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Added IMqttRetainedMessagesManager

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* Added interface IMqttRetainedMessagesManager to allow for different
retained messages manager implementations. The interface copies almost
exactly the current MqttRetainedMessagesManager implementation.

* Added IMqttRetainedMessagesManager.Start() to configure the provided
IMqttRetainedMessagesManager outside the constructor. This method returns
Task because some implementations that use external storage may be slow on
initialization (e.g., connect to a database).

* Modified MqttRetainedMessagesManager to implement new interface.
This commit is contained in:
Federico Di Gregorio
2019-12-17 11:57:17 +01:00
parent 624fafc662
commit f949d54aef
9 changed files with 64 additions and 33 deletions
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Source/MQTTnet/Server/MqttServer.cs
+7 -6
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@@ -19,7 +19,7 @@ namespace MQTTnet.Server
private readonly IMqttNetChildLogger _logger;
private MqttClientSessionsManager _clientSessionsManager;
private MqttRetainedMessagesManager _retainedMessagesManager;
private IMqttRetainedMessagesManager _retainedMessagesManager;
private CancellationTokenSource _cancellationTokenSource;
public MqttServer(IEnumerable<IMqttServerAdapter> adapters, IMqttNetChildLogger logger)
@@ -48,7 +48,7 @@ namespace MQTTnet.Server
get => _eventDispatcher.ClientDisconnectedHandler;
set => _eventDispatcher.ClientDisconnectedHandler = value;
}
public IMqttServerClientSubscribedTopicHandler ClientSubscribedTopicHandler
{
get => _eventDispatcher.ClientSubscribedTopicHandler;
@@ -60,7 +60,7 @@ namespace MQTTnet.Server
get => _eventDispatcher.ClientUnsubscribedTopicHandler;
set => _eventDispatcher.ClientUnsubscribedTopicHandler = value;
}
public IMqttApplicationMessageReceivedHandler ApplicationMessageReceivedHandler
{
get => _eventDispatcher.ApplicationMessageReceivedHandler;
@@ -121,7 +121,8 @@ namespace MQTTnet.Server
_cancellationTokenSource = new CancellationTokenSource();
_retainedMessagesManager = new MqttRetainedMessagesManager(Options, _logger);
_retainedMessagesManager = Options.RetainedMessagesManager ?? new MqttRetainedMessagesManager();
await _retainedMessagesManager.Start(Options, _logger);
await _retainedMessagesManager.LoadMessagesAsync().ConfigureAwait(false);
_clientSessionsManager = new MqttClientSessionsManager(Options, _retainedMessagesManager, _cancellationTokenSource.Token, _eventDispatcher, _logger);
@@ -150,9 +151,9 @@ namespace MQTTnet.Server
{
return;
}
await _clientSessionsManager.StopAsync().ConfigureAwait(false);
_cancellationTokenSource.Cancel(false);
foreach (var adapter in _adapters)