mirror of
https://github.com/mainflux/mainflux.git
synced 2025-04-27 13:48:49 +08:00
50 lines
1008 B
Go
50 lines
1008 B
Go
//
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// Copyright (c) 2018
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// Mainflux
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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package writers
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import (
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"fmt"
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"github.com/gogo/protobuf/proto"
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"github.com/mainflux/mainflux"
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log "github.com/mainflux/mainflux/logger"
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nats "github.com/nats-io/go-nats"
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)
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type consumer struct {
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nc *nats.Conn
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logger log.Logger
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repo MessageRepository
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}
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// Start method starts to consume normalized messages received from NATS.
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func Start(nc *nats.Conn, repo MessageRepository, queue string, logger log.Logger) error {
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c := consumer{
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nc: nc,
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logger: logger,
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repo: repo,
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}
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_, err := nc.QueueSubscribe(mainflux.OutputSenML, queue, c.consume)
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return err
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}
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func (c *consumer) consume(m *nats.Msg) {
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msg := &mainflux.Message{}
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if err := proto.Unmarshal(m.Data, msg); err != nil {
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c.logger.Warn(fmt.Sprintf("Failed to unmarshal received message: %s", err))
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return
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}
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if err := c.repo.Save(*msg); err != nil {
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c.logger.Warn(fmt.Sprintf("Failed to save message: %s", err))
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return
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}
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}
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