private async Task HostUpdated(ServiceDirectory directory, ServiceEntry entry)
{
RuntimeMonitor.Monitor.RegisterCall("HostUpdated");
LampClient newClient = new LampClient(ServiceEntryToUrl(entry), ServiceEntryToName(entry));
// Update info in DB
using (var client = new DatabaseClient())
{
var node = client.GetOne(newClient.Name);
if (node != null)
{
node.LastSeen = entry.LastSeenAlive;
node.Online = true;
node.Url = newClient.Url;
client.AddOrUpdate(node);
}
else
{
// For some reason, this node was updated but no longer in the database
// Then treat it as an addition
await HostDiscovered(directory, entry, true);
}
}
}
protected virtual void Serve(LampRequest request)
{
var record = GetLampDb(request.Id);
var client = new LampClient(record);
record.ProcessStateChanges(request.Data);
client.SetState().Wait(); // Synchronously set the state. It may throw an exception
UpdateLampDb(record);
}
protected void UpdateDb(LampClient lamp)
{
RuntimeMonitor.Monitor.RegisterCall("UpdateDb");
// Add new client to database
if (lamp.StateSet)
{
using (var client = new DatabaseClient())
client.AddOrUpdate(lamp.Node);
}
}
private async Task HostDiscovered(ServiceDirectory directory, ServiceEntry entry, bool fromUpdate = false)
{
RuntimeMonitor.Monitor.RegisterCall("HostDiscovered");
Logger.Log("Host discovered: {0}{1}", entry.ToShortString(), fromUpdate ? " from HostUpdated event" : "");
LampClient newClient = new LampClient(ServiceEntryToUrl(entry), ServiceEntryToName(entry));
// Get status and add to DB
await GetLampStatus(newClient);
UpdateDb(newClient);
}
protected async Task GetLampStatus(LampClient lamp)
{
RuntimeMonitor.Monitor.RegisterCall("GetLampStatus");
// Assume the lamp is online and get its state
lamp.Online = true;
try
{
await lamp.GetState();
}
catch (Exception)
{
lamp.Online = false;
}
}
private async Task UpdateSingleLamp(DatabaseClient db, LampNode lamp)
{
RuntimeMonitor.Monitor.RegisterCall("UpdateSingleLamp");
var lampClient = new LampClient(lamp);
try
{
await lampClient.GetState();
db.AddOrUpdate(lampClient.Node);
}
catch
{
// Error is ok; if the lamp is not seen, it will be removed
}
}