internal void AddOrUpdateRecord(string tableKey, ServicePackageTableRecord record)
{
lock (this.table)
{
record.LatestNotificationTimestamp = DateTime.UtcNow;
this.table[tableKey] = record;
}
}
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 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 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);
}