2019-07-31 JUL

TogetherJS by Mozilla

A free, open-source JS library and service by Mozilla that adds collaboration features and tools to your website. By adding TogetherJS to your site, your users can help each other out on a website in real time!

https://togetherjs.com

Use cases:

Tech support / Instruction
Collaboration

How it works:

Developer pastes two lines of HTML/JS code to webpage to be accessed.

2. User accesses the web URL, clicks "Start TogetherJS" to start a new session, copies session link to share with collaborators. Testing on Richard's web app: https://web4bio.github.io/webgen/richard/richard.html

TogetherJS mediates sessions via remote "Session Hub" servers

https://togetherjs.com/docs/#technology-overview

According to the Console tab in the Web Inspector (command+option+I), TogetherJS sends your mouse movements and form to a session hub (hosted by Mozilla). For instance,

Connecting to – "https://hub.togetherjs.com/hub/C5sMlh7a3K" – "https://web4bio.github.io/webgen/richard/richard.html"

send — togetherjsPackage.js:1874

From Web Inspector > Console:

Default Session Hub for TogetherJS – hosted in Heroku?

Hosting our own Session Hub Server for TogetherJS

To address sensitive data concerns, we have the option of deploying our own hub service on a PaaS platform approved for hosting sensitive data.

https://togetherjs.com/docs/#hosting-the-hub-server

Azure - CosmosDB

We've already explored

Function Apps - JS, C#, Java, F# - https://docs.microsoft.com/en-us/azure/azure-functions/supported-languages
App Services - .Net, Java (SE, Tomcat, Wildfly), Node, Python, Ruby

CosmosDB - document-based NoSQL database with multiple-language query APIs

https://docs.microsoft.com/en-us/azure/cosmos-db/create-cosmosdb-resources-portal

Discussion re: the "API" option - it's the language you can use to query your database. According to Joe, the data is stored as a NoSQL "document" container on the backend regardless of the API chosen.

Deployment options:

Deploy example app locally (a To-Do list):

CosmosDB Resrouce > "Quick start" blade > Select Node.js > Download Node.js app and deploy locally.
- In Terminal, navigate to the web app folder. Then, execute:
- npm install
- npm start
- Go to (localhost:3000) in your local browser, and add some To-Do items.
Add some items to the To-Do List interface.
Test SQL query in the data explorer.
- Lesson learned: always reference the table itself. The following are interchangeable:
  - SELECT * FROM Items where LOWER(Items.category) = "for dawn";
  - SELECT * FROM c where LOWER(c.category) = "for dawn";

CosmosDB Hierarchy of entities:

Database Account > Database >Containers > Item(s)

From https://docs.microsoft.com/en-us/azure/cosmos-db/databases-containers-items:

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