java快取機制 Redis / ehcache

阿新 • • 發佈：2019-02-20

首先了解一下這兩種快取機制的區別

ehcache直接在jvm虛擬機器中快取，速度快，效率高；但是快取共享麻煩，叢集分散式應用不方便。
redis是通過socket訪問到快取服務，效率比ecache低，比資料庫要快很多，處理叢集和分散式快取方便。適合應用於各個系統間快取共享，以及資料持久化機制（RDB、AOF兩種資料持久化機制）利於資料安全問題。

接下來是系統整合 ehcache.xml

<?xml version="1.0" encoding="UTF-8"?>
<ehcache updateCheck="false" name="defaultCache">
    <!-- 快取檔案路徑 -->
	<diskStore path="../temp/hema/ehcache" /> 

	<!-- 預設快取配置. -->
	<defaultCache maxEntriesLocalHeap="100" eternal="false" timeToIdleSeconds="300" timeToLiveSeconds="600"
		overflowToDisk="true" maxEntriesLocalDisk="100000" />
	
	<!-- 系統快取 -->
	<cache name="sysCache" maxEntriesLocalHeap="100" eternal="true" overflowToDisk="true"/>
	
	<!-- 使用者快取 -->
	<cache name="userCache" maxEntriesLocalHeap="100" eternal="true" overflowToDisk="true"/>

	<!-- 工作流模組快取 -->
	<cache name="actCache" maxEntriesLocalHeap="100" eternal="true" overflowToDisk="true"/>
	
	<!-- 系統活動會話快取 -->
    <cache name="activeSessionsCache" maxEntriesLocalHeap="10000" overflowToDisk="true"
           eternal="true" timeToLiveSeconds="0" timeToIdleSeconds="0"
           diskPersistent="true" diskExpiryThreadIntervalSeconds="600"/>
 
    	
</ehcache>

配置檔案詳解

name：cache標識

maxElementsInMemory：設定基於記憶體的快取可存放物件的最大數目

maxElementOnDisk：設定基於硬碟的快取可存放物件的最大數目(現在不設定，基於硬碟IO也會比較耗費時間)

eternal：如果為true，表示物件永遠不會過期，此時會忽略tiemToldleSeconds和timeToLiveSeconds屬性，預設為false。

timeToldleSeconds：設定允許物件處於空間狀態的最長時間。當物件自動最近一次被訪問後，如果處於空閒狀態的時間超過了 timeToldleSeconds屬性值，這個物件就會過期。當物件過期，只有當eternal屬性為false，該屬性才有效。如果該屬性的值為0，那麼就表示該物件可以無限期地存於快取中。

timeToLiveSeconds必須大於timeToldleSeconds屬性，才有意義。不需要配置此項。

overflowToDisk:如果為true，表示當基於記憶體的快取中的物件數目達到了maxElementsInMemory界限後，會把溢位的物件寫到基於硬碟的快取中。

注意，如果快取的物件要寫入到硬碟中的話，則該物件必須時間了Serializable接口才行；

redis 配置，首先需要安裝Redis客戶端 jedis.xml配置如下（使用單個Redis 或者使用Redis叢集）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
		http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context-3.2.xsd"
	default-lazy-init="true">

	<description>Jedis Configuration</description>

    <!-- 載入配置屬性檔案 -->
	<context:property-placeholder ignore-unresolvable="true" location="classpath:redis.properties" />
	
	<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
		<property name="maxIdle" value="300" /> <!-- 最大能夠保持idel狀態的物件數  -->
		<property name="maxTotal" value="60000" /> <!-- 最大分配的物件數 -->
		<property name="testOnBorrow" value="true" /> <!-- 當呼叫borrow Object方法時，是否進行有效性檢查 -->
	</bean>
	
	<bean id="jedisPool" class="redis.clients.jedis.JedisPool">
		<constructor-arg index="0" ref="jedisPoolConfig" />
		<constructor-arg index="1" value="127.0.0.1" />
		<constructor-arg index="2" value="6379" type="int" />
	</bean>
	

<!-- redis 叢集連線方案 -->
	<bean name="genericObjectPoolConfig"             
            class="org.apache.commons.pool2.impl.GenericObjectPoolConfig">  
        <property name="maxWaitMillis" value="-1" />  
        <property name="maxTotal" value="8" />  
        <property name="minIdle" value="0" />  
        <property name="maxIdle" value="8" />  
    </bean>  
    <bean id="jedisCluster" class="com.jeeplus.common.redis.JedisClusterFactory">  
        <property name="connectionTimeout" value="3000" />  
        <property name="soTimeout" value="3000" />  
        <property name="maxRedirections" value="5" />  
        <property name="genericObjectPoolConfig" ref="genericObjectPoolConfig" />  
        <property name="jedisClusterNodes">  
            <set>  
                <value>127.0.0.1:7000</value>  
                <value>127.0.0.1:7001</value> 
                <value>127.0.0.1:7002</value> 
            </set>  
        </property>  
    </bean> 
    

</beans>

接下來將這兩個配置檔案交由 spring 管理。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context" 
	xmlns:jdbc="http://www.springframework.org/schema/jdbc"  
	xmlns:jee="http://www.springframework.org/schema/jee" 
	xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:util="http://www.springframework.org/schema/util" 
    xmlns:task="http://www.springframework.org/schema/task" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    	http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
		http://www.springframework.org/schema/context 
		http://www.springframework.org/schema/context/spring-context-4.0.xsd
		http://www.springframework.org/schema/jdbc 
		http://www.springframework.org/schema/jdbc/spring-jdbc-4.0.xsd
		http://www.springframework.org/schema/jee 
		http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
		http://www.springframework.org/schema/tx 
		http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
		http://www.springframework.org/schema/util 
		http://www.springframework.org/schema/util/spring-util-4.0.xsd
		http://www.springframework.org/schema/task 
		http://www.springframework.org/schema/task/spring-task-4.1.xsd"
	default-lazy-init="true">

   

	<!-- 快取配置 -->
	<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
		<property name="configLocation" value="classpath:ehcache.xml" />
	</bean>
	
    
    <import resource="jedis.xml"/>
  
</beans>

cache快取機制的工具類如下


package com.hema.common.utils;

import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;

/**
 * Cache工具類
 */
public class CacheUtils {
	
	private static CacheManager cacheManager = ((CacheManager)SpringContextHolder.getBean("cacheManager"));

	private static final String SYS_CACHE = "sysCache";

	/**
	 * 獲取SYS_CACHE快取
	 * @param key
	 * @return
	 */
	public static Object get(String key) {
		return get(SYS_CACHE, key);
	}
	
	/**
	 * 寫入SYS_CACHE快取
	 * @param key
	 * @return
	 */
	public static void put(String key, Object value) {
		put(SYS_CACHE, key, value);
	}
	
	/**
	 * 從SYS_CACHE快取中移除
	 * @param key
	 * @return
	 */
	public static void remove(String key) {
		remove(SYS_CACHE, key);
	}
	
	/**
	 * 獲取快取
	 * @param cacheName
	 * @param key
	 * @return
	 */
	public static Object get(String cacheName, String key) {
		Element element = getCache(cacheName).get(key);
		return element==null?null:element.getObjectValue();
	}

	/**
	 * 寫入快取
	 * @param cacheName
	 * @param key
	 * @param value
	 */
	public static void put(String cacheName, String key, Object value) {
		Element element = new Element(key, value);
		getCache(cacheName).put(element);
	}

	/**
	 * 從快取中移除
	 * @param cacheName
	 * @param key
	 */
	public static void remove(String cacheName, String key) {
		getCache(cacheName).remove(key);
	}
	
	/**
	 * 獲得一個Cache，沒有則建立一個。
	 * @param cacheName
	 * @return
	 */
	private static Cache getCache(String cacheName){
		Cache cache = cacheManager.getCache(cacheName);
		if (cache == null){
			cacheManager.addCache(cacheName);
			cache = cacheManager.getCache(cacheName);
			cache.getCacheConfiguration().setEternal(true);
		}
		return cache;
	}

	public static CacheManager getCacheManager() {
		return cacheManager;
	}
	
}

jedis 工具類如下（操作單客戶端），也可以通過bean型別或者beanName獲取到叢集jedisCluster。去操作叢集


package com.hema.common.utils;

import java.util.List;
import java.util.Map;
import java.util.Set;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;


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

/**
 * Jedis Cache 工具類
 * 
 */
public class JedisUtils {

	private static Logger logger = LoggerFactory.getLogger(JedisUtils.class);
	
	private static JedisPool jedisPool = SpringContextHolder.getBean(JedisPool.class);

	
	
	/**
	 * 獲取快取
	 * @param key 鍵
	 * @return 值
	 */
	public static String get(String key) {
		String value = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(key)) {
				value = jedis.get(key);
				value = StringUtils.isNotBlank(value) && !"nil".equalsIgnoreCase(value) ? value : null;
				logger.debug("get {} = {}", key, value);
			}
		} catch (Exception e) {
			logger.warn("get {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return value;
	}
	
	/**
	 * 獲取快取
	 * @param key 鍵
	 * @return 值
	 */
	public static Object getObject(String key) {
		Object value = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(getBytesKey(key))) {
				value = toObject(jedis.get(getBytesKey(key)));
				logger.debug("getObject {} = {}", key, value);
			}
		} catch (Exception e) {
			logger.warn("getObject {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return value;
	}
	
	/**
	 * 設定快取
	 * @param key 鍵
	 * @param value 值
	 * @param cacheSeconds 超時時間，0為不超時
	 * @return
	 */
	public static String set(String key, String value, int cacheSeconds) {
		String result = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.set(key, value);
			if (cacheSeconds != 0) {
				jedis.expire(key, cacheSeconds);
			}
			logger.debug("set {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("set {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 設定快取
	 * @param key 鍵
	 * @param value 值
	 * @param cacheSeconds 超時時間，0為不超時
	 * @return
	 */
	public static String setObject(String key, Object value, int cacheSeconds) {
		String result = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.set(getBytesKey(key), toBytes(value));
			if (cacheSeconds != 0) {
				jedis.expire(key, cacheSeconds);
			}
			logger.debug("setObject {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("setObject {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 獲取List快取
	 * @param key 鍵
	 * @return 值
	 */
	public static List<String> getList(String key) {
		List<String> value = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(key)) {
				value = jedis.lrange(key, 0, -1);
				logger.debug("getList {} = {}", key, value);
			}
		} catch (Exception e) {
			logger.warn("getList {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return value;
	}
	
	/**
	 * 獲取List快取
	 * @param key 鍵
	 * @return 值
	 */
	public static List<Object> getObjectList(String key) {
		List<Object> value = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(getBytesKey(key))) {
				List<byte[]> list = jedis.lrange(getBytesKey(key), 0, -1);
				value = Lists.newArrayList();
				for (byte[] bs : list){
					value.add(toObject(bs));
				}
				logger.debug("getObjectList {} = {}", key, value);
			}
		} catch (Exception e) {
			logger.warn("getObjectList {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return value;
	}
	
	/**
	 * 設定List快取
	 * @param key 鍵
	 * @param value 值
	 * @param cacheSeconds 超時時間，0為不超時
	 * @return
	 */
	public static long setList(String key, List<String> value, int cacheSeconds) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(key)) {
				jedis.del(key);
			}
			result = jedis.rpush(key, (String[])value.toArray());
			if (cacheSeconds != 0) {
				jedis.expire(key, cacheSeconds);
			}
			logger.debug("setList {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("setList {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 設定List快取
	 * @param key 鍵
	 * @param value 值
	 * @param cacheSeconds 超時時間，0為不超時
	 * @return
	 */
	public static long setObjectList(String key, List<Object> value, int cacheSeconds) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(getBytesKey(key))) {
				jedis.del(key);
			}
			List<byte[]> list = Lists.newArrayList();
			for (Object o : value){
				list.add(toBytes(o));
			}
			result = jedis.rpush(getBytesKey(key), (byte[][])list.toArray());
			if (cacheSeconds != 0) {
				jedis.expire(key, cacheSeconds);
			}
			logger.debug("setObjectList {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("setObjectList {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 向List快取中新增值
	 * @param key 鍵
	 * @param value 值
	 * @return
	 */
	public static long listAdd(String key, String... value) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.rpush(key, value);
			logger.debug("listAdd {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("listAdd {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 向List快取中新增值
	 * @param key 鍵
	 * @param value 值
	 * @return
	 */
	public static long listObjectAdd(String key, Object... value) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			List<byte[]> list = Lists.newArrayList();
			for (Object o : value){
				list.add(toBytes(o));
			}
			result = jedis.rpush(getBytesKey(key), (byte[][])list.toArray());
			logger.debug("listObjectAdd {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("listObjectAdd {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}

	/**
	 * 獲取快取
	 * @param key 鍵
	 * @return 值
	 */
	public static Set<String> getSet(String key) {
		Set<String> value = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(key)) {
				value = jedis.smembers(key);
				logger.debug("getSet {} = {}", key, value);
			}
		} catch (Exception e) {
			logger.warn("getSet {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return value;
	}
	
	/**
	 * 獲取快取
	 * @param key 鍵
	 * @return 值
	 */
	public static Set<Object> getObjectSet(String key) {
		Set<Object> value = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(getBytesKey(key))) {
				value = Sets.newHashSet();
				Set<byte[]> set = jedis.smembers(getBytesKey(key));
				for (byte[] bs : set){
					value.add(toObject(bs));
				}
				logger.debug("getObjectSet {} = {}", key, value);
			}
		} catch (Exception e) {
			logger.warn("getObjectSet {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return value;
	}
	
	/**
	 * 設定Set快取
	 * @param key 鍵
	 * @param value 值
	 * @param cacheSeconds 超時時間，0為不超時
	 * @return
	 */
	public static long setSet(String key, Set<String> value, int cacheSeconds) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(key)) {
				jedis.del(key);
			}
			result = jedis.sadd(key, (String[])value.toArray());
			if (cacheSeconds != 0) {
				jedis.expire(key, cacheSeconds);
			}
			logger.debug("setSet {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("setSet {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 設定Set快取
	 * @param key 鍵
	 * @param value 值
	 * @param cacheSeconds 超時時間，0為不超時
	 * @return
	 */
	public static long setObjectSet(String key, Set<Object> value, int cacheSeconds) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(getBytesKey(key))) {
				jedis.del(key);
			}
			Set<byte[]> set = Sets.newHashSet();
			for (Object o : value){
				set.add(toBytes(o));
			}
			result = jedis.sadd(getBytesKey(key), (byte[][])set.toArray());
			if (cacheSeconds != 0) {
				jedis.expire(key, cacheSeconds);
			}
			logger.debug("setObjectSet {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("setObjectSet {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 向Set快取中新增值
	 * @param key 鍵
	 * @param value 值
	 * @return
	 */
	public static long setSetAdd(String key, String... value) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.sadd(key, value);
			logger.debug("setSetAdd {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("setSetAdd {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}

	/**
	 * 向Set快取中新增值
	 * @param key 鍵
	 * @param value 值
	 * @return
	 */
	public static long setSetObjectAdd(String key, Object... value) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			Set<byte[]> set = Sets.newHashSet();
			for (Object o : value){
				set.add(toBytes(o));
			}
			result = jedis.rpush(getBytesKey(key), (byte[][])set.toArray());
			logger.debug("setSetObjectAdd {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("setSetObjectAdd {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 獲取Map快取
	 * @param key 鍵
	 * @return 值
	 */
	public static Map<String, String> getMap(String key) {
		Map<String, String> value = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(key)) {
				value = jedis.hgetAll(key);
				logger.debug("getMap {} = {}", key, value);
			}
		} catch (Exception e) {
			logger.warn("getMap {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return value;
	}
	
	/**
	 * 獲取Map快取
	 * @param key 鍵
	 * @return 值
	 */
	public static Map<String, Object> getObjectMap(String key) {
		Map<String, Object> value = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(getBytesKey(key))) {
				value = Maps.newHashMap();
				Map<byte[], byte[]> map = jedis.hgetAll(getBytesKey(key));
				for (Map.Entry<byte[], byte[]> e : map.entrySet()){
					value.put(StringUtils.toString(e.getKey()), toObject(e.getValue()));
				}
				logger.debug("getObjectMap {} = {}", key, value);
			}
		} catch (Exception e) {
			logger.warn("getObjectMap {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return value;
	}
	
	/**
	 * 設定Map快取
	 * @param key 鍵
	 * @param value 值
	 * @param cacheSeconds 超時時間，0為不超時
	 * @return
	 */
	public static String setMap(String key, Map<String, String> value, int cacheSeconds) {
		String result = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(key)) {
				jedis.del(key);
			}
			result = jedis.hmset(key, value);
			if (cacheSeconds != 0) {
				jedis.expire(key, cacheSeconds);
			}
			logger.debug("setMap {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("setMap {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 設定Map快取
	 * @param key 鍵
	 * @param value 值
	 * @param cacheSeconds 超時時間，0為不超時
	 * @return
	 */
	public static String setObjectMap(String key, Map<String, Object> value, int cacheSeconds) {
		String result = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(getBytesKey(key))) {
				jedis.del(key);
			}
			Map<byte[], byte[]> map = Maps.newHashMap();
			for (Map.Entry<String, Object> e : value.entrySet()){
				map.put(getBytesKey(e.getKey()), toBytes(e.getValue()));
			}
			result = jedis.hmset(getBytesKey(key), (Map<byte[], byte[]>)map);
			if (cacheSeconds != 0) {
				jedis.expire(key, cacheSeconds);
			}
			logger.debug("setObjectMap {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("setObjectMap {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 向Map快取中新增值
	 * @param key 鍵
	 * @param value 值
	 * @return
	 */
	public static String mapPut(String key, Map<String, String> value) {
		String result = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.hmset(key, value);
			logger.debug("mapPut {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("mapPut {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 向Map快取中新增值
	 * @param key 鍵
	 * @param value 值
	 * @return
	 */
	public static String mapObjectPut(String key, Map<String, Object> value) {
		String result = null;
		Jedis jedis = null;
		try {
			jedis = getResource();
			Map<byte[], byte[]> map = Maps.newHashMap();
			for (Map.Entry<String, Object> e : value.entrySet()){
				map.put(getBytesKey(e.getKey()), toBytes(e.getValue()));
			}
			result = jedis.hmset(getBytesKey(key), (Map<byte[], byte[]>)map);
			logger.debug("mapObjectPut {} = {}", key, value);
		} catch (Exception e) {
			logger.warn("mapObjectPut {} = {}", key, value, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 移除Map快取中的值
	 * @param key 鍵
	 * @param value 值
	 * @return
	 */
	public static long mapRemove(String key, String mapKey) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.hdel(key, mapKey);
			logger.debug("mapRemove {}  {}", key, mapKey);
		} catch (Exception e) {
			logger.warn("mapRemove {}  {}", key, mapKey, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 移除Map快取中的值
	 * @param key 鍵
	 * @param value 值
	 * @return
	 */
	public static long mapObjectRemove(String key, String mapKey) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.hdel(getBytesKey(key), getBytesKey(mapKey));
			logger.debug("mapObjectRemove {}  {}", key, mapKey);
		} catch (Exception e) {
			logger.warn("mapObjectRemove {}  {}", key, mapKey, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 判斷Map快取中的Key是否存在
	 * @param key 鍵
	 * @param value 值
	 * @return
	 */
	public static boolean mapExists(String key, String mapKey) {
		boolean result = false;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.hexists(key, mapKey);
			logger.debug("mapExists {}  {}", key, mapKey);
		} catch (Exception e) {
			logger.warn("mapExists {}  {}", key, mapKey, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 判斷Map快取中的Key是否存在
	 * @param key 鍵
	 * @param value 值
	 * @return
	 */
	public static boolean mapObjectExists(String key, String mapKey) {
		boolean result = false;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.hexists(getBytesKey(key), getBytesKey(mapKey));
			logger.debug("mapObjectExists {}  {}", key, mapKey);
		} catch (Exception e) {
			logger.warn("mapObjectExists {}  {}", key, mapKey, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 刪除快取
	 * @param key 鍵
	 * @return
	 */
	public static long del(String key) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(key)){
				result = jedis.del(key);
				logger.debug("del {}", key);
			}else{
				logger.debug("del {} not exists", key);
			}
		} catch (Exception e) {
			logger.warn("del {}", key, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}

	/**
	 * 刪除快取
	 * @param key 鍵
	 * @return
	 */
	public static long delObject(String key) {
		long result = 0;
		Jedis jedis = null;
		try {
			jedis = getResource();
			if (jedis.exists(getBytesKey(key))){
				result = jedis.del(getBytesKey(key));
				logger.debug("delObject {}", key);
			}else{
				logger.debug("delObject {} not exists", key);
			}
		} catch (Exception e) {
			logger.warn("delObject {}", key, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 快取是否存在
	 * @param key 鍵
	 * @return
	 */
	public static boolean exists(String key) {
		boolean result = false;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.exists(key);
			logger.debug("exists {}", key);
		} catch (Exception e) {
			logger.warn("exists {}", key, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}
	
	/**
	 * 快取是否存在
	 * @param key 鍵
	 * @return
	 */
	public static boolean existsObject(String key) {
		boolean result = false;
		Jedis jedis = null;
		try {
			jedis = getResource();
			result = jedis.exists(getBytesKey(key));
			logger.debug("existsObject {}", key);
		} catch (Exception e) {
			logger.warn("existsObject {}", key, e);
		} finally {
			returnResource(jedis);
		}
		return result;
	}

	/**
	 * 獲取資源
	 * @return
	 * @throws JedisException
	 */
	public static Jedis getResource() throws JedisException {
		Jedis jedis = null;
		try {
			jedis = jedisPool.getResource();
//			logger.debug("getResource.", jedis);
		} catch (JedisException e) {
			logger.warn("getResource.", e);
			returnBrokenResource(jedis);
			throw e;
		}
		return jedis;
	}

	/**
	 * 歸還資源
	 * @param jedis
	 * @param isBroken
	 */
	public static void returnBrokenResource(Jedis jedis) {
		if (jedis != null) {
			jedisPool.returnBrokenResource(jedis);
		}
	}
	
	/**
	 * 釋放資源
	 * @param jedis
	 * @param isBroken
	 */
	public static void returnResource(Jedis jedis) {
		if (jedis != null) {
			jedisPool.returnResource(jedis);
		}
	}

	/**
	 * 獲取byte[]型別Key
	 * @param key
	 * @return
	 */
	public static byte[] getBytesKey(Object object){
		if(object instanceof String){
    		return StringUtils.getBytes((String)object);
    	}else{
    		return ObjectUtils.serialize(object);
    	}
	}
	
	/**
	 * Object轉換byte[]型別
	 * @param key
	 * @return
	 */
	public static byte[] toBytes(Object object){
    	return ObjectUtils.serialize(object);
	}

	/**
	 * byte[]型轉換Object
	 * @param key
	 * @return
	 */
	public static Object toObject(byte[] bytes){
		return ObjectUtils.unserialize(bytes);
	}

}

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