My-Webservice</display-name>
<filter>
<filter-name>Jersey Filter</filter-name>
<filter-class>org.glassfish.jersey.servlet.ServletContainer</filter-class>
<init-param>
<param-name>javax.ws.rs.Application</param-name>
<param-value>com.foo.webservices.MyApplication</param-value>
</init-param>
</filter>
</web-app>
遗憾的是,官方文档()没有说明任何有关过滤器的内容。这是可能的,但不会像设置一些配置属性那样简单。如果你能稍微了解一下它的实际工作原理,这会有所帮助。在Servlet3.x中,引入了一个ServletContainerInitializer
,我们可以实现它来动态加载Servlet(这将进一步讨论)。Jersey有一个它使用的实现。但它遵循JAX-RS,即应用程序应作为servlet加载。所以泽西并没有提供任何方法来解决这个问题
我们可以编写自己的ServletContainerInitializer
,也可以直接访问Jersey的。泽西岛有一个我们可以实现的SerletContainerProvider
。我们需要自己注册servlet过滤器。实现看起来像这样
@Override
public void preInit(ServletContext context, Set<Class<?>> classes) throws ServletException {
final Class<? extends Application> applicationCls = getApplicationClass(classes);
if (applicationCls != null) {
final ApplicationPath appPath = applicationCls.getAnnotation(ApplicationPath.class);
if (appPath == null) {
LOGGER.warning("Application class is not annotated with ApplicationPath");
return;
}
final String mapping = createMappingPath(appPath);
addFilter(context, applicationCls, classes, mapping);
// to stop Jersey servlet initializer from trying to register another servlet
classes.remove(applicationCls);
}
}
private static void addFilter(ServletContext context, Class<? extends Application> cls,
Set<Class<?>> classes, String mapping) {
final ResourceConfig resourceConfig = ResourceConfig.forApplicationClass(cls, classes);
final ServletContainer filter = new ServletContainer(resourceConfig);
final FilterRegistration.Dynamic registration = context.addFilter(cls.getName(), filter);
registration.addMappingForUrlPatterns(null, true, mapping);
registration.setAsyncSupported(true);
}
它应该位于类路径的根。该文件的内容应该是我们实现的完全限定名
您可以在这个中看到一个完整的示例。非常好的答案,谢谢。我不得不在getApplicationClass方法中添加另一个检查,因为它错误地将
org.glassfish.jersey.server.ResourceConfig$RuntimeConfig
标识为应用程序类。我刚刚在break
语句周围添加了if(applicationCls!=null&&applicationCls.getAnnotation(ApplicationPath.class)!=null)
。
@Override
public void preInit(ServletContext context, Set<Class<?>> classes) throws ServletException {
final Class<? extends Application> applicationCls = getApplicationClass(classes);
if (applicationCls != null) {
final ApplicationPath appPath = applicationCls.getAnnotation(ApplicationPath.class);
if (appPath == null) {
LOGGER.warning("Application class is not annotated with ApplicationPath");
return;
}
final String mapping = createMappingPath(appPath);
addFilter(context, applicationCls, classes, mapping);
// to stop Jersey servlet initializer from trying to register another servlet
classes.remove(applicationCls);
}
}
private static void addFilter(ServletContext context, Class<? extends Application> cls,
Set<Class<?>> classes, String mapping) {
final ResourceConfig resourceConfig = ResourceConfig.forApplicationClass(cls, classes);
final ServletContainer filter = new ServletContainer(resourceConfig);
final FilterRegistration.Dynamic registration = context.addFilter(cls.getName(), filter);
registration.addMappingForUrlPatterns(null, true, mapping);
registration.setAsyncSupported(true);
}
META-INF/services/org.glassfish.jersey.servlet.internal.spi.ServletContainerProvider