func (bwh *BOSSWaveHandler) listenQueries(msg *bw.SimpleMessage) {
var (
// the publisher of the message. We incorporate this into the signal URI
fromVK string
// the computed signal based on the VK and query nonce
signalURI string
// query message
query KeyValueQuery
)
fromVK = msg.From
po := msg.GetOnePODF(GilesKeyValueQueryPIDString)
if po == nil { // no query found
return
}
if obj, ok := po.(bw.MsgPackPayloadObject); !ok {
log.Error("Received query was not msgpack")
} else if err := obj.ValueInto(&query); err != nil {
log.Error(errors.Wrap(err, "Could not unmarshal received query"))
return
}
signalURI = fmt.Sprintf("%s,queries", fromVK[:len(fromVK)-1])
log.Infof("Got query %+v", query)
res, err := bwh.a.HandleQuery(query.Query)
if err != nil {
msg := QueryError{
Query: query.Query,
Nonce: query.Nonce,
Error: err.Error(),
}
po, _ := bw.CreateMsgPackPayloadObject(GilesQueryErrorPID, msg)
log.Error(errors.Wrap(err, "Error evaluating query"))
if err := bwh.iface.PublishSignal(signalURI, po); err != nil {
log.Error(errors.Wrap(err, "Error sending response"))
}
}
var reply []bw.PayloadObject
switch t := res.(type) {
case common.SmapMessageList:
log.Debug("smap messages list")
pos := POsFromSmapMessageList(query.Nonce, t)
reply = append(reply, pos...)
case common.DistinctResult:
log.Debug("distinct list")
reply = append(reply, POFromDistinctResult(query.Nonce, t))
default:
log.Debug("type %T", res)
}
log.Debugf("Reply on %s: %d", bwh.iface.SignalURI(signalURI), len(reply))
if err := bwh.iface.PublishSignal(signalURI, reply...); err != nil {
log.Error(errors.Wrap(err, "Error sending response"))
}
}
func (msg QueryTimeseriesResult) ToMsgPackBW() (po bw.PayloadObject) {
po, _ = bw.CreateMsgPackPayloadObject(GilesQueryTimeseriesResultPID, msg)
return
}
func (msg KeyValueQuery) ToMsgPackBW() (po bw.PayloadObject) {
po, _ = bw.CreateMsgPackPayloadObject(GilesKeyValueQueryPID, msg)
return
}
func (msg QueryError) ToMsgPackBW() (po bw.PayloadObject) {
po, _ = bw.CreateMsgPackPayloadObject(GilesQueryErrorPID, msg)
return
}
func (msg Statistics) ToMsgPackBW() (po bw.PayloadObject) {
po, _ = bw.CreateMsgPackPayloadObject(GilesTimeseriesPID, msg)
return
}