// TODO: returns weft.NotFound when query result is empty?
func dataLatencySummaryProto(r *http.Request, h http.Header, b *bytes.Buffer) *weft.Result {
typeID := r.URL.Query().Get("typeID")
var err error
var rows *sql.Rows
switch typeID {
case "":
rows, err = dbR.Query(`SELECT siteID, typeID, time, mean, fifty, ninety, lower, upper, scale
FROM data.latency_summary
JOIN data.site USING (sitePK)
JOIN data.latency_threshold USING (sitePK, typePK)
JOIN data.type USING (typePK)`)
default:
rows, err = dbR.Query(`SELECT siteID, typeID, time, mean, fifty, ninety, lower, upper, scale
FROM data.latency_summary
JOIN data.site USING (sitePK)
JOIN data.latency_threshold USING (sitePK, typePK)
JOIN data.type USING (typePK)
WHERE typeID = $1;`, typeID)
}
if err != nil {
return weft.InternalServerError(err)
}
defer rows.Close()
var t time.Time
var dlsr mtrpb.DataLatencySummaryResult
for rows.Next() {
var dls mtrpb.DataLatencySummary
if err = rows.Scan(&dls.SiteID, &dls.TypeID, &t, &dls.Mean, &dls.Fifty, &dls.Ninety,
&dls.Lower, &dls.Upper, &dls.Scale); err != nil {
return weft.InternalServerError(err)
}
dls.Seconds = t.Unix()
dlsr.Result = append(dlsr.Result, &dls)
}
rows.Close()
var by []byte
if by, err = proto.Marshal(&dlsr); err != nil {
return weft.InternalServerError(err)
}
b.Write(by)
return &weft.StatusOK
}
func (a *tagSearch) dataLatency() <-chan *weft.Result {
out := make(chan *weft.Result)
go func() {
defer close(out)
var err error
var rows *sql.Rows
if rows, err = dbR.Query(`SELECT siteID, typeID, time, mean, fifty, ninety, lower, upper
FROM data.latency_tag
JOIN data.latency_summary USING (sitePK, typePK)
JOIN data.latency_threshold USING (sitePK, typePK)
JOIN data.site USING (sitePK)
JOIN data.type USING (typePK)
WHERE tagPK = (SELECT tagPK FROM mtr.tag WHERE tag = $1)
OR siteID = $2`, a.tag, a.tag); err != nil {
out <- weft.InternalServerError(err)
return
}
defer rows.Close()
var tm time.Time
for rows.Next() {
var dls mtrpb.DataLatencySummary
if err = rows.Scan(&dls.SiteID, &dls.TypeID, &tm, &dls.Mean, &dls.Fifty, &dls.Ninety,
&dls.Lower, &dls.Upper); err != nil {
out <- weft.InternalServerError(err)
return
}
dls.Seconds = tm.Unix()
a.tagResult.DataLatency = append(a.tagResult.DataLatency, &dls)
}
out <- &weft.StatusOK
return
}()
return out
}
