redis代理实现 比较酷

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.concurrent.TimeoutException;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisCommands;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.exceptions.JedisException;

public class JedisProxy implements InvocationHandler {

        private final JedisPool jedisPool;

        public JedisProxy(JedisPool pool) {
                this.jedisPool = pool;
        }

        public static JedisCommands newInstance(JedisPool pool) {
                return (JedisCommands) Proxy.newProxyInstance(Jedis.class.getClassLoader(), Jedis.class.getInterfaces(), new JedisProxy(pool));
        }

        @Override
        public Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
                Object result;
                Jedis jedis = obtainJedis();
                try {
                        result = m.invoke(jedis, args);
                } catch (InvocationTargetException e) {
                        throw e.getTargetException();
                } catch (Exception e) {
                        throw new JedisException("Unexpected proxy invocation exception: " + e.getMessage(), e);
                } finally {
                        returnJedis(jedis);
                }
                return result;
        }

        private Jedis obtainJedis() {
                Jedis jedis;
                jedis = jedisPool.getResource();
                return jedis;
        }

        private void returnJedis(Jedis jedis) {
                try {
                        if (jedis.isConnected()) {
                                jedis.ping();
                                jedisPool.returnResource(jedis);
                        } else {
                                jedisPool.returnBrokenResource(jedis);
                        }
                } catch (JedisException e) {
                        jedisPool.returnBrokenResource(jedis);
                }
        }
}