pulsar/internal/compression/zstd_cgo.go

// 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.

// +build cgo

// If CGO is enabled, use ZSTD library that links with official
// C based zstd which provides better performance compared with
// respect to the native Go implementation of ZStd.

package compression

import (
	zstd "github.com/valyala/gozstd"
)

type zstdCGoProvider struct {
	compressionLevel int
}

func newCGoZStdProvider(compressionLevel int) Provider {
	return &zstdCGoProvider{
		compressionLevel: compressionLevel,
	}
}

func NewZStdProvider() Provider {
	return newCGoZStdProvider(zstd.DefaultCompressionLevel)
}

func (*zstdCGoProvider) CanCompress() bool {
	return true
}

func (z *zstdCGoProvider) Compress(data []byte) []byte {
	return zstd.CompressLevel(nil, data, z.compressionLevel)
}

func (z *zstdCGoProvider) Decompress(compressedData []byte, originalSize int) ([]byte, error) {
	return zstd.Decompress(nil, compressedData)
}