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最近调了一下spring security的集群session共享，用到了自定义的SessionRegistry，却发现怎么也不工作，翻了翻stackoverfllow，也没找到靠谱的办法，最后自己debug，找到了问题所在
本文基于 Spring3.1.5,Spring security 2.0.4
最开始配置如下：
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<beans:bean id="sessionRegistry" class="com.shop.core.security.support.SessionRegistryImpl" scope="singleton"> <beans:property name="cacheManager" ref="cacheManager" /></beans:bean><bean:http auto-config="false" entry-point-ref="loginUrlEntryPoint">...<bean:concurrent-session-control max-sessions="200000" exception-if-maximum-exceeded="false" expired-url="/outline.htm" session-registry-alias="sessionRegistry" />...</bean:http> |
debug发现自定义的SessionRegistryImpl类也有载入，但是最终系统调用的仍然是原来的
org.springframework.security.concurrent.SessionRegistryImpl
通过阅读源代码发现了其中原因，解释见注释：
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public class ConcurrentSessionsBeanDefinitionParser implements BeanDefinitionParser { static final String ATT_EXPIRY_URL = "expired-url"; static final String ATT_MAX_SESSIONS = "max-sessions"; static final String ATT_EXCEPTION_IF_MAX_EXCEEDED = "exception-if-maximum-exceeded"; static final String ATT_SESSION_REGISTRY_ALIAS = "session-registry-alias"; static final String ATT_SESSION_REGISTRY_REF = "session-registry-ref"; public BeanDefinition parse(Element element, ParserContext parserContext) { CompositeComponentDefinition compositeDef = new CompositeComponentDefinition(element.getTagName(), parserContext.extractSource(element)); parserContext.pushContainingComponent(compositeDef); BeanDefinitionRegistry beanRegistry = parserContext.getRegistry();//这里通过session-registry-ref 去获取自定义的sessionregistry， String sessionRegistryId = element.getAttribute(ATT_SESSION_REGISTRY_REF); if (!StringUtils.hasText(sessionRegistryId)) { RootBeanDefinition sessionRegistry = new RootBeanDefinition(SessionRegistryImpl.class); beanRegistry.registerBeanDefinition(BeanIds.SESSION_REGISTRY, sessionRegistry); parserContext.registerComponent(new BeanComponentDefinition(sessionRegistry, BeanIds.SESSION_REGISTRY)); sessionRegistryId = BeanIds.SESSION_REGISTRY; } else { //注册默认ID // Register the default ID as an alias so that things like session fixation filter can access it beanRegistry.registerAlias(sessionRegistryId, BeanIds.SESSION_REGISTRY); } String registryAlias = element.getAttribute(ATT_SESSION_REGISTRY_ALIAS); if (StringUtils.hasText(registryAlias)) { beanRegistry.registerAlias(sessionRegistryId, registryAlias); } BeanDefinitionBuilder filterBuilder = BeanDefinitionBuilder.rootBeanDefinition(ConcurrentSessionFilter.class); filterBuilder.addPropertyValue("sessionRegistry", new RuntimeBeanReference(sessionRegistryId)); |
也即是说sessionRegistry在做初始化的时候，spring security用了beanRegistry去管理了自身默认的bean的实现，java培训时学到的东西。如果你要使用自定义的，就需要给出相应的配置以取代默认，在BeanIds抽象类里面定义了默认的实现别名，如果获取不到就去获取默认。
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public abstract class BeanIds { /** External alias for FilterChainProxy bean, for use in web.xml files */ public static final String SPRING_SECURITY_FILTER_CHAIN = "springSecurityFilterChain"; /** Package protected as end users shouldn‘t really be using this BFPP directly */ static final String INTERCEPT_METHODS_BEAN_FACTORY_POST_PROCESSOR = "_interceptMethodsBeanfactoryPP"; static final String CONTEXT_SOURCE_SETTING_POST_PROCESSOR = "_contextSettingPostProcessor"; static final String ENTRY_POINT_INJECTION_POST_PROCESSOR = "_entryPointInjectionBeanPostProcessor"; static final String USER_DETAILS_SERVICE_INJECTION_POST_PROCESSOR = "_userServiceInjectionPostProcessor"; static final String SESSION_REGISTRY_INJECTION_POST_PROCESSOR = "_sessionRegistryInjectionPostProcessor"; static final String FILTER_CHAIN_POST_PROCESSOR = "_filterChainProxyPostProcessor"; static final String FILTER_LIST = "_filterChainList"; public static final String JDBC_USER_DETAILS_MANAGER = "_jdbcUserDetailsManager"; public static final String USER_DETAILS_SERVICE = "_userDetailsService"; public static final String ANONYMOUS_PROCESSING_FILTER = "_anonymousProcessingFilter"; public static final String ANONYMOUS_AUTHENTICATION_PROVIDER = "_anonymousAuthenticationProvider"; public static final String BASIC_AUTHENTICATION_FILTER = "_basicAuthenticationFilter"; public static final String BASIC_AUTHENTICATION_ENTRY_POINT = "_basicAuthenticationEntryPoint"; public static final String SESSION_REGISTRY = "_sessionRegistry"; public static final String CONCURRENT_SESSION_FILTER = "_concurrentSessionFilter"; 所以我的配置里面只需要加上session-registry-ref就好了。。 <beans:bean id="sessionRegistry" class="com.shop.core.security.support.SessionRegistryImpl" scope="singleton"> <beans:property name="cacheManager" ref="cacheManager" /></beans:bean><bean:http auto-config="false" entry-point-ref="loginUrlEntryPoint">...<bean:concurrent-session-control max-sessions="200000" exception-if-maximum-exceeded="false" expired-url="/outline.htm" session-registry-alias="sessionRegistry" session-registry-ref="sessionRegistry"/>...</bean:http> |
关于spring security自定义sessionRegistry
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原文地址：http://www.cnblogs.com/jinshiyill/p/4635220.html
