public class JedisBeanPostProcessor implements BeanPostProcessor {

@Autowired
ShardedJedisPool shardedJedisPool;

static final Logger logger = Logger.getLogger(JedisBeanPostProcessor.class);

@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
if (bean instanceof JedisManageSupport) {
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(bean.getClass());
enhancer.setCallback(new JedisInterceptor(shardedJedisPool, bean));
Object targetBean = enhancer.create();
return targetBean;
}
else {
return bean;
}
}

@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
return bean;
}
}

class JedisInterceptor implements MethodInterceptor {

static final Logger logger = Logger.getLogger(JedisInterceptor.class);

ShardedJedisPool pool;

Object src;

public JedisInterceptor(ShardedJedisPool pool, Object src) {
this.pool = pool;
this.src = src;
}

@Override
public Object intercept(Object target, Method method, Object[] arguments, MethodProxy methodProxy) throws Throwable {
Object result = null;
if (target instanceof JedisManageSupport) {
if (this.isDeclaredMethod(target, method)) {
ShardedJedis jedis = null;
try {
JedisManageSupport support = (JedisManageSupport) src;
jedis = pool.getResource();
support.setShardedJedis(jedis);
// logger.debug("调用之前注入jedis对象,method:" + method);
/**
* 下面代码可以使用 method.invoke(src,arguments)。 不能使用
* methodProxy.invokeSuper(target,arguments);
* 因为A类中用Autowired注入的属性，生成代理的子类B后,因为子类B是新建的类。从父类继承的属性没有被初始化，
* 使用methodProxy.invokeSuper（）执行是，会报空指针异常.
*/
result = methodProxy.invoke(src, arguments);
support.setShardedJedis(null);
}
catch (Exception e) {
pool.returnBrokenResource(jedis);
e.printStackTrace();
}
finally {
if (jedis != null) {
pool.returnResource(jedis);
}
// logger.debug("调用之后归还jedis对象,method:" + method);
}
}
else {
result = methodProxy.invoke(src, arguments);
}
}
else {
throw new Exception("使用该代理必须继承JedisManageSupport");
}
return result;
}

/**
* 是否是target类本身定义的非私有的方法，还是继承的父类
* @return true是target自己类的并且不是私有的的，
*/
private boolean isDeclaredMethod(Object target, Method arg1) {
Method temp = null;
try {
temp = target.getClass().getDeclaredMethod(arg1.getName(), arg1.getParameterTypes());
}
catch (SecurityException e) {
e.printStackTrace();
}
catch (NoSuchMethodException e) {
e.printStackTrace();
}
/**
* 不为null，并且是非私有的，返回true
*/
if (temp != null) {

return true;
}
else {
return false;
}
}
}

public abstract class JedisManageSupport {
ThreadLocalShardedJedis> jedisHolder = new ThreadLocalShardedJedis>();

public final ShardedJedis getShardedJedis() {
return jedisHolder.get();
}

public final void setShardedJedis(ShardedJedis jedis) {
jedisHolder.set(jedis);
}

/**
* 如果某个键不同单位之间也不会重复，可以使用这个方法生成redis的键
*/
public final byte[] assemKey(String baseKey) {
Assert.isTrue(StringUtils.isNotBlank(baseKey), "参数不能为空");
return baseKey.getBytes();
}

/**
* 根据tableName+prefix 构造唯一key与assemKey(String baseKey, String tableName)
* 规则一致
*/
public final byte[] assemKeyByPrefix(String tableName, String baseKey) {
Assert.isTrue(StringUtils.isNotBlank(baseKey), "参数不能为空");
Assert.isTrue(StringUtils.isNotBlank(tableName), "参数不能为空");
UnitInfo unit = WebService.getUnitInfo();
Assert.isTrue(unit != null, "单位信息获取不到");
return (tableName + "-" + unit.getPrefix() + "-" + baseKey).getBytes();
}

/**
*
* 不同前缀的表中可能有相同的键，同一个表中也可能是有重复的baseKey时，用这个生成redis的key 比如 用户信息表的
* username字段，不同的用户信息表允许重复的username，mooc_t_userinfo
* 也允许有相同的账号，所以生成redis的key时，需要用到单位的mooc_school 放入redis中
*/
public final byte[] assemKeyByFid(String tableName, String baseKey) {
UnitInfo unit = WebService.getUnitInfo();
Assert.isTrue(unit != null, "单位信息获取不到");
return (tableName + "-" + unit.getMoocSchool() + "-" + baseKey).getBytes();
}

}