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@rbxts-trail/core

v0.1.1

Published

Event-based diagnostic information inspired from tokio-rs's tracing

Downloads

150

Readme

[!CAUTION] This project is in experimental phase. We advise you to not use this in your production projects. Bugs and unexpecteds output with these modules will occur at any time.

If you wish to do so, PLEASE USE IT AT YOUR OWN RISK!

Usage

roblox-ts

import { Event, Level, Span, Subscriber, fields, info } from "@rbxts-trail/core";
import { Layer, LayerContext, Layers } from "@rbxts-trail/subscriber";
import { LookupSpan, Registry, SpanData } from "@rbxts-trail/subscriber";

type RegistrySubscriber = Subscriber & LookupSpan<SpanData>;

class FmtLayer extends Layer<RegistrySubscriber> {
    public onEvent(event: Event, ctx: LayerContext<RegistrySubscriber>): void {
        const timestamp = DateTime.now()
            .FormatLocalTime("YYYY-MM-DDTHH:MM:SSZ", "en-us");

        event.metadata.fields.push("timestamp");
        event.fields.push(timestamp);

        const levelStr = Level[event.metadata.level].lower();
        print(`[${timestamp}] [${levelStr}] ${event.fields[0]}`);
    }
}

const subscriber = new Layers(new Registry())
    .withLayer(new FmtLayer());

Subscriber.setGlobalDefault(subscriber);

const numberOfYaks = 3;
info("preparing to shave yaks", fields({ numberOfYaks: numberOfYaks }));

const numberShaved = yakShave.shaveAll(numberOfYaks);
info("yak shaving completed", fields({
    allYaksShaved: numberOfYaks === numberShaved,
}));

Soon...

import { Service, OnStart } from "@flamework/core";
import { Players } from "@rbxts/services";
import { Span, info, fields } from "@rbxts-trail/core";
import { Instrument } from "@rbxts-trail/decorators";

@Service({})
export class TestService implements OnStart {
    @Instrument({
        name = "onPlayerAdded",
        target = "src::services::TestService"
    })
    private onPlayerAdded(player: Player) {
        const span = Span.current();
        span.record("player.DisplayName", player.DisplayName);
        span.record("player.Name", player.Name);
        span.record("player.UserId", player.UserId);

        info("{} ({}) joined the game", player.Name, player.UserId, fields({
            "player.AccountAge": player.UserId,
        }));
    }

    public onStart() {
        Players.PlayerAdded.Connect((player) => {
            task.spawn(() => this.onPlayerAdded(player));
        });
    }
}

Luau

local FmtLayer = setmetatable({}, TrailSubscriber.Layer)
FmtLayer.__index = FmtLayer

function FmtLayer.new()
    return setmetatable({
        _name = "FmtLayer",
    }, FmtLayer)
end

function FmtLayer:onEvent(event, ctx)
    local timestamp = DateTime.now():FormatLocalTime("YYYY-MM-DDTHH:MM:SSZ", "en-us")
    table.insert(event.metadata.fields, "timestamp")
    table.insert(event.fields, timestamp)

    local levelStr = Trail.Level[event.metadata.level]:lower()
    print(`[{timestamp}] [{levelStr}] {event.fields[1]}`)
end

local subscriber = Layers.new(Registry.new())
    :withLayer(FmtLayer.new())

Subscriber.setGlobalDefault(subscriber)

local numberOfYaks = 3
info("preparing to shave yaks", fields { numberOfYaks = numberOfYaks })

local numberShaved = yakShave.shaveAll(numberOfYaks)
info("yak shaving completed", fields {
    allYaksShaved = numberOfYaks == numberShaved,
})

local function span(number: number)
    info("hi!")
end
span = instrument(span, {
    name = "span_test",
    target = "script",
    fields = function(span, number: number)
        span:record("number", number)
    end,
})

span(123)