ShiroDbRealm.java

package com.sobey.cmop.mvc.service.account;

import java.io.Serializable;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.cache.Cache;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.subject.SimplePrincipalCollection;
import org.apache.shiro.util.ByteSource;

import com.google.common.base.Objects;
import com.sobey.cmop.mvc.constant.AccountConstant;
import com.sobey.cmop.mvc.entity.Group;
import com.sobey.cmop.mvc.entity.User;
import com.sobey.framework.utils.Encodes;

/**
 * 自实现用户与权限查询.
 * 
 * @author liukai
 * 
 */
public class ShiroDbRealm extends AuthorizingRealm {

	private AccountService accountService;

	@Resource
	public void setAccountService(AccountService accountService) {
		this.accountService = accountService;
	}

	/**
	 * 认证回调函数, 登录时调用.
	 */
	@Override
	protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authcToken) throws AuthenticationException {

		UsernamePasswordToken token = (UsernamePasswordToken) authcToken;
		User user = accountService.findUserByLoginName(token.getUsername());
		token.setRememberMe(true);// 默认为自动登录.

		if (user != null) {
			byte[] salt = Encodes.decodeHex(user.getSalt());
			return new SimpleAuthenticationInfo(new ShiroUser(user.getId(), user.getLoginName(), user.getName()),
					user.getPassword(), ByteSource.Util.bytes(salt), getName());
		} else {
			return null;
		}
	}

	/**
	 * 授权查询回调函数, 进行鉴权但缓存中无用户的授权信息时调用.
	 */
	@Override
	protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {

		ShiroUser shiroUser = (ShiroUser) principals.getPrimaryPrincipal();

		User user = accountService.findUserByLoginName(shiroUser.loginName);

		if (user != null) {
			SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
			for (Group group : user.getGroupList()) {
				// 基于Permission的权限信息
				info.addStringPermissions(group.getPermissionList());
			}
			return info;
		} else {
			return null;
		}

	}

	/**
	 * 设定Password校验的Hash算法与迭代次数.
	 */
	@PostConstruct
	public void initCredentialsMatcher() {
		HashedCredentialsMatcher matcher = new HashedCredentialsMatcher(AccountConstant.HASH_ALGORITHM);
		matcher.setHashIterations(AccountConstant.HASH_INTERATIONS);
		setCredentialsMatcher(matcher);
	}

	/**
	 * 更新用户授权信息缓存.
	 */
	public void clearCachedAuthorizationInfo(String principal) {
		SimplePrincipalCollection principals = new SimplePrincipalCollection(principal, getName());
		clearCachedAuthorizationInfo(principals);
	}

	/**
	 * 清除所有用户授权信息缓存.
	 */
	public void clearAllCachedAuthorizationInfo() {
		Cache<Object, AuthorizationInfo> cache = getAuthorizationCache();
		if (cache != null) {
			for (Object key : cache.keys()) {
				cache.remove(key);
			}
		}
	}

	/**
	 * 自定义Authentication对象，使得Subject除了携带用户的登录名外还可以携带更多信息.
	 */
	public static class ShiroUser implements Serializable {
		private static final long serialVersionUID = -1181844008511965270L;
		public Integer id;
		public String loginName;
		public String name;

		public ShiroUser(Integer id, String loginName, String name) {
			this.id = id;
			this.loginName = loginName;
			this.name = name;
		}

		public String getName() {
			return name;
		}

		/**
		 * 本函数输出将作为默认的<shiro:principal/>输出.
		 */
		@Override
		public String toString() {
			return loginName;
		}

		/**
		 * 重载hashCode,只计算loginName;
		 */
		@Override
		public int hashCode() {
			return Objects.hashCode(loginName);
		}

		/**
		 * 重载equals,只计算loginName;
		 */
		@Override
		public boolean equals(Object obj) {
			if (this == obj) {
				return true;
			}
			if (obj == null) {
				return false;
			}
			if (getClass() != obj.getClass()) {
				return false;
			}
			ShiroUser other = (ShiroUser) obj;
			if (loginName == null) {
				if (other.loginName != null) {
					return false;
				}
			} else if (!loginName.equals(other.loginName)) {
				return false;
			}
			return true;
		}

	}
}