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service.go
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service.go
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package gotensor
import (
tf "github.com/tensorflow/tensorflow/tensorflow/go"
)
type Service struct {
Sess *tf.Session
Graph *tf.Graph
}
type Edge struct {
OpName string
Index int
}
type Feed struct {
Edge Edge
Tensor Tensor
}
type Request struct {
Feeds []Feed
Fetches []Edge
Targets []string
}
type Response struct {
Error string
Outputs []Tensor
}
func New(graph []byte) (*Service, error) {
g := tf.NewGraph()
err := g.Import(graph, "")
if err != nil {
return nil, err
}
s, err := tf.NewSession(g, nil)
if err != nil {
return nil, err
}
return &Service{Sess: s, Graph: g}, nil
}
func (s *Service) Run(req Request, resp *Response) error {
feeds := make(map[tf.Output]*tf.Tensor)
for _, f := range req.Feeds {
feeds[s.Graph.Operation(f.Edge.OpName).Output(f.Edge.Index)] = f.Tensor.Tensor
}
fetches := make([]tf.Output, len(req.Fetches))
for i, f := range req.Fetches {
fetches[i] = s.Graph.Operation(f.OpName).Output(f.Index)
}
targets := make([]*tf.Operation, len(req.Targets))
for i, t := range req.Targets {
targets[i] = s.Graph.Operation(t)
}
tensors, err := s.Sess.Run(feeds, fetches, targets)
if err != nil {
resp.Error = err.Error()
return nil
}
if len(tensors) == 0 {
return nil
}
resp.Outputs = make([]Tensor, len(tensors))
for i, t := range tensors {
resp.Outputs[i] = Tensor{t}
}
return nil
}