WebServletInstaller.java 文件源码

@Override
public void install(final Environment environment, final HttpServlet instance) {
    final Class<? extends HttpServlet> extType = FeatureUtils.getInstanceClass(instance);
    final WebServlet annotation = FeatureUtils.getAnnotation(extType, WebServlet.class);
    final String[] patterns = annotation.urlPatterns().length > 0 ? annotation.urlPatterns() : annotation.value();
    Preconditions.checkArgument(patterns.length > 0,
            "Servlet %s not specified url pattern for mapping", extType.getName());
    final AdminContext context = FeatureUtils.getAnnotation(extType, AdminContext.class);
    final String name = WebUtils.getServletName(annotation, extType);
    reporter.line("%-15s %-5s %-2s (%s)   %s", Joiner.on(",").join(patterns),
            WebUtils.getAsyncMarker(annotation), WebUtils.getContextMarkers(context), extType.getName(), name);

    if (WebUtils.isForMain(context)) {
        configure(environment.servlets(), instance, extType, name, annotation);
    }
    if (WebUtils.isForAdmin(context)) {
        configure(environment.admin(), instance, extType, name, annotation);
    }
}