package com.chinaztt.mes.quality.excel;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.fastjson.JSON;
import com.chinaztt.mes.quality.service.TestStandardService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

/**
 * @Auther: shihongzhi
 * @Date: 2021/12/22/17:52
 * @Description:
 */
@Slf4j
public class TestStandardUploadListener extends AnalysisEventListener<TestStandardData> {

	/**
	 * 每隔5条存储数据库，实际使用中可以100条，然后清理list ，方便内存回收
	 */
	private static final int BATCH_COUNT = 10000;

	/**
	 * 缓存的数据
	 */
	private List<TestStandardData> cachedDataList = new LinkedList<>();

	private TestStandardService testStandardService;

	public TestStandardUploadListener(TestStandardService testStandardService) {
		this.testStandardService = testStandardService;
	}

	@Override
	public void invoke(TestStandardData testStandardData, AnalysisContext analysisContext) {
		log.info("解析到一条数据:{}", JSON.toJSONString(testStandardData));
		cachedDataList.add(testStandardData);
		// 达到BATCH_COUNT了，需要去存储一次数据库，防止数据几万条数据在内存，容易OOM
		if (cachedDataList.size() >= BATCH_COUNT) {
			saveData();
			// 存储完成清理 list
			cachedDataList.clear();
		}
	}

	@Override
	public void doAfterAllAnalysed(AnalysisContext analysisContext) {
		// 这里也要保存数据，确保最后遗留的数据也存储到数据库
		saveData();
		log.info("所有数据解析完成！");
	}

	/**
	 * 加上存储数据库
	 */
	private void saveData() {
		log.info("{}条数据，开始存储数据库！", cachedDataList.size());
		testStandardService.importExcel(cachedDataList);
		log.info("存储数据库成功！");
	}
}