Manage collections of ready-resources keyed by IDs, ensuring that the same resource is never concurrently opened more than once.
const ReadyResourceMap = require('ready-resource-map')
const m = new ReadyResourceMap()
// r1 === r2
const [r1, r2] = await Promise.all([
m.open('my-id', create),
m.open('my-id', create)
])
m.close('my-id')
// Will wait for the above close to resolve before overwriting 'my-id'
const r3 = await m.open('my-id', create)
function create () {
// MyResource extends ReadyResource
return new MyResource()
}MIT