java快取機制 Redis / ehcache
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);
}
}