public void StartAllIStartable()
{
HealthChecks.RegisterHealthCheck("Startable", (Func <HealthCheckResult>)StartableHealtCheck);
IHandler[] handlers = Kernel.GetAssignableHandlers(typeof(object));
IEnumerable <HandlerInfo> startableHandlers = GetStartableHandlers(handlers);
foreach (var handlerInfo in startableHandlers.OrderBy(h => h.Priority))
{
try
{
handlerInfo.Handler.Resolve(CreationContext.CreateEmpty());
_logger.InfoFormat("Component {0} started correctly.", handlerInfo.Description);
}
catch (Exception ex)
{
_logger.ErrorFormat(ex, "Cannot start component {0} because it raised exception. Retry in {1} seconds.", handlerInfo.Description, _timeoutInSecondsBeforeRetryRestartFailedServices);
handlerInfo.StartException = ex;
_handlersWithStartError.Add(handlerInfo);
}
}
if (_handlersWithStartError.Count > 0)
{
_retryStartTimer = new System.Threading.Timer(
RetryStartTimerCallback,
null,
1000 * _timeoutInSecondsBeforeRetryRestartFailedServices, //Due time
1000 * _timeoutInSecondsBeforeRetryRestartFailedServices //Period
);
}
}
public static void Register(HttpConfiguration config, IQuery store, IEnumerable <IHealthCheck> healthChecks = null)
{
HealthChecks.SetSiteName(HostingEnvironment.SiteName);
HealthChecks.SetApplication(ConfigurationManager.AppSettings["ASI:ApplicationName"] ?? HostingEnvironment.ApplicationVirtualPath);
var checks = healthChecks as IHealthCheck[] ?? healthChecks?.ToArray() ?? new IHealthCheck[] { };
if (checks.OfType <PerformanceHealthCheck>().Any())
{
HealthChecks.RegisterHealthCheck(new PerformanceHealthCheck("Performance", store));
}
for (var i = 0; i < ConfigurationManager.ConnectionStrings.Count; i++)
{
HealthChecks.RegisterHealthCheck(new DatabaseConnectivityHealthCheck(ConfigurationManager.ConnectionStrings[i]));
}
if (healthChecks != null)
{
foreach (var check in checks)
{
HealthChecks.RegisterHealthCheck(check);
}
}
var interval = GetPollingInterval();
HealthChecks.Poll((int)TimeSpan.FromMinutes(interval).TotalMilliseconds);
}
protected override void OnStart(string[] args)
{
Log.Debug("OnStart");
if (HealthChecksSection == null || HealthChecksSection.HealthChecks == null || HealthChecksSection.HealthChecks.Count == 0)
{
Log.Error(SystemConstants.MISSING_HEALTH_CHECK_SECTION);
}
try
{
HealthChecks healthCheckConfigs = HealthChecksSection.GetConfig().HealthChecks;
for (int ii = 0; ii < healthCheckConfigs.Count; ii++)
{
healthChecks.Add(healthCheckConfigs[ii]);
}
IKernel kernel = new BindKernelwithHealthChecks(new StandardKernel(new ServiceModule()), HealthChecksSection.HealthChecks).Bind();
healthCheckList = new HealthCheckList(healthChecks, kernel);
healthCheckList.HealthCheckError += HealthCheckList_HealthCheckError;
healthCheckList.SeriousResult += HealthCheckList_SeriousResult;
healthCheckList.Start();
}
catch (ScheduleProviderException ex)
{
Log.ErrorFormat($"Failed: {ex.ProviderName}");
Log.Error(ex);
OnStop();
}
finally
{
Log.Debug("Finished OnStart");
}
}
public BindKernelwithHealthChecks(StandardKernel kernel, HealthChecks healthChecks)
{
if (kernel == null || healthChecks == null)
{
throw new ArgumentNullException("kernel or HealthChecks parameter is null");
}
Kernel = kernel;
HealthChecks = healthChecks;
}
