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main.go
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main.go
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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package main
import (
"context"
"fmt"
"github.com/aws/aws-lambda-go/lambda"
"github.com/hashicorp/go-multierror"
"github.com/mitchellh/mapstructure"
)
func main() {
lambda.Start(HandleRequest)
}
func HandleRequest(ctx context.Context, rawEvent map[string]interface{}) (string, error) {
env, err := SetupEnvironment(ctx)
if err != nil {
// We can't use the logger because of the error.
fmt.Println("Error setting up the environment: %w", err)
return "", fmt.Errorf("setting up consul environment: %w", err)
}
events, err := GetEvents(ctx, env, rawEvent)
if err != nil {
env.Logger.Warn("Error getting events", "error", err)
return "", fmt.Errorf("error getting events: %w", err)
}
env.Logger.Info("Processing events", "count", len(events))
var resultErr error
for _, event := range events {
err := event.Reconcile(env)
if err != nil {
env.Logger.Warn("Error reconciling event", "error", err, "identifier", event.Identifier())
resultErr = multierror.Append(resultErr, err)
}
}
return "", resultErr
}
type Event interface {
Reconcile(Environment) error
Identifier() string
}
func GetEvents(ctx context.Context, env Environment, data map[string]interface{}) ([]Event, error) {
source, ok := data["source"].(string)
if !ok {
return nil, fmt.Errorf("missing event source")
}
env.Logger.Info("Received event", "source", source)
switch source {
case "aws.events":
return env.FullSyncData(ctx)
case "aws.lambda":
var e AWSEvent
err := mapstructure.Decode(data, &e)
if err != nil {
return nil, fmt.Errorf("error decoding aws.lambda event %s", err)
}
if e.Detail.ErrorCode != "" {
env.Logger.Info("Unprocessable event",
"errorCode", e.Detail.ErrorCode,
"eventID", e.Detail.EventID,
"eventName", e.Detail.EventName)
return nil, nil
}
events, err := env.AWSEventToEvents(ctx, e)
if err != nil {
return nil, fmt.Errorf("error converting aws.lambda event our event %s", err)
}
return events, nil
}
return nil, fmt.Errorf("unprocessable event source %q", source)
}