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This implementation is similar to AMQP notifications: * Notifications are published on a single topic as a JSON feed * Topic is configurable, as is the QoS. Uses the paho.mqtt.golang library for the mqtt connection, and supports connections over tcp and websockets, with optional secure tls support. * Additionally the minio server configuration has been bumped up so mqtt configuration can be added. * Configuration migration code is added with tests. MQTT is an ISO standard M2M/IoT messaging protocol and was originally designed for applications for limited bandwidth networks. Today it's use is growing in the IoT space.
105 lines
2.1 KiB
Go
105 lines
2.1 KiB
Go
/*
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* Copyright (c) 2013 IBM Corp.
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*
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* Seth Hoenig
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* Allan Stockdill-Mander
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* Mike Robertson
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*/
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package mqtt
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import (
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"github.com/eclipse/paho.mqtt.golang/packets"
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)
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// Message defines the externals that a message implementation must support
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// these are received messages that are passed to the callbacks, not internal
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// messages
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type Message interface {
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Duplicate() bool
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Qos() byte
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Retained() bool
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Topic() string
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MessageID() uint16
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Payload() []byte
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}
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type message struct {
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duplicate bool
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qos byte
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retained bool
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topic string
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messageID uint16
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payload []byte
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}
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func (m *message) Duplicate() bool {
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return m.duplicate
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}
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func (m *message) Qos() byte {
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return m.qos
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}
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func (m *message) Retained() bool {
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return m.retained
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}
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func (m *message) Topic() string {
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return m.topic
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}
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func (m *message) MessageID() uint16 {
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return m.messageID
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}
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func (m *message) Payload() []byte {
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return m.payload
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}
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func messageFromPublish(p *packets.PublishPacket) Message {
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return &message{
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duplicate: p.Dup,
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qos: p.Qos,
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retained: p.Retain,
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topic: p.TopicName,
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messageID: p.MessageID,
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payload: p.Payload,
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}
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}
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func newConnectMsgFromOptions(options *ClientOptions) *packets.ConnectPacket {
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m := packets.NewControlPacket(packets.Connect).(*packets.ConnectPacket)
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m.CleanSession = options.CleanSession
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m.WillFlag = options.WillEnabled
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m.WillRetain = options.WillRetained
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m.ClientIdentifier = options.ClientID
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if options.WillEnabled {
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m.WillQos = options.WillQos
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m.WillTopic = options.WillTopic
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m.WillMessage = options.WillPayload
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}
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if options.Username != "" {
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m.UsernameFlag = true
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m.Username = options.Username
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//mustn't have password without user as well
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if options.Password != "" {
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m.PasswordFlag = true
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m.Password = []byte(options.Password)
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}
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}
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m.Keepalive = uint16(options.KeepAlive.Seconds())
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return m
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}
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