### Construct Kafka Protocol Messages with Builder Methods in Rust

Source: https://github.com/tychedelia/kafka-protocol-rs/blob/main/README.md

This example illustrates an alternative, more idiomatic way to construct Kafka protocol messages in Rust using builder-style methods. It shows how to chain calls like `with_client_id` and `with_request_api_key` for `RequestHeader` and `MetadataRequest`, leading to more concise and readable code.

```Rust
use kafka_protocol::messages::{ApiKey, MetadataRequest, RequestHeader};
use kafka_protocol::protocol::StrBytes;

let header = RequestHeader::default()
    .with_client_id(Some(StrBytes::from_static_str("my-client")))
    .with_request_api_key(ApiKey::Metadata as i16)
    .with_request_api_version(12);

let request = MetadataRequest::default()
    .with_topics(None)
    .with_allow_auto_topic_creation(true);
```

--------------------------------

### Deserialize Kafka Protocol Messages from Bytes in Rust

Source: https://github.com/tychedelia/kafka-protocol-rs/blob/main/README.md

This Rust example shows how to deserialize a byte array back into a Kafka protocol message, using `ApiVersionsRequest` as an example. It leverages the `Decodable` trait, emphasizing the need to provide the matching API version for accurate parsing of the incoming byte stream.

```Rust
use bytes::Bytes;
use kafka_protocol::messages::ApiVersionsRequest;
use kafka_protocol::protocol::Decodable;

let bytes: [u8; 25] = [
        0x12, 0x61, 0x70, 0x61, 0x63, 0x68, 0x65, 0x2d,
        0x6b, 0x61, 0x66, 0x6b, 0x61, 0x2d, 0x6a, 0x61,
        0x76, 0x61, 0x06, 0x32, 0x2e, 0x38, 0x2e, 0x30,
        0x00
];
 
let res = ApiVersionsRequest::decode(&mut Bytes::from(bytes.to_vec()), 3).unwrap();
```

--------------------------------

### Migrating Kafka Protocol Rust Map Lookups from IndexMap to Vec

Source: https://github.com/tychedelia/kafka-protocol-rs/blob/main/CHANGELOG.md

This snippet demonstrates how to adapt code that previously used `IndexMap<K, V>` for map lookups in `kafka-protocol-rs` responses. Following a change in v0.13.0 where map types were converted to `Vec<V>`, direct `.get()` calls are no longer available. The example shows how to replace an `IndexMap` lookup with an iterative search on the `Vec`.

```Rust
// Old approach (IndexMap)
// responses.get(name)

// New approach (Vec) to achieve similar lookup
responses.iter().find(|x| x.name == name)
```

--------------------------------

### Construct Kafka Protocol Messages with Default::default in Rust

Source: https://github.com/tychedelia/kafka-protocol-rs/blob/main/README.md

This Rust snippet demonstrates how to create Kafka protocol messages, such as `RequestHeader` and `MetadataRequest`, by initializing them with `Default::default()`. It then shows how to set individual fields like `client_id` and `request_api_key` directly, providing a basic way to build messages.

```Rust
use kafka_protocol::messages::{ApiKey, MetadataRequest, RequestHeader};
use kafka_protocol::protocol::StrBytes;

let mut header = RequestHeader::default();
header.client_id = Some(StrBytes::from_static_str("my-client"));
header.request_api_key = ApiKey::Metadata as i16;
header.request_api_version = 12;

let mut request = MetadataRequest::default();
request.topics = None;
request.allow_auto_topic_creation = true;
```

--------------------------------

### Serialize Kafka Protocol Messages to Bytes in Rust

Source: https://github.com/tychedelia/kafka-protocol-rs/blob/main/README.md

This Rust snippet demonstrates how to serialize a Kafka protocol message, specifically `MetadataRequest`, into a `bytes::BytesMut` buffer. It utilizes the `Encodable` trait, requiring the correct API version to be passed for successful encoding into the byte stream.

```Rust
use bytes::BytesMut;
use kafka_protocol::messages::MetadataRequest;
use kafka_protocol::protocol::Encodable;

let mut bytes = BytesMut::new();
let request = MetadataRequest::default();
request.encode(&mut bytes, 12).unwrap();
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.