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28ee6a8026
* [NOD-381] Publish transaction messages to MQTT * [NOD-381] Remove redundant variable * [NOD-381] Send payload as string * [NOD-381] Add Error handling * [NOD-381] Respond with TransactionResponse * [NOD-381] Use transactionResponse for notifications * [NOD-381] Move code to appropriate places * [NOD-381] Pass raw block instead of txId * [NOD-381] Add comments to public functions * [NOD-381] Remove print statement * [NOD-381] Pass transaction instead of block; Use pointers so default will be nil; * [NOD-381] Use pointers so value could be nil * [NOD-381] Change variable name * [NOD-381] Set QoS to 2 * [NOD-381] Move isConnected to MQTT, so client won't have to worry about it; General code refactors;
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
package mqtt
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import (
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"errors"
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"github.com/daglabs/btcd/apiserver/config"
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mqtt "github.com/eclipse/paho.mqtt.golang"
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)
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// client is an instance of the MQTT client, in case we have an active connection
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var client mqtt.Client
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// GetClient returns an instance of the MQTT client, in case we have an active connection
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func GetClient() (mqtt.Client, error) {
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if client == nil {
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return nil, errors.New("MQTT is not connected")
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}
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return client, nil
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}
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func isConnected() bool {
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return client != nil
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}
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// Connect initiates a connection to the MQTT server, if defined
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func Connect() error {
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cfg := config.ActiveConfig()
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if cfg.MQTTBrokerAddress == "" {
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// MQTT broker not defined -- nothing to do
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return nil
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}
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options := mqtt.NewClientOptions()
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options.AddBroker(cfg.MQTTBrokerAddress)
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options.SetUsername(cfg.MQTTUser)
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options.SetPassword(cfg.MQTTPassword)
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options.SetAutoReconnect(true)
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newClient := mqtt.NewClient(options)
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if token := newClient.Connect(); token.Wait() && token.Error() != nil {
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return token.Error()
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}
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client = newClient
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return nil
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}
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// Close closes the connection to the MQTT server, if previously connected
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func Close() {
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if client == nil {
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return
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}
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client.Disconnect(250)
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client = nil
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}
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