// ToGraphiteName transforms the given tagged metric back to its graphite metric.
func (rule Rule) ToGraphiteName(taggedMetric api.TaggedMetric) (api.GraphiteMetric, error) {
extractedTagSet := extractTagValues(rule.metricKeyRegex, rule.metricKeyTags, string(taggedMetric.MetricKey))
if extractedTagSet == nil {
// no match found. not a correct rule to interpolate.
return "", newCannotInterpolate(taggedMetric)
}
// Merge the tags in the provided tag set, and tags extracted from the metric.
// This is necessary because tags embedded in the metric are not
// exported to the tagset.
mergedTagSet := taggedMetric.TagSet.Merge(extractedTagSet)
interpolated, err := interpolateTags(rule.raw.Pattern, mergedTagSet, true)
if err != nil {
return "", err
}
return api.GraphiteMetric(interpolated), nil
}
func (a fakeAPI) ToGraphiteName(metric api.TaggedMetric) (api.GraphiteMetric, error) {
return api.GraphiteMetric(metric.MetricKey), nil
}
// Integration test for the query execution.
package query
import (
"errors"
"testing"
"time"
"github.com/square/metrics/api"
"github.com/square/metrics/api/backend"
"github.com/square/metrics/assert"
"github.com/square/metrics/function"
"github.com/square/metrics/mocks"
)
var emptyGraphiteName = api.GraphiteMetric("")
type fakeApiBackend struct{}
func (f fakeApiBackend) FetchSingleSeries(request api.FetchSeriesRequest) (api.Timeseries, error) {
metricMap := map[api.MetricKey][]api.Timeseries{
"series_1": {{[]float64{1, 2, 3, 4, 5}, api.ParseTagSet("dc=west")}},
"series_2": {{[]float64{1, 2, 3, 4, 5}, api.ParseTagSet("dc=west")}, {[]float64{3, 0, 3, 6, 2}, api.ParseTagSet("dc=east")}},
"series_3": {{[]float64{1, 1, 1, 4, 4}, api.ParseTagSet("dc=west")}, {[]float64{5, 5, 5, 2, 2}, api.ParseTagSet("dc=east")}, {[]float64{3, 3, 3, 3, 3}, api.ParseTagSet("dc=north")}},
}
if string(request.Metric.MetricKey) == "series_timeout" {
<-make(chan struct{}) // block forever
}
list, ok := metricMap[request.Metric.MetricKey]
if !ok {
return api.Timeseries{}, errors.New("internal error")
func Test_Blueflood(t *testing.T) {
timerange, err := api.NewTimerange(12000, 13000, 1000)
if err != nil {
t.Fatalf("invalid testcase timerange")
return
}
defaultClientConfig := Config{
"https://blueflood.url",
"square",
make(map[string]int64),
time.Millisecond,
0,
}
// Not really MIN1440, but that's what default TTLs will get with the Timerange we use
defaultQueryUrl := "https://blueflood.url/v2.0/square/views/some.key.graphite?from=12000&resolution=MIN1440&select=numPoints%2Caverage&to=14000"
for _, test := range []struct {
name string
metricMap map[api.GraphiteMetric]api.TaggedMetric
queryMetric api.TaggedMetric
sampleMethod api.SampleMethod
timerange api.Timerange
clientConfig Config
queryUrl string
queryResponse string
queryResponseCode int
queryDelay time.Duration
expectedErrorCode api.BackendErrorCode
expectedSeriesList api.Timeseries
}{
{
name: "Success case",
metricMap: map[api.GraphiteMetric]api.TaggedMetric{
api.GraphiteMetric("some.key.graphite"): api.TaggedMetric{
MetricKey: api.MetricKey("some.key"),
TagSet: api.ParseTagSet("tag=value"),
},
},
queryMetric: api.TaggedMetric{
MetricKey: api.MetricKey("some.key"),
TagSet: api.ParseTagSet("tag=value"),
},
sampleMethod: api.SampleMean,
timerange: timerange,
queryUrl: defaultQueryUrl,
clientConfig: defaultClientConfig,
queryResponse: `{
"unit": "unknown",
"values": [
{
"numPoints": 1,
"timestamp": 12000,
"average": 5
},
{
"numPoints": 1,
"timestamp": 13000,
"average": 3
}
],
"metadata": {
"limit": null,
"next_href": null,
"count": 2,
"marker": null
}
}`,
expectedSeriesList: api.Timeseries{
Values: []float64{5, 3},
TagSet: api.ParseTagSet("tag=value"),
},
},
{
name: "Failure case - invalid JSON",
metricMap: map[api.GraphiteMetric]api.TaggedMetric{
api.GraphiteMetric("some.key.graphite"): api.TaggedMetric{
MetricKey: api.MetricKey("some.key"),
TagSet: api.ParseTagSet("tag=value"),
},
},
queryMetric: api.TaggedMetric{
MetricKey: api.MetricKey("some.key"),
TagSet: api.ParseTagSet("tag=value"),
},
sampleMethod: api.SampleMean,
timerange: timerange,
clientConfig: defaultClientConfig,
queryUrl: defaultQueryUrl,
queryResponse: `{invalid}`,
expectedErrorCode: api.FetchIOError,
},
{
name: "Failure case - HTTP error",
metricMap: map[api.GraphiteMetric]api.TaggedMetric{
api.GraphiteMetric("some.key.graphite"): api.TaggedMetric{
MetricKey: api.MetricKey("some.key"),
TagSet: api.ParseTagSet("tag=value"),
},
},
queryMetric: api.TaggedMetric{
MetricKey: api.MetricKey("some.key"),
TagSet: api.ParseTagSet("tag=value"),
},
sampleMethod: api.SampleMean,
timerange: timerange,
clientConfig: defaultClientConfig,
queryUrl: defaultQueryUrl,
queryResponse: `{}`,
queryResponseCode: 400,
expectedErrorCode: api.FetchIOError,
},
{
name: "Failure case - timeout",
metricMap: map[api.GraphiteMetric]api.TaggedMetric{
api.GraphiteMetric("some.key.graphite"): api.TaggedMetric{
MetricKey: api.MetricKey("some.key"),
TagSet: api.ParseTagSet("tag=value"),
},
},
queryMetric: api.TaggedMetric{
MetricKey: api.MetricKey("some.key"),
TagSet: api.ParseTagSet("tag=value"),
},
sampleMethod: api.SampleMean,
timerange: timerange,
clientConfig: defaultClientConfig,
queryUrl: defaultQueryUrl,
queryResponse: `{}`,
queryDelay: 1 * time.Second,
expectedErrorCode: api.FetchTimeoutError,
},
} {
a := assert.New(t).Contextf("%s", test.name)
fakeApi := mocks.NewFakeApi()
for k, v := range test.metricMap {
fakeApi.AddPair(v, k)
}
fakeHttpClient := mocks.NewFakeHttpClient()
code := test.queryResponseCode
if code == 0 {
code = http.StatusOK
}
fakeHttpClient.SetResponse(test.queryUrl, mocks.Response{test.queryResponse, test.queryDelay, code})
b := NewBlueflood(test.clientConfig).(*blueflood)
b.client = fakeHttpClient
seriesList, err := b.FetchSingleSeries(api.FetchSeriesRequest{
Metric: test.queryMetric,
SampleMethod: test.sampleMethod,
Timerange: test.timerange,
API: fakeApi,
Cancellable: api.NewCancellable(),
})
if test.expectedErrorCode != 0 {
if err == nil {
a.Errorf("Expected error, but was successful.")
continue
}
berr, ok := err.(api.BackendError)
if !ok {
a.Errorf("Failed to cast error to BackendError")
continue
}
a.Eq(berr.Code, test.expectedErrorCode)
} else {
if err != nil {
a.CheckError(err)
continue
}
a.Eq(seriesList, test.expectedSeriesList)
}
}
}
func TestFullResolutionDataFilling(t *testing.T) {
// The queries have to be relative to "now"
defaultClientConfig := Config{
"https://blueflood.url",
"square",
make(map[string]int64),
time.Millisecond,
14400,
}
baseTime := 1438734300000
regularQueryURL := fmt.Sprintf(
"https://blueflood.url/v2.0/square/views/some.key.value?from=%d&resolution=MIN5&select=numPoints%%2Caverage&to=%d",
baseTime-300*1000*10, // 50 minutes ago
baseTime-300*1000*3, // 15 minutes ago
)
regularResponse := fmt.Sprintf(`{
"unit": "unknown",
"values": [
{
"numPoints": 28,
"timestamp": %d,
"average": 100
},
{
"numPoints": 29,
"timestamp": %d,
"average": 142
},
{
"numPoints": 27,
"timestamp": %d,
"average": 138
},
{
"numPoints": 28,
"timestamp": %d,
"average": 182
}
],
"metadata": {
"limit": null,
"next_href": null,
"count": 4,
"marker": null
}
}`,
baseTime-300*1000*10, // 50 minutes ago
baseTime-300*1000*9, // 45 minutes ago
baseTime-300*1000*8, // 40 minutes ago
baseTime-300*1000*7, // 35 minutes ago
)
fullResolutionQueryURL := fmt.Sprintf(
"https://blueflood.url/v2.0/square/views/some.key.value?from=%d&resolution=FULL&select=numPoints%%2Caverage&to=%d",
baseTime-300*1000*10, // 50 minutes ago
baseTime-300*1000*3, // 15 minutes ago
)
fullResolutionResponse := fmt.Sprintf(`{
"unit": "unknown",
"values": [
{
"numPoints": 28,
"timestamp": %d,
"average": 13
},
{
"numPoints": 29,
"timestamp": %d,
"average": 16
},
{
"numPoints": 27,
"timestamp": %d,
"average": 19
},
{
"numPoints": 28,
"timestamp": %d,
"average": 27
}
],
"metadata": {
"limit": null,
"next_href": null,
"count": 4,
"marker": null
}
}`,
baseTime-300*1000*6, // 30m ago
baseTime-300*1000*5+17, // 25m ago with random shuffling
baseTime-300*1000*4+2821, // 20m ago with random shuffling
baseTime-300*1000*3, // 15m ago
)
fakeHttpClient := mocks.NewFakeHttpClient()
fakeHttpClient.SetResponse(regularQueryURL, mocks.Response{regularResponse, 0, http.StatusOK})
fakeHttpClient.SetResponse(fullResolutionQueryURL, mocks.Response{fullResolutionResponse, 0, http.StatusOK})
fakeApi := mocks.NewFakeApi()
fakeApi.AddPair(
api.TaggedMetric{
MetricKey: api.MetricKey("some.key"),
TagSet: api.ParseTagSet("tag=value"),
},
api.GraphiteMetric("some.key.value"),
)
b := NewBlueflood(defaultClientConfig).(*blueflood)
b.client = fakeHttpClient
queryTimerange, err := api.NewSnappedTimerange(
int64(baseTime)-300*1000*10, // 50 minutes ago
int64(baseTime)-300*1000*4, // 20 minutes ago
300*1000, // 5 minute resolution
)
if err != nil {
t.Fatalf("timerange error: %s", err.Error())
}
seriesList, err := b.FetchSingleSeries(api.FetchSeriesRequest{
Metric: api.TaggedMetric{
MetricKey: api.MetricKey("some.key"),
TagSet: api.ParseTagSet("tag=value"),
},
SampleMethod: api.SampleMean,
Timerange: queryTimerange,
API: fakeApi,
Cancellable: api.NewCancellable(),
})
if err != nil {
t.Fatalf("Expected success, but got error: %s", err.Error())
}
expected := []float64{100, 142, 138, 182, 13, 16, 19}
if len(seriesList.Values) != len(expected) {
t.Fatalf("Expected %+v but got %+v", expected, seriesList)
}
for i, expect := range expected {
if seriesList.Values[i] != expect {
t.Fatalf("Expected %+v but got %+v", expected, seriesList)
}
}
}