MchView 2.0

Current mchview

• based on old Root GUI
• visually and technically outdated
• difficult to maintain
• difficult to develop further

Replace with something

• with a better looking UI.
• easier to develop
• easier to maintain
• easier to use from ~anywhere
• with more origins for data sources (e.g. clusters...)

Using web technologies (HTML/CSS/JS)

The mockup

UI elements

UI elements = components

• Each component can be developped independently
• and plugged/reused easily in different views
• defined within a Javascript framework (Mithril or React)

Data access

Clearly separated from UI

Using external APIs as much as possible

Those APIs might be used outside mchview as well

Mapping as a service

Not strictly required to be an API

But using it as a playground for API dev

One advantage (for mchview) is that it loads only what is needed for a view

Mapping API

Entry point gives you a help.

Mapping API example

?dualsampas URLs gives you the shape of dual sampas

In JSON format.

The same, formatted for humans

{
  "DualSampas": [
    {
      "ID": 1025,
      "Vertices": [
        {
          "X": 20,
          "Y": 0
        },
        {
          "X": 20,
          "Y": -20
        },
        {
          "X": 39.999999992,
          "Y": -20
        },
        {
          "X": 39.999999992,
          "Y": 0
        },
        {
          "X": 20,
          "Y": 0
        }
      ],
      "Value": 0
    },
    {
      "ID": 1026,
      "Vertices": [
        {
          "X": 0,
          "Y": 0
        },
        {
          "X": 0,
          "Y": -20
        },
        {
          "X": 19.999999992,
          "Y": -20
        },
        {
          "X": 19.999999992,
          "Y": 0
        },
        {
          "X": 0,
          "Y": 0
        }
      ],
      "Value": 0
    }
  ]
}

CCDB API

That one is the official O2 CCDB one (WP10).

See e.g. this talk by Costin

CCDB JSON API

A lightweight front-end to the CCDB to convert Root (muon) calibration objects to JSON format

The API that might be used by mchview to get calib data

(very alpha software. see serve-ocdb branch of alice-go repo)

Current status

• Not quite as the mockup (yet)
• more a proof-of-concept for the moment
• but seems viable...

Trying it locally

> git clone https://github.com/mrrtf/mchview.git

> echo "MCHVIEW_PORT=4444\nMCH_MAPPING_API=http://mchmapping.aphecetche.me:3333\n
MCH_MAPPING_API_PORT=3333\n" > .env

With Docker

> docker compose up -d mchview

With npm

> npm install && npm start

Open browser at http://localhost:4444

Try it on the web

MchView proto

Code

https://github.com/mrrtf/mchview

Contributions welcome

Questions ?