mirror of
https://github.com/jwetzell/showbridge-go.git
synced 2026-04-26 12:55:29 +00:00
123 lines
2.5 KiB
Go
123 lines
2.5 KiB
Go
package module
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import (
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"context"
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"errors"
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"log/slog"
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"github.com/jwetzell/showbridge-go/internal/common"
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"github.com/jwetzell/showbridge-go/internal/config"
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"github.com/jwetzell/showbridge-go/internal/processor"
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"github.com/nats-io/nats.go"
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)
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type NATSClient struct {
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config config.ModuleConfig
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ctx context.Context
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router common.RouteIO
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URL string
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Subject string
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client *nats.Conn
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logger *slog.Logger
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cancel context.CancelFunc
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}
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func init() {
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RegisterModule(ModuleRegistration{
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Type: "nats.client",
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New: func(config config.ModuleConfig) (common.Module, error) {
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params := config.Params
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urlString, err := params.GetString("url")
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if err != nil {
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return nil, errors.New("nats.client url error: " + err.Error())
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}
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subjectString, err := params.GetString("subject")
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if err != nil {
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return nil, errors.New("nats.client subject error: " + err.Error())
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}
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return &NATSClient{config: config, URL: urlString, Subject: subjectString, logger: CreateLogger(config)}, nil
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},
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})
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}
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func (nc *NATSClient) Id() string {
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return nc.config.Id
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}
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func (nc *NATSClient) Type() string {
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return nc.config.Type
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}
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func (nc *NATSClient) Start(ctx context.Context) error {
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nc.logger.Debug("running")
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router, ok := ctx.Value(common.RouterContextKey).(common.RouteIO)
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if !ok {
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return errors.New("nats.client unable to get router from context")
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}
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nc.router = router
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moduleContext, cancel := context.WithCancel(ctx)
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nc.ctx = moduleContext
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nc.cancel = cancel
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client, err := nats.Connect(nc.URL, nats.RetryOnFailedConnect(true))
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if err != nil {
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return err
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}
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nc.client = client
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defer client.Drain()
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defer client.Close()
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sub, err := nc.client.Subscribe(nc.Subject, func(msg *nats.Msg) {
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if nc.router != nil {
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nc.router.HandleInput(nc.ctx, nc.Id(), msg)
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}
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})
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if err != nil {
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return err
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}
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defer sub.Unsubscribe()
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<-nc.ctx.Done()
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nc.logger.Debug("done")
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return nil
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}
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func (nc *NATSClient) Output(ctx context.Context, payload any) error {
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payloadMessage, ok := common.GetAnyAs[processor.NATSMessage](payload)
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if !ok {
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return errors.New("nats.client is only able to output NATSMessage")
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}
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if nc.client == nil {
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return errors.New("nats.client client is not setup")
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}
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if !nc.client.IsConnected() {
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return errors.New("nats.client is not connected")
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}
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err := nc.client.Publish(payloadMessage.Subject, payloadMessage.Payload)
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return err
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}
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func (nc *NATSClient) Stop() {
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nc.cancel()
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}
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func (nc *NATSClient) Get(key string) (any, error) {
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return nil, errors.New("nats.client does not support Get")
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}
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