Redis 在springBoot中的一个使用示例
2024-09-04 17:24:36
在现系统中使用了一个字典表,更新或插入字典表需要做Redis缓存
@Override
@Cache(name = Constants.REDIS_PREFIX_DIC, desc = "变更字典后更新")
public int editDict(DictEntity data) {
int editCnt = -1;
Date d = new Date();
Integer dictId = data.getDictId();
data.setUpdatedDate(d);
if (dictId != null && dictId > 0) {
editCnt = dictDao.updatedByPrimaryKeySelective(data);
} else {
data.setCreatedDate(d);
data.setCreatedBy(data.getUpdatedBy());
editCnt = dictDao.insertSelective(data);
dictId = data.getDictId();
} dictItemsDao.deleteByDictId(dictId); List<DictItemsEntity> list = new ArrayList<DictItemsEntity>();
for (DictItemsEntity item : data.getItemsList()) {
item.setDictId(dictId);
list.add(item);
}
dictItemsDao.insertByList(list);
return editCnt;
}
在此之上使用了一个@Catch的注解,这个注解是自己重写的,做Redis缓存的更新操作
@Catch注解:
package com.jn.baseservice.annotation; import com.jn.baseservice.common.RedisConstant; import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target; @Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD})
public @interface Cache { /**
* 缓存名
*
* @return
*/
String name(); /**
* 更新范围
*
* @return
*/
String range() default RedisConstant.RANGE_WHOLE; /**
* 描述
*
* @return
*/
String desc() default "";
}
其中以下两个注解可以去:https://www.cnblogs.com/peida/archive/2013/04/24/3036689.html 中查看
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD})
之后使用一个切面,用于监听Redis更改缓存的操作:
package com.jn.ssr.superrescue.config; import com.jn.baseservice.annotation.Cache;
import com.jn.baseservice.common.RedisConstant;
import com.jn.ssr.superrescue.cache.CacheFactory;
import com.jn.ssr.superrescue.cache.DictCache;
import com.jn.ssr.superrescue.tools.SpringConfigTool; import lombok.extern.log4j.Log4j2; import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;
import org.springframework.util.StopWatch; @Aspect
@Component
@Log4j2
/**
* 用于监听更改缓存的操作
*/
public class CacheAspect {
//切面范围:com.hhh.test.super下的service.impl 下所有的public开头的方法
@Pointcut("execution(public * com.hhh.test.super.*.*.service.impl..*.*(..))")
public void cacheCut() {
}
//这个就是以上Redis的Catch的实现
@AfterReturning(returning = "ret", pointcut = "cacheCut()", value = "@annotation(cache)")
public void doAfterReturning(Object ret, Cache cache) throws Throwable {
log.info("欢迎更改缓存:{}", ret);
StopWatch watch = new StopWatch();
watch.start(cache.name());
CacheFactory factory = (CacheFactory) SpringConfigTool.getBean(DictCache.factoryMap.get(cache.name()));
boolean result = cache.range().equals(RedisConstant.RANGE_WHOLE) ? factory.create().wholeRefresh() : factory.create().simpleRefresh(cache.name());
watch.stop();
log.info("缓存更新结果 {} taskName:{},耗时:{}ms,描述:{}", result, watch.getLastTaskName(), watch.getLastTaskTimeMillis(), cache.desc());
}
}
调用了catchFactory:其中有一个create方法,返回一个CatcherUpdate对象:
package com.jn.ssr.superrescue.cache; public interface CacheFactory {
CacheUpdate create();
}
CatchUpdate中提供两个方法:
package com.jn.ssr.superrescue.cache; public interface CacheUpdate { /**
* vue调用组件
*/
String key = "key"; String label = "label"; String id = "id"; String parentId = "parentId"; default boolean simpleRefresh(String name) {
return true;
} boolean wholeRefresh();
}
这个类的实现类是:
package com.jn.ssr.superrescue.cache.impl; import com.jn.baseservice.common.Constants;
import com.jn.baseservice.common.RedisConstant;
import com.jn.baseservice.entity.dict.DictEntity;
import com.jn.baseservice.entity.dict.DictItemsEntity;
import com.jn.baseservice.utils.DateUtils;
import com.jn.baseservice.utils.RedisHandle;
import com.jn.ssr.superrescue.cache.CacheUpdate;
import connector.dict.DictService;
import lombok.extern.log4j.Log4j2;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component; import java.util.*;
import java.util.concurrent.ConcurrentHashMap; /**
* 字典类缓存
*
*/
@Component
@Log4j2
public class DicCache implements CacheUpdate { @Autowired
private RedisHandle redisHandle; @Autowired
private DictService dictService; @Override
public boolean simpleRefresh(String dicCode) {
boolean result = true;
try {
DictEntity search = new DictEntity();
search.setDictCode(dicCode);
commonAdd(search);
} catch (Exception e) {
result = false;
log.error("字典部分更新失败:", e);
}
return result;
} @Override
public boolean wholeRefresh() {
boolean result = true;
try {
commonAdd(new DictEntity());
} catch (Exception e) {
result = false;
log.error("字典全量更新失败:", e);
}
return result;
} /**
* 抽离公共部分
*
* @param search
*/
private void commonAdd(DictEntity search) {
search = new DictEntity();//需要全量更新 到REDIS_PREFIX_WEB_DIC
log.info("添加基础数据字典");
long start = System.currentTimeMillis();
List<DictEntity> list = dictService.findBatchItems(search);
Map<String, List<Map<String, String>>> dictMaps = new ConcurrentHashMap<>();
for (DictEntity tmp : list) {
String code = tmp.getDictCode();
if (tmp.getCompanyId() != null && tmp.getCompanyId() > 0) {
code += "_" + tmp.getCompanyId();
}
List<Map<String, String>> dictItems = new ArrayList<Map<String, String>>();
List<DictItemsEntity> itemsList = tmp.getItemsList();
Map<String, String> itemsMap = new LinkedHashMap<String, String>();
for (DictItemsEntity item : itemsList) {
Map<String, String> webMap = new LinkedHashMap<String, String>();
webMap.put("key", item.getDictKey());
webMap.put("label", item.getDictValue());
webMap.put("id", item.getDictItemId().toString());
webMap.put("parentId", item.getDictItemId().toString());
dictItems.add(webMap);
itemsMap.put(item.getDictKey(), item.getDictValue());
}
redisHandle.set(Constants.REDIS_PREFIX_DIC + code, itemsMap);
redisHandle.set(Constants.REDIS_PREFIX_WEB_DIC + code, dictItems);
dictMaps.put(code, dictItems);
}
redisHandle.set(Constants.REDIS_PREFIX_WEB_DIC, dictMaps);
Date d = new Date();
//更新本号
String version = DateUtils.formatDate(d, "yyyyMMddHHmmss");
redisHandle.hset(RedisConstant.DIC_CACHE_VERSION_TABLE, RedisConstant.DIC_DICT_VERSION, version);
log.info("更新数据字典版本为:{}", version);
log.info("添加基础数据字典 结束 共计{}秒", (System.currentTimeMillis() - start) / 1000.0);
}
}
sy_dict与sp_dict——items表:
CREATE TABLE `sy_dict` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主码',
`dict_code` varchar(32) NOT NULL DEFAULT '' COMMENT '标识',
`company_id` int(11) DEFAULT '0' COMMENT '归属公司(0公用)',
`is_disabled` tinyint(4) DEFAULT '1' COMMENT '是否可删除编辑 0 不可删除编辑,1可删除编辑',
`description` varchar(100) DEFAULT '' COMMENT '字典描述',
`created_date` datetime DEFAULT NULL COMMENT '创建时间',
`created_by` int(11) DEFAULT NULL COMMENT '创建者',
`updated_date` datetime DEFAULT NULL COMMENT '更新人',
`updated_by` int(11) DEFAULT NULL COMMENT '更改人',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=213 DEFAULT CHARSET=utf8 COMMENT='数据字典表'; CREATE TABLE `sy_dict_items` (
`dict_item_id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主码',
`dict_id` int(11) NOT NULL COMMENT '字典id',
`dict_key` varchar(32) DEFAULT '' COMMENT '键',
`dict_value` varchar(100) DEFAULT '' COMMENT '值',
`priority` int(11) DEFAULT '0' COMMENT '优先级',
`parent_id` int(11) DEFAULT NULL COMMENT '父子项目id',
PRIMARY KEY (`dict_item_id`),
KEY `fk_dictitem_dictid` (`dict_id`),
CONSTRAINT `sy_dict_items_ibfk_1` FOREIGN KEY (`dict_id`) REFERENCES `sy_dict` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=1509 DEFAULT CHARSET=utf8 COMMENT='数据字典表';
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