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payload_codec.go
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/
payload_codec.go
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/*
* Copyright 2021 CloudWeGo 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 remote
import (
"context"
"fmt"
"github.com/cloudwego/kitex/pkg/serviceinfo"
)
var payloadCodecs = make(map[serviceinfo.PayloadCodec]PayloadCodec)
// PayloadCodec is used to marshal and unmarshal payload.
type PayloadCodec interface {
Marshal(ctx context.Context, message Message, out ByteBuffer) error
Unmarshal(ctx context.Context, message Message, in ByteBuffer) error
Name() string
}
// GetPayloadCodec gets desired payload codec from message.
func GetPayloadCodec(message Message) (PayloadCodec, error) {
if message.PayloadCodec() != nil {
return message.PayloadCodec(), nil
}
ct := message.ProtocolInfo().CodecType
pc := payloadCodecs[ct]
if pc == nil {
return nil, fmt.Errorf("payload codec not found with codecType=%v", ct)
}
return pc, nil
}
// PutPayloadCode puts the desired payload codec to message.
func PutPayloadCode(name serviceinfo.PayloadCodec, v PayloadCodec) {
payloadCodecs[name] = v
}