apminsight/lib/metrics/error.js

monitor nodejs applications

var constants = require("./../constants");
var utils = require("./../util/utils");

function ErrorInfo(error) {
    this._time = new Date().getTime();
    this._error = error;
    this._stackFrames = null;
}

ErrorInfo.prototype.getTime = function () {
    return this._time;
};

ErrorInfo.prototype.getType = function () {
    if (this._errorType) {
        return this._errorType;
    }
    var defaultErrType = "Error";
    var errorCode = this._error.code;
    if (
        !utils.isEmpty(this._error.name) &&
        this._error.name !== defaultErrType
    ) {
        this._errorType = this._error.name;
    } else if (!utils.isEmpty(errorCode)) {
        this._errorType =
            typeof errorCode === "string" ? errorCode : errorCode.toString();
    } else {
        this._errorType = defaultErrType;
    }
    return this._errorType;
};

ErrorInfo.prototype.getLevel = function () {
    return "FATAL";
};

ErrorInfo.prototype.getMessage = function () {
    return this._error.message;
};

ErrorInfo.prototype.getErrorStackFrames = function () {
    if (this._stackFrames) {
        return this._stackFrames;
    }
    var filtered = this._error.stack.split("\n").filter(function (line) {
        return line.match(constants.stackTraceRegex);
    });

    this._stackFrames = filtered.map(function (line) {
        var tokens = line.replace(/^\s+/, "").split(/\s+/).slice(1);
        var locationParts = extractLocation(tokens.pop());
        var functionName = tokens.join(" ") || "";
        var fileName = locationParts[0] ? locationParts[0] : "";
        return ["", functionName, fileName, locationParts[1]];
    });
    return this._stackFrames;
};

function extractLocation(urlLike) {
    if (urlLike.indexOf(":") === -1) {
        return [urlLike];
    }
    var regExp = /(.+?)(?:(\d+))?(?::(\d+))?$/;
    var parts = regExp.exec(urlLike.replace(/[()]/g, ""));
    return [parts[1], parts[2] || "", parts[3] || ""];
}

module.exports = ErrorInfo;