package com.ishop.merchant.cache;

import com.ishop.merchant.Constants;
import com.ishop.merchant.MerchantCache;
import com.ishop.merchant.service.MerchantServiceImpl;
import com.ishop.model.po.EbMerchant;
import com.walker.cache.Cache;
import com.walker.infrastructure.utils.StringUtils;
import com.walker.support.redis.cache.RedisCacheProvider;

import java.util.List;

public class RedisMerchantCache extends RedisCacheProvider<EbMerchant> implements MerchantCache {

    public RedisMerchantCache(){
        this.setUseRedis(true);
        this.setLoadPage(false);
    }

    @Override
    protected int loadDataToCache(Cache cache) {
        List<EbMerchant> hosts = this.merchantService.selectAll(new EbMerchant());
        if(!StringUtils.isEmptyList(hosts)){
            // ------------------------- 切换成普通缓存步骤：3
            if(this.isUseRedis()){
                // 如果redis中缓存数量和数据库中不一致（少），则清空redis缓存，重新加载数据库数据到缓存中。
                long totalCache = cache.getPersistentSize();
                if(totalCache != hosts.size()){
                    logger.info("redis缓存中用户数量小于实际用户，需要清空缓存重新加载! cache = " + totalCache + ", db = " + hosts.size());
                    cache.clear();

                    for(EbMerchant h : hosts){
                        cache.put(String.valueOf(h.getId()), h);
                    }
                }
            }//------------------------------------------
            return hosts.size();
        }
        return 0;
    }

    @Override
    public EbMerchant get(int id) {
        return this.getCacheData(String.valueOf(id));
    }

    @Override
    public void save(EbMerchant category) {
        this.putCacheData(String.valueOf(category.getId()), category);
    }

    @Override
    public void update(EbMerchant category) {
        this.updateCacheData(String.valueOf(category.getId()), category);
    }

    @Override
    public void remove(int id) {
        this.removeCacheData(String.valueOf(id));
    }

    @Override
    public String getProviderName() {
        return Constants.CACHE_NAME_MERCHANT;
    }

    @Override
    public Class<?> getProviderType() {
        return EbMerchant.class;
    }

    public void setMerchantService(MerchantServiceImpl merchantService) {
        this.merchantService = merchantService;
    }

    private MerchantServiceImpl merchantService;
}