详解Spring Boot Oauth2缓存UserDetails到Ehcache

时间:2022-09-06 12:26:42

在spring中有一个类cachinguserdetailsservice实现了userdetailsservice接口,该类使用静态代理模式为userdetailsservice提供缓存功能。该类源码如下:

cachinguserdetailsservice.java

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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默认的usercache属性值为new nullusercache(),该对象并未实现缓存。因为我打算使用ehcache来缓存userdetails,所以需要使用spring的ehcachebasedusercache类,该类是usercache接口的实现类,主要是缓存操作。

缓存userdetails到ehcache的具体实现如下:

ehcache.xml

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<?xml version="1.0" encoding="utf-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
     xsi:nonamespaceschemalocation="http://ehcache.org/ehcache.xsd">
  <!-- 磁盘缓存位置 -->
  <diskstore path="java.io.tmpdir" />
 
  <cache name="usercache"
      maxelementsinmemory="0"
      eternal="true"
      overflowtodisk="true"
      diskpersistent="true"
      memorystoreevictionpolicy="lru">
  </cache>
</ehcache>

userdetailscacheconfig.java

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@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

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@autowired
private userdetailsservice userdetailsservice;

欢迎关注我的oauthserver项目,仅仅需要运行建表sql,修改数据库的连接配置,即可得到一个spring boot oauth2 server微服务。项目地址 https://github.com/jeesun/oauthserver

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。

原文链接:http://www.cnblogs.com/rainmer/p/9417108.html