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writer.go
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writer.go
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package gpu
import (
"context"
"github.com/goat-project/goat-os/writer"
"github.com/golang/protobuf/ptypes/empty"
"github.com/goat-project/goat-os/constants"
"github.com/spf13/viper"
"golang.org/x/time/rate"
"google.golang.org/grpc"
pb "github.com/goat-project/goat-proto-go"
log "github.com/sirupsen/logrus"
)
// Writer structure to write gpu data to Goat server.
type Writer struct {
Stream pb.AccountingService_ProcessGPUsClient
rateLimiter *rate.Limiter
}
// CreateWriter creates Writer for gpu data.
func CreateWriter(limiter *rate.Limiter) *Writer {
return &Writer{
rateLimiter: limiter,
}
}
// SetUp creates gRPC client and sets up Stream to process gpu data to Writer.
func (w *Writer) SetUp(conn *grpc.ClientConn) {
// create grpc client
grpcClient := pb.NewAccountingServiceClient(conn)
// create Stream to process GPUs
stream, err := grpcClient.ProcessGPUs(context.Background())
if err != nil {
log.WithFields(log.Fields{"error": err}).Fatal("error create gRPC client stream")
}
w.Stream = stream
}
// Write writes GPU record to Goat server.
func (w *Writer) Write(record writer.Record) error {
rec := record.(*pb.GPURecord)
gpuData := &pb.GPUData{
Data: &pb.GPUData_Gpu{
Gpu: rec,
},
}
return w.Stream.Send(gpuData)
}
// SendIdentifier sends identifier to Goat server.
func (w *Writer) SendIdentifier() error {
gpuDataIdentifier := pb.GPUData_Identifier{Identifier: viper.GetString(constants.CfgIdentifier)}
data := &pb.GPUData{
Data: &gpuDataIdentifier,
}
return w.Stream.Send(data)
}
// Close gets to know to the goat server that a writing is finished and a response is expected.
func (w *Writer) Close() (*empty.Empty, error) {
return w.Stream.CloseAndRecv()
}