一丶Jedis分布式（Sharding/shared 一致性哈希）
我们知道Memcached是完全基于分布式的集群，而Redis是Master-Slave的模式，如果想把Redis做成集群模式，其实无外乎就是多做
几套Master-Slave，每套Master-Slave完成各自的容灾处理，通过Client工具，完成一致性哈希。（PS:Memcached是
在Server端完成Sharding，Redis只能依靠各个Client做Sharding。但比较开心的是从3.0的正式版开始，Redis也会像
Memache一样开始支持Server端的集群）
shared一致性哈希采用以下方案：
1.Redis服务器节点划分：将每台服务器节点采用hash算法划分为160个虚拟节点(可以配置划分权重)
2.将划分虚拟节点采用TreeMap存储
3.对每个Redis服务器的物理连接采用LinkedHashMap存储
4.对Key or KeyTag 采用同样的hash算法，然后从TreeMap获取大于等于键hash值得节点，取最邻近
节点存储；当key的hash值大于虚拟节点hash值得最大值时，存入第一个虚拟节点
sharded采用的hash算法：MD5 和 MurmurHash两种；默认采用64位的MurmurHash算法；
<!-- redis相关的jar包 -->
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.8.0</version>
</dependency>
#最大分配的对象数
redis.pool.maxActive=1024
#最大能够保持idel状态的对象数
redis.pool.maxIdle=200
#当池内没有返回对象时，最大等待时间
redis.pool.maxWait=1000
#当调用borrow Object方法时，是否进行有效性检查
redis.pool.testOnBorrow=true
#当调用return Object方法时，是否进行有效性检查
redis.pool.testOnReturn=true
#IP
redis.ip=10.11.20.140
#Port
redis.port=6379
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd">
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxTotal" value="2048" />
<property name="maxIdle" value="200" />
<property name="numTestsPerEvictionRun" value="1024" />
<property name="timeBetweenEvictionRunsMillis" value="30000" />
<property name="minEvictableIdleTimeMillis" value="-1" />
<property name="softMinEvictableIdleTimeMillis" value="10000" />
<property name="maxWaitMillis" value="1500" />
<property name="testOnBorrow" value="true" />
<property name="testWhileIdle" value="true" />
<property name="testOnReturn" value="false" />
<property name="jmxEnabled" value="true" />
<property name="jmxNamePrefix" value="youyuan" />
<property name="blockWhenExhausted" value="false" />
</bean>
<bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool">
<constructor-arg index="0" ref="jedisPoolConfig" />
<constructor-arg index="1">
<list>
<bean name="slaver" class="redis.clients.jedis.JedisShardInfo">
<constructor-arg index="0" value="${redis.slaver.host}" />
<constructor-arg index="1" value="${redis.slaver.port}" type="int" />
</bean>
<bean name="master" class="redis.clients.jedis.JedisShardInfo">
<constructor-arg index="0" value="${redis.master.host}" />
<constructor-arg index="1" value="${redis.master.port}" type="int" />
</bean>
</list>
</constructor-arg>
</bean>
</beans>
package com.dongly.sssr.orm;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.ScanParams;
import redis.clients.jedis.ScanResult;
import redis.clients.jedis.ShardedJedis;
import redis.clients.jedis.ShardedJedisPool;
@Component
public class RedisUtil {
public static Logger logger = LoggerFactory.getLogger(RedisUtil.class);
@Autowired
private ShardedJedisPool shardedJedisPool;
/**
* 设置一个key的过期时间（单位：秒）
*
* @param key
* key值
* @param seconds
* 多少秒后过期
* @return 1：设置了过期时间 0：没有设置过期时间/不能设置过期时间
*/
public long expire(String key, int seconds) {
if (key == null || key.equals("")) {
return 0;
}
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.expire(key, seconds);
} catch (Exception ex) {
logger.error("EXPIRE error[key=" + key + " seconds=" + seconds + "]" + ex.getMessage(), ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return 0;
}
/**
* 设置一个key在某个时间点过期
*
* @param key
* key值
* @param unixTimestamp
* unix时间戳，从1970-01-01 00:00:00开始到现在的秒数
* @return 1：设置了过期时间 0：没有设置过期时间/不能设置过期时间
*/
public long expireAt(String key, long unixTimestamp) {
if (key == null || key.equals("")) {
return 0;
}
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.expireAt(key, unixTimestamp);
} catch (Exception ex) {
logger.error("EXPIRE error[key=" + key + " unixTimestamp=" + unixTimestamp + "]" + ex.getMessage(), ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return 0;
}
/**
* 截断一个List
*
* @param key
* 列表key
* @param start
* 开始位置 从0开始
* @param end
* 结束位置
* @return 状态码
*/
public String trimList(String key, long start, long end) {
if (key == null || key.equals("")) {
return "-";
}
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.ltrim(key, start, end);
} catch (Exception ex) {
logger.error("LTRIM 出错[key=" + key + " start=" + start + " end=" + end + "]" + ex.getMessage(), ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return "-";
}
/**
* 检查Set长度
*
* @param key
* @return
*/
public long countSet(String key) {
if (key == null) {
return 0;
}
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.scard(key);
} catch (Exception ex) {
logger.error("countSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return 0;
}
/**
* 添加到Set中（同时设置过期时间）
*
* @param key
* key值
* @param seconds
* 过期时间 单位s
* @param value
* @return 成功true
*/
public boolean addSet(String key, int seconds, String... value) {
boolean result = addSet(key, value);
if (result) {
long i = expire(key, seconds);
return i == 1;
}
return false;
}
/**
* 添加到Set中
*
* @param key
* @param value
* @return
*/
public boolean addSet(String key, String... value) {
if (key == null || value == null) {
return false;
}
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
shardedJedis.sadd(key, value);
return true;
} catch (Exception ex) {
logger.error("setList error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
/**
* @param key
* @param value
* @return 判断值是否包含在set中
*/
public boolean containsInSet(String key, String value) {
if (key == null || value == null) {
return false;
}
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.sismember(key, value);
} catch (Exception ex) {
logger.error("setList error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
/**
* 获取Set
*
* @param key
* @return
*/
public Set<String> getSet(String key) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.smembers(key);
} catch (Exception ex) {
logger.error("getList error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return null;
}
/**
* 从set中删除value
*
* @param key
* @return
*/
public boolean removeSetValue(String key, String... value) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
shardedJedis.srem(key, value);
return true;
} catch (Exception ex) {
logger.error("getList error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
/**
* 从list中删除value 默认count 1
*
* @param key
* @param values
* 值list
* @return
*/
public int removeListValue(String key, List<String> values) {
return removeListValue(key, 1, values);
}
/**
* 从list中删除value
*
* @param key
* @param count
* @param values
* 值list
* @return
*/
public int removeListValue(String key, long count, List<String> values) {
int result = 0;
if (values != null && values.size() > 0) {
for (String value : values) {
if (removeListValue(key, count, value)) {
result++;
}
}
}
return result;
}
/**
* 从list中删除value
*
* @param key
* @param count
* 要删除个数
* @param value
* @return
*/
public boolean removeListValue(String key, long count, String value) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
shardedJedis.lrem(key, count, value);
return true;
} catch (Exception ex) {
logger.error("getList error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
/**
* 截取List
*
* @param key
* @param start
* 起始位置
* @param end
* 结束位置
* @return
*/
public List<String> rangeList(String key, long start, long end) {
if (key == null || key.equals("")) {
return null;
}
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.lrange(key, start, end);
} catch (Exception ex) {
logger.error("rangeList 出错[key=" + key + " start=" + start + " end=" + end + "]" + ex.getMessage(), ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return null;
}
/**
* 检查List长度
*
* @param key
* @return
*/
public long countList(String key) {
if (key == null) {
return 0;
}
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.llen(key);
} catch (Exception ex) {
logger.error("countList error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return 0;
}
/**
* 添加到List中（同时设置过期时间）
*
* @param key
* key值
* @param seconds
* 过期时间 单位s
* @param value
* @return
*/
public boolean addList(String key, int seconds, String... value) {
boolean result = addList(key, value);
if (result) {
long i = expire(key, seconds);
return i == 1;
}
return false;
}
/**
* 添加到List
*
* @param key
* @param value
* @return
*/
public boolean addList(String key, String... value) {
if (key == null || value == null) {
return false;
}
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
shardedJedis.lpush(key, value);
return true;
} catch (Exception ex) {
logger.error("setList error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
/**
* 添加到List(只新增)
*
* @param key
* @param value
* @return
*/
public boolean addList(String key, List<String> list) {
if (key == null || list == null || list.size() == 0) {
return false;
}
for (String value : list) {
addList(key, value);
}
return true;
}
/**
* 获取List
*
* @param key
* @return
*/
public List<String> getList(String key) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.lrange(key, 0, -1);
} catch (Exception ex) {
logger.error("getList error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return null;
}
/**
* 设置HashSet对象
*
* @param domain
* 域名
* @param key
* 键值
* @param value
* Json String or String value
* @return
*/
public boolean setHSet(String domain, String key, String value) {
if (value == null)
return false;
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
shardedJedis.hset(domain, key, value);
return true;
} catch (Exception ex) {
logger.error("setHSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
/**
* 获得HashSet对象
*
* @param domain
* 域名
* @param key
* 键值
* @return Json String or String value
*/
public String getHSet(String domain, String key) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.hget(domain, key);
} catch (Exception ex) {
logger.error("getHSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return null;
}
/**
* 删除HashSet对象
*
* @param domain
* 域名
* @param key
* 键值
* @return 删除的记录数
*/
public long delHSet(String domain, String key) {
ShardedJedis shardedJedis = null;
long count = 0;
try {
shardedJedis = shardedJedisPool.getResource();
count = shardedJedis.hdel(domain, key);
} catch (Exception ex) {
logger.error("delHSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return count;
}
/**
* 删除HashSet对象
*
* @param domain
* 域名
* @param key
* 键值
* @return 删除的记录数
*/
public long delHSet(String domain, String... key) {
ShardedJedis shardedJedis = null;
long count = 0;
try {
shardedJedis = shardedJedisPool.getResource();
count = shardedJedis.hdel(domain, key);
} catch (Exception ex) {
logger.error("delHSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return count;
}
/**
* 判断key是否存在
*
* @param domain
* 域名
* @param key
* 键值
* @return
*/
public boolean existsHSet(String domain, String key) {
ShardedJedis shardedJedis = null;
boolean isExist = false;
try {
shardedJedis = shardedJedisPool.getResource();
isExist = shardedJedis.hexists(domain, key);
} catch (Exception ex) {
logger.error("existsHSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return isExist;
}
/**
* 全局扫描hset
*
* @param match
* field匹配模式
* @return
*/
public List<Map.Entry<String, String>> scanHSet(String domain, String match) {
ShardedJedis shardedJedis = null;
try {
int cursor = 0;
shardedJedis = shardedJedisPool.getResource();
ScanParams scanParams = new ScanParams();
scanParams.match(match);
Jedis jedis = shardedJedis.getShard(domain);
ScanResult<Map.Entry<String, String>> scanResult;
List<Map.Entry<String, String>> list = new ArrayList<Map.Entry<String, String>>();
do {
scanResult = jedis.hscan(domain, String.valueOf(cursor), scanParams);
list.addAll(scanResult.getResult());
cursor = Integer.parseInt(scanResult.getStringCursor());
} while (cursor > 0);
return list;
} catch (Exception ex) {
logger.error("scanHSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return null;
}
/**
* 返回 domain 指定的哈希集中所有字段的value值
*
* @param domain
* @return
*/
public List<String> hvals(String domain) {
ShardedJedis shardedJedis = null;
List<String> retList = null;
try {
shardedJedis = shardedJedisPool.getResource();
retList = shardedJedis.hvals(domain);
} catch (Exception ex) {
logger.error("hvals error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return retList;
}
/**
* 返回 domain 指定的哈希集中所有字段的key值
*
* @param domain
* @return
*/
public Set<String> hkeys(String domain) {
ShardedJedis shardedJedis = null;
Set<String> retList = null;
try {
shardedJedis = shardedJedisPool.getResource();
retList = shardedJedis.hkeys(domain);
} catch (Exception ex) {
logger.error("hkeys error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return retList;
}
/**
* 返回 domain 指定的哈希key值总数
*
* @param domain
* @return
*/
public long lenHset(String domain) {
ShardedJedis shardedJedis = null;
long retList = 0;
try {
shardedJedis = shardedJedisPool.getResource();
retList = shardedJedis.hlen(domain);
} catch (Exception ex) {
logger.error("hkeys error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return retList;
}
/**
* 设置排序集合
*
* @param key
* @param score
* @param value
* @return
*/
public boolean setSortedSet(String key, long score, String value) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
shardedJedis.zadd(key, score, value);
return true;
} catch (Exception ex) {
logger.error("setSortedSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
/**
* 获得排序集合
*
* @param key
* @param startScore
* @param endScore
* @param orderByDesc
* @return
*/
public Set<String> getSoredSet(String key, long startScore, long endScore, boolean orderByDesc) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
if (orderByDesc) {
return shardedJedis.zrevrangeByScore(key, endScore, startScore);
} else {
return shardedJedis.zrangeByScore(key, startScore, endScore);
}
} catch (Exception ex) {
logger.error("getSoredSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return null;
}
/**
* 计算排序长度
*
* @param key
* @param startScore
* @param endScore
* @return
*/
public long countSoredSet(String key, long startScore, long endScore) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
Long count = shardedJedis.zcount(key, startScore, endScore);
return count == null ? 0L : count;
} catch (Exception ex) {
logger.error("countSoredSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return 0L;
}
/**
* 删除排序集合
*
* @param key
* @param value
* @return
*/
public boolean delSortedSet(String key, String value) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
long count = shardedJedis.zrem(key, value);
return count > 0;
} catch (Exception ex) {
logger.error("delSortedSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
/**
* 获得排序集合
*
* @param key
* @param startRange
* @param endRange
* @param orderByDesc
* @return
*/
public Set<String> getSoredSetByRange(String key, int startRange, int endRange, boolean orderByDesc) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
if (orderByDesc) {
return shardedJedis.zrevrange(key, startRange, endRange);
} else {
return shardedJedis.zrange(key, startRange, endRange);
}
} catch (Exception ex) {
logger.error("getSoredSetByRange error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return null;
}
/**
* 获得排序打分
*
* @param key
* @return
*/
public Double getScore(String key, String member) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.zscore(key, member);
} catch (Exception ex) {
logger.error("getSoredSet error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return null;
}
public boolean set(String key, String value, int second) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
shardedJedis.setex(key, second, value);
return true;
} catch (Exception ex) {
logger.error("set error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
public boolean set(String key, String value) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
shardedJedis.set(key, value);
return true;
} catch (Exception ex) {
logger.error("set error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
public Object getValue(String key) {
Object ret = null;
ShardedJedis jedis = shardedJedisPool.getResource();
try {
// 去redis中取回序列化后的对象
byte[] obj = jedis.get(key.getBytes());
// 取回的对象反序列化
if (obj != null) {
ret = SerializeUtil.unserialize(obj);
}
} catch (Exception e) {
jedis.close();
} finally {
jedis.close();
}
return ret;
}
public String get(String key, String defaultValue) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.get(key) == null ? defaultValue : shardedJedis.get(key);
} catch (Exception ex) {
logger.error("get error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return defaultValue;
}
public boolean del(String key) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
shardedJedis.del(key);
return true;
} catch (Exception ex) {
logger.error("del error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return false;
}
public long incr(String key) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.incr(key);
} catch (Exception ex) {
logger.error("incr error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return 0;
}
public long decr(String key) {
ShardedJedis shardedJedis = null;
try {
shardedJedis = shardedJedisPool.getResource();
return shardedJedis.decr(key);
} catch (Exception ex) {
logger.error("incr error.", ex);
returnBrokenResource(shardedJedis);
} finally {
returnResource(shardedJedis);
}
return 0;
}
private void returnBrokenResource(ShardedJedis shardedJedis) {
if (shardedJedis == null) {
return;
}
try {
// 容错
shardedJedis.close();
//shardedJedisPool.returnBrokenResource(shardedJedis);
} catch (Exception e) {
logger.error("returnBrokenResource error.", e);
}
}
private void returnResource(ShardedJedis shardedJedis) {
try {
shardedJedis.close();
//shardedJedisPool.returnResource(shardedJedis);
} catch (Exception e) {
logger.error("returnResource error.", e);
}
}
}
package com.dongly.sssr.orm;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SerializeUtil {
private static Logger log = LoggerFactory.getLogger(SerializeUtil.class);
public static byte[] serialize(Object object) {
ObjectOutputStream oos = null;
ByteArrayOutputStream baos = null;
try {
// 序列化
baos = new ByteArrayOutputStream();
oos = new ObjectOutputStream(baos);
oos.writeObject(object);
byte[] bytes = baos.toByteArray();
return bytes;
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (oos != null) {
oos.close();
}
if (baos != null) {
baos.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return null;
}
public static Object unserialize(byte[] bytes) {
ByteArrayInputStream bais = null;
try {
// 反序列化
bais = new ByteArrayInputStream(bytes);
ObjectInputStream ois = new ObjectInputStream(bais);
return ois.readObject();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
注意：只测试了部分，如果使用请自测！！！
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