examples/rust/src/stream-builder/stream-consumer/main.rs

/* Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 */

use iggy::prelude::*;
use iggy_examples::shared::stream::PrintEventConsumer;
use tokio::sync::oneshot;

const IGGY_URL: &str = "iggy://iggy:iggy@localhost:8090";

#[tokio::main]
async fn main() -> Result<(), IggyError> {
    println!("Build iggy client & consumer");
    //For customization, use the `new` or `from_stream_topic` constructor
    let config = IggyConsumerConfig::default();
    let (client, mut consumer) =
        IggyStreamConsumer::with_client_from_url(IGGY_URL, &config).await?;

    println!("Start message stream");
    let (tx, rx) = oneshot::channel();
    tokio::spawn(async move {
        match consumer
            // PrintEventConsumer is imported from examples/src/shared/stream.rs
            .consume_messages(&PrintEventConsumer {}, rx)
            .await
        {
            Ok(_) => {}
            Err(err) => eprintln!("Failed to consume messages: {err}"),
        }
    });

    // Wait a bit for all messages to arrive.
    tokio::time::sleep(tokio::time::Duration::from_secs(10)).await;
    println!("Stop the message stream and shutdown iggy client");
    tx.send(()).expect("Failed to send shutdown signal");
    client.shutdown().await?;
    Ok(())
}