Spring boot:Websphere Application Server 启动时自动启动应用程序?

Spring boot: Start an application automatically when Webshere Application Server starts?

假设我有一个 Spring 启动应用程序作为 WAR 部署到 Websphere Application Server (WAS)。此 WAR 包含一个守护进程,因此它 必须在 WAS 启动时立即启动(并且仅启动一次)。

但是,我仍然需要通过 http 请求来激活 SpringBoot Servlet。

现在我明白servlets的概念是作用于http请求,我还是想让它在appserver启动时自动启动。这使我的守护进程可以从独立 jar/main 移植到 war/webapp.

我尝试了 ServletContextListener,但是 contextInitalized 也只在第一个 http 请求时被调用。

我没有 web.xml (servlet 3)。

代码:

@SpringBootApplication
@WebListener
public class DemoApplication extends SpringBootServletInitializer implements ServletContextListener {

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        System.err.println("ONSTARTUP"); 
        super.onStartup(servletContext);
    }

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    } 

   @Override
   protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
      return application.sources(DemoApplication.class);
   }


    @Override
    public void contextInitialized(ServletContextEvent sce) {
        System.err.println("contextInitialized"); 
    }

    @Override
    public void contextDestroyed(ServletContextEvent arg0) {
        //
    }
}

和:

@Component
public class DemoRunner implements ApplicationRunner {

    @Override
    public void run(ApplicationArguments arg0) throws Exception {
        System.err.println("I AM RUNNING");
    }

}

当我开始 WAS 时,我首先得到这个:

Launching defaultServer (WebSphere Application Server
16.0.0.2/wlp-1.0.13.cl160220160526-2258) on Java HotSpot(TM) 64-Bit Server VM, version 1.7.0_79-b15 (en_US) 
[...]  
[AUDIT   ] CWWKT0016I: Web application available (default_host): http://localhost:9080/demo/ 
[AUDIT   ] CWWKZ0001I: Application test started in 17,282 seconds.

要启动我的 Spring 启动应用程序,我首先需要访问这个 link (http:/localhost:9080/demo/)。然后它开始滚动,从您在日志中看到的启动方法开始。但是我如何在不执行 http 请求的情况下开始呢?

[err] ONSTARTUP
  .   ____          _            __ _ _
 /\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.4.0.RELEASE)
2016-09-02 10:45:52.670  INFO 23716 --- [dPool-thread-48] com.example.DemoApplication              : Starting DemoApplication on [...]
2016-09-02 10:45:58.019  INFO 23716 --- [dPool-thread-48] o.s.c.support.DefaultLifecycleProcessor  : Starting beans in phase 0
[...]
[err] I AM RUNNING
[...]
2016-09-02 10:45:58.093  INFO 23716 --- [dPool-thread-48] com.example.DemoApplication              : Started DemoApplication in 6.372 seconds (JVM running for 31.549)
[...]
[err] contextInitialized
[err] contextInitialized

您可以通过自定义 spring dispatch servlet 来更改 loadOnStartup,这里是示例问题,您可以使用代码

@Bean
public static BeanFactoryPostProcessor beanFactoryPostProcessor() {
    return new BeanFactoryPostProcessor() {

        @Override
        public void postProcessBeanFactory(
                ConfigurableListableBeanFactory beanFactory) throws BeansException {
            BeanDefinition bean = beanFactory.getBeanDefinition(
                    DispatcherServletAutoConfiguration.DEFAULT_DISPATCHER_SERVLET_REGISTRATION_BEAN_NAME);

            bean.getPropertyValues().add("loadOnStartup", 1);
        }
    };
}

参考:

更新

好像有更简单的方法,你可以在application.properites

中配置

spring.mvc.servlet.load-on-startup=1