Michael McGuinness
110 lines
2.3 KiB
Go
110 lines
2.3 KiB
Go
package runner
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"log/slog"
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"queryorchestration/internal/serviceconfig/queue"
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"github.com/aws/aws-sdk-go-v2/service/sqs/types"
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)
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type Server[B any] struct {
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cleanup func() error
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cfg ConfigProvider[B]
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}
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func (c *Server[B]) Listen(ctx context.Context) {
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slog.Info("Listening to queue")
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defer func() {
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if err := c.cleanup(); err != nil {
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fmt.Printf("Error during cleanup: %v", err)
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}
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}()
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for {
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select {
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case <-ctx.Done():
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return
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default:
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err := c.pollMessage(ctx)
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if err != nil {
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slog.Error(err.Error())
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}
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}
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}
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}
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func (c *Server[B]) pollMessage(ctx context.Context) error {
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result, err := c.cfg.ReceiveFromQueue(ctx, &queue.ReceiveParams{
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QueueURL: c.cfg.GetQueueURL(),
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})
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if err != nil {
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return fmt.Errorf("message fetch fail: %w", err)
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}
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for _, message := range result.Messages {
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err := c.processMessage(ctx, &message)
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if err != nil {
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slog.Error("message process fail", "id", *message.MessageId, "err", err)
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}
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}
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return nil
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}
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func (c *Server[B]) processMessage(ctx context.Context, message *types.Message) error {
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body := c.processBody(message)
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if body == nil {
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return nil
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}
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slog.Debug("processing message", "id", *message.MessageId, "body", *message.Body)
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isProcessed := c.cfg.GetController().Process(ctx, *body)
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if !isProcessed {
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return errors.New("message process fail")
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}
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err := c.cfg.DeleteFromQueue(ctx, &queue.DeleteParams{
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QueueURL: c.cfg.GetQueueURL(),
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ReceiptHandle: message.ReceiptHandle,
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})
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if err != nil {
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return fmt.Errorf("message delete fail: %w", err)
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}
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return nil
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}
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func (c *Server[B]) processBody(message *types.Message) *B {
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if message == nil {
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slog.Error("nil message")
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return nil
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} else if message.MessageId == nil {
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slog.Error("nil message id")
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return nil
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} else if message.Body == nil {
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slog.Error("nil body", "messageId", *message.MessageId)
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return nil
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}
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var body B
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err := json.Unmarshal([]byte(*message.Body), &body)
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if err != nil {
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slog.Error("parsing body", "messageId", *message.MessageId, "body", *message.Body)
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return nil
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}
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err = c.cfg.GetValidator().Struct(body)
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if err != nil {
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slog.Error("invalid body", "messageId", *message.MessageId, "error", err)
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return nil
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}
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return &body
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}
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