public async Task MqttServer_LotsOfRetainedMessages()
{
const int ClientCount = 100;
var server = new MqttFactory().CreateMqttServer();
try
{
await server.StartAsync(new MqttServerOptionsBuilder().Build());
Parallel.For(
0,
ClientCount,
new ParallelOptions {
MaxDegreeOfParallelism = 10
},
i =>
{
using (var client = new MqttFactory().CreateMqttClient())
{
client.ConnectAsync(new MqttClientOptionsBuilder().WithTcpServer("localhost").Build())
.GetAwaiter().GetResult();
for (var j = 0; j < 10; j++)
{
// Clear retained message.
client.PublishAsync(new MqttApplicationMessageBuilder().WithTopic("r" + i)
.WithPayload(new byte[0]).WithRetainFlag().Build()).GetAwaiter().GetResult();
// Set retained message.
client.PublishAsync(new MqttApplicationMessageBuilder().WithTopic("r" + i)
.WithPayload("value" + j).WithRetainFlag().Build()).GetAwaiter().GetResult();
}
client.DisconnectAsync().GetAwaiter().GetResult();
}
});
await Task.Delay(100);
var retainedMessages = server.GetRetainedMessages();
Assert.AreEqual(ClientCount, retainedMessages.Count);
for (var i = 0; i < ClientCount; i++)
{
Assert.IsTrue(retainedMessages.Any(m => m.Topic == "r" + i));
}
}
finally
{
await server.StopAsync();
}
}
