gabrieljoelc

Applied distributed system communication stuff

Scenario

Frontend API (FA):

1. User adds wallet
2. User KYC verifies
3. User changes wallet
4. User changes wallet

gabrieljoelc

These notes are based the excellent A Complete Guid to useEffect.

Quote:

Does count somehow “watch” changes to our state and update automatically? That might be a useful first intuition when you learn React but it’s not an accurate mental model.

In this example, count is just a number. It’s not a magic “data binding”, a “watcher”, a “proxy”, or anything else. It’s a good old number

gabrieljoelc

GistID: eedf956842966c41d47322f5b9e2a121

// Pre-request Postman script for sending Azure Service Bus REST requests using a SAS key

// https://docs.microsoft.com/en-us/rest/api/eventhub/Generate-SAS-token?redirectedfrom=MSDN#nodejs
// also https://gist.github.com/DinoChiesa/75796b27828cf8e15c91

const sasKey = postman.getEnvironmentVariable("SASKey"); 
const sasKeyName = postman.getEnvironmentVariable("SASKeyName");
const sbSubDomain = postman.getEnvironmentVariable("REST_SUBDOMAIN");

gabrieljoelc

# requires values with whitespace to be surrounded with double quotes
env -S "`cat .env`" dotnet run

gabrieljoelc

GistID: 4060cc90d31c57d8d77c8b011e2420af

1. Developer makes change to tf config
1. Commits to pr branch
1. PR branch build runs tf _plan_
1. Manual pr "check" for devops to review plan in CI
1. Devops person approves
1. PR is merged into develop/master
1. develop/master build pipeline runs _apply_ after tests pass

gabrieljoelc

# assuming .env file is in working directory and looks like (must have no whitspace expect for newlines or within quotes)
# REACT_APP_API_URL=https://myapi.io
# REACT_APP_AUTH_TOKEN=123
# see https://stackoverflow.com/a/4229346/34315
for line in `cat .env`; do echo "$line"; done

gabrieljoelc

• Data distribution vs. pub/sub

  • Data distribution is physical architecture
  • Pub/sub is more focused on logical architecture

• Udi's "service" is a logical entity vs. component physical entity (a piece of code running in one or more hosts)

• Preferred interaction

• Avoid crossing network boundaries within service boundaries

• Service - technical authority for a business capability

• Data distribution from a database to a frontend is likely within the same logical service boundary

• For pub/sub communicating between differing business capabilities usually doesn't care about low latency

gabrieljoelc

GistID: f6f0f97692f2dee4590c0403865b29cb

Dapr on Azure

Serverless

I want to replace Azure Functions with custom auto-scaling / consumption utilization using Dapr. I'm going to use this sample to get started.

Pre-requisite steps:

gabrieljoelc

GistID: cba6f001e9a8e35b9a816eab86debfa1

# Requirements

- Foldable
- Upright
- Under $200

# Nice-to-have

gabrieljoelc

GistID: 50e840d8d00d5ad8eec20a9104649cca

Stuffing (TBD)

• https://www.epicurious.com/recipes/food/views/italian-sausage-and-bread-stuffing-240559

Squash Risotto (Gabe)

• https://www.seriouseats.com/recipes/2014/09/pressure-cooker-butternut-squash-risotto-sage-brown-butter-quick-easy-recipe.html