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use std::sync::Arc;
use async_trait::async_trait;
pub use bonsaidb_core::circulate::Relay;
use bonsaidb_core::{
circulate,
pubsub::{self, database_topic, PubSub},
Error,
};
#[async_trait]
impl PubSub for super::Database {
type Subscriber = Subscriber;
async fn create_subscriber(&self) -> Result<Self::Subscriber, bonsaidb_core::Error> {
Ok(Subscriber {
database_name: self.data.name.to_string(),
subscriber: self.data.storage.relay().create_subscriber().await,
})
}
async fn publish<S: Into<String> + Send, P: serde::Serialize + Sync>(
&self,
topic: S,
payload: &P,
) -> Result<(), bonsaidb_core::Error> {
self.data
.storage
.relay()
.publish(database_topic(&self.data.name, &topic.into()), payload)
.await?;
Ok(())
async fn publish_to_all<P: serde::Serialize + Sync>(
topics: Vec<String>,
.publish_to_all(
topics
.iter()
.map(|topic| database_topic(&self.data.name, topic))
.collect(),
payload,
)
/// A subscriber for `PubSub` messages.
pub struct Subscriber {
database_name: String,
subscriber: circulate::Subscriber,
impl pubsub::Subscriber for Subscriber {
async fn subscribe_to<S: Into<String> + Send>(&self, topic: S) -> Result<(), Error> {
self.subscriber
.subscribe_to(database_topic(&self.database_name, &topic.into()))
.await;
async fn unsubscribe_from(&self, topic: &str) -> Result<(), Error> {
let topic = format!("{}\u{0}{}", self.database_name, topic);
self.subscriber.unsubscribe_from(&topic).await;
fn receiver(&self) -> &'_ flume::Receiver<Arc<circulate::Message>> {
self.subscriber.receiver()