private async Task <Device> FoundDevice(string clientid)
{
Device device = null;
var clients = await _serverEx.GetClientsAsync();
var client = clients.FirstOrDefault(c => c.Id == clientid);
if (client != null)
{
device = client.Session.Items[nameof(Device)] as Device;
if (device == null)
{
if (clientid != _mcsetting.MqttBroker)
{
_logger.LogWarning($"未能找到客户端{clientid }回话附加的设备信息，现在断开此链接。 ");
await client.DisconnectAsync();
}
}
}
else
{
_logger.LogWarning($"未能找到客户端{clientid }上下文信息");
}
return(device);
}
public static async Task PublishAsync(this MqttServer mqtt, string SenderClientId, MqttApplicationMessage message)
{
var clients = await mqtt.GetClientsAsync();
var client = clients.FirstOrDefault(c => c.Id == SenderClientId);
await client.Session.EnqueueApplicationMessageAsync(message);
}
public Task Execute(IJobExecutionContext context)
{
return(Task.Run(async() =>
{
//如果中断在mqtt服务器列表中， 则取得最后一次收到消息的时间戳，
using (var scope = _scopeFactor.CreateScope())
using (var _dbContext = scope.ServiceProvider.GetRequiredService <ApplicationDbContext>())
{
var clientstatus = await _serverEx.GetClientsAsync();
clientstatus.ToList().ForEach(cs =>
{
try
{
var _device = cs.Session.Items[nameof(Device)] as Device;
if (_device != null)
{
var d = _dbContext.Device.FirstOrDefault(d => d.Id == _device.Id);
if (d != null)
{
if (!d.Online && DateTime.Now.Subtract(d.LastActive).TotalSeconds > d.Timeout)
{
Task.Run(cs.DisconnectAsync);
}
}
}
}
catch (Exception ex)
{
_logger.LogInformation($"检查设备{cs.Id}-{cs.Endpoint}) 时遇到异常{ex.Message}{ex.InnerException?.Message} 发送消息:{cs.SentApplicationMessagesCount}({cs.BytesSent}kb) 收到{cs.ReceivedApplicationMessagesCount}({cs.BytesReceived / 1024}KB ) ");
}
});
var tfx = from d in _dbContext.Device where d.Timeout < 1 select d;
tfx.ToList().ForEach(d => d.Timeout = 300);
//当前时间减去最后活跃时间如果小于超时时间， 则为在线， 否则就是离线
_dbContext.Device.ToList().ForEach(d =>
{
if (d.Online && DateTime.Now.Subtract(d.LastActive).TotalSeconds > d.Timeout)
{
d.Online = false;
}
});
var saveresult = await _dbContext.SaveChangesAsync();
_logger.LogInformation($"设备检查程序已经处理{saveresult}调数据");
}
}));
}