/
grpc_lz4.go
74 lines (61 loc) · 1.26 KB
/
grpc_lz4.go
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package grpcutil
import (
"io"
"io/ioutil"
"sync"
"github.com/pierrec/lz4"
"google.golang.org/grpc"
)
// compressor compresses gRPC messages using LZ4
type compressor struct {
alg string
pool sync.Pool
}
// NewLZ4Compressor returns a new LZ4 compressor instance.
func NewLZ4Compressor() grpc.Compressor {
return &compressor{
alg: "lz4",
pool: sync.Pool{
New: func() interface{} {
return lz4.NewWriter(ioutil.Discard)
},
},
}
}
func (c *compressor) Do(w io.Writer, p []byte) error {
lzw := c.pool.Get().(*lz4.Writer)
defer c.pool.Put(lzw)
lzw.Reset(w)
if _, err := lzw.Write(p); err != nil {
return err
}
return lzw.Close()
}
func (c *compressor) Type() string {
return c.alg
}
// decompressor decompresses gRPC messages using LZ4
type decompressor struct {
alg string
pool sync.Pool
}
// NewLZ4Decompressor returns a new LZ4 decompressor instance.
func NewLZ4Decompressor() grpc.Decompressor {
return &decompressor{
alg: "lz4",
pool: sync.Pool{
New: func() interface{} {
return lz4.NewReader(nil)
},
},
}
}
func (d *decompressor) Do(r io.Reader) ([]byte, error) {
lzr := d.pool.Get().(*lz4.Reader)
defer d.pool.Put(lzr)
lzr.Reset(r)
return ioutil.ReadAll(lzr)
}
func (d *decompressor) Type() string {
return d.alg
}