once() #

Available since 2.9.0

Listens to an event emitted with BackendCluster.broadcast.

The registered listener will be called exactly once, after which it will be removed from the listeners list.

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once (event: string, listener: ClusterEventHandler): Promise<void>

Argument	Type	Description
event	string	Event name
listener	ClusterEventHandler	Listener function. Called exactly once.

Usage #

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app.cluster.once('some:event', payload => {
  // ...listener code...
})