/
openmeter.go
171 lines (137 loc) · 3.46 KB
/
openmeter.go
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package output
import (
"bytes"
"context"
"encoding/json"
"errors"
"io"
"net/http"
"github.com/benthosdev/benthos/v4/public/service"
openmeter "github.com/openmeterio/openmeter/api/client/go"
)
func openmeterOutputConfig() *service.ConfigSpec {
return service.NewConfigSpec().
Beta().
Categories("Services").
Summary("Sends events the OpenMeter ingest API.").
Description("").
Fields(
service.NewURLField("url").
Description("OpenMeter API endpoint"),
service.NewStringField("token").
Description("OpenMeter API token").
Secret().
Optional(),
service.NewBatchPolicyField("batching"),
service.NewOutputMaxInFlightField().Default(10),
)
}
func init() {
err := service.RegisterBatchOutput("openmeter", openmeterOutputConfig(),
func(conf *service.ParsedConfig, mgr *service.Resources) (
output service.BatchOutput,
batchPolicy service.BatchPolicy,
maxInFlight int,
err error,
) {
if maxInFlight, err = conf.FieldInt("max_in_flight"); err != nil {
return
}
if batchPolicy, err = conf.FieldBatchPolicy("batching"); err != nil {
return
}
output, err = newOpenMeterOutput(conf)
return
})
if err != nil {
panic(err)
}
}
type openmeterOutput struct {
client openmeter.ClientWithResponsesInterface
}
func newOpenMeterOutput(conf *service.ParsedConfig) (*openmeterOutput, error) {
url, err := conf.FieldString("url")
if err != nil {
return nil, err
}
// TODO: custom HTTP client
var client openmeter.ClientWithResponsesInterface
if conf.Contains("token") {
token, err := conf.FieldString("token")
if err != nil {
return nil, err
}
client, err = openmeter.NewAuthClientWithResponses(url, token)
if err != nil {
return nil, err
}
} else {
var err error
client, err = openmeter.NewClientWithResponses(url)
if err != nil {
return nil, err
}
}
return &openmeterOutput{
client: client,
}, nil
}
func (out *openmeterOutput) Connect(_ context.Context) error {
return nil
}
// TODO: add schema validation
func (out *openmeterOutput) WriteBatch(ctx context.Context, batch service.MessageBatch) error {
// if there is only one message use the single message endpoint
// otherwise use the batch endpoint
// if validation is enabled, try to parse the message as cloudevents first
//
var contentType string
var body io.Reader
// No need to send a batch if there is only one message
if len(batch) == 1 {
contentType = "application/cloudevents+json"
b, err := batch[0].AsBytes()
if err != nil {
return err
}
body = bytes.NewReader(b)
} else {
contentType = "application/cloudevents-batch+json"
events := make([]any, 0, len(batch))
err := batch.WalkWithBatchedErrors(func(_ int, msg *service.Message) error {
e, err := msg.AsStructured()
if err != nil {
return err
}
events = append(events, e)
return nil
})
if err != nil {
return err
}
var b bytes.Buffer
err = json.NewEncoder(&b).Encode(events)
if err != nil {
return err
}
body = &b
}
resp, err := out.client.IngestEventsWithBodyWithResponse(ctx, contentType, body)
if err != nil {
return err
}
// TODO: improve error handling
if resp.StatusCode() != http.StatusNoContent {
if err := resp.ApplicationproblemJSON400; err != nil {
return err
} else if err := resp.ApplicationproblemJSONDefault; err != nil {
return err
}
return errors.New("unknown error")
}
return nil
}
func (out *openmeterOutput) Close(_ context.Context) error {
return nil
}