/
grpc.go
67 lines (61 loc) · 2.04 KB
/
grpc.go
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// 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 devicetemplateconverter
import (
"bytes"
"context"
pbtypes "github.com/gogo/protobuf/types"
"go.thethings.network/lorawan-stack/pkg/errorcontext"
"go.thethings.network/lorawan-stack/pkg/ttnpb"
)
type endDeviceTemplateConverterServer struct {
DTC *DeviceTemplateConverter
}
// ListFormats implements ttnpb.DeviceTemplateServiceServer.
func (s *endDeviceTemplateConverterServer) ListFormats(ctx context.Context, _ *pbtypes.Empty) (*ttnpb.EndDeviceTemplateFormats, error) {
formats := make(map[string]*ttnpb.EndDeviceTemplateFormat, len(s.DTC.converters))
for id, converter := range s.DTC.converters {
formats[id] = converter.Format()
}
return &ttnpb.EndDeviceTemplateFormats{
Formats: formats,
}, nil
}
// Convert implements ttnpb.DeviceTemplateServiceServer.
func (s *endDeviceTemplateConverterServer) Convert(req *ttnpb.ConvertEndDeviceTemplateRequest, res ttnpb.EndDeviceTemplateConverter_ConvertServer) error {
converter, ok := s.DTC.converters[req.FormatID]
if !ok {
return errNotFound.WithAttributes("id", req.FormatID)
}
ctx, cancel := errorcontext.New(res.Context())
ch := make(chan *ttnpb.EndDeviceTemplate)
go func() {
if err := converter.Convert(ctx, bytes.NewReader(req.Data), ch); err != nil {
cancel(err)
}
}()
for {
select {
case <-ctx.Done():
return ctx.Err()
case tmpl, ok := <-ch:
if !ok {
return nil
}
if err := res.Send(tmpl); err != nil {
return err
}
}
}
}