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package rpc // import "collectd.org/rpc"
import (
"collectd.org/api"
pb "collectd.org/rpc/proto/types"
"github.com/golang/protobuf/ptypes"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
)
// MarshalValue converts an api.Value to a pb.Value.
func MarshalValue(v api.Value) (*pb.Value, error) {
switch v := v.(type) {
case api.Counter:
return &pb.Value{
Value: &pb.Value_Counter{Counter: uint64(v)},
}, nil
case api.Derive:
return &pb.Value{
Value: &pb.Value_Derive{Derive: int64(v)},
}, nil
case api.Gauge:
return &pb.Value{
Value: &pb.Value_Gauge{Gauge: float64(v)},
}, nil
default:
return nil, grpc.Errorf(codes.InvalidArgument, "%T values are not supported", v)
}
}
// UnmarshalValue converts a pb.Value to an api.Value.
func UnmarshalValue(in *pb.Value) (api.Value, error) {
switch v := in.GetValue().(type) {
case *pb.Value_Counter:
return api.Counter(v.Counter), nil
case *pb.Value_Derive:
return api.Derive(v.Derive), nil
case *pb.Value_Gauge:
return api.Gauge(v.Gauge), nil
default:
return nil, grpc.Errorf(codes.InvalidArgument, "%T values are not supported", v)
}
}
// MarshalIdentifier converts an api.Identifier to a pb.Identifier.
func MarshalIdentifier(id *api.Identifier) *pb.Identifier {
return &pb.Identifier{
Host: id.Host,
Plugin: id.Plugin,
PluginInstance: id.PluginInstance,
Type: id.Type,
TypeInstance: id.TypeInstance,
}
}
// UnmarshalIdentifier converts a pb.Identifier to an api.Identifier.
func UnmarshalIdentifier(in *pb.Identifier) *api.Identifier {
return &api.Identifier{
Host: in.Host,
Plugin: in.Plugin,
PluginInstance: in.PluginInstance,
Type: in.Type,
TypeInstance: in.TypeInstance,
}
}
// MarshalValueList converts an api.ValueList to a pb.ValueList.
func MarshalValueList(vl *api.ValueList) (*pb.ValueList, error) {
t, err := ptypes.TimestampProto(vl.Time)
if err != nil {
return nil, err
}
var pbValues []*pb.Value
for _, v := range vl.Values {
pbValue, err := MarshalValue(v)
if err != nil {
return nil, err
}
pbValues = append(pbValues, pbValue)
}
return &pb.ValueList{
Values: pbValues,
Time: t,
Interval: ptypes.DurationProto(vl.Interval),
Identifier: MarshalIdentifier(&vl.Identifier),
}, nil
}
// UnmarshalValueList converts a pb.ValueList to an api.ValueList.
func UnmarshalValueList(in *pb.ValueList) (*api.ValueList, error) {
t, err := ptypes.Timestamp(in.GetTime())
if err != nil {
return nil, err
}
interval, err := ptypes.Duration(in.GetInterval())
if err != nil {
return nil, err
}
var values []api.Value
for _, pbValue := range in.GetValues() {
v, err := UnmarshalValue(pbValue)
if err != nil {
return nil, err
}
values = append(values, v)
}
return &api.ValueList{
Identifier: *UnmarshalIdentifier(in.GetIdentifier()),
Time: t,
Interval: interval,
Values: values,
DSNames: in.DsNames,
}, nil
}
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