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Add SignalR for environment service

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Chris Kaczor
2024-01-13 22:30:06 -05:00
parent aab20263ad
commit bdc5548ec2
4 changed files with 39 additions and 3 deletions
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34
Environment/Service/MessageHandler.cs
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@@ -2,6 +2,8 @@
using ChrisKaczor.HomeMonitor.Environment.Service.Data;
using MQTTnet;
using MQTTnet.Client;
using Microsoft.AspNetCore.SignalR.Client;
using System.Threading;
namespace ChrisKaczor.HomeMonitor.Environment.Service;
@@ -10,6 +12,7 @@ public class MessageHandler : IHostedService
private readonly IConfiguration _configuration;
private readonly Database _database;
private readonly IMqttClient _mqttClient;
private HubConnection _hubConnection;
private readonly MqttFactory _mqttFactory;
private readonly string _topic;
@@ -30,20 +33,26 @@ public class MessageHandler : IHostedService
_mqttClient = _mqttFactory.CreateMqttClient();
_mqttClient.ApplicationMessageReceivedAsync += OnApplicationMessageReceivedAsync;
_hubConnection = new HubConnectionBuilder().WithUrl(configuration["Environment:Hub:Url"] ?? string.Empty).Build();
}
public async Task StartAsync(CancellationToken cancellationToken)
{
await _hubConnection.StartAsync(cancellationToken);
var mqttClientOptions = new MqttClientOptionsBuilder().WithTcpServer(_configuration["Mqtt:Server"]).Build();
await _mqttClient.ConnectAsync(mqttClientOptions, CancellationToken.None);
await _mqttClient.ConnectAsync(mqttClientOptions, cancellationToken);
var mqttSubscribeOptions = _mqttFactory.CreateSubscribeOptionsBuilder().WithTopicFilter($"{_topic}/#").Build();
await _mqttClient.SubscribeAsync(mqttSubscribeOptions, CancellationToken.None);
await _mqttClient.SubscribeAsync(mqttSubscribeOptions, cancellationToken);
}
public async Task StopAsync(CancellationToken cancellationToken)
{
await _mqttClient.DisconnectAsync(new MqttClientDisconnectOptionsBuilder().Build(), CancellationToken.None);
await _mqttClient.DisconnectAsync(new MqttClientDisconnectOptionsBuilder().Build(), cancellationToken);
await _hubConnection.StopAsync(cancellationToken);
}
private async Task OnApplicationMessageReceivedAsync(MqttApplicationMessageReceivedEventArgs arg)
@@ -59,6 +68,25 @@ public class MessageHandler : IHostedService
return;
await _database.StoreMessageAsync(message);
await SendLatestReading(message);
}
private async Task SendLatestReading(Message message)
{
try
{
if (_hubConnection.State == HubConnectionState.Disconnected)
await _hubConnection.StartAsync();
var json = JsonSerializer.Serialize(message);
await _hubConnection.InvokeAsync("SendLatestReading", json);
}
catch (Exception exception)
{
WriteLog($"Hub exception: {exception}");
}
}
private static void WriteLog(string message)