appdata

type AppData struct {
	TerminateCh chan struct{}   // terminate self
	Client      *spanner.Client // spanner client
	FleetOp     *hedge.Op       // our fleet orchestrator

	// Our resettable timer telling us if we have a leader.
	LeaderActive *timedoff.TimedOff

	// The current leader's id. Zero means no leader.
	LeaderId int64
}