examples/rust/src/basic/producer/main.rs

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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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use iggy::prelude::*;
use iggy_examples::shared::args::Args;
use iggy_examples::shared::system;
use std::error::Error;
use std::str::FromStr;
use std::sync::Arc;
use tracing::info;
use tracing_subscriber::layer::SubscriberExt;
use tracing_subscriber::util::SubscriberInitExt;
use tracing_subscriber::{EnvFilter, Registry};

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    let args = Args::parse_with_defaults("basic-producer");
    Registry::default()
        .with(tracing_subscriber::fmt::layer())
        .with(EnvFilter::try_from_default_env().unwrap_or(EnvFilter::new("INFO")))
        .init();
    info!(
        "Basic producer has started, selected transport: {}",
        args.transport
    );
    let client_provider_config = Arc::new(ClientProviderConfig::from_args(args.to_sdk_args())?);
    let client = client_provider::get_raw_client(client_provider_config, false).await?;
    let client = IggyClient::new(client);
    client.connect().await?;
    system::init_by_producer(&args, &client).await?;
    produce_messages(&args, &client).await
}

async fn produce_messages(args: &Args, client: &dyn Client) -> Result<(), Box<dyn Error>> {
    let interval = args.get_interval();

    info!(
        "Messages will be sent to stream: {}, topic: {}, partition: {} with interval {}.",
        args.stream_id,
        args.topic_id,
        args.partition_id,
        interval.map_or("none".to_string(), |i| i.as_human_time_string())
    );
    let stream_id = args.stream_id.clone().try_into()?;
    let topic_id = args.topic_id.clone().try_into()?;
    let mut interval = interval.map(|interval| tokio::time::interval(interval.get_duration()));
    let mut current_id = 0u64;
    let mut sent_batches = 0;
    let partitioning = Partitioning::partition_id(args.partition_id);
    loop {
        if args.message_batches_limit > 0 && sent_batches == args.message_batches_limit {
            info!("Sent {sent_batches} batches of messages, exiting.");
            return Ok(());
        }

        if let Some(interval) = &mut interval {
            interval.tick().await;
        }

        let mut messages = Vec::new();
        let mut sent_messages = Vec::new();
        for _ in 0..args.messages_per_batch {
            current_id += 1;
            let payload = format!("message-{current_id}");
            let message = IggyMessage::from_str(&payload)?;
            messages.push(message);
            sent_messages.push(payload);
        }
        client
            .send_messages(&stream_id, &topic_id, &partitioning, &mut messages)
            .await?;
        sent_batches += 1;
        info!("Sent messages: {:#?}", sent_messages);
    }
}