// GetPlots retrieves time series data from origin based on a query and a time interval.
func (c *FacetteConnector) GetPlots(query *plot.Query) ([]*plot.Series, error) {
var results []*plot.Series
// Convert plotQuery into plotRequest-like to forward query to upstream Facette API
plotReq := facettePlotRequest{
Time: query.StartTime,
Range: utils.DurationToRange(query.EndTime.Sub(query.StartTime)),
Sample: query.Sample,
Graph: library.Graph{
Item: library.Item{
Name: "facette",
},
Groups: []*library.OperGroup{
&library.OperGroup{
Name: "group0",
Series: func(series []plot.QuerySeries) []*library.Series {
out := make([]*library.Series, len(series))
for i, s := range series {
out[i] = &library.Series{
Name: fmt.Sprintf("series%d", i),
Origin: s.Origin,
Source: s.Source,
Metric: s.Metric,
}
}
return out
}(query.Series),
},
},
},
}
body, err := json.Marshal(plotReq)
if err != nil {
return nil, fmt.Errorf("facette[%s]: unable to marshal plot request: %s", c.name, err)
}
client := utils.NewHTTPClient(c.timeout, c.insecureTLS)
r, err := http.NewRequest("POST", strings.TrimSuffix(c.upstream, "/")+facetteURLPlots, bytes.NewReader(body))
if err != nil {
return nil, fmt.Errorf("facette[%s]: unable to set up HTTP request: %s", c.name, err)
}
r.Header.Add("Content-Type", "application/json")
r.Header.Add("User-Agent", "Facette")
r.Header.Add("X-Requested-With", "FacetteConnector")
if query.Requestor != "" {
r.Header.Add("X-Facette-Requestor", query.Requestor)
} else {
r.Header.Add("X-Facette-Requestor", c.serverID)
}
rsp, err := client.Do(r)
if err != nil {
return nil, fmt.Errorf("facette[%s]: unable to perform HTTP request: %s", c.name, err)
}
if err := facetteCheckConnectorResponse(rsp); err != nil {
return nil, fmt.Errorf("facette[%s]: invalid upstream HTTP response: %s", c.name, err)
}
data, err := ioutil.ReadAll(rsp.Body)
if err != nil {
return nil, fmt.Errorf("facette[%s]: unable to read HTTP response body: %s", c.name, err)
}
defer rsp.Body.Close()
plotRsp := facettePlotResponse{}
if err := json.Unmarshal(data, &plotRsp); err != nil {
return nil, fmt.Errorf("facette[%s]: unable to unmarshal upstream response: %s", c.name, err)
}
for _, s := range plotRsp.Series {
results = append(results, &plot.Series{
Plots: s.Plots,
Summary: s.Summary,
})
}
return results, nil
}
// GetPlots retrieves time series data from origin based on a query and a time interval.
func (connector *FacetteConnector) GetPlots(query *types.PlotQuery) ([]*types.PlotResult, error) {
// Convert plotQuery into plotRequest-like to forward query to upstream Facette API
plotRequest := facettePlotRequest{
Time: query.StartTime,
Range: utils.DurationToRange(query.EndTime.Sub(query.StartTime)),
Graph: library.Graph{
Item: library.Item{
Name: "facette",
},
Groups: []*library.OperGroup{
&library.OperGroup{
Name: "group0",
Type: query.Group.Type,
Series: func(series []*types.SerieQuery) []*library.Serie {
requestSeries := make([]*library.Serie, len(series))
for index, serie := range series {
requestSeries[index] = &library.Serie{
Name: fmt.Sprintf("serie%d", index),
Origin: serie.Metric.Origin,
Source: serie.Metric.Source,
Metric: serie.Metric.Name,
Scale: serie.Scale,
}
}
return requestSeries
}(query.Group.Series),
Scale: query.Group.Scale,
},
},
},
}
if query.Step != 0 {
plotRequest.Sample = int((query.EndTime.Sub(query.StartTime) / query.Step).Seconds())
}
requestBody, err := json.Marshal(plotRequest)
if err != nil {
return nil, fmt.Errorf("unable to marshal plot request: %s", err)
}
httpTransport := &http.Transport{
Dial: (&net.Dialer{
// Enable dual IPv4/IPv6 stack connectivity:
DualStack: true,
// Enforce HTTP connection timeout:
Timeout: time.Duration(connector.timeout) * time.Second,
}).Dial,
}
httpClient := http.Client{Transport: httpTransport}
request, err := http.NewRequest(
"POST",
strings.TrimSuffix(connector.upstream, "/")+facetteURLLibraryGraphsPlots,
bytes.NewReader(requestBody))
if err != nil {
return nil, fmt.Errorf("unable to set up HTTP request: %s", err)
}
request.Header.Add("Content-Type", "application/json")
request.Header.Add("User-Agent", "Facette")
request.Header.Add("X-Requested-With", "FacetteConnector")
response, err := httpClient.Do(request)
if err != nil {
return nil, fmt.Errorf("unable to perform HTTP request: %s", err)
}
if err := facetteCheckConnectorResponse(response); err != nil {
return nil, fmt.Errorf("invalid upstream HTTP response: %s", err)
}
data, err := ioutil.ReadAll(response.Body)
if err != nil {
return nil, fmt.Errorf("unable to read HTTP response body: %s", err)
}
plotResponse := facettePlotResponse{}
if err := json.Unmarshal(data, &plotResponse); err != nil {
return nil, fmt.Errorf("unable to unmarshal upstream response: %s", err)
}
result := make([]*types.PlotResult, 0)
for _, serie := range plotResponse.Series {
result = append(result, &types.PlotResult{
Plots: serie.Plots,
Info: serie.Info,
})
}
return result, nil
}
