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1c6f124062
* Add disconnect event to mProxy Signed-off-by: Dušan Borovčanin <dusan.borovcanin@mainflux.com> * Rename publishers to pubs Signed-off-by: Dušan Borovčanin <dusan.borovcanin@mainflux.com> * Use acync publishers Signed-off-by: Dušan Borovčanin <dusan.borovcanin@mainflux.com>
40 lines
848 B
Go
40 lines
848 B
Go
// Copyright (c) Mainflux
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// SPDX-License-Identifier: Apache-2.0
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package nats
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import (
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"context"
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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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broker "github.com/nats-io/nats.go"
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)
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const prefix = "channel"
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var _ mainflux.MessagePublisher = (*natsPublisher)(nil)
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type natsPublisher struct {
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nc *broker.Conn
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}
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// NewMessagePublisher instantiates NATS message publisher.
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func NewMessagePublisher(nc *broker.Conn) mainflux.MessagePublisher {
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return &natsPublisher{nc: nc}
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}
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func (pub *natsPublisher) Publish(_ context.Context, _ string, msg mainflux.Message) error {
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data, err := proto.Marshal(&msg)
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if err != nil {
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return err
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}
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subject := fmt.Sprintf("%s.%s", prefix, msg.Channel)
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if msg.Subtopic != "" {
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subject = fmt.Sprintf("%s.%s", subject, msg.Subtopic)
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}
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return pub.nc.Publish(subject, data)
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}
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