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package com.bizmda.log.trace;

import org.slf4j.MDC;

import java.util.Map;
import java.util.UUID;

/**
 * 日志追踪工具类
 *
 * @author zlt
 * Blog: https://zlt2000.gitee.io
 * Github: https://github.com/zlt2000
 */
public class MDCTraceUtils {
    /**
     * 追踪id的名称
     */
    public static final String KEY_TRACE_ID = "traceId";

    public static final String ISTIO_X_B3_TRACEID = "x-b3-traceid";
    public static final String ISTIO_TRACE_HEADERS[] = {
            "x-request-id",
            "x-b3-parentspanid",
            "x-b3-sampled",
            "x-b3-spanid",
            "x-b3-traceid",
            "x-b3-flags",
            "x-ot-span-context"
    };
//    /**
//     * 日志链路追踪id日志标志
//     */
//    public static final String LOG_TRACE_ID = "traceId";
    /**
     * 日志链路追踪id信息头
     */
    public static final String TRACE_ID_HEADER = "x-traceId-header";

    /**
     * filter的优先级，值越低越优先
     */
    public static final int FILTER_ORDER = -1;

    /**
     * 创建traceId并赋值MDC
     */
    public static void addTraceId() {
        MDC.put(KEY_TRACE_ID, createTraceId());
    }

    public static void putTraceId(String traceId) {
        MDC.put(KEY_TRACE_ID, traceId);
    }

    /**
     * 获取MDC中的traceId值
     * @return traceId
     */
    public static String getTraceId() {
        return MDC.get(KEY_TRACE_ID);
    }

    /**
     * 清除MDC的值
     */
    public static void removeTraceId() {
        MDC.remove(KEY_TRACE_ID);
    }

    /**
     * 创建traceId
     * @return traceId
     */
    public static String createTraceId() {
        return UUID.randomUUID().toString().replace("-", "").toUpperCase();
    }
}