examples/rust/src/shared/stream.rs

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// distributed with this work for additional information
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// 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,
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use iggy::clients::consumer::ReceivedMessage;
use iggy::consumer_ext::MessageConsumer;
use iggy::prelude::IggyError;

#[derive(Debug)]
pub struct PrintEventConsumer {}

impl MessageConsumer for PrintEventConsumer {
    async fn consume(&self, message: ReceivedMessage) -> Result<(), IggyError> {
        // Extract message payload as raw bytes
        let raw_message = message.message.payload.as_ref();
        // Convert raw bytes into string
        let payload = String::from_utf8_lossy(raw_message);
        // Print message
        println!(
            "Message received: {} at offset: {} in partition ID: {}",
            payload, message.message.header.offset, message.partition_id
        );

        Ok(())
    }
}