forked from open-telemetry/opentelemetry-go-contrib
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Browse files
Browse the repository at this point in the history
* Add a test * Add comments and description options * Another test * Undo buffer re-use * Mod tidy * Precommit * Again * Copyright * Undo rename
- Loading branch information
Showing
3 changed files
with
139 additions
and
30 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| // Copyright The OpenTelemetry Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package prometheus_test | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "net/http" | ||
| "net/http/httptest" | ||
|
|
||
| "go.opentelemetry.io/otel/api/kv" | ||
| "go.opentelemetry.io/otel/api/metric" | ||
| "go.opentelemetry.io/otel/exporters/metric/prometheus" | ||
| sdk "go.opentelemetry.io/otel/sdk/metric" | ||
| integrator "go.opentelemetry.io/otel/sdk/metric/integrator/simple" | ||
| "go.opentelemetry.io/otel/sdk/metric/selector/simple" | ||
| ) | ||
|
|
||
| // This test demonstrates that it is relatively difficult to setup a | ||
| // Prometheus export pipeline: | ||
| // | ||
| // 1. The default boundaries are difficult to pass, should be []float instead of []metric.Number | ||
| // 2. The push controller doesn't make sense b/c Prometheus is pull-bsaed | ||
| // | ||
| // TODO: Address these issues; add Resources to the test. | ||
|
|
||
| func ExampleNewExportPipeline() { | ||
| // Create a meter | ||
| selector := simple.NewWithHistogramDistribution(nil) | ||
| exporter, err := prometheus.NewRawExporter(prometheus.Config{}) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| integrator := integrator.New(selector, true) | ||
| meterImpl := sdk.NewAccumulator(integrator) | ||
| meter := metric.WrapMeterImpl(meterImpl, "example") | ||
|
|
||
| ctx := context.Background() | ||
|
|
||
| // Use two instruments | ||
| counter := metric.Must(meter).NewInt64Counter( | ||
| "a.counter", | ||
| metric.WithDescription("Counts things"), | ||
| ) | ||
| recorder := metric.Must(meter).NewInt64ValueRecorder( | ||
| "a.valuerecorder", | ||
| metric.WithDescription("Records values"), | ||
| ) | ||
|
|
||
| counter.Add(ctx, 100, kv.String("key", "value")) | ||
| recorder.Record(ctx, 100, kv.String("key", "value")) | ||
|
|
||
| // Simulate a push | ||
| meterImpl.Collect(ctx) | ||
| err = exporter.Export(ctx, nil, integrator.CheckpointSet()) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| // GET the HTTP endpoint | ||
| var input bytes.Buffer | ||
| resp := httptest.NewRecorder() | ||
| req, err := http.NewRequest("GET", "/", &input) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| exporter.ServeHTTP(resp, req) | ||
| data, err := ioutil.ReadAll(resp.Result().Body) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| fmt.Print(string(data)) | ||
|
|
||
| // Output: | ||
| // # HELP a_counter Counts things | ||
| // # TYPE a_counter counter | ||
| // a_counter{key="value"} 100 | ||
| // # HELP a_valuerecorder Records values | ||
| // # TYPE a_valuerecorder histogram | ||
| // a_valuerecorder_bucket{key="value",le="+Inf"} 1 | ||
| // a_valuerecorder_sum{key="value"} 100 | ||
| // a_valuerecorder_count{key="value"} 1 | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters