Struct dittolive_ditto::transport::Presence

pub struct Presence { /* private fields */ }

Presence to visualize the mesh.

Even if Ditto works as a standalone, other peers are needed to exploit it at its maximum extend : syncing data and merging it.

The Presence struct allows you to get and monitor known peers. The peers are regrouped inside a PresenceGraph.

You can get Presence using the Ditto::presence method. To have an immediate graph of peers, use Presence::exec:

let presence_graph = ditto.presence().exec();

To monitor peers, use Presence::observe to call a callback each time peers are updated:

let handle = ditto.presence().observe(|presence_graph| {
    // Do something with peers
});

Implementations

impl Presence

pub fn observe( self: &Arc<Self>, callback: impl Fn(&PresenceGraph) + Send + Sync + 'static ) -> PresenceObserver

Allow to call a callback each time there is a change in known peers. The returned PresenceObserver must be kept in scope to keep receiving updates.

pub fn exec(&self) -> PresenceGraph

Return an immediate representation of known peers