iggy 0.11.0-edge.4

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// or more contributor license agreements.  See the NOTICE file
// 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
// under the License.

use crate::tcp::tcp_stream::ConnectionStream;
use async_trait::async_trait;
use bytes::BytesMut;
use iggy_common::IggyError;
use std::net::SocketAddr;
use tokio::io::{AsyncReadExt, AsyncWriteExt, BufReader, BufWriter};
use tokio::net::TcpStream;
use tokio::net::tcp::{OwnedReadHalf, OwnedWriteHalf};
use tracing::error;

#[derive(Debug)]
pub struct TcpConnectionStream {
    client_address: SocketAddr,
    reader: BufReader<OwnedReadHalf>,
    writer: BufWriter<OwnedWriteHalf>,
}

impl TcpConnectionStream {
    pub fn new(client_address: SocketAddr, stream: TcpStream) -> Self {
        let (reader, writer) = stream.into_split();
        Self {
            client_address,
            reader: BufReader::new(reader),
            writer: BufWriter::new(writer),
        }
    }

    pub async fn read_buf(&mut self, buf: &mut BytesMut, len: usize) -> Result<(), IggyError> {
        let target_len = buf.len() + len;
        while buf.len() < target_len {
            let read = self.reader.read_buf(buf).await.map_err(|error| {
                error!(
                    "Failed to read data by client: {} from the TCP connection: {error}",
                    self.client_address
                );
                IggyError::TcpError
            })?;
            if read == 0 {
                error!(
                    "Failed to read data by client: {} from the TCP connection: unexpected EOF",
                    self.client_address
                );
                return Err(IggyError::TcpError);
            }
        }
        Ok(())
    }
}

#[async_trait]
impl ConnectionStream for TcpConnectionStream {
    async fn read(&mut self, buf: &mut [u8]) -> Result<usize, IggyError> {
        self.reader.read_exact(buf).await.map_err(|error| {
            error!(
                "Failed to read data by client: {} from the TCP connection: {error}",
                self.client_address
            );
            IggyError::TcpError
        })
    }

    async fn write(&mut self, buf: &[u8]) -> Result<(), IggyError> {
        self.writer.write_all(buf).await.map_err(|error| {
            error!(
                "Failed to write data by client: {} to the TCP connection: {error}",
                self.client_address
            );
            IggyError::TcpError
        })
    }

    async fn flush(&mut self) -> Result<(), IggyError> {
        self.writer.flush().await.map_err(|error| {
            error!(
                "Failed to flush data by client: {} to the TCP connection: {error}",
                self.client_address
            );
            IggyError::TcpError
        })
    }

    async fn shutdown(&mut self) -> Result<(), IggyError> {
        self.writer.shutdown().await.map_err(|error| {
            error!(
                "Failed to shutdown the TCP connection by client: {} to the TCP connection: {error}",
                self.client_address
            );
            IggyError::TcpError
        })
    }
}