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ipc_compression.rs
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ipc_compression.rs
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// Licensed to the Apache Software Foundation (ASF) under one
// 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::ipc::CompressionType;
#[derive(Debug, Clone, Copy, PartialEq)]
pub enum CompressionCodecType {
Lz4Frame,
Zstd,
}
impl From<CompressionType> for CompressionCodecType {
fn from(compression_type: CompressionType) -> Self {
match compression_type {
CompressionType::ZSTD => CompressionCodecType::Zstd,
CompressionType::LZ4_FRAME => CompressionCodecType::Lz4Frame,
other_type => {
unimplemented!("Not support compression type: {:?}", other_type)
}
}
}
}
impl From<CompressionCodecType> for CompressionType {
fn from(codec: CompressionCodecType) -> Self {
match codec {
CompressionCodecType::Lz4Frame => CompressionType::LZ4_FRAME,
CompressionCodecType::Zstd => CompressionType::ZSTD,
}
}
}
#[cfg(any(feature = "ipc_compression", test))]
mod compression_function {
use crate::error::Result;
use crate::ipc::compression::ipc_compression::CompressionCodecType;
use std::io::{Read, Write};
impl CompressionCodecType {
pub fn compress(&self, input: &[u8], output: &mut Vec<u8>) -> Result<()> {
match self {
CompressionCodecType::Lz4Frame => {
let mut encoder = lz4::EncoderBuilder::new().build(output)?;
encoder.write_all(input)?;
match encoder.finish().1 {
Ok(_) => Ok(()),
Err(e) => Err(e.into()),
}
}
CompressionCodecType::Zstd => {
let mut encoder = zstd::Encoder::new(output, 0)?;
encoder.write_all(input)?;
match encoder.finish() {
Ok(_) => Ok(()),
Err(e) => Err(e.into()),
}
}
}
}
pub fn decompress(&self, input: &[u8], output: &mut Vec<u8>) -> Result<usize> {
let result: Result<usize> = match self {
CompressionCodecType::Lz4Frame => {
let mut decoder = lz4::Decoder::new(input)?;
match decoder.read_to_end(output) {
Ok(size) => Ok(size),
Err(e) => Err(e.into()),
}
}
CompressionCodecType::Zstd => {
let mut decoder = zstd::Decoder::new(input)?;
match decoder.read_to_end(output) {
Ok(size) => Ok(size),
Err(e) => Err(e.into()),
}
}
};
result
}
}
}
#[cfg(test)]
mod tests {
use crate::ipc::compression::ipc_compression::CompressionCodecType;
#[test]
fn test_lz4_compression() {
let input_bytes = "hello lz4".as_bytes();
let codec: CompressionCodecType = CompressionCodecType::Lz4Frame;
let mut output_bytes: Vec<u8> = Vec::new();
codec.compress(input_bytes, &mut output_bytes).unwrap();
let mut result_output_bytes: Vec<u8> = Vec::new();
codec
.decompress(output_bytes.as_slice(), &mut result_output_bytes)
.unwrap();
assert_eq!(input_bytes, result_output_bytes.as_slice());
}
#[test]
fn test_zstd_compression() {
let input_bytes = "hello zstd".as_bytes();
let codec: CompressionCodecType = CompressionCodecType::Zstd;
let mut output_bytes: Vec<u8> = Vec::new();
codec.compress(input_bytes, &mut output_bytes).unwrap();
let mut result_output_bytes: Vec<u8> = Vec::new();
codec
.decompress(output_bytes.as_slice(), &mut result_output_bytes)
.unwrap();
assert_eq!(input_bytes, result_output_bytes.as_slice());
}
}