tansu-cli 0.6.0

Tansu CLI
Documentation 
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// Copyright ⓒ 2024-2025 Peter Morgan <peter.james.morgan@gmail.com>
//
// Licensed 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 under the License.

use super::DEFAULT_BROKER;
use crate::Result;
use clap::Subcommand;
use tansu_cat::Cat;
use tansu_sans_io::ErrorCode;
use url::Url;

#[derive(Clone, Debug, Subcommand)]
pub(super) enum Command {
    /// Produce Avro/JSON/Protobuf messages to a topic
    Produce {
        /// The URL of the broker to produce messages into
        #[arg(long, default_value = DEFAULT_BROKER, env = "ADVERTISED_LISTENER_URL")]
        broker: Url,

        /// The topic to produce messages into
        #[clap(value_parser)]
        topic: String,

        /// Input filename or '-' for stdin
        #[clap(value_parser, default_value = "-")]
        file: String,

        /// The partition to produce messages into
        #[arg(long, default_value = "0")]
        partition: i32,

        /// Schema registry examples are: file://./etc/schema or s3://tansu/, containing: topic.json, topic.proto or topic.avsc
        #[arg(long, env = "SCHEMA_REGISTRY")]
        schema_registry: Option<Url>,
    },

    /// Consume Avro/JSON/Protobuf messages from a topic
    Consume {
        /// The URL of the broker to consume messages from
        #[arg(long, default_value = DEFAULT_BROKER, env = "ADVERTISED_LISTENER_URL")]
        broker: Url,

        /// The topic to consume messages from
        #[clap(value_parser)]
        topic: String,

        /// The partition to consume messages from
        #[arg(long, default_value = "0")]
        partition: i32,

        /// Schema registry examples are: file://./etc/schema or s3://tansu/, containing: topic.json, topic.proto or topic.avsc
        #[arg(long, env = "SCHEMA_REGISTRY")]
        schema_registry: Option<Url>,

        /// The maximum time in milliseconds to wait for a message
        #[arg(long, default_value = "5000")]
        max_wait_time_ms: i32,

        /// The minimum number of bytes to wait for
        #[arg(long, default_value = "1")]
        min_bytes: i32,

        /// The maximum bytes to wait for
        #[arg(long, default_value = "52428800")]
        max_bytes: Option<i32>,

        /// The fetch offset to start from
        #[arg(long, default_value = "0")]
        fetch_offset: i64,

        /// The partition to consume from
        #[arg(long, default_value = "1048576")]
        partition_max_bytes: i32,
    },
}

impl From<Command> for Cat {
    fn from(value: Command) -> Self {
        match value {
            Command::Produce {
                broker,
                topic,
                file,
                partition,
                schema_registry,
            } => Cat::produce()
                .broker(broker)
                .topic(topic)
                .partition(partition)
                .schema_registry(schema_registry)
                .file_name(file)
                .build(),

            Command::Consume {
                broker,
                topic,
                partition,
                schema_registry,
                max_wait_time_ms,
                min_bytes,
                max_bytes,
                fetch_offset,
                partition_max_bytes,
            } => Cat::consume()
                .broker(broker)
                .topic(topic)
                .partition(partition)
                .schema_registry(schema_registry)
                .max_wait_time_ms(max_wait_time_ms)
                .min_bytes(min_bytes)
                .max_bytes(max_bytes)
                .fetch_offset(fetch_offset)
                .partition_max_bytes(partition_max_bytes)
                .build(),
        }
    }
}

impl Command {
    pub(super) async fn main(self) -> Result<ErrorCode> {
        Cat::from(self).main().await.map_err(Into::into)
    }
}