90 lines
2.8 KiB
Go
90 lines
2.8 KiB
Go
// Package consumer — чтение shared-SQS → per-tenant PostgreSQL.
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//
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// Роль старого sqs-consumer внутри монолита: long-poll цикл, обработка
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// envelope телеметрии, DeleteMessage после успешной записи (at-least-once).
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package consumer
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import (
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"context"
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"log/slog"
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"time"
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"github.com/aws/aws-sdk-go-v2/aws"
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"github.com/aws/aws-sdk-go-v2/service/sqs"
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"gitea.services.ngcloud.ru/Nail/IoT/internal/service/config"
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"gitea.services.ngcloud.ru/Nail/IoT/internal/service/sqsclient"
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"gitea.services.ngcloud.ru/Nail/IoT/internal/storage/iotpg"
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)
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// errorBackoff — пауза между попытками при ошибках SQS.
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const errorBackoff = 5 * time.Second
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// Run — бесконечный long-poll цикл потребителя.
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func Run(ctx context.Context, cfg *config.Config, sqsClient *sqs.Client, store *iotpg.IoTPostgresStore, log *slog.Logger) error {
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queueURL, err := sqsclient.ResolveQueueURL(ctx, sqsClient, cfg.SQSQueueName)
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if err != nil {
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return err
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}
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log.Info("consumer: SQS queue resolved", "queue", cfg.SQSQueueName)
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for {
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if ctx.Err() != nil {
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break
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}
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resp, err := sqsClient.ReceiveMessage(ctx, &sqs.ReceiveMessageInput{
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QueueUrl: aws.String(queueURL),
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MaxNumberOfMessages: 10,
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WaitTimeSeconds: int32(cfg.SQSLongPollSeconds),
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VisibilityTimeout: int32(cfg.SQSVisibilityTimeout),
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})
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if err != nil {
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if ctx.Err() != nil {
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break
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}
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log.Error("consumer: ReceiveMessage failed", "err", err)
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if !sleepCtx(ctx, errorBackoff) {
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break
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}
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continue
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}
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for _, msg := range resp.Messages {
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if msg.Body == nil {
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continue
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}
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if err := processTelemetry(ctx, *msg.Body, store, log); err != nil {
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log.Error("consumer: process telemetry", "err", err, "message_id", aws.ToString(msg.MessageId))
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// Сообщение вернётся в очередь после visibility timeout.
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continue
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}
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if err := deleteMessage(ctx, sqsClient, queueURL, msg.ReceiptHandle, log); err != nil {
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log.Error("consumer: DeleteMessage failed", "err", err, "message_id", aws.ToString(msg.MessageId))
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}
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}
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}
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log.Info("consumer: shutting down")
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return nil
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}
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// deleteMessage удаляет обработанное сообщение из очереди.
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func deleteMessage(ctx context.Context, client *sqs.Client, queueURL string, receiptHandle *string, log *slog.Logger) error {
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_, err := client.DeleteMessage(ctx, &sqs.DeleteMessageInput{
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QueueUrl: aws.String(queueURL),
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ReceiptHandle: receiptHandle,
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})
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return err
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}
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// sleepCtx — ожидание с прерыванием по ctx. false = ctx завершён.
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func sleepCtx(ctx context.Context, d time.Duration) bool {
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select {
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case <-ctx.Done():
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return false
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case <-time.After(d):
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return true
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}
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}
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