Demo of guavacache

cache Interface

public interface Cache {

    <T> T get(Object key, Class<T> type);

    boolean has(Object key);

    void put(Object key, Object value);

    void del(Object key);

}

cache factory

public class CacheFactory {

    private static class GuavaCache implements Cache {

        private org.springframework.cache.Cache cache;

        GuavaCache(String cacheName, int expiredMinutes) {
            cache = new ConcurrentMapCache(cacheName,
                    CacheBuilder.newBuilder()
                            .expireAfterWrite(expiredMinutes, TimeUnit.MINUTES)
                            .build().asMap(),
                    false);
        }

        GuavaCache(String cacheName, int expiredTime, TimeUnit timeUnit) {
            cache = new ConcurrentMapCache(cacheName,
                    CacheBuilder.newBuilder()
                            .expireAfterWrite(expiredTime, timeUnit)
                            .build().asMap(),
                    false);
        }

        @Override
        public <T> T get(Object key, Class<T> type) {
            return cache.get(key, type);
        }

        @Override
        public boolean has(Object key) {
            return cache.get(key) != null;
        }

        @Override
        public void put(Object key, Object value) {
            cache.put(key, value);
        }

        @Override
        public void del(Object key) {
            cache.put(key,"");
        }

    }


    static private final String PREFIX = "CACHE_FACTORY_";
    static private int sn = 1;

    synchronized static public Cache getCacheWithExpiredMinutes(int expiredMinutes) {
        String cacheName = PREFIX + sn;
        sn += 1;
        return new GuavaCache(cacheName, expiredMinutes);
    }

    synchronized static public Cache getCacheWithExpiredSeconds(int expiredSeconds) {
        String cacheName = PREFIX + sn;
        sn += 1;
        return new GuavaCache(cacheName, expiredSeconds, TimeUnit.SECONDS);
    }

}

Use

@Service
public class GuangPingDistributionDataHandler {


    private Cache guangpingKeyWordListCache = CacheFactory.getCacheWithExpiredSeconds(10);
    private static final String CACHEKEY = "guangpingCacheKey";


    @Autowired
    private DataToGuangPingAsynProducer dataToGuangPingAsynProducer;

    @Autowired
    private KeywordCommonRelationMapper keywordCommonRelationMapper;


    @Override
    Boolean isHitKeywords(List<String> keyWordList) {
        List<String> giangPingKeyWordListFromCache = guangpingKeyWordListCache.get(CACHEKEY, List.class);
        if (null == giangPingKeyWordListFromCache || giangPingKeyWordListFromCache.size() == 0) {
            /**  If there is no cache  **/
            List<String> giangPingKeyWordListFromDB = keywordCommonRelationMapper.selectKeyListByValue(String.valueOf(SystemSourceEnum.GUANGPING.getCode()));
            giangPingKeyWordListFromCache = giangPingKeyWordListFromDB;
            guangpingKeyWordListCache.put(CACHEKEY, giangPingKeyWordListFromDB);
        }

        for(String keyWord : keyWordList){
            if(giangPingKeyWordListFromCache.contains(keyWord)){
                return true;
            }
        }
        return false;
    }


}