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小編給大家分享一下Spring Boot Oauth2緩存UserDetails到Ehcache的示例分析,相信大部分人都還不怎么了解,因此分享這篇文章給大家參考一下,希望大家閱讀完這篇文章后大有收獲,下面讓我們一起去了解一下吧!
在Spring中有一個(gè)類CachingUserDetailsService實(shí)現(xiàn)了UserDetailsService接口,該類使用靜態(tài)代理模式為UserDetailsService提供緩存功能。該類源碼如下:
CachingUserDetailsService.java
public class CachingUserDetailsService implements UserDetailsService { private UserCache userCache = new NullUserCache(); private final UserDetailsService delegate; CachingUserDetailsService(UserDetailsService delegate) { this.delegate = delegate; } public UserCache getUserCache() { return this.userCache; } public void setUserCache(UserCache userCache) { this.userCache = userCache; } public UserDetails loadUserByUsername(String username) { UserDetails user = this.userCache.getUserFromCache(username); if (user == null) { user = this.delegate.loadUserByUsername(username); } Assert.notNull(user, "UserDetailsService " + this.delegate + " returned null for username " + username + ". This is an interface contract violation"); this.userCache.putUserInCache(user); return user; } }
CachingUserDetailsService默認(rèn)的userCache屬性值為new NullUserCache(),
該對(duì)象并未實(shí)現(xiàn)緩存。因?yàn)槲掖蛩闶褂肊hCache來緩存UserDetails,所以需要使用Spring的EhCacheBasedUserCache類,該類是UserCache接口的實(shí)現(xiàn)類,主要是緩存操作。
緩存UserDetails到Ehcache的具體實(shí)現(xiàn)如下:
ehcache.xml
<?xml version="1.0" encoding="UTF-8"?> <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"> <!-- 磁盤緩存位置 --> <diskStore path="java.io.tmpdir" /> <cache name="userCache" maxElementsInMemory="0" eternal="true" overflowToDisk="true" diskPersistent="true" memoryStoreEvictionPolicy="LRU"> </cache> </ehcache>
UserDetailsCacheConfig.java
@Slf4j @Configuration public class UserDetailsCacheConfig { @Autowired private CustomUserDetailsService customUserDetailsService; @Bean public UserCache userCache(){ try { EhCacheBasedUserCache userCache = new EhCacheBasedUserCache(); val cacheManager = CacheManager.getInstance(); val cache = cacheManager.getCache("userCache"); userCache.setCache(cache); return userCache; } catch (Exception e) { e.printStackTrace(); log.error(e.getMessage()); } return null; } @Bean public UserDetailsService userDetailsService(){ Constructor<CachingUserDetailsService> ctor = null; try { ctor = CachingUserDetailsService.class.getDeclaredConstructor(UserDetailsService.class); } catch (NoSuchMethodException e) { e.printStackTrace(); } Assert.notNull(ctor, "CachingUserDetailsService constructor is null"); ctor.setAccessible(true); CachingUserDetailsService cachingUserDetailsService = BeanUtils.instantiateClass(ctor, customUserDetailsService); cachingUserDetailsService.setUserCache(userCache()); return cachingUserDetailsService; } }
使用
@Autowired private UserDetailsService userDetailsService;
以上是“Spring Boot Oauth2緩存UserDetails到Ehcache的示例分析”這篇文章的所有內(nèi)容,感謝各位的閱讀!相信大家都有了一定的了解,希望分享的內(nèi)容對(duì)大家有所幫助,如果還想學(xué)習(xí)更多知識(shí),歡迎關(guān)注億速云行業(yè)資訊頻道!
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