/// <summary>
/// Downscale timer elapsed method
/// </summary>
/// <param name="sender">The timer object</param>
/// <param name="e">Elapsed event arguments</param>
/// <param name="totalClients">Total number of clients connected to the signaling server</param>
/// <param name="servers">The list of servers </param>
private async void DownscaleElapsedMethod(object sender, ElapsedEventArgs e, int totalClients, List <ConnectedServer> servers)
{
var deletePoolId = string.Empty;
if (this.batchService.GetAutoscalingStatus(totalClients, servers, out deletePoolId) == AutoscalingStatus.DownscaleRenderingPool)
{
var controller = new Cloud3DSTKController
{
Request = new HttpRequestMessage()
};
controller.Request.Properties.Add(
HttpPropertyKeys.HttpConfigurationKey,
new HttpConfiguration());
// Create a json body with the pool id to be deleted
var json = new DeletePoolApiJsonBody
{
PoolId = deletePoolId
};
// Scale down and remove pool
var result = await controller.DeletePool((JObject)JToken.FromObject(json));
}
this.downscaleTimer.Stop();
}
public async Task <HttpResponseMessage> Post(
[FromBody] JObject jsonBody)
{
if (jsonBody == null)
{
return(Request.CreateResponse(HttpStatusCode.BadRequest, ApiResultMessages.ErrorBodyIsEmpty));
}
var totalClients = jsonBody["totalSessions"]?.ToObject <int>();
var totalSlots = jsonBody["totalSlots"]?.ToObject <int>();
var serversList = jsonBody["servers"]?.ToObject <JObject>();
var connectedServers = new List <ConnectedServer>();
if (serversList != null && serversList.HasValues)
{
foreach (var server in serversList)
{
connectedServers.Add(server.Value.ToObject <ConnectedServer>());
}
}
if (!totalClients.HasValue || !totalSlots.HasValue)
{
return(Request.CreateResponse(HttpStatusCode.BadRequest));
}
var deletePoolId = string.Empty;
switch (this.batchService.GetAutoscalingStatus(totalClients.Value, connectedServers, out deletePoolId))
{
case AutoscalingStatus.NotEnabled:
{
return(Request.CreateResponse(HttpStatusCode.BadRequest, ApiResultMessages.WarningNoAutoscaling));
}
case AutoscalingStatus.UpscaleRenderingPool:
{
if (this.downscaleTimer != null && this.downscaleTimer.Enabled)
{
// We are approaching capacity, stop any down scale timer
this.downscaleTimer.Stop();
}
var controller = new Cloud3DSTKController
{
Request = new HttpRequestMessage()
};
controller.Request.Properties.Add(
HttpPropertyKeys.HttpConfigurationKey,
new HttpConfiguration());
// Create a json body with a specific pool and job ID. These should be unique to avoid conflict.
var json = new CreateApiJsonBody
{
RenderingPoolId = Guid.NewGuid().ToString()
};
// Spin up a new Rendering Pool
var result = await controller.Post((JObject)JToken.FromObject(json));
break;
}
case AutoscalingStatus.DownscaleRenderingPool:
{
if (this.downscaleTimer != null && !this.downscaleTimer.Enabled)
{
this.downscaleTimer.Elapsed += (sender, e) => this.DownscaleElapsedMethod(sender, e, totalClients.Value, connectedServers);
// Wait until the downscale threshold timout is met and delete the pool
this.downscaleTimer.Start();
}
break;
}
case AutoscalingStatus.OK:
{
if (this.downscaleTimer != null && this.downscaleTimer.Enabled)
{
// We are in normal parameters, stop any down scale timer
this.downscaleTimer.Stop();
}
break;
}
}
return(Request.CreateResponse(HttpStatusCode.OK));
}
