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package com.xwc1125.common.config.datasource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * Description: 数据源切换处理
 * 
 *
 * @Author: xwc1125
 * @Date: 2019-03-23 19:08:20
 * @Copyright Copyright@2019
 */
public class DynamicDataSourceContextHolder {

    private static Logger log = LoggerFactory.getLogger(DynamicDataSourceContextHolder.class);
    /**
     * 使用ThreadLocal维护变量，ThreadLocal为每个使用该变量的线程提供独立的变量副本，
     * 所以每一个线程都可以独立地改变自己的副本，而不会影响其它线程所对应的副本。
     */
    private static final ThreadLocal CONTEXT_HOLDER = new ThreadLocal<>();

    /**
     * 设置数据源的变量
     */
    public static void setDateSourceType(String dsType) {
        log.info("切换到{}数据源", dsType);
        CONTEXT_HOLDER.set(dsType);
    }

    /**
     * 获得数据源的变量
     */
    public static String getDateSourceType() {
        return CONTEXT_HOLDER.get();
    }

    /**
     * 清空数据源变量
     */
    public static void clearDateSourceType() {
        CONTEXT_HOLDER.remove();
    }
}