use async_trait::async_trait;
use neutron::{Client, ConsumerBuilder, ConsumerEngine, ConsumerPlugin, NeutronError};
use serde::{Deserialize, Serialize};
#[derive(Debug, Clone, Deserialize, Serialize)]
#[allow(dead_code)]
struct Data {
name: String,
}
impl TryFrom<Vec<u8>> for Data {
type Error = Box<dyn std::error::Error>;
fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
Ok(Data {
name: String::from_utf8(value).unwrap(),
})
}
}
impl From<Data> for Vec<u8> {
fn from(val: Data) -> Self {
val.name.as_bytes().to_vec()
}
}
pub struct PayloadLoggerPlugin;
pub struct AutoAckPlugin;
#[async_trait]
impl ConsumerPlugin<Client, Data> for PayloadLoggerPlugin {
async fn on_message(
&mut self,
_: &neutron::Consumer<Client, Data>,
message: neutron::Message<Data>,
) -> Result<(), NeutronError> {
log::info!("Received message: {:?}", message.payload);
Ok(())
}
}
#[async_trait]
impl ConsumerPlugin<Client, Data> for AutoAckPlugin {
async fn on_message(
&mut self,
consumer: &neutron::Consumer<Client, Data>,
message: neutron::Message<Data>,
) -> Result<(), NeutronError> {
consumer.ack(&message.ack).await?;
Ok(())
}
}
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
env_logger::init();
let pulsar_config = neutron::PulsarConfig {
endpoint_url: "pulsar://127.0.0.1".to_string(),
endpoint_port: 6650,
};
let pulsar = neutron::PulsarBuilder::new()
.with_config(pulsar_config)
.build()
.run();
let consumer_a = ConsumerBuilder::new()
.with_topic("test")
.with_subscription("test")
.with_consumer_name("A")
.add_plugin(AutoAckPlugin)
.add_plugin(PayloadLoggerPlugin)
.connect(&pulsar)
.await?;
let consumer_b = ConsumerBuilder::new()
.with_topic("test")
.with_subscription("test")
.with_consumer_name("B")
.add_plugin(AutoAckPlugin)
.add_plugin(PayloadLoggerPlugin)
.connect(&pulsar)
.await?;
let _handle = tokio::join!(consumer_a.consume(), consumer_b.consume());
Ok(())
}