harn-stdlib 0.8.18

Embedded Harn standard library source catalog
Documentation 
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/**
 * std/monitors - wait for changing external state with poll-to-push optimization.
 *
 * Import with: `import "std/monitors"`.
 */
type MonitorWaitStatus = "matched" | "timed_out" | "interrupted"

type MonitorPollContext = {wait_id: string, poll_count: int, last_push_event: any}

type MonitorSource = {
  label?: string,
  poll: fn(MonitorPollContext) -> any,
  prefers_push?: bool,
  push_filter?: fn(any) -> bool,
}

type MonitorWaitOptions = {
  wait_id?: string,
  timeout: duration,
  poll_interval?: duration,
  source: MonitorSource,
  condition: fn(any) -> bool,
}

type MonitorWaitResult = {
  wait_id: string,
  status: MonitorWaitStatus,
  source_label: string?,
  started_at: string,
  resolved_at: string,
  state: any,
  condition_value: any,
  poll_count: int,
  push_wake_count: int,
  trace_id: string?,
  replay_of_event_id: string?,
  reason: string?,
}

/** wait_for. */
pub fn wait_for(options: MonitorWaitOptions) -> MonitorWaitResult {
  return monitor_wait_for_native(options)
}