spring - 多个 EmbeddedServletContainerFactory beans

Question

我有一个使用 spring boot 创建并嵌入 tomcat 的工作 spring mvc。现在我想更改 tomcat 的一些默认设置，即 spring boot 自述文件中的端口 setSessionTimeout 等( http://projects.spring.io/spring-boot/docs/spring-boot/README.html ) 我复制了例子

即创建了一个类似于下面的类:现在当我启动我的 spring boot(building jar not war)时，我收到以下错误

无法启动嵌入式容器；嵌套异常是 org.springframework.context.ApplicationContextException:由于多个 EmbeddedServletContainerFactory bean 无法启动 EmbeddedWebApplicationContext:servletContainer、tomcatEmbeddedServletContainerFactory

我知道创建了两个 EmbeddedServletContainerFactory，但为什么我认为我声明的 EmbeddedServletContainerFactory 类型的任何 bean 都应该覆盖现有的默认值。如果我将 EmbeddedServletContainerFactory 从 servletContainer() 重命名为 tomcatEmbeddedServletContainerFactory() 错误消失了，但是我设置的端口不再是 8888，而是默认端口 8080。似乎它正在工作但不接受我的客户设置，即端口 8888

import java.util.concurrent.TimeUnit;
import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class TomcatEmbeded {

@Bean
public EmbeddedServletContainerFactory servletContainer() {
    TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory();
    factory.setPort(8888);
    factory.setSessionTimeout(5, TimeUnit.MINUTES);
    //factory.addErrorPages(new ErrorPage(HttpStatus.404, "/notfound.html");

    return factory;
}

}

Answer 1

好的，这就是我为解决问题所做的工作。我在我的类(class)周围放置了一堆系统输出，想看看什么叫什么，什么不叫。我看到我的客户 tomcat 类没有被调用。然后我删除了“@EnableAutoConfiguration”然后我看到打印了 TomcatEmbeded bean 的系统输出并且 tomcat 端口设置为 8888。我必须承认我不知道 @EnableAutoConfiguration 到底在做什么但是我尝试了几次这些步骤项目清理后，maven 清理，maven 重建以确保我没有犯任何错误。这是我在没有“@EnableAutoConfiguration”注释的情况下使用的应用程序类。希望这对某人有帮助。

@ComponentScan(basePackages = "org.syncServer")
@Configuration
@EnableWebSocketMessageBroker
public class Application extends SpringBootServletInitializer {


    @Bean
    public ServletRegistrationBean dispatcherRegistration() {

        System.out.println("SERVLET REGISTRATION");
        ServletRegistrationBean registration = new ServletRegistrationBean(dispatcherServlet());

        System.out.println("SERVLET REGISTERED NAME is: " + registration.getServletName().toString()); 
        //registration.setLoadOnStartup(1);    
        registration.addUrlMappings("/");


            return registration;
    }

    @Bean(name = DispatcherServletAutoConfiguration.DEFAULT_DISPATCHER_SERVLET_BEAN_NAME)
    public DispatcherServlet dispatcherServlet()
    {
        System.out.println("DISPATCHER INIT");

//      DispatcherServlet dispatcherServlet = new  DispatcherServlet();
//      System.out.println("SERVLET REGISTERED NAME is: " + dispatcherServlet.getServletName().toString());
//      return dispatcherServlet;
        return new DispatcherServlet();

    }

    @Bean
    protected ServletContextListener listener() {
        return new ServletContextListener() {
            @Override
            public void contextInitialized(ServletContextEvent sce) {
                System.out.println("SERVLET CONTEXT initialized");
                logger.info("SERVLET CONTEXT initialized");
            }

            @Override
            public void contextDestroyed(ServletContextEvent sce) {
                System.out.println("SERVLET CONTEXT initialized");
                logger.info("SERVLET CONTEXT destroyed");
            }
        };
    }



    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {

        SpringApplicationBuilder builder = new SpringApplicationBuilder(Application.class).child(TomcatEmbeded.class, MVCConfig.class, PersistenceConfig.class);
        return builder;
        //return application.sources(Application.class);
    }


    public static void main(String[] args) {



//        ApplicationContext ctx = new AnnotationConfigApplicationContext(Application.class);

        ApplicationContext ctx = SpringApplication.run(Application.class, args);

        System.out.println("PRINTING the beans provided by Spring Boot:");
        String[] beanNames = ctx.getBeanDefinitionNames();
        Arrays.sort(beanNames);
        for (String beanName : beanNames) {
            System.out.println(beanName);
        }




        System.out.println("PRINTING SELECTED VIEW RESOLVERS ORDER:");
        Map<String, ViewResolver> resolvers = ctx.getBeansOfType(org.springframework.web.servlet.ViewResolver.class);

        for (Entry<String, ViewResolver> entry : resolvers.entrySet()) {
            System.out.println("key=" + entry.getKey() + ", value=" + entry.getValue());

        }

//        InternalResourceViewResolver ire = ctx.getBean(InternalResourceViewResolver.class);
//        int order = ire.getOrder();
//        System.out.println("InternalResourceViewResolver Order is:" + order);

//        ThymeleafViewResolver tre = ctx.getBean(ThymeleafViewResolver.class);
//        int torder = tre.getOrder();
//        System.out.println("ThymeleafViewResolver Order is:" + torder);


    }





}