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service.go
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service.go
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package metathings_component_ext_firmware_service
import (
"context"
"fmt"
"os"
"path/filepath"
"strings"
"sync"
"time"
"github.com/golang/protobuf/ptypes"
"github.com/golang/protobuf/ptypes/any"
"github.com/golang/protobuf/ptypes/empty"
"github.com/sirupsen/logrus"
"github.com/spf13/cast"
"github.com/stretchr/objx"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"github.com/nayotta/metathings/pkg/common/binary_synchronizer"
cfg_helper "github.com/nayotta/metathings/pkg/common/config"
grpc_helper "github.com/nayotta/metathings/pkg/common/grpc"
component "github.com/nayotta/metathings/pkg/component"
)
type ComponentExtFirmwareService struct {
module *component.Module
bs binary_synchronizer.BinarySynchronizer
synchronizing_firmware_mtx sync.Mutex
stats_synchronizing_firmware bool
}
func (svc *ComponentExtFirmwareService) is_synchronizing_firmware() bool {
return svc.stats_synchronizing_firmware
}
func (svc *ComponentExtFirmwareService) HANDLE_GRPC_SyncFirmware(ctx context.Context, in *any.Any) (*any.Any, error) {
var err error
if _, err = svc.SyncFirmware(ctx, &empty.Empty{}); err != nil {
return nil, err
}
out, err := ptypes.MarshalAny(&empty.Empty{})
if err != nil {
return nil, err
}
return out, nil
}
func (svc *ComponentExtFirmwareService) SyncFirmware(ctx context.Context, _ *empty.Empty) (*empty.Empty, error) {
logger := svc.module.Logger()
mdl_name := svc.module.Name()
desc, err := svc.module.Kernel().ShowFirmwareDescriptor()
if err != nil {
logger.WithError(err).Errorf("failed to show firmware descriptor")
return nil, status.Errorf(codes.Internal, err.Error())
}
desc_str, err := grpc_helper.JSONPBMarshaler.MarshalToString(desc.GetDescriptor_())
if err != nil {
logger.WithError(err).Errorf("failed to marshal descriptor to json string")
return nil, status.Errorf(codes.Internal, err.Error())
}
descx, err := objx.FromJSON(desc_str)
if err != nil {
logger.WithError(err).Errorf("failed to marshal json string to objx")
return nil, status.Errorf(codes.Internal, err.Error())
}
mdl_nxt_ver := descx.Get(fmt.Sprintf("modules.%s.version.next", mdl_name)).String()
if mdl_nxt_ver != svc.module.GetVersion() {
uri := descx.Get(fmt.Sprintf("modules.%s.uri.next", mdl_name)).String()
sha256sum := descx.Get(fmt.Sprintf("modules.%s.sha256.next", mdl_name)).String()
go svc.do_sync_firmware(uri, sha256sum)
}
return &empty.Empty{}, nil
}
func (svc *ComponentExtFirmwareService) do_sync_firmware(uri, sha256sum string) error {
logger := svc.module.Logger().WithFields(logrus.Fields{
"uri": uri,
"sha256sum": sha256sum,
})
if svc.is_synchronizing_firmware() {
logger.Warningf("synchronizing firmware, please wait a minutes")
return nil
}
svc.synchronizing_firmware_mtx.Lock()
svc.stats_synchronizing_firmware = true
defer func() {
svc.stats_synchronizing_firmware = false
svc.synchronizing_firmware_mtx.Unlock()
}()
src, err := os.Executable()
if err != nil {
logger.WithError(err).Debugf("failed to get executable info")
return err
}
var postfix string
if len(sha256sum) > 12 {
postfix = sha256sum[:12]
} else {
postfix = fmt.Sprintf("%d", time.Now().Unix())
}
dst := fmt.Sprintf("%v.%v", strings.TrimSuffix(filepath.Base(src), filepath.Ext(src)), postfix)
if err = svc.bs.Sync(svc.module.Kernel().Context(), src, dst, uri, sha256sum); err != nil {
logger.WithError(err).Debugf("failed to sync firmware")
return err
}
logger.Infof("sync firmware, please restart!")
return nil
}
func NewComponentExtFirmwareService(m *component.Module) (*ComponentExtFirmwareService, error) {
cfg := cast.ToStringMap(m.Kernel().Config().Get("binary_synchronizer"))
args := cfg_helper.FlattenConfigOption(cfg, "logger", m.Logger())
bs, err := binary_synchronizer.NewBinarySynchronizer(args...)
if err != nil {
return nil, err
}
srv := &ComponentExtFirmwareService{
module: m,
bs: bs,
stats_synchronizing_firmware: false,
}
return srv, nil
}