Ankhers
Hey folks,
I’ve been contributing to Hologram and building applications with it lately. It just hit a big milestone: v0.9 was recently released and includes real-time features (release post here if you want to read more). This release has unblocked me from building real applications with it. So, to learn the framework better, I put together a small project to test out how Hologram holds up in a real, albeit very small, project. The result is Holodeck.
It currently includes three applications:
- Chat - Pick a name, create/join rooms, and chat. Messages are persisted and broadcast to everyone in the room over a Hologram subscription. Joining a room pulls the full room history.
- Dashboard - A live look at the running BEAM: per-core CPU, memory breakdown, scheduler/uptime info, and the top processes (sortable by memory, reductions, or pid). It also streams the app’s logs into the page live.
- Polls - Create a simple poll, vote, and watch the results update live. The results page also demos Hologram’s JS interop by working directly with Chart.js.
Keep in mind that I left a few things out on purpose, since I wanted to focus on Hologram and on keeping the app easy to pick up and use. So there’s no authentication in chat, a fixed number of answers in polls, and so on.
Live demo: https://holodeck-divine-dream-8428.fly.dev
Source: ~ankhers/holodeck - A showcase of different hologram applications - sourcehut git
Feedback is welcome! If you know a better way to accomplish something, please let me know. And if there’s another part of Hologram you’d like to see demoed, say the word and I’ll see about building it. Contributions are welcome too.
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jam
Cool! For some reason, on mobile the buttons don’t seem to work. For example I wasn’t able to create a chat room.
The source hut link has a typo. I found the repo here ~ankhers/holodeck - A showcase of different hologram applications - sourcehut git but can’t seem to find the hologram specific code.
FlyingNoodle
The poll demo is broken. I enter a name, 4 options, click “Create” and nothing happens.
nxy7
Chat is also broken, swallows some messages for some reason (I think they’re visible after refresh though)
Ankhers
I should have mentioned it in the original post, but I had the same issue on mobile. I haven’t been able to fully figure out why yet. When it, it was crashing on saving the username actually which is used for room creation. I believe it was claiming that
crypto.randomUUIDwas not a function. Still need to dig a bit deeper on that one.Ankhers
Sorry about that, I had a todo to forward to the poll page after the poll was created but clearly forgot to do it. I am deploying a fix for that now.
Ankhers
https://git.sr.ht/~ankhers/holodeck/tree/main/item/lib/holodeck_web/pages is where you can find most of the hologram specific code. There is some code in
lib/holodeck/that callsHologram.Realtimein order to broadcast to the different pages/components.Ankhers
Unfortunately I have not seen this happen, but thanks for letting me know. I will see if I can replicate and get it fixed. When you saw this, did you see it from different browsers / tabs? Or is this something that you were seeing from just a single tab and not seeing the message from the client that sent it?
Dmk
Most things are broken?
Ankhers
Are you on mobile? Because that is unfortunately known at the moment that some things weren’t working there.
I just ran through everything about 30m ago and it was all working for me. If you are able to be more specific about what is broken and in what environment, it would be appreciated so that I am able to fix it.
nxy7
I was typing and sometimes my own messages didn’t show up until I’ve refreshed.
Polling tab was also throwing some errors in the console.