Effect CommunityEC
Effect Community•16mo ago
TGTGamer

Handling Service Provision in Express Endpoints with Effect

So I'm trying to do the express example from the website. I've got my effect working and generating the hello-world response. That part is fine 🙂

I have a layer which defines my logging service, which has been provided to the top-level runtime, because express endpoints are running on another fiber, I don't have that service provided. Just wondering what the correct way to handle this is?

I assume do an import of the logging service and do another 
Effect.provide
, but wanted to check. I'm working in an extendable environment which doesn't necessarily know all the layers provided to the current runtime, is there a way to get the current runtime's services and pass it to this fork?

const helloWorld = Effect.gen( function* () {
    const app = yield* Express
    const runtime = yield* Effect.runtime()

    app.get(
        '/',
        (
            _,
            res
        ) => {
            Effect.runSync(
                Effect.gen( function* () {
                    // const Console = yield* ConsoleService
                    // yield* Console.warn( 'Ran hello world' )
                    return res.send( 'Hello World!' )
                } )
            )
        }
    )
} )
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