我在Tomcat 7.0.34，Spring 3.2.3，Spring Security 3.2.0.RC1和Spring Social 1.1上有一个Web应用程序。
由于某种原因，Spring上下文被加载了两次。第一次加载完成后立即发生第二次加载。下面的日志显示了加载Root WebApplicationContext的Context Loader。一切正常进行，所有RequstMappingHandler都正确注册。然后立即重新刷新上下文。
我已经阅读了几个关于SO的解决方案，确保您不会同时加载配置作为Context Loader和DispatcherServlet的一部分，并测试了它的各种组合，但似乎没有修复它我也变成了代码盲。
我对此的所有测试都将我推向了仅用于容器和Spring组件的注释配置，但是配置类几乎是从github上的Spring Social示例中复制和粘贴的。虽然我已经在下面列出了SocialConfig.java的详细信息，但是在我实现Spring Social之前就已经出现了这个问题，但是如果不修复它就无法继续。
此外，混合xml（web.xml，security-app-context.xml）和注释配置存在问题。
我正在实现WebApplicationInitializer而不是web.xml
public class WebClientInitialiser implements WebApplicationInitializer {
public void onStartup(ServletContext container) throws ServletException {
// Create the 'root' Spring application context
AnnotationConfigWebApplicationContext appContext = new AnnotationConfigWebApplicationContext();
// Manage the lifecycle of the root application context
appContext.setConfigLocation("com.mycompany.webclient.config");
appContext.setServletContext(container);
container.addListener(new ContextLoaderListener(appContext));
container.addListener(new MyCompanyContextListener());
container.addFilter("springSecurityFilterChain", new DelegatingFilterProxy("springSecurityFilterChain"))
.addMappingForUrlPatterns(null, false, "/*");
// Register and map the dispatcher servlet
Dynamic dispatcher = container.addServlet("dispatcher", new DispatcherServlet(appContext));
dispatcher.addMapping("/");
dispatcher.setLoadOnStartup(1);
}
}
我的MainConfig.java
/**
* Main configuration class for the application.
* Turns on @Component scanning, loads externalized application properties
* and imports legacy security configuration
*/
@Configuration
@ComponentScan(basePackages = "com.mycompany.webclient", excludeFilters = { @Filter(Configuration.class) })
@PropertySource("classpath:wc.properties")
@ImportResource("/WEB-INF/spring/appServlet/security-app-context.xml")
public class MainConfig {
@Bean
public PropertySourcesPlaceholderConfigurer propertyPlaceHolderConfigurer() {
return new PropertySourcesPlaceholderConfigurer();
}
}
我的WebMvcConfig.java
@Configuration
@EnableWebMvc
public class WebMvcConfig extends WebMvcConfigurerAdapter {
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
@Bean
public MessageSource messageSource() {
ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
messageSource.setBasename("/WEB-INF/messages/messages");
return messageSource;
}
@Bean
public InternalResourceViewResolver viewResolver() {
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setPrefix("/WEB-INF/views/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
}
我的SocialConfig.java
@Configuration
@EnableSocial
public class SocialConfig implements SocialConfigurer {
private SocialUserDAO socialUserDao;
//
// SocialConfigurer implementation methods
//
@Override
public void addConnectionFactories(ConnectionFactoryConfigurer cfConfig, Environment env) {
String clientId="XXXXXX";
String clientSecret="XXXXX";
cfConfig.addConnectionFactory(new FacebookConnectionFactory(clientId, clientSecret));
}
@Override
public UserIdSource getUserIdSource() {
return new UserIdSource() {
@Override
public String getUserId() {
Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
if (authentication == null) {
throw new IllegalStateException("Unable to get a ConnectionRepository: no user signed in");
}
return authentication.getName();
}
};
}
@Override
public UsersConnectionRepository getUsersConnectionRepository(ConnectionFactoryLocator connectionFactoryLocator) {
return new HibernateUsersConnectionRepository(socialUserDao, connectionFactoryLocator, Encryptors.noOpText());
}
//
// API Binding Beans
//
@Bean
@Scope(value="request", proxyMode=ScopedProxyMode.INTERFACES)
public Facebook facebook(ConnectionRepository repository) {
Connection<Facebook> connection = repository.findPrimaryConnection(Facebook.class);
return connection != null ? connection.getApi() : null;
}
@Bean
@Scope(value="request", proxyMode=ScopedProxyMode.INTERFACES)
public Twitter twitter(ConnectionRepository repository) {
Connection<Twitter> connection = repository.findPrimaryConnection(Twitter.class);
return connection != null ? connection.getApi() : null;
}
@Bean
@Scope(value="request", proxyMode=ScopedProxyMode.INTERFACES)
public LinkedIn linkedin(ConnectionRepository repository) {
Connection<LinkedIn> connection = repository.findPrimaryConnection(LinkedIn.class);
return connection != null ? connection.getApi() : null;
}
//
// Web Controller and Filter Beans
//
@Bean
public ConnectController connectController(ConnectionFactoryLocator connectionFactoryLocator, ConnectionRepository connectionRepository) {
ConnectController connectController = new ConnectController(connectionFactoryLocator, connectionRepository);
connectController.addInterceptor(new PostToWallAfterConnectInterceptor());
connectController.addInterceptor(new TweetAfterConnectInterceptor());
return connectController;
}
@Bean
public ProviderSignInController providerSignInController(ConnectionFactoryLocator connectionFactoryLocator, UsersConnectionRepository usersConnectionRepository) {
return new ProviderSignInController(connectionFactoryLocator, usersConnectionRepository, new SimpleSignInAdapter(new HttpSessionRequestCache()));
}
@Bean
public DisconnectController disconnectController(UsersConnectionRepository usersConnectionRepository, Environment env) {
return new DisconnectController(usersConnectionRepository, env.getProperty("facebook.clientSecret"));
}
@Bean
public ReconnectFilter apiExceptionHandler(UsersConnectionRepository usersConnectionRepository, UserIdSource userIdSource) {
return new ReconnectFilter(usersConnectionRepository, userIdSource);
}
}
非常感谢任何帮助，评论和指示。
在每次上下文刷新开始时，此日志输出重复两次：
org.springframework.web.context.ContextLoader- Root WebApplicationContext: initialization started
org.springframework.web.context.support.AnnotationConfigWebApplicationContext- Refreshing Root WebApplicationContext: startup date [Mon Nov 25 22:43:39 GMT 2013]; root of context hierarchy
org.springframework.context.annotation.ClassPathBeanDefinitionScanner- JSR-330 'javax.inject.Named' annotation found and supported for component scanning
org.springframework.web.context.support.AnnotationConfigWebApplicationContext- Registering annotated classes: [class com.mycompany.webclient.config.WebMvcConfig,class com.mycompany.webclient.config.SocialConfig]
答案 0 :(得分：4)
您将相同的上下文传递给ContextLoaderListener和DispatcherServlet，因此这将触发加载配置两次。
您应该有2个单独的AnnotationConfigWebApplicationContext个实例，一个用于ContextLoaderListener加载所有通用bean（服务等），另一个用于DispatcherServlet加载与Web相关的内容。
public class WebClientInitialiser implements WebApplicationInitializer {
public void onStartup(ServletContext container) throws ServletException {
// Create the 'root' Spring application context
AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
rootContext.register(MainConfig.class);
// Manage the lifecycle of the root application context
container.addListener(new ContextLoaderListener(rootContext));
container.addListener(new MyCompanyContextListener());
container.addFilter("springSecurityFilterChain", new DelegatingFilterProxy("springSecurityFilterChain"))
.addMappingForUrlPatterns(null, false, "/*");
AnnotationConfigWebApplicationContext dispatcherContext = new AnnotationConfigWebApplicationContext();
dispatcherContext.register(WebMvcConfig.class, SocialConfig.class);
// Register and map the dispatcher servlet
Dynamic dispatcher = container.addServlet("dispatcher", new DispatcherServlet(dispatcherContext));
dispatcher.addMapping("/");
dispatcher.setLoadOnStartup(1);
}
}
像这样的东西。此外，您无需设置contextConfigLocation只需注册@Configuration注释类。设置ServletContext已经由Spring完成，所以不需要这样做。
关于您的配置的说明，PropertySourcesPlaceHolderConfigurer默认启用，因此无需再次在MainConfig课程中注册。
要考虑的另一件事是，现在可能您的应用程序失败（即您的@Controllers不再工作）。这是因为所有内容都在根应用程序上下文中，而@Controllers应该由DispatcherServlet加载。要解决此问题，您需要在@Controller中排除MainConfig次扫描，并在@Controller课程上启用WebMvcConfig扫描。