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ssm.go
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ssm.go
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package ssm
import (
"context"
"errors"
"github.com/alexfalkowski/go-service/marshaller"
"github.com/alexfalkowski/go-service/telemetry/tracer"
"github.com/aws/aws-sdk-go-v2/service/ssm"
"github.com/aws/aws-sdk-go-v2/service/ssm/types"
"go.opentelemetry.io/otel/trace"
)
var errMissing = errors.New("missing value")
// Secret from SSM.
type Secret struct {
Data map[string]any `json:"data"`
}
// Transformer for SSM.
type Transformer struct {
client *ssm.Client
json *marshaller.JSON
tracer trace.Tracer
}
// NewTransformer for SSM.
func NewTransformer(client *ssm.Client, json *marshaller.JSON, tracer trace.Tracer) *Transformer {
return &Transformer{client: client, json: json, tracer: tracer}
}
// Transform for SSM.
func (t *Transformer) Transform(ctx context.Context, value string) (any, error) {
ctx, span := t.tracer.Start(ctx, operationName("transform"), trace.WithSpanKind(trace.SpanKindClient))
defer span.End()
ctx = tracer.WithTraceID(ctx, span)
tracer.Meta(ctx, span)
out, err := t.client.GetParameter(ctx, &ssm.GetParameterInput{Name: &value})
if err != nil {
var perr *types.ParameterNotFound
if errors.As(err, &perr) {
return value, errMissing
}
tracer.Error(err, span)
return value, err
}
var sec Secret
if err := t.json.Unmarshal([]byte(*out.Parameter.Value), &sec); err != nil {
tracer.Error(err, span)
return value, err
}
v := sec.Data["value"]
if v == nil {
return value, errMissing
}
return v, nil
}
// IsMissing value for SSM.
func (t *Transformer) IsMissing(err error) bool {
return errors.Is(err, errMissing)
}
func operationName(name string) string {
return tracer.OperationName("ssm", name)
}