/// <summary>
/// Timer callback for heartbeat
/// </summary>
/// <param name="state">unused state param</param>
private void RunHeartbeat(object state)
{
// If the heartbeat interval needs to be ignored, do so now and return
if (this.ignoreNextHeartbeatInterval)
{
this.ignoreNextHeartbeatInterval = false;
return;
}
// If the timer is closed, return
if (this.heartbeatTimer == null)
{
return;
}
bool isBrokerLoaded = false;
bool pingSucceeded = false;
try
{
// Connect to the broker launcher
IBrokerLauncher launcher = this.factory.GetBrokerLauncherClientForHeartbeat();
if (this.supportNewPing)
{
try
{
string result = launcher.PingBroker2(this.sessionId);
#if API
SessionBase.TraceSource.TraceEvent(TraceEventType.Verbose, 0, "[BrokerHeartbeatHelper] Ping succeeded. Result = {0}, ExpectedResult = {1}", result, this.expectPingResult);
#endif
pingSucceeded = true;
if (this.expectPingResult == null)
{
this.expectPingResult = result;
}
if (result == Constant.PingBroker2Result_BrokerNotExist ||
result != this.expectPingResult)
{
isBrokerLoaded = false;
}
else
{
isBrokerLoaded = true;
}
}
catch (ActionNotSupportedException)
{
if (this.expectPingResult == null)
{
this.supportNewPing = false;
}
else
{
throw;
}
}
}
if (!this.supportNewPing)
{
// Ping it
isBrokerLoaded = launcher.PingBroker(this.sessionId);
pingSucceeded = true;
}
}
catch (Exception e)
{
#if API
SessionBase.TraceSource.TraceEvent(TraceEventType.Warning, 0, "[BrokerHeartbeatHelper] Exception occured when pinging broker: {0}", e);
#elif WebAPI
Microsoft.Hpc.RuntimeTrace.TraceHelper.TraceInfo(this.sessionId, "[BrokerHeartbeatHelper] Exception occured when pinging broker: {0}", e);
#endif
// If the max missed heartbeats have been hit
if (++this.missedHeartbeats == this.clientBrokerHeartbeatRetryCount)
{
// Signal the broker is down
this.SendBrokerDownSignal(true);
// Shutdown the heartbeat
this.Stop();
}
else
{
// Recreate the broker controller client so it can be used for next ping
this.factory.CloseBrokerLauncherClientForHeartbeat();
}
}
// If ping call succeeded
if (pingSucceeded)
{
// If broker isnt loaded
if (!isBrokerLoaded)
{
// Signal the broker is down
this.SendBrokerDownSignal(false);
// Shutdown the heartbeat
this.Stop();
}
else
{
// Suceeded so reset missed heartbeat count
this.missedHeartbeats = 0;
}
}
}
