Allow multiple databases on the same port

[josiahruddell]

Case

Enhancement

Issue

Cannot connect multiple databases to the same server/app running the same port through rxdb.

Info

• Environment: Node.js
• Adapter: All
• Stack: Typescript

Code

const db1 = await DB.create({
  name: 'db1',
})

// add some collections to db1

const db2 = await DB.create({
  name: 'db2',
})

// add some collections to db2

Create a server on the nodeJS side...

db1.server({
  path: `/${db1}`,
  port: 3000,
})


db2.server({ // throws port in use
  path: `/${db2}`,
  port: 3000,
})

The feature request is to allow multiple calls to db.server with the same port and different paths.

[josiahruddell]

I was looking through the code and would be happy to put up a PR but want to get the convo going here first.

[pubkey]

Hi @josiahruddell great idea.
I think we should make it possible to pass any express-instance when calling RxDatabase.server(). by this people could also run the rxdb-server and the rest-endpoint on the same port.

To serve two rxdb-databases on the same port, we could then do

const server1 = db1.server({
  path: `/${db1}`,
  port: 3000,
})


db2.server({
  path: `/${db2}`,
  express: server1.app
})

What do you think?

[josiahruddell]

I like the implementation idea @pubkey. I'll take a stab at it soon.

[pubkey]

@josiahruddell have you started on this?
Coincidentally I also need this feature for my project. So I would implement it if you haven't.

[josiahruddell]

Yeah I'll open a PR there are some TODOs still

[pubkey]

Closed see #1156 (comment)