redission计数器实现，redisTemplate计数器

在redission 2.9.0版本之前是有BUG，在实现下面代码时，第一次是成功的，但是在第二次就会失败：

RedissonClient client;//client参考别的demo

RMapCache<String, Integer> mapCache = client.getMapCache("nameSpace");
mapCache.putIfAbsent("redisKey", 0, 1, TimeUnit.DAYS);//当不存在redisKey时，就放置这个redis，存在则不放置

在redission 2.9.0（3.4.1）版本之后修复BUG，多次操作是成功的：

		RedissonClient client = RedissonHolder.getClient();//具体实现参考别的demo

		RMapCache<String, Integer> mapCache = client.getMapCache("nameSpace",IntegerCodec.INSTANCE);

		String redisKey = channel + "-" + userId;

		mapCache.putIfAbsent("redisKey", 0, 1, TimeUnit.DAYS);

		logger.info("获取redis计数器：{}", redisKey);

		int incr = mapCache.addAndGet(redisKey, 1);//加1并获取计算后的值

　　参考pom:

         <dependency>

          	<groupId>org.redisson</groupId>

	        <artifactId>redisson</artifactId>

	        <version>3.4.1</version>

         </dependency>

　　可参考redis demo：

import java.io.IOException;

import java.io.InputStream;

import java.util.ResourceBundle;

import org.redisson.Redisson;

import org.redisson.api.RedissonClient;

import org.redisson.config.Config;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class RedissonHolder {

    private static final Logger LOGGER = LoggerFactory.getLogger(RedissonHolder.class);

    private static final RedissonHolder HOLDER = new RedissonHolder();

    private RedissonClient redisson;

    private RedissonHolder() {

        String location = ResourceBundle.getBundle("redisson").getString("redisson.json.location");

        InputStream inputStream = RedissonHolder.class.getClassLoader().getResourceAsStream(location);

        Config config = null;

        try {

            config = Config.fromJSON(inputStream);

        } catch (IOException e) {

            LOGGER.error("获取Redisson配置文件失败", e);

        }

        this.redisson = Redisson.create(config);

    }

    public static RedissonClient getClient() {

        return HOLDER.redisson;

    }

}

　　redisson.properties(等号后面全部换成一行) :

redisson.json.location ={"singleServerConfig":{"idleConnectionTimeout":10000,

"pingTimeout":1000,
"connectTimeout":10000,
"timeout":5000,
"retryAttempts":5,
"retryInterval":1500,
"reconnectionTimeout":3000,
"failedAttempts":3,
"password":"root",
"subscriptionsPerConnection":5,
"clientName":null,
"address":"redis://my.redis.com:6379",
"subscriptionConnectionMinimumIdleSize":1,
"subscriptionConnectionPoolSize":50,
"connectionMinimumIdleSize":10,
"connectionPoolSize":64,
"database":0,
"dnsMonitoring":false,
"dnsMonitoringInterval":5000
},
"threads":0,
"nettyThreads":0,
"codec":null,
"useLinuxNativeEpoll":false
}

　　基于 springboot 的 redisTemplate计数器

redisTemplate基本配置参考 http://www.cnblogs.com/tietazhan/p/7479585.html

然后就可以直接使用内部函数

redisTemplate.opsForHash().increment(H var1, HK var2, long var3)；

第一个为缓存key值，第二个为hashKey值，第三个为增量值。