Created
April 2, 2020 15:39
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testing appinsights for fs .env scoping. helped identify issue with scheduled task invocation, might be an otherwise useful snippet.
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| package main | |
| import ( | |
| "fmt" | |
| "os" | |
| "path/filepath" | |
| "time" | |
| "github.com/joho/godotenv" | |
| "github.com/microsoft/ApplicationInsights-Go/appinsights" | |
| ) | |
| const ( | |
| envinsightskey = "ikey" | |
| envfile = ".env" | |
| ) | |
| var ( | |
| insightsClient appinsights.TelemetryClient | |
| ) | |
| func init() { | |
| var ( | |
| keyProvided bool | |
| instrumentationKey string | |
| ) | |
| if err := godotenv.Load(envfile); err != nil { | |
| dir, _ := os.Getwd() | |
| panic(fmt.Errorf("provide envfile in %s%s%s", dir, string(filepath.Separator), envfile)) | |
| } | |
| if instrumentationKey, keyProvided = os.LookupEnv(envinsightskey); keyProvided == false { | |
| panic(fmt.Errorf("provide value for key=%q in envfile", envinsightskey)) | |
| } else { | |
| insightsClient = appinsights.NewTelemetryClientFromConfig( | |
| appinsights.NewTelemetryConfiguration(instrumentationKey), | |
| ) | |
| appinsights.NewDiagnosticsMessageListener(func(msg string) error { | |
| fmt.Printf("[%s] %s\n", time.Now().Format(time.UnixDate), msg) | |
| return nil | |
| }) | |
| } | |
| } | |
| func main() { | |
| var event = func() string { | |
| host, _ := os.Hostname() | |
| return fmt.Sprintf("testing on %s.", host) | |
| } | |
| insightsClient.TrackEvent(event()) | |
| select { | |
| case <-insightsClient.Channel().Close(10 * time.Second): | |
| // Ten second timeout for retries. | |
| os.Exit(0) | |
| // If we got here, then all telemetry was submitted | |
| // successfully, and we can proceed to exiting. | |
| case <-time.After(30 * time.Second): | |
| // Thirty second absolute timeout. This covers any | |
| // previous telemetry submission that may not have | |
| // completed before Close was called. | |
| os.Exit(1) | |
| // There are a number of reasons we could have | |
| // reached here. We gave it a go, but telemetry | |
| // submission failed somewhere. Perhaps old events | |
| // were still retrying, or perhaps we're throttled. | |
| // Either way, we don't want to wait around for it | |
| // to complete, so let's just exit. | |
| } | |
| //ref for select above: https://github.com/microsoft/ApplicationInsights-Go#shutdown | |
| } |
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