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keksAccountGUI/node_modulesOLD/chrome-trace-event/dist/trace-event.js

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2019-08-11 18:48:02 +00:00
"use strict";
/**
* trace-event - A library to create a trace of your node app per
* Google's Trace Event format:
* // JSSTYLED
* https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU
*/
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var stream_1 = require("stream");
function evCommon() {
var hrtime = process.hrtime(); // [seconds, nanoseconds]
var ts = hrtime[0] * 1000000 + Math.round(hrtime[1] / 1000); // microseconds
return {
ts: ts,
pid: process.pid,
tid: process.pid // no meaningful tid for node.js
};
}
var Tracer = /** @class */ (function (_super) {
tslib_1.__extends(Tracer, _super);
function Tracer(opts) {
if (opts === void 0) { opts = {}; }
var _this = _super.call(this) || this;
_this.noStream = false;
_this.events = [];
if (typeof opts !== "object") {
throw new Error("Invalid options passed (must be an object)");
}
if (opts.parent != null && typeof opts.parent !== "object") {
throw new Error("Invalid option (parent) passed (must be an object)");
}
if (opts.fields != null && typeof opts.fields !== "object") {
throw new Error("Invalid option (fields) passed (must be an object)");
}
if (opts.objectMode != null &&
(opts.objectMode !== true && opts.objectMode !== false)) {
throw new Error("Invalid option (objectsMode) passed (must be a boolean)");
}
_this.noStream = opts.noStream || false;
_this.parent = opts.parent;
if (_this.parent) {
_this.fields = Object.assign({}, opts.parent && opts.parent.fields);
}
else {
_this.fields = {};
}
if (opts.fields) {
Object.assign(_this.fields, opts.fields);
}
if (!_this.fields.cat) {
// trace-viewer *requires* `cat`, so let's have a fallback.
_this.fields.cat = "default";
}
else if (Array.isArray(_this.fields.cat)) {
_this.fields.cat = _this.fields.cat.join(",");
}
if (!_this.fields.args) {
// trace-viewer *requires* `args`, so let's have a fallback.
_this.fields.args = {};
}
if (_this.parent) {
// TODO: Not calling Readable ctor here. Does that cause probs?
// Probably if trying to pipe from the child.
// Might want a serpate TracerChild class for these guys.
_this._push = _this.parent._push.bind(_this.parent);
}
else {
_this._objectMode = Boolean(opts.objectMode);
var streamOpts = { objectMode: _this._objectMode };
if (_this._objectMode) {
_this._push = _this.push;
}
else {
_this._push = _this._pushString;
streamOpts.encoding = "utf8";
}
stream_1.Readable.call(_this, streamOpts);
}
return _this;
}
/**
* If in no streamMode in order to flush out the trace
* you need to call flush.
*/
Tracer.prototype.flush = function () {
if (this.noStream === true) {
for (var _i = 0, _a = this.events; _i < _a.length; _i++) {
var evt = _a[_i];
this._push(evt);
}
this._flush();
}
};
Tracer.prototype._read = function (_) { };
Tracer.prototype._pushString = function (ev) {
var separator = "";
if (!this.firstPush) {
this.push("[");
this.firstPush = true;
}
else {
separator = ",\n";
}
this.push(separator + JSON.stringify(ev), "utf8");
};
Tracer.prototype._flush = function () {
if (!this._objectMode) {
this.push("]");
}
};
Tracer.prototype.child = function (fields) {
return new Tracer({
parent: this,
fields: fields
});
};
Tracer.prototype.begin = function (fields) {
return this.mkEventFunc("b")(fields);
};
Tracer.prototype.end = function (fields) {
return this.mkEventFunc("e")(fields);
};
Tracer.prototype.completeEvent = function (fields) {
return this.mkEventFunc("X")(fields);
};
Tracer.prototype.instantEvent = function (fields) {
return this.mkEventFunc("I")(fields);
};
Tracer.prototype.mkEventFunc = function (ph) {
var _this = this;
return function (fields) {
var ev = evCommon();
// Assign the event phase.
ev.ph = ph;
if (fields) {
if (typeof fields === "string") {
ev.name = fields;
}
else {
for (var _i = 0, _a = Object.keys(fields); _i < _a.length; _i++) {
var k = _a[_i];
if (k === "cat") {
ev.cat = fields.cat.join(",");
}
else {
ev[k] = fields[k];
}
}
}
}
if (!_this.noStream) {
_this._push(ev);
}
else {
_this.events.push(ev);
}
};
};
return Tracer;
}(stream_1.Readable));
exports.Tracer = Tracer;
/*
* These correspond to the "Async events" in the Trace Events doc.
*
* Required fields:
* - name
* - id
*
* Optional fields:
* - cat (array)
* - args (object)
* - TODO: stack fields, other optional fields?
*
* Dev Note: We don't explicitly assert that correct fields are
* used for speed (premature optimization alert!).
*/
//# sourceMappingURL=trace-event.js.map