public async Task <ActionResult <List <NodeStatusVM> > > Status()
{
var lastStatus = (await nodeStatusCol.Aggregate()
.SortByDescending(s => s.Id)
.Group("{_id: \"$" + nameof(NodeStatusRange.NodeId) + "\", Last: {$first: \"$$ROOT\"}}")
.As <LastNodeStatusRange>().ToListAsync())
.Select(x => Mapper.Map <NodeStatusVM>(x.Last))
.ToList();
var nodes = (await nodesCol.AllAsync()).ToDictionary(k => k.Id);
foreach (var item in lastStatus)
{
if (nodes.ContainsKey(item.NodeId))
{
item.Address = nodes[item.NodeId].Address;
item.Name = nodes[item.NodeId].Name;
}
}
return(lastStatus.Where(i => i.Name != null).OrderBy(i => i.NodeId).ToList());
}
public async Task <ActionResult <List <NetworkNode> > > List()
{
return((await nodesCol.AllAsync()).ToList());
}
public async Task <ActionResult <List <string> > > GlobalAlertReceivers()
{
return((await alertReceiversCol.AllAsync()).Select(a => a.Address).ToList());
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
while (!stoppingToken.IsCancellationRequested)
{
await Task.Delay(1000, stoppingToken);
var nodes = nodesCol.All();
foreach (var node in nodes)
{
if (stoppingToken.IsCancellationRequested)
{
break;
}
var lastStatus = statusCol.Find(s => s.NodeId == node.Id).SortByDescending(s => s.LastTime).FirstOrDefault(cancellationToken: stoppingToken);
if (node.CheckMechanism == NetworkNode.CheckMechanismEnum.Ping)
{
Ping p = new Ping();
try
{
if (lastStatus == null)
{
lastStatus = NewStatus(node.Id);
}
var reply = await p.SendPingAsync(node.Address, 2000);
if (lastStatus.IpStatus != reply.Status)
{
lastStatus = NewStatus(node.Id);
}
lastStatus.IpStatus = reply.Status;
}
catch (Exception ex)
{
lastStatus.ErrorMessage = GetErrorMessages(ex);
}
}
else if (node.CheckMechanism == NetworkNode.CheckMechanismEnum.Http)
{
var httpClient = httpClientFactory.CreateClient();
try
{
string address = node.Address;
if (!address.StartsWith("http"))
{
address = "http://" + node.Address;
}
if (lastStatus == null)
{
lastStatus = NewStatus(node.Id);
}
var reply = await httpClient.GetAsync(address, stoppingToken);
if (lastStatus.HttpStatus != reply.StatusCode)
{
lastStatus = NewStatus(node.Id);
}
lastStatus.HttpStatus = reply.StatusCode;
}
catch (Exception ex)
{
lastStatus.ErrorMessage = GetErrorMessages(ex);
}
}
else
{
throw new NotImplementedException();
}
// Send alert if required:
if (!lastStatus.IsSuccess &&
(lastStatus.AlertSendTime == null || DateTime.Now - lastStatus.AlertSendTime > TimeSpan.FromMinutes(alertResendMinutes)) &&
DateTime.Now - lastStatus.StartTime > TimeSpan.FromSeconds(errorWaitSeconds))
{
var content = alertContent.Replace("{nodeName}", node.Name);
var receivers = new HashSet <string>();
if (node.AlertReceivers != null)
{
foreach (var dest in node.AlertReceivers)
{
if (!receivers.Contains(dest))
{
await alertSender.Send(node.Id, dest, content);
receivers.Add(dest);
}
}
}
foreach (var dest in (await alertReceiversCol.AllAsync()).Select(r => r.Address))
{
if (!receivers.Contains(dest))
{
await alertSender.Send(node.Id, dest, content);
receivers.Add(dest);
}
}
lastStatus.AlertSendTime = DateTime.Now;
}
lastStatus.LastTime = DateTime.Now;
await statusCol.SaveAsync(lastStatus);
}
}
}