func (m *mongoStore) GetUnitOfTime(uuid common.UUID) (common.UnitOfTime, error) {
item, err := m.uotCache.Fetch(string(uuid), m.cacheExpiry, func() (uot interface{}, err error) {
var (
res interface{}
c int
)
uot = common.UOT_S
query := m.metadata.Find(bson.M{"uuid": uuid}).Select(bson.M{"Properties.UnitofTime": 1})
if c, err = query.Count(); err != nil {
return
} else if c == 0 {
err = fmt.Errorf("no stream named %v", uuid)
return
}
err = query.One(&res)
if props, found := res.(bson.M)["Properties"]; found {
if entry, found := props.(bson.M)["UnitofTime"]; found {
if uotInt, isInt := entry.(int); isInt {
uot = common.UnitOfTime(uotInt)
} else {
err = fmt.Errorf("Invalid UnitOfTime retrieved? %v", entry)
return
}
uot = common.UnitOfTime(entry.(int))
if uot == 0 {
uot = common.UOT_S
}
}
}
return
})
if item != nil && err == nil {
if item.Value().(common.UnitOfTime) == 0 {
return common.UOT_S, err
}
return item.Value().(common.UnitOfTime), err
}
return common.UOT_S, err
}
func (a *Archiver) packStatsResults(params *common.DataParams, readings []common.StatisticalNumbersResponse) common.SmapMessageList {
var result = common.SmapMessageList{}
for _, resp := range readings {
if len(resp.Readings) > 0 {
msg := &common.SmapMessage{UUID: resp.UUID}
for _, rdg := range resp.Readings {
rdg.ConvertTime(common.UnitOfTime(params.ConvertToUnit))
msg.Readings = append(msg.Readings, rdg)
}
// apply data limit if exists
if params.DataLimit > 0 && len(msg.Readings) > params.DataLimit {
msg.Readings = msg.Readings[:params.DataLimit]
}
result = append(result, msg)
}
}
log.Debugf("Returning %d readings", len(result))
return result
}
func getProperties(msg map[string]interface{}) (properties *common.SmapProperties, err error) {
properties = &common.SmapProperties{}
if prop, found := msg["Properties"]; found {
if propmap, ok := prop.(map[string]interface{}); ok {
// UnitofTime
if uot, found := propmap["UnitofTime"]; found {
uotstr, ok := uot.(string)
if !ok {
err = errors.New("UnitofTime was not string")
} else {
var uot common.UnitOfTime
uot, err = common.ParseUOT(uotstr)
properties.UnitOfTime = common.UnitOfTime(uot)
}
}
// UnitofMeasure
if uom, found := propmap["UnitofMeasure"]; found {
uomstr, ok := uom.(string)
if !ok {
err = errors.New("UnitofMeasure was not string")
} else {
properties.UnitOfMeasure = uomstr
}
}
// StreamType
if st, found := propmap["StreamType"]; found {
ststr, ok := st.(string)
if !ok || (ststr != "numeric" && ststr != "object") {
err = errors.New("StreamType was not 'numeric' or 'object'")
} else if ststr == "numeric" {
properties.StreamType = common.NUMERIC_STREAM
} else if ststr == "object" {
properties.StreamType = common.OBJECT_STREAM
}
}
}
return properties, nil
}
return properties, PropertiesNotFound
}