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/*
* === This file is part of ALICE O² ===
*
* Copyright 2018 CERN and copyright holders of ALICE O².
* Author: Teo Mrnjavac <teo.mrnjavac@cern.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In applying this license CERN does not waive the privileges and
* immunities granted to it by virtue of its status as an
* Intergovernmental Organization or submit itself to any jurisdiction.
*/
// Package executorcmd contains the gRPC client, as well as facilities
// for processing and committing incoming transition events.
package executorcmd
import (
"context"
"github.com/k0kubun/pp"
"google.golang.org/grpc"
"fmt"
"github.com/AliceO2Group/Control/executor/protos"
"time"
"github.com/AliceO2Group/Control/common/logger"
"github.com/sirupsen/logrus"
"github.com/AliceO2Group/Control/executor/executorcmd/transitioner"
"google.golang.org/grpc/status"
"errors"
"encoding/json"
"strconv"
"github.com/AliceO2Group/Control/common/controlmode"
)
var log = logger.New(logrus.StandardLogger(), "executorcmd")
func NewClient(controlPort uint64, controlMode controlmode.ControlMode) *RpcClient {
endpoint := fmt.Sprintf("127.0.0.1:%d", controlPort)
log.WithField("endpoint", endpoint).Debug("starting new gRPC client")
cxt, cancel := context.WithTimeout(context.Background(), 20*time.Second)
conn, err := grpc.DialContext(cxt, endpoint, grpc.WithInsecure())
if err != nil {
log.WithField("error", err.Error()).
WithField("endpoint", endpoint).
Errorf("gRPC client can't dial")
cancel()
return nil
}
client := &RpcClient {
OccClient: pb.NewOccClient(conn),
conn: conn,
}
log.WithFields(logrus.Fields{"endpoint": endpoint, "controlMode": controlMode.String()}).Debug("instantiating new transitioner")
client.ctrl = transitioner.NewTransitioner(controlMode, client.doTransition)
return client
}
type RpcClient struct {
pb.OccClient
conn *grpc.ClientConn
ctrl transitioner.Transitioner
}
func (r *RpcClient) Close() error {
return r.conn.Close()
}
func (r *RpcClient) FromDeviceState(state string) string {
return r.ctrl.FromDeviceState(state)
}
func (r *RpcClient) UnmarshalTransition(data []byte) (cmd *ExecutorCommand_Transition, err error) {
cmd = new(ExecutorCommand_Transition)
cmd.rc = r
err = json.Unmarshal(data, cmd)
if err != nil {
cmd = nil
}
return
}
func (r *RpcClient) doTransition(ei transitioner.EventInfo) (newState string, err error) {
log.WithField("event", ei.Evt).Debug("executor<->occplugin interface requesting transition")
var response *pb.TransitionReply
response, err = r.Transition(context.TODO(), &pb.TransitionRequest{
TransitionEvent: ei.Evt,
Arguments: func() (cfg []*pb.ConfigEntry) {
cfg = make([]*pb.ConfigEntry, 0)
if len(ei.Args) == 0 {
return
}
for k, v := range ei.Args {
cfg = append(cfg, &pb.ConfigEntry{Key: k, Value: v})
}
return
}(),
SrcState: ei.Src,
}, grpc.EmptyCallOption{})
log.Debug("response received, about to parse status")
if err != nil {
// We must process the error explicitly here, otherwise we get an error because gRPC's
// Status is different from what gogoproto expects.
status, ok := status.FromError(err)
log.Debug("got status from error")
if ok {
log.WithFields(logrus.Fields{
"code": status.Code().String(),
"message": status.Message(),
"details": status.Details(),
"error": status.Err().Error(),
"ppStatus": pp.Sprint(status),
"ppErr": pp.Sprint(err),
}).
Error("transition call error")
err = errors.New(fmt.Sprintf("occplugin returned %s: %s", status.Code().String(), status.Message()))
} else {
err = errors.New("invalid gRPC status")
log.WithField("error", "invalid gRPC status").Error("transition call error")
}
return
}
if response != nil &&
response.GetOk() &&
response.GetTrigger() == pb.StateChangeTrigger_EXECUTOR &&
response.GetTransitionEvent() == ei.Evt &&
response.GetState() == ei.Dst {
newState = response.GetState()
err = nil
} else if response != nil {
newState = response.GetState()
err = errors.New(fmt.Sprintf("transition unsuccessful: ok: %s, trigger: %s, event: %s, state: %s",
strconv.FormatBool(response.GetOk()),
response.GetTrigger().String(),
response.GetTransitionEvent(),
response.GetState()))
} else {
newState = ""
err = errors.New("transition unsuccessful: invalid response but no gRPC error")
}
return
}