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package com.aliyuncs.v5.utils;

import io.opentracing.Span;
import io.opentracing.tag.Tags;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;

public class TraceUtils {

    public static void onError(Throwable throwable, Span span) {
        Tags.ERROR.set(span, Boolean.TRUE);
        if (throwable != null) {
            span.log(errorLogs(throwable));
        }
    }

    private static Map errorLogs(Throwable throwable) {
        Map errorLogs = new HashMap(10);
        errorLogs.put("event", Tags.ERROR.getKey());
        errorLogs.put("error.object", throwable);
        errorLogs.put("error.kind", throwable.getClass().getName());
        String message = throwable.getCause() != null ? throwable.getCause().getMessage() : throwable.getMessage();
        if (message != null) {
            errorLogs.put("message", message);
        }
        StringWriter sw = new StringWriter();
        throwable.printStackTrace(new PrintWriter(sw));
        errorLogs.put("stack", sw.toString());
        return errorLogs;
    }

}