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resource.go
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/
resource.go
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package grpc
import (
"context"
"errors"
"github.com/jhump/protoreflect/dynamic/grpcdynamic"
"go.viam.com/utils/rpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"go.viam.com/rdk/resource"
)
// UnimplementedError is returned any time a gRPC method is unimplemented.
var UnimplementedError = status.Error(codes.Unimplemented, codes.Unimplemented.String())
// An ForeignResource is used to dynamically invoke RPC calls to resources that have their
// RPC information dervied on demand.
type ForeignResource struct {
resource.Named
resource.TriviallyCloseable
conn rpc.ClientConn
}
// NewForeignResource returns an ForeignResource for the given resource name and
// connection serving it.
func NewForeignResource(name resource.Name, conn rpc.ClientConn) *ForeignResource {
return &ForeignResource{Named: name.AsNamed(), conn: conn}
}
// Reconfigure always fails.
func (res *ForeignResource) Reconfigure(ctx context.Context, deps resource.Dependencies, conf resource.Config) error {
return errors.New("this resource cannot be reconfigured")
}
// NewStub returns a new gRPC client stub used to communicate with the resource.
func (res *ForeignResource) NewStub() grpcdynamic.Stub {
return grpcdynamic.NewStub(res.conn)
}