internal static bool GetBackupFileTimestamp(string backupFileName, out EtwEventTimestamp dataTimestamp)
{
dataTimestamp = new EtwEventTimestamp();
dataTimestamp.Timestamp = DateTime.MinValue;
dataTimestamp.Differentiator = 0;
string fileNameWithoutExtension = Path.ChangeExtension(
backupFileName,
null);
string timestampAsString = fileNameWithoutExtension.Remove(
0,
BackupFilePrefix.Length);
string[] timestampParts = timestampAsString.Split('_');
if (timestampParts.Length != (int)TimestampParts.Count)
{
Utility.TraceSource.WriteError(
TraceType,
"Timestamp information {0} in file name {1} is not in the correct format.",
timestampAsString,
backupFileName);
return(false);
}
long timestampAsBinary;
if (false == long.TryParse(
timestampParts[(int)TimestampParts.Timestamp],
out timestampAsBinary))
{
Utility.TraceSource.WriteError(
TraceType,
"Unable to parse {0} in file name {1} as a long integer.",
timestampParts[(int)TimestampParts.Timestamp],
backupFileName);
return(false);
}
DateTime timestamp = DateTime.FromBinary(timestampAsBinary);
int differentiator;
if (false == int.TryParse(
timestampParts[(int)TimestampParts.Differentiator],
out differentiator))
{
Utility.TraceSource.WriteError(
TraceType,
"Unable to parse {0} in file name {1} as a long integer.",
timestampParts[(int)TimestampParts.Differentiator],
backupFileName);
return(false);
}
dataTimestamp.Timestamp = timestamp;
dataTimestamp.Differentiator = differentiator;
return(true);
}
internal bool Read()
{
// Get the backup files
// Note: There might be more than one backup file if we encountered
// errors during previous attempts to delete one or more files.
string backupFilePattern = string.Concat(
BackupFilePrefix,
"*.",
BackupFileExt);
DirectoryInfo dirInfo = new DirectoryInfo(this.backupDirectory);
FileInfo[] backupFiles = dirInfo.GetFiles(backupFilePattern);
// If we didn't find any backup files, then return immediately
if (backupFiles.Length == 0)
{
Utility.TraceSource.WriteInfo(
TraceType,
"No backup files found in directory {0}",
this.backupDirectory);
return(true);
}
// Get the latest backup file. We only care about the latest.
Array.Sort(backupFiles, this.CompareFileLastWriteTimes);
FileInfo backupFile = backupFiles[0];
// Get the timestamp up to which up to which the backup file is valid.
EtwEventTimestamp dataTimestamp;
if (false == GetBackupFileTimestamp(
backupFile.Name,
out dataTimestamp))
{
return(false);
}
this.LatestBackupTime = dataTimestamp;
Utility.TraceSource.WriteInfo(
TraceType,
"Backup file {0} is valid up to {1} ({2}, {3}).",
backupFile.FullName,
dataTimestamp.Timestamp,
dataTimestamp.Timestamp.Ticks,
dataTimestamp.Differentiator);
Utility.TraceSource.WriteInfo(
TraceType,
"Reading backup file {0} ...",
backupFile.FullName);
// Read data from the backup file
return(this.ReadFromBackupFile(backupFile.FullName, dataTimestamp));
}
internal ServicePackageTableBackup(
string directory,
ServicePackageTableManager.AddOrUpdateHandler addOrUpdateServicePackageHandler)
{
this.backupDirectory = directory;
this.addOrUpdateServicePackageHandler = addOrUpdateServicePackageHandler;
EtwEventTimestamp etwEventTimestamp = new EtwEventTimestamp();
etwEventTimestamp.Timestamp = DateTime.MinValue;
etwEventTimestamp.Differentiator = 0;
this.LatestBackupTime = etwEventTimestamp;
}
private void ProcessServicePackageInactiveEvent(
EventRecord eventRecord,
string taskName,
string eventName,
EtwEventTimestamp eventTimestamp,
bool implicitlyInactive)
{
ApplicationDataReader reader = new ApplicationDataReader(
eventRecord.UserData,
eventRecord.UserDataLength);
// Verify event version
int eventVersion = reader.ReadInt32();
if (eventVersion > MaxServicePackageDeactivatedEventVersion)
{
Utility.TraceSource.WriteError(
TraceType,
"Unexpected version {0} encountered for event name {1}. Event will be ignored.",
eventVersion,
eventName);
return;
}
// Get the node name
string nodeName = reader.ReadUnicodeString();
// Get the application instance ID
string appInstanceId = reader.ReadUnicodeString();
// Get the service package name
string servicePackageName = reader.ReadUnicodeString();
Utility.TraceSource.WriteInfo(
TraceType,
"ETW event received. Task {0}, event {1}, node name: {2}, application instance ID: {3}, service package name: {4}.",
taskName,
eventName,
nodeName,
appInstanceId,
servicePackageName);
// Delete record from service package table
this.RemoveServicePackageHandler(nodeName, appInstanceId, servicePackageName, eventTimestamp, true, implicitlyInactive);
}
internal int CompareTo(EtwEventTimestamp otherTimestamp)
{
int dateTimeCompareResult = this.Timestamp.CompareTo(otherTimestamp.Timestamp);
if (dateTimeCompareResult != 0)
{
return(dateTimeCompareResult);
}
if (this.Differentiator < otherTimestamp.Differentiator)
{
return(-1);
}
else if (this.Differentiator == otherTimestamp.Differentiator)
{
return(0);
}
else
{
return(1);
}
}
private void ProcessTableRecord(string tableRecord, string backupFilePath, EtwEventTimestamp dataTimestamp)
{
string[] tableRecordParts = tableRecord.Split(',');
if (tableRecordParts.Length != (int)TableRecordParts.Count)
{
Utility.TraceSource.WriteError(
TraceType,
"Table record {0} in backup file {1} is not in the correct format.",
tableRecord,
backupFilePath);
return;
}
string nodeName = tableRecordParts[(int)TableRecordParts.NodeName].Trim();
string appInstanceId = tableRecordParts[(int)TableRecordParts.ApplicationInstanceId].Trim();
string appRolloutVersion = tableRecordParts[(int)TableRecordParts.ApplicationRolloutVersion].Trim();
string servicePackageName = tableRecordParts[(int)TableRecordParts.ServicePackageName].Trim();
string serviceRolloutVersion = tableRecordParts[(int)TableRecordParts.ServiceRolloutVersion].Trim();
string runLayoutRoot = tableRecordParts[(int)TableRecordParts.RunLayoutRoot].Trim();
ServicePackageTableRecord record = new ServicePackageTableRecord(
nodeName,
appInstanceId,
appRolloutVersion,
servicePackageName,
serviceRolloutVersion,
runLayoutRoot,
default(DateTime));
this.addOrUpdateServicePackageHandler(
nodeName,
appInstanceId,
DateTime.MaxValue, // service package activation time unknown
servicePackageName,
record,
dataTimestamp,
false);
}
private bool ReadFromBackupFile(string backupFilePath, EtwEventTimestamp dataTimestamp)
{
// Open the backup file
StreamReader reader = null;
try
{
Utility.PerformIOWithRetries(
() =>
{
FileStream file = FabricFile.Open(backupFilePath, FileMode.Open, FileAccess.Read);
#if !DotNetCoreClrLinux
Helpers.SetIoPriorityHint(file.SafeFileHandle, Kernel32Types.PRIORITY_HINT.IoPriorityHintVeryLow);
#endif
reader = new StreamReader(file);
});
}
catch (Exception e)
{
Utility.TraceSource.WriteExceptionAsError(
TraceType,
e,
"Unable to open backup file {0}",
backupFilePath);
return(false);
}
try
{
// Get the version line
string versionLine = string.Empty;
try
{
Utility.PerformIOWithRetries(
() =>
{
versionLine = reader.ReadLine();
});
}
catch (Exception e)
{
Utility.TraceSource.WriteExceptionAsError(
TraceType,
e,
"Unable to read version line from backup file {0}",
backupFilePath);
return(false);
}
if (null == versionLine)
{
Utility.TraceSource.WriteError(
TraceType,
"Backup file {0} does not contain a version line.",
backupFilePath);
return(false);
}
// Ensure that the version line is compatible
if (false == versionLine.Equals(
BackupFileVersionString,
StringComparison.Ordinal))
{
Utility.TraceSource.WriteError(
TraceType,
"Backup file {0} has incompatible file version '{1}'.",
backupFilePath,
versionLine);
return(false);
}
// Read the service package table rows from the file
string tableRecord = null;
for (;;)
{
tableRecord = string.Empty;
try
{
Utility.PerformIOWithRetries(
() =>
{
tableRecord = reader.ReadLine();
});
}
catch (Exception e)
{
Utility.TraceSource.WriteExceptionAsError(
TraceType,
e,
"Unable to retrieve table record from backup file {0}",
backupFilePath);
return(false);
}
if (null == tableRecord)
{
// Reached end of file
Utility.TraceSource.WriteInfo(
TraceType,
"Reached end of backup file {0}",
backupFilePath);
break;
}
this.ProcessTableRecord(tableRecord, backupFilePath, dataTimestamp);
}
}
finally
{
reader.Dispose();
}
return(true);
}
internal bool Update(Dictionary <string, ServicePackageTableRecord> servicePackageTable, EtwEventTimestamp latestDataTimestamp)
{
// Create a new temp file
string tempFilePath = Utility.GetTempFileName();
string backupFilePath = string.Empty;
try
{
// Open the temp file
StreamWriter writer = null;
try
{
Utility.PerformIOWithRetries(
() =>
{
FileStream file = FabricFile.Open(tempFilePath, FileMode.Create, FileAccess.Write);
#if !DotNetCoreClrLinux
Helpers.SetIoPriorityHint(file.SafeFileHandle, Kernel32Types.PRIORITY_HINT.IoPriorityHintVeryLow);
#endif
writer = new StreamWriter(file);
});
}
catch (Exception e)
{
Utility.TraceSource.WriteExceptionAsError(
TraceType,
e,
"Failed to open temp file {0}.",
tempFilePath);
return(false);
}
try
{
// Write the version information to the backup file
try
{
Utility.PerformIOWithRetries(
() =>
{
writer.WriteLine(BackupFileVersionString);
});
}
catch (Exception e)
{
Utility.TraceSource.WriteExceptionAsError(
TraceType,
e,
"Failed to write version information to temp file {0}.",
tempFilePath);
return(false);
}
// Write the table records to the backup file
foreach (string tableKey in servicePackageTable.Keys)
{
string tableRecord = string.Concat(
servicePackageTable[tableKey].NodeName,
", ",
servicePackageTable[tableKey].ApplicationInstanceId,
", ",
servicePackageTable[tableKey].ApplicationRolloutVersion,
", ",
servicePackageTable[tableKey].ServicePackageName,
", ",
servicePackageTable[tableKey].ServiceRolloutVersion,
", ",
servicePackageTable[tableKey].RunLayoutRoot);
try
{
Utility.PerformIOWithRetries(
() =>
{
writer.WriteLine(tableRecord);
});
}
catch (Exception e)
{
Utility.TraceSource.WriteExceptionAsError(
TraceType,
e,
"Failed to write record {0} to temp file {1}",
tableRecord,
tempFilePath);
return(false);
}
}
}
finally
{
writer.Dispose();
}
// Compute the name of the backup file
long timstampBinary = latestDataTimestamp.Timestamp.ToBinary();
string fileName = string.Concat(
BackupFilePrefix,
timstampBinary.ToString("D20", CultureInfo.InvariantCulture),
"_",
latestDataTimestamp.Differentiator.ToString("D10", CultureInfo.InvariantCulture),
".",
BackupFileExt);
backupFilePath = Path.Combine(this.backupDirectory, fileName);
// Copy the temp file as the new backup file
try
{
Utility.PerformIOWithRetries(
() =>
{
FabricFile.Copy(tempFilePath, backupFilePath, true);
});
}
catch (Exception e)
{
Utility.TraceSource.WriteExceptionAsError(
TraceType,
e,
"Failed to copy file {0} to {1}",
tempFilePath,
backupFilePath);
return(false);
}
Utility.TraceSource.WriteInfo(
TraceType,
"Backup file {0} created. The backup file is valid up to timestamp {1} ({2}, {3}).",
backupFilePath,
latestDataTimestamp.Timestamp,
latestDataTimestamp.Timestamp.Ticks,
latestDataTimestamp.Differentiator);
}
finally
{
try
{
Utility.PerformIOWithRetries(
() =>
{
FabricFile.Delete(tempFilePath);
});
}
catch (Exception e)
{
Utility.TraceSource.WriteExceptionAsError(
TraceType,
e,
"Failed to delete temp file {0}",
tempFilePath);
}
}
// Update the latest backup time
this.LatestBackupTime = latestDataTimestamp;
// Delete older backup files
string backupFilePattern = string.Concat(
BackupFilePrefix,
"*.",
BackupFileExt);
string[] backupFiles = FabricDirectory.GetFiles(
this.backupDirectory,
backupFilePattern);
foreach (string fileToDelete in backupFiles)
{
if (fileToDelete.Equals(
backupFilePath,
StringComparison.OrdinalIgnoreCase))
{
// Don't delete the current backup file
continue;
}
try
{
Utility.PerformIOWithRetries(
() =>
{
FabricFile.Delete(fileToDelete);
});
}
catch (Exception e)
{
// Deletion is on a best-effort basis. Log an error and
// continue.
Utility.TraceSource.WriteExceptionAsError(
TraceType,
e,
"Failed to delete old backup file {0}",
fileToDelete);
}
}
return(true);
}
protected void OnEtwEventReceived(object sender, EventRecordEventArgs e)
{
if (this.Stopping)
{
// DCA is stopping. Don't process any more events.
return;
}
DateTime eventDateTime = DateTime.FromFileTimeUtc(e.Record.EventHeader.TimeStamp);
EtwEventTimestamp eventTimestamp = new EtwEventTimestamp();
eventTimestamp.Timestamp = eventDateTime;
if (eventDateTime.Equals(this.MostRecentEtwEventTimestamp.Timestamp))
{
// This event has the same timestamp as the previous one. Increment the
// differentiator so that we can keep track of how far we've read.
eventTimestamp.Differentiator = this.MostRecentEtwEventTimestamp.Differentiator + 1;
}
else
{
// This event has a later timestamp than the previous one. Initialize
// the differentiator to 0.
Debug.Assert(
eventDateTime.CompareTo(
this.MostRecentEtwEventTimestamp.Timestamp) > 0,
"Event timestamps should only move forward in time.");
eventTimestamp.Differentiator = 0;
}
Utility.TraceSource.WriteInfo(
TraceType,
"ETW event received. Timestamp: {0} ({1}, {2}).",
eventTimestamp.Timestamp,
eventTimestamp.Timestamp.Ticks,
eventTimestamp.Differentiator);
if (eventTimestamp.CompareTo(this.LatestProcessedEtwEventTimestamp) > 0)
{
// This event occurred after our last processed event. So we need to
// process it.
this.ProcessEtwEvent(e.Record, eventTimestamp);
// Update our latest processed event
this.LatestProcessedEtwEventTimestamp = eventTimestamp;
Utility.TraceSource.WriteInfo(
TraceType,
"The latest timestamp upto which we have processed ETW events is {0} ({1}, {2}).",
this.LatestProcessedEtwEventTimestamp.Timestamp,
this.LatestProcessedEtwEventTimestamp.Timestamp.Ticks,
this.LatestProcessedEtwEventTimestamp.Differentiator);
}
else
{
Utility.TraceSource.WriteInfo(
TraceType,
"Ignoring an ETW event because its timestamp {0} ({1}, {2}) is older than the latest timestamp {3} ({4}, {5}) that we have already processed. Ignored event ID: {6}.",
eventTimestamp.Timestamp,
eventTimestamp.Timestamp.Ticks,
eventTimestamp.Differentiator,
this.LatestProcessedEtwEventTimestamp.Timestamp,
this.LatestProcessedEtwEventTimestamp.Timestamp.Ticks,
this.LatestProcessedEtwEventTimestamp.Differentiator,
e.Record.EventHeader.EventDescriptor.Id);
}
this.MostRecentEtwEventTimestamp = eventTimestamp;
}
private void ProcessServicePackageActiveEvent(EventRecord eventRecord, string taskName, string eventName, EtwEventTimestamp eventTimestamp, int maxVersion)
{
ApplicationDataReader reader = new ApplicationDataReader(
eventRecord.UserData,
eventRecord.UserDataLength);
// Verify event version
int eventVersion = reader.ReadInt32();
if (eventVersion > maxVersion)
{
Utility.TraceSource.WriteError(
TraceType,
"Unexpected version {0} encountered for event name {1}. Event will be ignored.",
eventVersion,
eventName);
return;
}
// Get the node name
string nodeName = reader.ReadUnicodeString();
// Get the root directory for the run layout
string runLayoutRoot = reader.ReadUnicodeString();
// Get the application instance ID
string appInstanceId = reader.ReadUnicodeString();
// Get the application rollout version
string appRolloutVersion = reader.ReadUnicodeString();
// Get the service package name
string servicePackageName = reader.ReadUnicodeString();
// Get the service package rollout version
string serviceRolloutVersion = reader.ReadUnicodeString();
// Create a record for the application data table
ServicePackageTableRecord record = new ServicePackageTableRecord(
nodeName,
appInstanceId,
appRolloutVersion,
servicePackageName,
serviceRolloutVersion,
runLayoutRoot,
default(DateTime));
Utility.TraceSource.WriteInfo(
TraceType,
"ETW event received. Task {0}, event {1}, node name: {2}, application instance ID: {3}, application rollout version: {4}, service package name: {5}, service rollout version: {6}.",
taskName,
eventName,
nodeName,
record.ApplicationInstanceId,
record.ApplicationRolloutVersion,
record.ServicePackageName,
record.ServiceRolloutVersion);
// Add or update record in service package table
this.AddOrUpdateServicePackageHandler(
nodeName,
appInstanceId,
eventTimestamp.Timestamp,
servicePackageName,
record,
eventTimestamp,
true);
}
private void ProcessEtwEvent(EventRecord eventRecord, EtwEventTimestamp eventTimestamp)
{
try
{
// Get the event definition
EventDefinition eventDefinition = this.manifestCache.GetEventDefinition(
eventRecord);
// Ignore event source manifests and heartbeat events
if ((eventDefinition == null && eventRecord.EventHeader.EventDescriptor.Id == 0) ||
EventSourceHelper.CheckForDynamicManifest(eventRecord.EventHeader.EventDescriptor))
{
return;
}
bool unexpectedEvent = false;
if (eventDefinition.TaskName.Equals(HostingTaskName))
{
// Verify event name
if (eventDefinition.EventName.Equals(ServicePackageActivatedEventName))
{
this.ProcessServicePackageActiveEvent(
eventRecord,
eventDefinition.TaskName,
eventDefinition.EventName,
eventTimestamp,
MaxServicePackageActivatedEventVersion);
}
else if (eventDefinition.EventName.Equals(ServicePackageUpgradedEventName))
{
this.ProcessServicePackageActiveEvent(
eventRecord,
eventDefinition.TaskName,
eventDefinition.EventName,
eventTimestamp,
MaxServicePackageUpgradedEventVersion);
}
else if (eventDefinition.EventName.Equals(ServicePackageDeactivatedEventName))
{
this.ProcessServicePackageInactiveEvent(
eventRecord,
eventDefinition.TaskName,
eventDefinition.EventName,
eventTimestamp,
false);
}
else
{
unexpectedEvent = true;
}
}
else if (eventDefinition.TaskName.Equals(DcaTaskName))
{
if (eventDefinition.EventName.Equals(ServicePackageInactiveEventName))
{
this.ProcessServicePackageInactiveEvent(
eventRecord,
eventDefinition.TaskName,
eventDefinition.EventName,
eventTimestamp,
true);
}
else
{
unexpectedEvent = true;
}
}
else
{
unexpectedEvent = true;
}
if (unexpectedEvent)
{
Utility.TraceSource.WriteWarning(
TraceType,
"Unexpected event (task name {0}, event name {1}) encountered. Event will be ignored.",
eventDefinition.TaskName,
eventDefinition.EventName);
}
}
catch (Exception e)
{
Utility.TraceSource.WriteError(
TraceType,
"Exception encountered while processing event with ID {0}, Task {1}. Exception information: {2}.",
eventRecord.EventHeader.EventDescriptor.Id,
eventRecord.EventHeader.EventDescriptor.Task,
e);
}
}
private void Read(object state)
{
this.LatestProcessedEtwEventTimestamp = this.tableBackup.LatestBackupTime;
this.ResetMostRecentEtwEventTimestamp();
// Get all files in the ETL directory that match the pattern
Utility.TraceSource.WriteInfo(
TraceType,
"Searching for ETL files whose names match '{0}' in directory '{1}'.",
EtlFilePattern,
this.etlDirectory);
DirectoryInfo dirInfo = new DirectoryInfo(this.etlDirectory);
FileInfo[] etlFiles = dirInfo.GetFiles(EtlFilePattern);
Utility.TraceSource.WriteInfo(
TraceType,
"Found {0} ETL files whose names match '{1}' in directory '{2}'.",
etlFiles.Length,
EtlFilePattern,
this.etlDirectory);
// Sort the files such that the file with the oldest creation
// time comes first.
Array.Sort(etlFiles, this.CompareFileCreationTimesOldFirst);
// We read events that are old enough to have been flushed to disk
var etlFileFlushInterval = this.GetEtlFileFlushInterval();
DateTime endTime = DateTime.UtcNow.AddSeconds(-2 * etlFileFlushInterval.TotalSeconds);
foreach (FileInfo etlFile in etlFiles)
{
Utility.TraceSource.WriteInfo(
TraceType,
"Processing ETL file: {0}. Events with timestamp between {1} ({2}) and {3} ({4}) will be read from it.",
etlFile.Name,
this.LatestProcessedEtwEventTimestamp.Timestamp,
this.LatestProcessedEtwEventTimestamp.Timestamp.Ticks,
endTime,
endTime.Ticks);
// Note the timestamp of the event we received most recently before we start
// processing this ETL file. In case we retry the processing of this ETL file,
// we need to revert back to this timestamp.
this.mostRecentEtwEventTimestampBeforeCurrentEtl = this.MostRecentEtwEventTimestamp;
try
{
Utility.PerformWithRetries(
ctx =>
{
// Create a ETL file reader
using (var eventReader = new TraceFileEventReader(etlFile.FullName))
{
var traceSessionMetadata = eventReader.ReadTraceSessionMetadata();
FabricEvents.Events.TraceSessionStats(
traceSessionMetadata.TraceSessionName,
traceSessionMetadata.EventsLostCount,
traceSessionMetadata.StartTime,
traceSessionMetadata.EndTime);
// Register our ETW event processing callback
eventReader.EventRead += this.OnEtwEventReceived;
// Read ETW events from the ETL file
eventReader.ReadEvents(
this.LatestProcessedEtwEventTimestamp.Timestamp,
endTime);
}
},
(object)null,
new RetriableOperationExceptionHandler(this.ReadEventsExceptionHandler));
Utility.TraceSource.WriteInfo(
TraceType,
"Finished processing ETL file: {0}.",
etlFile.Name);
}
catch (Exception e)
{
Utility.TraceSource.WriteExceptionAsError(
TraceType,
e,
"Failed to read some or all of the events from ETL file {0}.",
etlFile.FullName);
}
if (this.Stopping)
{
Utility.TraceSource.WriteInfo(
TraceType,
"The DCA is stopping, so no more ETL files will be processed.");
break;
}
}
// Update the timestamp up to which ETW events can be read
Utility.ApplicationEtwTracesEndTime = this.LatestProcessedEtwEventTimestamp.Timestamp;
// Schedule the next pass, unless the DCA is being stopped
this.etlReadTimer.Start(this.GetEtlReadInterval());
}
private void RemoveServicePackage(
string nodeName,
string applicationInstanceId,
string servicePackageName,
EtwEventTimestamp dataTimestamp,
bool updateBackupFile,
bool removeDueToInactivity)
{
try
{
// Check if the service package already exists in the service package table
string uniqueAppId = string.Concat(nodeName, applicationInstanceId);
string uniqueServiceId = string.Concat(uniqueAppId, servicePackageName);
List <ServicePackageTableRecord> records = this.servicePackageTable.GetRecordsForAppInstance(
nodeName,
applicationInstanceId);
ServicePackageTableRecord record = (null == records) ?
null :
records.FirstOrDefault(s => s.ServicePackageName.Equals(
servicePackageName,
StringComparison.Ordinal));
if (null != record)
{
// Service package exists in the service package table
bool skipRemove = false;
if (removeDueToInactivity)
{
// We are removing this service package not because it was explicitly
// deactivated by hosting, but because we recently did not receive any
// notification from hosting that this service package is still active.
// However, if some activity occurred on the service package since our
// last check, then don't remove this service package.
DateTime cutoffTime = DateTime.UtcNow.AddSeconds(-1 * this.maxServicePackageInactiveTimeSeconds);
if (record.LatestNotificationTimestamp.CompareTo(cutoffTime) >= 0)
{
Utility.TraceSource.WriteInfo(
TraceType,
"Skipping removal of entry from service package table because recent activity was detected. Node name: {0}, application instance ID: {1}, service package name: {2}.",
nodeName,
applicationInstanceId,
servicePackageName);
skipRemove = true;
}
}
if (false == skipRemove)
{
if (records.Count > 1)
{
// There are other service packages for this application instance
this.applicationInstanceManager.RemoveServiceFromApplicationInstance(uniqueAppId, servicePackageName);
}
else
{
// This is the last service package for its application instance
// Delete the data collector for this application instance
this.applicationInstanceManager.DeleteApplicationInstance(
uniqueAppId);
}
// Delete the service package information from our table
this.servicePackageTable.RemoveRecord(uniqueServiceId);
Utility.TraceSource.WriteInfo(
TraceType,
"Entry removed from service package table: Node name: {0}, application instance ID: {1}, service package name: {2}.",
nodeName,
applicationInstanceId,
servicePackageName);
}
}
else
{
Utility.TraceSource.WriteInfo(
TraceType,
"Deactivation of unknown service package ignored. Node name: {0}, application instance ID: {1}, service package name: {2}.",
nodeName,
applicationInstanceId,
servicePackageName);
}
}
finally
{
// If necessary, update the backup file on disk to reflect this change
if (updateBackupFile)
{
if (false == this.tableBackup.Update(
this.servicePackageTable.GetAllRecords(),
dataTimestamp))
{
Utility.TraceSource.WriteError(
TraceType,
"Unable to make backup of service package table to a file on disk.");
}
}
}
}
private void AddOrUpdateServicePackage(
string nodeName,
string applicationInstanceId,
DateTime servicePackageActivationTime,
string servicePackageName,
ServicePackageTableRecord serviceRecord,
EtwEventTimestamp dataTimestamp,
bool updateBackupFile)
{
try
{
// Create the object that wraps the application configuration
AppConfig appConfig;
try
{
appConfig = new AppConfig(
nodeName,
serviceRecord.RunLayoutRoot,
applicationInstanceId,
serviceRecord.ApplicationRolloutVersion);
}
catch (InvalidOperationException)
{
return;
}
// Create the object that wraps the service configuration
ServiceConfig serviceConfig;
try
{
serviceConfig = new ServiceConfig(
serviceRecord.RunLayoutRoot,
applicationInstanceId,
servicePackageName,
serviceRecord.ServiceRolloutVersion);
}
catch (InvalidOperationException)
{
return;
}
// Check if the service package already exists in the service package table
string uniqueAppId = string.Concat(nodeName, applicationInstanceId);
string uniqueServiceId = string.Concat(uniqueAppId, servicePackageName);
List <ServicePackageTableRecord> records = this.servicePackageTable.GetRecordsForAppInstance(
nodeName,
applicationInstanceId);
ServicePackageTableRecord record = (null == records) ?
null :
records.FirstOrDefault(s => s.ServicePackageName.Equals(
servicePackageName,
StringComparison.Ordinal));
if (null != record)
{
// Service package already exists. Check if needs to be updated.
if ((false == record.ApplicationRolloutVersion.Equals(serviceRecord.ApplicationRolloutVersion)) ||
(false == record.ServiceRolloutVersion.Equals(serviceRecord.ServiceRolloutVersion)))
{
this.applicationInstanceManager.AddServiceToApplicationInstance(
uniqueAppId,
appConfig,
servicePackageName,
serviceConfig);
}
else
{
Utility.TraceSource.WriteInfo(
TraceType,
"Service package activation did not require the data collector to be restarted. Node name: {0}, application instance ID: {1}, app rollout version: {2}, service package name: {3}, service rollout version: {4}.",
nodeName,
applicationInstanceId,
serviceRecord.ApplicationRolloutVersion,
servicePackageName,
serviceRecord.ServiceRolloutVersion);
}
}
else
{
// Service package does not exist yet. Check whether any other service packages
// exist for the same app instance
if (records.Count > 0)
{
// Other service packages exist for this application instance.
this.applicationInstanceManager.AddServiceToApplicationInstance(
uniqueAppId,
appConfig,
servicePackageName,
serviceConfig);
}
else
{
// No service packages exist for this application instance.
// Create a new data collector for this application instance.
this.applicationInstanceManager.CreateApplicationInstance(
uniqueAppId,
servicePackageActivationTime,
appConfig,
servicePackageName,
serviceConfig);
}
}
// Store information about this service package in our table
this.servicePackageTable.AddOrUpdateRecord(uniqueServiceId, serviceRecord);
}
finally
{
// If necessary, update the backup file on disk to reflect this change
if (updateBackupFile)
{
if (false == this.tableBackup.Update(
this.servicePackageTable.GetAllRecords(),
dataTimestamp))
{
Utility.TraceSource.WriteError(
TraceType,
"Unable to make backup of service package table to a file on disk.");
}
}
}
Utility.TraceSource.WriteInfo(
TraceType,
"Entry added to/updated in service package table: Node name: {0}, application instance ID: {1}, app rollout version: {2}, service package name: {3}, service rollout version: {4}.",
nodeName,
applicationInstanceId,
serviceRecord.ApplicationRolloutVersion,
servicePackageName,
serviceRecord.ServiceRolloutVersion);
}
