public override void Run()
{
Task hostUpdaterTask = null;
Trace.TraceInformation("Instance run - Entering main loop");
while (true)
{
try
{
bool isMainSequencerFreeze = bool.Parse(RoleEnvironment.GetConfigurationSettingValue("MainSequencerFreeze"));
bool hasDriveMounted = false;
// 1.We try to mount each disk declared in azure table
while (!hasDriveMounted)
{
shard = PoolForDisk();
hasDriveMounted = shard != null;
if (hasDriveMounted)
break;
Trace.TraceInformation("Instance run - Waiting for disk to mount");
Thread.Sleep(2000);
}
// 2. Update Entry in Azure Table
Task updateIp = new Task(new Action(() =>
{
bool ipHasBeenUpdated = false;
// We have mounted a drive, we must register this IP address
Trace.TraceInformation("Instance start - Registering IP");
while (!ipHasBeenUpdated)
{
//
ipHasBeenUpdated = MongoHelper.UpdateShardIpWithName(shard.RowKey);
if (ipHasBeenUpdated)
{
Trace.TraceInformation("Instance start - Registering successful");
}
else
{
Trace.TraceError("Instance start - Registering IP failed! will retry in 5s");
}
Thread.Sleep(5000);
}
}));
updateIp.Start();
hostUpdaterTask = new Task(new Action(() => { HostUpdater.Run(true); }));
while (true)
{
try
{
if (hostUpdaterTask.Status != TaskStatus.Running)
{
hostUpdaterTask.Start();
}
}
catch (Exception ex)
{
Trace.TraceError(ex.ToString());
}
try
{
//Serialize operations to avoid conflicting instructions with MongoD process
lock (MainSequencerLock)
{
if (isMainSequencerFreeze)
{
Trace.TraceWarning("Instance run Main Loop - MainSequencerFreeze = True : Doing nothing");
}
else
{
// Time for action, depending of our status
//=========================================
ReplicaSetRoleManager.ReplicaSetRoleState CurrentStatus = ReplicaSetRoleManager.GetState();
if (ReplicaSetRoleManager.ReplicaSetRoleState.InstanceRunning != CurrentStatus)
{
bool autorestart = false;
bool.TryParse(RoleEnvironment.GetConfigurationSettingValue("AutoRestart"), out autorestart);
if (autorestart)
{
Trace.TraceInformation("MongoD is not running, will launch a process");
LaunchMongoDProcess();
}
}
}
}
}
catch (Exception ex)
{
Trace.TraceError(string.Format("Instance run - Exception in Main loop : {0} ({1}) at {2}", ex.Message, ex.InnerException == null ? "" : ex.InnerException.Message, ex.StackTrace));
}
catch
{
Trace.TraceError("Uncaught exception in Main Sequencer");
}
}
}
catch (Exception ex)
{
Trace.TraceError("Error in main loop : " + ex.ToString());
}
catch
{
Trace.TraceError("Uncaught exception in Main Loop");
}
}
}
public static bool CreateShardInfo(string name, string vhd, string ip)
{
InitializeTableHelper();
ShardInfo info = new ShardInfo(name, vhd, RoleEnvironment.CurrentRoleInstance.Id, ip);
return _tableHelperShardInfo.AddItem(info);
}
