AuthenticatingSecurityManager抽象类

AuthenticatingSecurityManager抽象类继承于RealmSecurityManager抽象类，先对其解析如下：

1.RealmSecurityManager抽象类

此抽象类可以参照RealmSecurityManager抽象类源码解析。

2.AuthenticatingSecurityManager抽象类

2.1.数据属性

private Authenticator authenticator;//认证类

2.2.构造方法(设置默认认证器)

public AuthenticatingSecurityManager() {
        super();
        this.authenticator = new ModularRealmAuthenticator();
}

2.3.获取认证器

public Authenticator getAuthenticator() {
        return authenticator;
}

2.4.设置认证器(如果认证器为空，则抛出异常)

public void setAuthenticator(Authenticator authenticator) throws IllegalArgumentException {
        if (authenticator == null) {
            String msg = "Authenticator argument cannot be null.";
            throw new IllegalArgumentException(msg);
        }
        this.authenticator = authenticator;
 }

2.5.设置完realm之后的操作(将所有的realm设置缓存管理器，如果认证器为默认的认证器，则设置认证器的realm为获取的realm,此方法覆盖了RealmSecurityManager里面的方法)

protected void afterRealmsSet() {
        super.afterRealmsSet();
        if (this.authenticator instanceof ModularRealmAuthenticator) {
            ((ModularRealmAuthenticator) this.authenticator).setRealms(getRealms());
        }
 }

2.6.认证操作

public AuthenticationInfo authenticate(AuthenticationToken token) throws AuthenticationException {
        return this.authenticator.authenticate(token);
}

2.7.销毁操作

public void destroy() {
        LifecycleUtils.destroy(getAuthenticator());
        this.authenticator = null;
        super.destroy();
    }