com.base4j.cache.store.redis.RedisCache Maven / Gradle / Ivy
package com.base4j.cache.store.redis;
import java.util.ArrayList;
import java.util.List;
import org.springframework.util.StringUtils;
import com.base4j.cache.CacheException;
import com.base4j.cache.serializer.SerializerTools;
import com.base4j.cache.store.SuperCache;
import com.base4j.cache.store.SuperCacheProvider;
import com.base4j.cache.utils.CacheCodeUtils;
import redis.clients.jedis.Jedis;
/**
* 缓存的Redis实现
*/
public class RedisCache extends SuperCache {
private String region;
public RedisCache(String region) {
this.region = region;
}
@Override
public Object gets(Object key) throws CacheException {
Object result = null;
// 取得连接实例
Jedis jedis = SuperCacheProvider.getResource();
if (jedis == null || StringUtils.isEmpty(key)) {
return null;
}
try {
// 1.如果确定了返回是字符串类型，就使用这个，但是这样会比较喽
// 2.如果需要自定义序列化实现使用下面的方法
byte[] b = jedis.get(SerializerTools.serializeKey(CacheCodeUtils.createRedisKey(region, key)));
if (b != null) {
// your serialization utils
result = SerializerTools.deserializeValue(b);
}
} catch (Exception e) {
// 如果抛出了异常，打印日志并销毁该缓存
if(e instanceof NullPointerException) {
evict(key);
}
} finally {
// 造作完成后将连接实例放回到线程池
SuperCacheProvider.returnResource(jedis);
}
return result;
}
@Override
public void put(Object key, Object value) throws CacheException {
if (value == null) {
evict(key);
} else {
Jedis jedis = SuperCacheProvider.getResource();
// 将数据保存到缓存容器，1.key序列化，2.value序列化
try {
jedis.set(SerializerTools.serializeKey(CacheCodeUtils.createRedisKey(region, key)), SerializerTools.serializeValue(value));
} catch (Exception e) {
throw new CacheException(e);
} finally {
SuperCacheProvider.returnResource(jedis);
}
}
}
@Override
public void evict(Object key) throws CacheException {
Jedis jedis = SuperCacheProvider.getResource();
try {
jedis.del(SerializerTools.serializeKey(CacheCodeUtils.createRedisKey(region, key)));
} catch (Exception e) {
throw new CacheException(e);
} finally {
SuperCacheProvider.returnResource(jedis);
}
}
@Override
public void evict(List keys) throws CacheException {
if(keys == null || keys.size() == 0) {
return ;
}
Jedis jedis = SuperCacheProvider.getResource();
String[] theKeys = new String[keys.size()];
for (int i=0; i listKey = new ArrayList();
try {
listKey.addAll(jedis.keys(region+":*"));
int nKeyPreLen = region.length() + 3;
for (int i=0; i