private DateTime GetStartTime(DateTime lastEndTime)
{
DateTime startTime;
if (lastEndTime == DateTime.MinValue)
{
if (string.IsNullOrEmpty(this.applicationType))
{
// We are processing Windows Fabric traces. Start retrieving
// traces right from the beginning.
startTime = DateTime.MinValue;
}
else
{
// We are processing application traces. Start retrieving
// traces from the earliest time that an instance of this
// application was activated.
startTime = AppActivationTable.GetEtwTracesStartTimeForApplicationType(this.applicationType);
if (startTime.Equals(DateTime.MaxValue))
{
// We were unable to retrieve the earliest time that
// an instance of this application was activated. So
// we'll start processing application traces from a
// few minutes ago.
startTime = DateTime.UtcNow.AddMinutes(DefaultAppEtwTracesStartTimeOffsetMinutes);
this.traceSource.WriteWarning(
"Unable to retrieve ETW traces processing start time for application type {0}.",
this.applicationType);
}
}
}
else
{
if (string.IsNullOrEmpty(this.applicationType))
{
// We are processing Windows Fabric traces. Start retrieving
// traces one tick after the timestamp where we left off previously.
startTime = lastEndTime.AddTicks(1);
}
else
{
// We are processing application traces. Start retrieving
// traces from the later of the following timestamps:
// #1. The earliest time that an instance of this application was activated.
// #2. One tick after the timestamp where we left off previously
startTime = AppActivationTable.GetEtwTracesStartTimeForApplicationType(this.applicationType);
if (startTime.Equals(DateTime.MaxValue) // We were unable to determine #1 above
||
(startTime.CompareTo(lastEndTime) <= 0))
{
startTime = lastEndTime.AddTicks(1);
}
}
}
return(startTime);
}
internal void DeleteApplicationInstance(string applicationInstanceId)
{
AppInstance appInstance;
lock (this.applicationInstances)
{
appInstance = this.applicationInstances[applicationInstanceId];
this.applicationInstances.Remove(applicationInstanceId);
}
Utility.TraceSource.WriteInfo(
TraceType,
"Deleting data collector for application instance {0} ...",
applicationInstanceId);
appInstance.FlushData();
appInstance.Dispose();
AppActivationTable.RemoveRecord(applicationInstanceId);
}
internal void CreateApplicationInstance(
string applicationInstanceId,
DateTime activationTime,
AppConfig appConfig,
string servicePackageName,
ServiceConfig serviceConfig)
{
if (false == activationTime.Equals(DateTime.MaxValue))
{
AppActivationTable.AddRecord(applicationInstanceId, appConfig.ApplicationType, activationTime);
}
AppInstance appInstance = new AppInstance(applicationInstanceId, appConfig, servicePackageName, serviceConfig, this.diskSpaceManager);
lock (this.applicationInstances)
{
this.applicationInstances[applicationInstanceId] = appInstance;
}
Utility.TraceSource.WriteInfo(
TraceType,
"Created data collector for application instance {0}.",
applicationInstanceId);
}
internal ServicePackageTableManager(AppInstanceManager appInstanceMgr)
{
this.applicationInstanceManager = appInstanceMgr;
this.servicePackageTable = new ServicePackageTable();
// Get the interval at which we need to read ETL files
int servicePackageNotificationIntervalSeconds = Utility.GetUnencryptedConfigValue(
HostingSectionName,
ServicePackageNotificationIntervalInSecondsParamName,
DefaultServicePackageNotificationIntervalInSeconds);
this.maxServicePackageInactiveTimeSeconds = servicePackageNotificationIntervalSeconds * MaxServicePackageInactiveTimeMultiplier;
Utility.TraceSource.WriteInfo(
TraceType,
"Interval at which we check for inactive service packages: {0} seconds.",
servicePackageNotificationIntervalSeconds);
Utility.TraceSource.WriteInfo(
TraceType,
"Maximum time for which a service package can remain inactive before being deleted: {0} seconds.",
this.maxServicePackageInactiveTimeSeconds);
// Create the folder where the backup files are stored
string tableBackupDirectory = Path.Combine(
Utility.LogDirectory,
AppInstanceDataDirName,
AppInstanceTableDirName);
FabricDirectory.CreateDirectory(tableBackupDirectory);
// Initialize the application activation table
AppActivationTable.Initialize(tableBackupDirectory);
// Retrieve the file where we last saved the service package table
this.tableBackup = new ServicePackageTableBackup(
tableBackupDirectory,
this.AddOrUpdateServicePackage);
// Initialize the service package table from the file that we last saved.
if (false == this.tableBackup.Read())
{
Utility.TraceSource.WriteError(
TraceType,
"Unable to initialize service package table from backup file on disk.");
}
// Initialize the timestamp up to which ETW events can be read
Utility.ApplicationEtwTracesEndTime = this.tableBackup.LatestBackupTime.Timestamp;
// Compute the directory containing ETL files containing information about
// application instances
string etlFileDirectory = Path.Combine(
Utility.LogDirectory,
AppInstanceDataDirName,
AppInstanceDataEtlDirName);
FabricDirectory.CreateDirectory(etlFileDirectory);
#if !DotNetCoreClrLinux
// Create the object that reads events from ETL files.
this.etlFileReader = new AppInstanceEtlFileDataReader(
etlFileDirectory,
this.tableBackup,
this.AddOrUpdateServicePackage,
this.RemoveServicePackage);
#endif
long inactiveServicePackageScanIntervalMillisec = ((long)servicePackageNotificationIntervalSeconds) * 1000;
this.inactiveServicePackageScanTimer = new DcaTimer(
InactiveServicePackageScanTimerId,
this.MarkInactiveServicePackagesForDeletion,
inactiveServicePackageScanIntervalMillisec);
this.inactiveServicePackageScanTimer.Start();
}
