@jamsocket/types

Types for the Jamsocket JavaScript/TypeScript client libraries. Normally this package doesn’t need to be included as a dependency as these types are re-exported by @jamsocket/server, @jamsocket/client, @jamsocket/react and @jamsocket/socketio.

Installation

npm install @jamsocket/types

Example

Here’s an example of how different parts of Jamsocket’s client libraries work together.

server.tsx

import { Jamsocket } from '@jamsocket/server'
 
const jamsocket = new Jamsocket({
   account: '[YOUR ACCOUNT]',
   token: '[YOUR TOKEN]',
   service: '[YOUR SERVICE]',
   // during development, you can simply pass { dev: true }
})
 
const connectResponse = await jamsocket.connect() // returns an instance of ConnectResponse

client.tsx

import {
  SessionBackendProvider, SocketIOProvider,
  useEventListener, useSend, useReady
} from '@jamsocket/socketio'
 
function Root() {
  return(
    <SessionBackendProvider connectResponse={connectResponse}>
      <SocketIOProvider url={connectResponse.url}>
        <MyComponent />
      </SocketIOProvider>
    </SessionBackendProvider>
  )
}
 
function MyComponent() {
  const ready = useReady()
  const sendEvent = useSend()
 
  useEffect(() => {
    if (ready) {
      sendEvent('some-event', someValue)
    }
  }, [ready])
 
  useEventListener('another-event', (args) => {
    // do something when receiving an event message from your session backend...
  })
}

Library Reference

@jamsocket/types

type ConnectResponse = {
  backend_id: string
  spawned: boolean
  status: BackendStatus
  token: string
  url: string
  secret_token?: string | null
  status_url: string
  ready_url: string
}
 
type ConnectRequest = {
  key?: string
  spawn?:
    | boolean
    | {
        tag?: string
        cluster?: string
        lifetime_limit_seconds?: number
        max_idle_seconds?: number
        executable?: {
          mount?: string | boolean
          env?: Record<string, string>
          resource_limits?: {
            // The CPU period (in microseconds), defaults to 100_000 (100ms)
            cpu_period?: number
            // Proportion of period the container is allowed to use (in percent, e.g. 100 = 100%)
            cpu_period_percent?: number
            // Total cpu time allocated to container (in seconds)
            cpu_time_limit?: number
            memory_limit_bytes?: number
            disk_limit_bytes?: number
          }
        }
      }
  user?: string
  auth?: Record<string, any>
}
 
type BackendStatus =
  | 'scheduled'
  | 'loading'
  | 'starting'
  | 'waiting'
  | 'ready'
  | 'terminating'
  | 'hard-terminating'
  | 'terminated'
 
type TerminationKind = 'soft' | 'hard'
type TerminationReason = 'swept' | 'external' | 'keyexpired' | 'lost' | 'startuptimeout' | 'internalerror'
 
type BackendState =
  | { status: 'scheduled'; time: string }
  | { status: 'loading'; time: string }
  | { status: 'starting'; time: string }
  | { status: 'waiting'; time: string }
  | { status: 'ready'; time: string }
  | { status: 'terminating'; time: string; termination_reason: TerminationReason }
  | { status: 'hard-terminating'; time: string; termination_reason: TerminationReason }
  | {
      status: 'terminated'
      time: string
      termination_reason?: TerminationReason | null
      termination_kind?: TerminationKind | null
      exit_error?: boolean | null
    }

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