liminal-server 0.25.4

Standalone server for the liminal messaging bus
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

//! Agent metadata advances the existing console publisher by a signal.

use super::{ConsoleError, ConsoleHub};

impl ConsoleHub {
    /// Makes a real metadata change due without inventing a worker or a flow.
    ///
    /// # Errors
    /// The topology lock or revision counter is unavailable.
    pub fn agent_changed(&self) -> Result<(), ConsoleError> {
        let mut state = self.lock_topology()?;
        let next = state
            .model
            .rev()
            .checked_add(1)
            .ok_or(ConsoleError::TopologyRevisionOverflow)?;
        state.model.ensure_revision(next);
        state.stale = true;
        let due = state.subscribers > 0;
        drop(state);
        if due {
            self.wake();
        }
        Ok(())
    }
}