org.springframework.boot.web.servlet.ServletRegistrationBean#setLoadOnStartup ( )源码实例Demo

protected ServletRegistrationBean registerServlet(FlowableServlet servletProperties, Class<?> baseConfig) {
    AnnotationConfigWebApplicationContext dispatcherServletConfiguration = new AnnotationConfigWebApplicationContext();
    dispatcherServletConfiguration.setParent(applicationContext);
    dispatcherServletConfiguration.register(baseConfig);
    DispatcherServlet servlet = new DispatcherServlet(dispatcherServletConfiguration);
    String path = servletProperties.getPath();
    String urlMapping = (path.endsWith("/") ? path + "*" : path + "/*");
    ServletRegistrationBean registrationBean = new ServletRegistrationBean(servlet, urlMapping);
    registrationBean.setName(servletProperties.getName());
    registrationBean.setLoadOnStartup(servletProperties.getLoadOnStartup());
    registrationBean.setAsyncSupported(true);
    if (multipartConfigElement != null) {
        registrationBean.setMultipartConfig(multipartConfigElement);
    }
    return registrationBean;
}
 

@Bean
ServletRegistrationBean servletRegistrationBean(ServletMappingConfiguration config) {
    ServletRegistrationBean mapping = new ServletRegistrationBean();
    mapping.setServlet(new CamelHttpTransportServlet());
    mapping.addUrlMappings(config.getContextPath());
    mapping.setName(config.getServletName());
    mapping.setLoadOnStartup(1);

    return mapping;
}
 

@Bean
ServletRegistrationBean<HttpServlet30Dispatcher> keycloakJaxRsApplication(
		KeycloakServerProperties keycloakServerProperties, DataSource dataSource) throws Exception {

	mockJndiEnvironment(dataSource);
	EmbeddedKeycloakApplication.keycloakServerProperties = keycloakServerProperties;

	ServletRegistrationBean<HttpServlet30Dispatcher> servlet = new ServletRegistrationBean<>(
			new HttpServlet30Dispatcher());
	servlet.addInitParameter("javax.ws.rs.Application", EmbeddedKeycloakApplication.class.getName());
	servlet.addInitParameter(ResteasyContextParameters.RESTEASY_SERVLET_MAPPING_PREFIX,
			keycloakServerProperties.getContextPath());
	servlet.addInitParameter(ResteasyContextParameters.RESTEASY_USE_CONTAINER_FORM_PARAMS, "true");
	servlet.addUrlMappings(keycloakServerProperties.getContextPath() + "/*");
	servlet.setLoadOnStartup(1);
	servlet.setAsyncSupported(true);

	return servlet;
}
 

/**
 * This bean registers the {@link FacesServlet}.
 * <p>
 * This {@link ServletRegistrationBean} also sets two
 * {@link ServletContext#setAttribute(String, Object) servlet-context attributes} to inform Mojarra and MyFaces about
 * the dynamically added Servlet.
 *
 * @param facesServletProperties The properties for the {@link FacesServlet}-registration.
 *
 * @return A custom {@link ServletRegistrationBean} which registers the {@link FacesServlet}.
 */
@Bean
public ServletRegistrationBean<FacesServlet> facesServletRegistrationBean(
		FacesServletProperties facesServletProperties
) {
	ServletRegistrationBean<FacesServlet> facesServletServletRegistrationBean = new ServletRegistrationBean<FacesServlet>(new FacesServlet()) {
		@Override
		protected ServletRegistration.Dynamic addRegistration(String description, ServletContext servletContext) {
			ServletRegistration.Dynamic servletRegistration = super.addRegistration(description, servletContext);
			if (servletRegistration != null) {
				servletContext.setAttribute("org.apache.myfaces.DYNAMICALLY_ADDED_FACES_SERVLET", true);
				servletContext.setAttribute("com.sun.faces.facesInitializerMappingsAdded", true);
			}
			return servletRegistration;
		}
	};

	facesServletServletRegistrationBean.setName(facesServletProperties.getName());
	facesServletServletRegistrationBean.setUrlMappings(facesServletProperties.getUrlMappings());
	facesServletServletRegistrationBean.setLoadOnStartup(facesServletProperties.getLoadOnStartup());
	facesServletServletRegistrationBean.setEnabled(facesServletProperties.isEnabled());
	facesServletServletRegistrationBean.setAsyncSupported(facesServletProperties.isAsyncSupported());
	facesServletServletRegistrationBean.setOrder(facesServletProperties.getOrder());

	return facesServletServletRegistrationBean;
}
 

@Bean(name = "hystrixRegistrationBean")
public ServletRegistrationBean servletRegistrationBean() {
    ServletRegistrationBean registration = new ServletRegistrationBean(
            new HystrixMetricsStreamServlet(), "/hystrix.stream");
    registration.setName("hystrixServlet");
    registration.setLoadOnStartup(1);
    return registration;
}
 

@Bean
public ServletRegistrationBean getServlet() {
    HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
    ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
    registrationBean.setLoadOnStartup(1);
    registrationBean.addUrlMappings("/hystrix.stream");
    registrationBean.setName("HystrixMetricsStreamServlet");
    return registrationBean;
}
 

/**
 *
 * 地址/hystrix
 */
@Bean
public ServletRegistrationBean getServlet() {
    HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
    ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);  //Spring boot 以代码的方式装载servlet
    registrationBean.setLoadOnStartup(1); //设置启动顺序
    registrationBean.addUrlMappings("/hystrix.stream");
    registrationBean.setName("HystrixMetricsStreamServlet");
    return registrationBean;
}
 

public ServletRegistrationBean routeServlet1(RouterFunction<?> routerFunction) throws Exception {
HttpHandler httpHandler = RouterFunctions.toHttpHandler(routerFunction );
ServletHttpHandlerAdapter servlet = new ServletHttpHandlerAdapter(httpHandler);

     ServletRegistrationBean registrationBean = new ServletRegistrationBean<>(servlet, "/flux" + "/*");
     registrationBean.setLoadOnStartup(1);
     registrationBean.setAsyncSupported(true);
     
 	System.out.println("starts server");		
     return registrationBean;
 }
 

@Bean("gitServletBean")
public ServletRegistrationBean<GitServlet> gitServletBean(Path pluginDir, PluginRepoResolver pluginRepoResolver) {
    GitServlet servlet = new GitServlet();
    servlet.setRepositoryResolver(pluginRepoResolver);

    ServletRegistrationBean<GitServlet> bean = new ServletRegistrationBean<>(servlet, GIT_URL + "/*");
    bean.setLoadOnStartup(1);
    bean.addInitParameter("base-path", pluginDir.toString());
    bean.addInitParameter("export-all", "true");
    bean.setAsyncSupported(true);
    return bean;
}
 

@Bean
public ServletRegistrationBean getServlet() {
	HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
	ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
	registrationBean.setLoadOnStartup(1);
	registrationBean.addUrlMappings("/hystrix.stream");
	registrationBean.setName("HystrixMetricsStreamServlet");
	return registrationBean;
}
 

@Bean(name = "hystrixForTurbineRegistrationBean")
public ServletRegistrationBean servletTurbineRegistrationBean() {
    ServletRegistrationBean registration = new ServletRegistrationBean(
            new HystrixMetricsStreamServlet(), "/actuator/hystrix.stream");
    registration.setName("hystrixForTurbineServlet");
    registration.setLoadOnStartup(1);
    return registration;
}
 

@Bean
public ServletRegistrationBean getServlet() {
  HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
  ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
  registrationBean.setLoadOnStartup(1);
  registrationBean.addUrlMappings("/hystrix.stream");
  registrationBean.setName("HystrixMetricsStreamServlet");
  return registrationBean;
}
 

public ServletRegistrationBean routeServlet1(RouterFunction<?> routerFunction) throws Exception {
HttpHandler httpHandler = RouterFunctions.toHttpHandler(routerFunction );
ServletHttpHandlerAdapter servlet = new ServletHttpHandlerAdapter(httpHandler);

     ServletRegistrationBean registrationBean = new ServletRegistrationBean<>(servlet, "/flux" + "/*");
     registrationBean.setLoadOnStartup(1);
     registrationBean.setAsyncSupported(true);
     
 	System.out.println("starts server");		
     return registrationBean;
 }
 

@Bean
public ServletRegistrationBean apiDispatcher() {
    DispatcherServlet api = new DispatcherServlet();
    api.setContextClass(AnnotationConfigWebApplicationContext.class);
    api.setContextConfigLocation(ApiDispatcherServletConfiguration.class.getName());
    ServletRegistrationBean registrationBean = new ServletRegistrationBean();
    registrationBean.setServlet(api);
    registrationBean.addUrlMappings("/api/*"); // api下面的所有内容都访问到这里
    registrationBean.setLoadOnStartup(1);
    registrationBean.setAsyncSupported(true);
    registrationBean.setName("api"); // 不能重复，重复则以最后一个设置的为准

    return registrationBean;
}
 

@Bean(name = "hystrixForTurbineRegistrationBean")
public ServletRegistrationBean servletTurbineRegistrationBean() {
    ServletRegistrationBean registration = new ServletRegistrationBean(
            new HystrixMetricsStreamServlet(), "/actuator/hystrix.stream");
    registration.setName("hystrixForTurbineServlet");
    registration.setLoadOnStartup(1);
    return registration;
}
 

public ServletRegistrationBean routeServlet1(RouterFunction<?> routerFunction) throws Exception {
HttpHandler httpHandler = RouterFunctions.toHttpHandler(routerFunction );
ServletHttpHandlerAdapter servlet = new ServletHttpHandlerAdapter(httpHandler);

     ServletRegistrationBean registrationBean = new ServletRegistrationBean<>(servlet, "/flux" + "/*");
     registrationBean.setLoadOnStartup(1);
     registrationBean.setAsyncSupported(true);
     
 	System.out.println("starts server");		
     return registrationBean;
 }
 

public ServletRegistrationBean routeServlet1(RouterFunction<?> routerFunction) throws Exception {
HttpHandler httpHandler = RouterFunctions.toHttpHandler(routerFunction );
ServletHttpHandlerAdapter servlet = new ServletHttpHandlerAdapter(httpHandler);

     ServletRegistrationBean registrationBean = new ServletRegistrationBean<>(servlet, "/flux" + "/*");
     registrationBean.setLoadOnStartup(1);
     registrationBean.setAsyncSupported(true);
     
 	System.out.println("starts server");		
     return registrationBean;
 }
 

public ServletRegistrationBean routeServlet1(RouterFunction<?> routerFunction) throws Exception {
HttpHandler httpHandler = RouterFunctions.toHttpHandler(routerFunction );
ServletHttpHandlerAdapter servlet = new ServletHttpHandlerAdapter(httpHandler);

     ServletRegistrationBean registrationBean = new ServletRegistrationBean<>(servlet, "/flux" + "/*");
     registrationBean.setLoadOnStartup(1);
     registrationBean.setAsyncSupported(true);
     
 	System.out.println("starts server");		
     return registrationBean;
 }
 

@Bean(name = "hystrixRegistrationBean")
public ServletRegistrationBean servletRegistrationBean() {
    ServletRegistrationBean registration = new ServletRegistrationBean(
            new HystrixMetricsStreamServlet(), "/hystrix.stream");
    registration.setName("hystrixServlet");
    registration.setLoadOnStartup(1);
    return registration;
}
 

@Bean
public ServletRegistrationBean repositoryServletRegistrationBean(
    RepositoryHttpServlet repositoryHttpServlet) {

  ServletRegistrationBean servletRegistrationBean =
      new ServletRegistrationBean(repositoryHttpServlet, "/repository_servlet/*");
  servletRegistrationBean.setLoadOnStartup(1);

  return servletRegistrationBean;
}