lightstep-tracer/lib/imp/log_builder.js

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"use strict";

var _platform_abstraction_layer = require("../platform_abstraction_layer");

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }

var constants = require('../constants');

var coerce = require('./coerce'); // Facade on the thrift log data structure to make constructing log records more
// convenient.


var LogBuilder = /*#__PURE__*/function () {
  function LogBuilder(runtime) {
    _classCallCheck(this, LogBuilder);

    this._runtime = runtime; // eslint-disable-next-line camelcase

    this._record = new _platform_abstraction_layer.crouton_thrift.LogRecord({
      timestamp_micros: runtime._platform.nowMicros(),
      runtime_guid: null,
      span_guid: null,
      stable_name: null,
      message: null,
      level: null,
      thread_id: null,
      filename: null,
      line_number: null,
      stack_frames: null,
      payload_json: null,
      error_flag: null
    });
  }

  _createClass(LogBuilder, [{
    key: "record",
    value: function record() {
      return this._record;
    }
  }, {
    key: "end",
    value: function end() {
      this._runtime._addLogRecord(this._record);
    }
  }, {
    key: "timestamp",
    value: function timestamp(micros) {
      this._record.timestamp_micros = coerce.toNumber(micros);
      return this;
    }
  }, {
    key: "message",
    value: function message(msg) {
      this._record.message = coerce.toString(msg);
      return this;
    }
  }, {
    key: "level",
    value: function level(num) {
      this._record.level = constants.LOG_LEVEL_TO_STRING[num] || null;

      if (num >= constants.LOG_ERROR) {
        this.error(true);
      }

      return this;
    }
  }, {
    key: "span",
    value: function span(guid) {
      if (guid !== undefined) {
        this._record.span_guid = coerce.toString(guid);
      }

      return this;
    }
  }, {
    key: "name",
    value: function name(stableName) {
      this._record.stable_name = coerce.toString(stableName);
      return this;
    }
  }, {
    key: "error",
    value: function error(flag) {
      this._record.error_flag = coerce.toBoolean(flag);
      return this;
    }
  }, {
    key: "payload",
    value: function payload(data) {
      if (data !== undefined) {
        this._record.payload_json = this._encodePayload(data);
      }

      return this;
    }
  }, {
    key: "_encodePayload",
    value: function _encodePayload(data) {
      var payloadJSON = null;

      try {
        payloadJSON = JSON.stringify(data);
      } catch (_ignored) {
        // TODO: this should log an internal warning that a payload could
        // not be encoded as JSON.
        return undefined;
      }

      return payloadJSON;
    }
  }]);

  return LogBuilder;
}();

module.exports = LogBuilder;

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