method ClusterApi.leader

Registers the leader task name (§12.6) and returns at once. Without a cluster this node is the leader of every task and body starts in the background scope of the node. In a cluster one node holds the lease of name (coordinator, D-4585): body runs there, in the background scope, and is cancelled when the node loses the lease; the other nodes wait for it.

Example:

fn main() io, time {
  cluster.leader("cleanup") {
    print("this node leads cleanup")
  }
  sleep(100ms)
}

this node leads cleanup

pub(api) fn leader<effect F>(name: str, body: fn() F)

Since. 1.0.0-beta

Parameters

Effects

none declared (pure unless the body says otherwise)

Defined in: std/core/node.oxl:336