mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
105 lines
3.1 KiB
Go
105 lines
3.1 KiB
Go
/*
|
|
*
|
|
* Copyright 2014 gRPC authors.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
package grpc
|
|
|
|
import (
|
|
"google.golang.org/grpc/encoding"
|
|
_ "google.golang.org/grpc/encoding/proto" // to register the Codec for "proto"
|
|
"google.golang.org/grpc/mem"
|
|
)
|
|
|
|
// baseCodec captures the new encoding.CodecV2 interface without the Name
|
|
// function, allowing it to be implemented by older Codec and encoding.Codec
|
|
// implementations. The omitted Name function is only needed for the register in
|
|
// the encoding package and is not part of the core functionality.
|
|
type baseCodec interface {
|
|
Marshal(v any) (mem.BufferSlice, error)
|
|
Unmarshal(data mem.BufferSlice, v any) error
|
|
}
|
|
|
|
// getCodec returns an encoding.CodecV2 for the codec of the given name (if
|
|
// registered). Initially checks the V2 registry with encoding.GetCodecV2 and
|
|
// returns the V2 codec if it is registered. Otherwise, it checks the V1 registry
|
|
// with encoding.GetCodec and if it is registered wraps it with newCodecV1Bridge
|
|
// to turn it into an encoding.CodecV2. Returns nil otherwise.
|
|
func getCodec(name string) encoding.CodecV2 {
|
|
if codecV1 := encoding.GetCodec(name); codecV1 != nil {
|
|
return newCodecV1Bridge(codecV1)
|
|
}
|
|
|
|
return encoding.GetCodecV2(name)
|
|
}
|
|
|
|
func newCodecV0Bridge(c Codec) baseCodec {
|
|
return codecV0Bridge{codec: c}
|
|
}
|
|
|
|
func newCodecV1Bridge(c encoding.Codec) encoding.CodecV2 {
|
|
return codecV1Bridge{
|
|
codecV0Bridge: codecV0Bridge{codec: c},
|
|
name: c.Name(),
|
|
}
|
|
}
|
|
|
|
var _ baseCodec = codecV0Bridge{}
|
|
|
|
type codecV0Bridge struct {
|
|
codec interface {
|
|
Marshal(v any) ([]byte, error)
|
|
Unmarshal(data []byte, v any) error
|
|
}
|
|
}
|
|
|
|
func (c codecV0Bridge) Marshal(v any) (mem.BufferSlice, error) {
|
|
data, err := c.codec.Marshal(v)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return mem.BufferSlice{mem.NewBuffer(&data, nil)}, nil
|
|
}
|
|
|
|
func (c codecV0Bridge) Unmarshal(data mem.BufferSlice, v any) (err error) {
|
|
return c.codec.Unmarshal(data.Materialize(), v)
|
|
}
|
|
|
|
var _ encoding.CodecV2 = codecV1Bridge{}
|
|
|
|
type codecV1Bridge struct {
|
|
codecV0Bridge
|
|
name string
|
|
}
|
|
|
|
func (c codecV1Bridge) Name() string {
|
|
return c.name
|
|
}
|
|
|
|
// Codec defines the interface gRPC uses to encode and decode messages.
|
|
// Note that implementations of this interface must be thread safe;
|
|
// a Codec's methods can be called from concurrent goroutines.
|
|
//
|
|
// Deprecated: use encoding.Codec instead.
|
|
type Codec interface {
|
|
// Marshal returns the wire format of v.
|
|
Marshal(v any) ([]byte, error)
|
|
// Unmarshal parses the wire format into v.
|
|
Unmarshal(data []byte, v any) error
|
|
// String returns the name of the Codec implementation. This is unused by
|
|
// gRPC.
|
|
String() string
|
|
}
|