@apartmentlist/js-trace-logger/dist/esm2015/log_formatter.js

Logger outputs messages with Trace ID

import { tracer } from 'dd-trace';
import { compileTemplate } from './util';
import { LoggerSeverity } from './constant';
export class LogFormatter {
    constructor(option, passed_tracer) {
        const { env, service, version, progname, logTemplate, traceTemplate, dateFunc } = option;
        this.env = env;
        this.service = service;
        this.version = version;
        this.progname = progname;
        this.logFunc = compileTemplate(logTemplate);
        this.traceFunc = compileTemplate(traceTemplate);
        this.dateFunc = dateFunc;
        this.tracer = passed_tracer || tracer;
    }
    format(dt, sev, msg) {
        return this.logFunc({
            datetime: this.dateFunc(dt),
            progname: this.progname,
            severity: LoggerSeverity[sev],
            trace: this.toTraceString(),
            msg: msg,
        });
    }
    toTraceString() {
        const activeSpan = this.tracer.scope().active();
        let trace_id = '1';
        let span_id = '1';
        if (activeSpan) {
            const context = activeSpan.context();
            trace_id = context.toTraceId();
            span_id = context.toSpanId();
        }
        return this.traceFunc({
            env: this.env,
            service: this.service,
            version: this.version,
            trace_id: trace_id,
            span_id: span_id,
        });
    }
}