func dataRequestManagerListen(dr <-chan http_server.DataRequest, opsConfig OpsConfigThreadsafe, toSession towrap.ITrafficOpsSession, localStates peer.CRStatesThreadsafe, peerStates peer.CRStatesPeersThreadsafe, combinedStates peer.CRStatesThreadsafe, statHistory StatHistoryThreadsafe, dsStats DSStatsThreadsafe, events EventsThreadsafe, staticAppData StaticAppData, healthPollInterval time.Duration, lastHealthDurations DurationMapThreadsafe, fetchCount UintThreadsafe, healthIteration UintThreadsafe, errorCount UintThreadsafe, toData todata.TODataThreadsafe, localCacheStatus CacheAvailableStatusThreadsafe, lastKbpsStats StatsLastKbpsThreadsafe) {
for {
select {
case req := <-dr:
defer close(req.Response)
var body []byte
var err error
switch req.Type {
case http_server.TRConfig:
cdnName := opsConfig.Get().CdnName
if toSession == nil {
err = fmt.Errorf("Unable to connect to Traffic Ops")
} else if cdnName == "" {
err = fmt.Errorf("No CDN Configured")
} else {
body, err = toSession.CRConfigRaw(cdnName)
}
if err != nil {
err = fmt.Errorf("TR Config: %v", err)
}
case http_server.TRStateDerived:
body, err = peer.CrstatesMarshall(combinedStates.Get())
if err != nil {
err = fmt.Errorf("TR State (derived): %v", err)
}
case http_server.TRStateSelf:
body, err = peer.CrstatesMarshall(localStates.Get())
if err != nil {
err = fmt.Errorf("TR State (self): %v", err)
}
case http_server.CacheStats:
// TODO: add support for ?hc=N query param, stats=, wildcard, individual caches
// add pp and date to the json:
/*
pp: "0=[my-ats-edge-cache-1], hc=[1]",
date: "Thu Oct 09 20:28:36 UTC 2014"
*/
params := req.Parameters
hc := 1
if _, exists := params["hc"]; exists {
v, err := strconv.Atoi(params["hc"][0])
if err == nil {
hc = v
}
}
body, err = cache.StatsMarshall(statHistory.Get(), hc)
if err != nil {
err = fmt.Errorf("CacheStats: %v", err)
}
case http_server.DSStats:
body, err = json.Marshal(ds.StatsJSON(dsStats.Get())) // TODO marshall beforehand, for performance? (test to see how often requests are made)
if err != nil {
err = fmt.Errorf("DsStats: %v", err)
}
case http_server.EventLog:
body, err = json.Marshal(JSONEvents{Events: events.Get()})
if err != nil {
err = fmt.Errorf("EventLog: %v", err)
}
case http_server.PeerStates:
body, err = json.Marshal(createApiPeerStates(peerStates.Get()))
case http_server.StatSummary:
body = []byte("TODO implement")
case http_server.Stats:
body, err = getStats(staticAppData, healthPollInterval, lastHealthDurations.Get(), fetchCount.Get(), healthIteration.Get(), errorCount.Get())
if err != nil {
err = fmt.Errorf("Stats: %v", err)
}
case http_server.ConfigDoc:
opsConfigCopy := opsConfig.Get()
// if the password is blank, leave it blank, so callers can see it's missing.
if opsConfigCopy.Password != "" {
opsConfigCopy.Password = "******"
}
body, err = json.Marshal(opsConfigCopy)
if err != nil {
err = fmt.Errorf("Config Doc: %v", err)
}
case http_server.APICacheCount: // TODO determine if this should use peerStates
body = []byte(strconv.Itoa(len(localStates.Get().Caches)))
case http_server.APICacheAvailableCount:
body = []byte(strconv.Itoa(cacheAvailableCount(localStates.Get().Caches)))
case http_server.APICacheDownCount:
body = []byte(strconv.Itoa(cacheDownCount(localStates.Get().Caches)))
case http_server.APIVersion:
s := "traffic_monitor-" + staticAppData.Version + "."
if len(staticAppData.GitRevision) > 6 {
s += staticAppData.GitRevision[:6]
} else {
s += staticAppData.GitRevision
}
body = []byte(s)
case http_server.APITrafficOpsURI:
body = []byte(opsConfig.Get().Url)
case http_server.APICacheStates:
body, err = json.Marshal(createCacheStatuses(toData.Get().ServerTypes, statHistory.Get(), lastHealthDurations.Get(), localStates.Get().Caches, lastKbpsStats.Get(), localCacheStatus))
case http_server.APIBandwidthKbps:
serverTypes := toData.Get().ServerTypes
kbpsStats := lastKbpsStats.Get()
sum := float64(0.0)
for cache, data := range kbpsStats.Caches {
if serverTypes[cache] != enum.CacheTypeEdge {
continue
}
sum += data.Kbps
}
body = []byte(fmt.Sprintf("%f", sum))
default:
err = fmt.Errorf("Unknown Request Type: %v", req.Type)
}
if err != nil {
errorCount.Inc()
log.Errorf("Request Error: %v\n", err)
} else {
req.Response <- body
}
}
}
}
// DataRequest takes an `http_server.DataRequest`, and the monitored data objects, and returns the appropriate response, and the status code.
func DataRequest(
req http_server.DataRequest,
opsConfig OpsConfigThreadsafe,
toSession towrap.ITrafficOpsSession,
localStates peer.CRStatesThreadsafe,
peerStates peer.CRStatesPeersThreadsafe,
combinedStates peer.CRStatesThreadsafe,
statHistory StatHistoryThreadsafe,
dsStats DSStatsThreadsafe,
events EventsThreadsafe,
staticAppData StaticAppData,
healthPollInterval time.Duration,
lastHealthDurations DurationMapThreadsafe,
fetchCount UintThreadsafe,
healthIteration UintThreadsafe,
errorCount UintThreadsafe,
toData todata.TODataThreadsafe,
localCacheStatus CacheAvailableStatusThreadsafe,
lastStats LastStatsThreadsafe,
unpolledCaches UnpolledCachesThreadsafe,
) (body []byte, responseCode int) {
// handleErr takes an error, and the request type it came from, and logs. It is ok to call with a nil error, in which case this is a no-op.
handleErr := func(err error) {
if err == nil {
return
}
errorCount.Inc()
log.Errorf("Request Error: %v\n", fmt.Errorf(req.Type.String()+": %v", err))
}
// commonReturn takes the body, err, and the data request Type which has been processed. It logs and deals with any error, and returns the appropriate bytes and response code for the `http_server`.
commonReturn := func(body []byte, err error) ([]byte, int) {
if err == nil {
return body, http.StatusOK
}
handleErr(err)
return nil, http.StatusInternalServerError
}
if unpolledCaches.Any() {
handleErr(fmt.Errorf("service still starting, some caches unpolled"))
return []byte("Service Unavailable"), http.StatusServiceUnavailable
}
var err error
switch req.Type {
case http_server.TRConfig:
cdnName := opsConfig.Get().CdnName
if toSession == nil {
return commonReturn(nil, fmt.Errorf("Unable to connect to Traffic Ops"))
}
if cdnName == "" {
return commonReturn(nil, fmt.Errorf("No CDN Configured"))
}
return commonReturn(body, err)
case http_server.TRStateDerived:
body, err = peer.CrstatesMarshall(combinedStates.Get())
return commonReturn(body, err)
case http_server.TRStateSelf:
body, err = peer.CrstatesMarshall(localStates.Get())
return commonReturn(body, err)
case http_server.CacheStats:
filter, err := NewCacheStatFilter(req.Parameters, toData.Get().ServerTypes)
if err != nil {
handleErr(err)
return []byte(err.Error()), http.StatusBadRequest
}
body, err = cache.StatsMarshall(statHistory.Get(), filter, req.Parameters)
return commonReturn(body, err)
case http_server.DSStats:
filter, err := NewDSStatFilter(req.Parameters, toData.Get().DeliveryServiceTypes)
if err != nil {
handleErr(err)
return []byte(err.Error()), http.StatusBadRequest
}
body, err = json.Marshal(dsStats.Get().JSON(filter, req.Parameters)) // TODO marshall beforehand, for performance? (test to see how often requests are made)
return commonReturn(body, err)
case http_server.EventLog:
body, err = json.Marshal(JSONEvents{Events: events.Get()})
return commonReturn(body, err)
case http_server.PeerStates:
filter, err := NewPeerStateFilter(req.Parameters, toData.Get().ServerTypes)
if err != nil {
handleErr(err)
return []byte(err.Error()), http.StatusBadRequest
}
body, err = json.Marshal(createApiPeerStates(peerStates.Get(), filter, req.Parameters))
return commonReturn(body, err)
case http_server.StatSummary:
return nil, http.StatusNotImplemented
case http_server.Stats:
body, err = getStats(staticAppData, healthPollInterval, lastHealthDurations.Get(), fetchCount.Get(), healthIteration.Get(), errorCount.Get())
return commonReturn(body, err)
case http_server.ConfigDoc:
opsConfigCopy := opsConfig.Get()
// if the password is blank, leave it blank, so callers can see it's missing.
if opsConfigCopy.Password != "" {
opsConfigCopy.Password = "******"
}
body, err = json.Marshal(opsConfigCopy)
return commonReturn(body, err)
case http_server.APICacheCount: // TODO determine if this should use peerStates
return []byte(strconv.Itoa(len(localStates.Get().Caches))), http.StatusOK
case http_server.APICacheAvailableCount:
return []byte(strconv.Itoa(cacheAvailableCount(localStates.Get().Caches))), http.StatusOK
case http_server.APICacheDownCount:
return []byte(strconv.Itoa(cacheDownCount(localStates.Get().Caches))), http.StatusOK
case http_server.APIVersion:
s := "traffic_monitor-" + staticAppData.Version + "."
if len(staticAppData.GitRevision) > 6 {
s += staticAppData.GitRevision[:6]
} else {
s += staticAppData.GitRevision
}
return []byte(s), http.StatusOK
case http_server.APITrafficOpsURI:
return []byte(opsConfig.Get().Url), http.StatusOK
case http_server.APICacheStates:
body, err = json.Marshal(createCacheStatuses(toData.Get().ServerTypes, statHistory.Get(),
lastHealthDurations.Get(), localStates.Get().Caches, lastStats.Get(), localCacheStatus))
return commonReturn(body, err)
case http_server.APIBandwidthKbps:
serverTypes := toData.Get().ServerTypes
kbpsStats := lastStats.Get()
sum := float64(0.0)
for cache, data := range kbpsStats.Caches {
if serverTypes[cache] != enum.CacheTypeEdge {
continue
}
sum += data.Bytes.PerSec / ds.BytesPerKilobit
}
return []byte(fmt.Sprintf("%f", sum)), http.StatusOK
case http_server.APIBandwidthCapacityKbps:
statHistory := statHistory.Get()
cap := int64(0)
for _, results := range statHistory {
if len(results) == 0 {
continue
}
cap += results[0].MaxKbps
}
return []byte(fmt.Sprintf("%d", cap)), http.StatusOK
default:
return commonReturn(nil, fmt.Errorf("Unknown Request Type"))
}
}