crabka-client-streams

KIP-1071 Kafka Streams rebalance-protocol client for Apache Kafka in Rust.

This crate is part of Crabka, a Rust implementation of Kafka-compatible infrastructure and clients.

Install

crabka-client-streams = "0.3.2"

For workspace development, use the path dependency from this repository instead.

Usage example

Build and run a simple source-to-sink topology using the KIP-1071 membership client:

use std::sync::Arc;
use crabka_client_streams::{StreamsEvent, StreamsMembership, StringSerde, Topology};

# async fn run() -> Result<(), Box<dyn std::error::Error>> {
let mut topo = Topology::new();
let src = topo.add_source("src", ["input-topic"], (StringSerde, StringSerde));
topo.add_sink("snk", "output-topic", [&src], (StringSerde, StringSerde));
let built = topo.build("orders-stream")?;

let mut membership = StreamsMembership::builder()
    .bootstrap("127.0.0.1:9092")
    .group_id("orders-stream")
    .topology(Arc::new(built))
    .build()
    .await?;

if let StreamsEvent::Assigned(assignment) = membership.next_event().await? {
    println!("active tasks: {:?}", assignment.active);
}
# Ok(())
# }

Documentation

API documentation is published on docs.rs/crabka-client-streams. The repository README contains project-wide setup, development, and release notes.

License

Apache-2.0. See the repository LICENSE and NOTICE files for details.