private void ReturnOnMaintenance(ActionExecutingContext actionContext, MaintenanceModeResponse status)
{
var expectedRemainingDuration = status.ActualStart.HasValue && status.PlannedDuration.HasValue
? (int?)(status.PlannedDuration.Value - (DateTime.UtcNow - status.ActualStart.Value)).TotalMinutes
: null;
actionContext.Result = new JsonResult(
new MaintenanceResponse
{
Message = "Sorry, application is on maintenance. Please try again later.",
PlannedDurationInMinutes = (int?)status.PlannedDuration?.TotalMinutes,
ExpectedRemainingDurationInMinutes = expectedRemainingDuration,
})
{
StatusCode = 503,
};
}
public override async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
try
{
if (!context.Controller.GetType().ToString().Contains("IsAliveController"))
{
var value = await _database.StringGetAsync(IsOnMaintenanceCacheKey);
MaintenanceModeResponse maintenanceStatus = null;
try
{
if (value.HasValue)
{
maintenanceStatus = value.ToString().DeserializeJson <MaintenanceModeResponse>();
}
else
{
maintenanceStatus = await _maintenanceModeClient.Api.GetActiveMaintenanceDetailsAsync();
await _database.StringSetAsync(
IsOnMaintenanceCacheKey,
maintenanceStatus.ToJson(),
TimeSpan.FromMinutes(1));
}
}
catch (Exception e)
{
_log.Warning("Couldn't fetch maintenance status", e);
}
if (maintenanceStatus?.IsEnabled ?? false)
{
ReturnOnMaintenance(context, maintenanceStatus);
return;
}
}
}
catch (Exception e)
{
_log.Error(e);
}
await next();
}