could i get client acknowledgment in server when server emits an event?

[Chellhooo]

Hi! I want to let server receive client response when emit an event, and i found it can achieve in socket.io via acknowledgements. But I failed to implement with feathers service, but succeeded with socket.io socket api. Could someone help that how can I implement it in feathers way? Thank you!!!

Here is how it implement in service, but failed:

// server
export class TestService<ServiceParams extends TestParams = TestParams>
	extends EventEmitter // import from node:events
	implements ServiceInterface<Test, TestData, ServiceParams>
{
	constructor(public options: TestServiceOptions) {
		super()
	}

	async create(data: TestData, params?: ServiceParams): Promise<Test> {
		// client listener is not triggered!
		this.emit('testEvent', 1234, (res: any) => {
			console.log(res)
		})

		// client listener catch it !
		// this.emit('task', 1234)

		return data
	}
}

// client
app.service('test').on('testEvent', (data: any, cb: any) => {
	console.log('event data', data)
	cb({received: true})
})

I try doing the same using socket as below, it works as expected.

// server
app.configure(
	socketio(
		{},
		io => {
			io.on('connection', (reason: any) => {
				io.timeout(20000).emit('test testEvent', 1234, (err: any, res: any) => {
					console.log('response from client:', res)
				})
			})
		}
	)
)
// client 
app.service('test').on('testEvent', (data: any, cb: any) => {
	console.log('event data', data)
	cb({received: true})
})