shiro 实例 并发登录篇

并发登录配置

<!-- 会话管理器 -->    <bean id="sessionManager"          class="org.apache.shiro.web.session.mgt.DefaultWebSessionManager">        <property name="globalSessionTimeout" value="1800000"/>        <property name="deleteInvalidSessions" value="true"/>        <property name="sessionValidationSchedulerEnabled" value="true" />        <property name="sessionValidationScheduler" ref="sessionValidationScheduler" />        <property name="sessionDAO" ref="sessionDAO" />        <property name="sessionIdCookieEnabled" value="true" />        <property name="sessionIdCookie" ref="sessionIdCookie" />        <property name="cacheManager" ref="cacheManager" />    </bean>    <bean id="sessionDAO" class="org.apache.shiro.session.mgt.eis.EnterpriseCacheSessionDAO">        <property name="sessionIdGenerator" ref="sessionIdGenerator" />        <property name="activeSessionsCacheName" value="shiro-activeSessionCache" />    </bean>    <bean id="sessionIdGenerator" class="org.apache.shiro.session.mgt.eis.JavaUuidSessionIdGenerator"/>    <!-- 会话验证调度器 -->    <bean id="sessionValidationScheduler" class="org.apache.shiro.session.mgt.ExecutorServiceSessionValidationScheduler">        <property name="interval" value="1800000" />        <property name="sessionManager" ref="sessionManager" />    </bean><!-- 安全管理器 -->    <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">        <property name="sessionManager" ref="sessionManager"/>        ....    </bean><!-- 自定义filter -->    <bean id="KickoutSessionControlFilter" class="com.zm.web_shiro.web.filter.KickoutSessionControlFilter" >        <property name="sessionManager" ref="sessionManager"/>        <property name="cacheManager" ref="cacheManager"/>        <property name="kickoutAfter" value="false"/>        <property name="maxSession" value="1"/>        <property name="kickoutUrl" value="/jsp/login.jsp?kickout=1"/>    </bean> <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">        <property name="securityManager" ref="securityManager"/>        <property name="loginUrl" value="/jsp/login.jsp"/>        <property name="unauthorizedUrl" value="/jsp/unauthorized.jsp"/>        <property name="filterChainDefinitions">            <value>                /index.jsp = anon                /unauthorized.jsp = anon                /jsp/login.jsp = anon                /jsp/admin.jsp = authc,KickoutSessionControlFilter                /jsp/user.jsp = user,KickoutSessionControlFilter                /login/doLogout = logout                /login/code = VcodeControlFilter                /login/** = accessControlFilter                /jsp/** = user,KickoutSessionControlFilter                <!-- 资源 -->                /css/** = anon                /js/** = anon            </value>        </property>        <property name="filters">            <map>                <entry key="accessControlFilter" value-ref="accessControlFilter" />                <entry key="KickoutSessionControlFilter" value-ref="KickoutSessionControlFilter" />                <entry key="VcodeControlFilter" value-ref="VcodeControlFilter" />            </map>        </property>    </bean>

接下来就是把配置中的KickoutSessionControlFilter实现了

public class KickoutSessionControlFilter extends AccessControlFilter {    private static final Logger log = LogManager.getLogger(KickoutSessionControlFilter.class);    private String kickoutUrl; //踢出后到的地址    private boolean kickoutAfter = false; //踢出之前登录的/之后登录的用户 默认踢出之前登录的用户    private int maxSession = 1; //同一个帐号最大会话数 默认1    private SessionManager sessionManager;    private Cache<String, Deque<Serializable>> cache;    public void setKickoutUrl(String kickoutUrl) {        this.kickoutUrl = kickoutUrl;    }    public void setKickoutAfter(boolean kickoutAfter) {        this.kickoutAfter = kickoutAfter;    }    public void setMaxSession(int maxSession) {        this.maxSession = maxSession;    }    public void setSessionManager(SessionManager sessionManager) {        this.sessionManager = sessionManager;    }    public void setCacheManager(CacheManager cacheManager) {        this.cache = cacheManager.getCache("shiro-kickout-session");    }    @Override    protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) throws Exception {        return false;    }    @Override    protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception {        Subject subject = getSubject(request, response);        if(!subject.isAuthenticated() && !subject.isRemembered()) {            //如果没有登录，直接进行之后的流程            return true;        }        Session session = subject.getSession();        String username = (String) subject.getPrincipal();        Serializable sessionId = session.getId();        log.info("username:" + username );        log.info("sessionId:" + sessionId );        //TODO 同步控制        Deque<Serializable> deque = cache.get(username);        log.info("deque:" + deque);        if(deque == null) {            deque = new LinkedList<Serializable>();            cache.put(username, deque);        }        //如果队列里没有此sessionId，且用户没有被踢出；放入队列        if(!deque.contains(sessionId) && session.getAttribute("kickout") == null) {            deque.push(sessionId);        }        //如果队列里的sessionId数超出最大会话数，开始踢人        while(deque.size() > maxSession) {            Serializable kickoutSessionId = null;            if(kickoutAfter) { //如果踢出后者                kickoutSessionId = deque.removeFirst();                log.info("kickoutAfter:" + kickoutAfter + ",踢出后者");            } else { //否则踢出前者                kickoutSessionId = deque.removeLast();                log.info("kickoutAfter:" + kickoutAfter + ",踢出前者");            }            try {                Session kickoutSession = sessionManager.getSession(new DefaultSessionKey(kickoutSessionId));                if(kickoutSession != null) {                    //设置会话的kickout属性表示踢出了                    kickoutSession.setAttribute("kickout", true);                    log.info("设置会话的kickout属性表示踢出了");                }            } catch (Exception e) {//ignore exception            }        }        //如果被踢出了，直接退出，重定向到踢出后的地址        if (session.getAttribute("kickout") != null) {            log.info("会话被踢出了");            //会话被踢出了            try {                subject.logout();                log.info("subject.logout(),登出并清理缓存");            } catch (Exception e) { //ignore            }            saveRequest(request);            WebUtils.issueRedirect(request, response, kickoutUrl);            return false;        }        return true;    }}

运行效果如下（挤人需要用到两个浏览器）：