internal static void CopyFile(string source, string destination, bool overwrite, bool compressDestination)
{
string tempArchivePath = string.Empty;
try
{
if (compressDestination)
{
string archiveEntryName = Path.GetFileNameWithoutExtension(destination);
FileCompressor.Compress(source, archiveEntryName, out tempArchivePath);
source = tempArchivePath;
}
CopyFileParameters copyParam = new CopyFileParameters()
{
Source = source,
Destination = destination,
Overwrite = true
};
Utility.PerformIOWithRetries(
CopyFileWorker,
(object)copyParam);
}
finally
{
if (false == string.IsNullOrEmpty(tempArchivePath))
{
Utility.PerformIOWithRetries(
() => { FabricFile.Delete(tempArchivePath); });
}
}
}
internal void Close()
{
try
{
Utility.PerformIOWithRetries(
() =>
{
try
{
this.fileStream.Dispose();
}
catch (System.Text.EncoderFallbackException)
{
// This can happen if the manifest file does not match the binary.
// Write an error message and move on.
this.traceSource.WriteError(
this.logSourceId,
"EncoderFallbackException occurred while closing file {0}",
this.TempFileName);
}
});
}
catch (Exception e)
{
this.traceSource.WriteExceptionAsError(
this.logSourceId,
e,
"Failed to close handle to temporary file {0}.",
this.TempFileName);
}
}
internal void Initialize()
{
this.tempFileName = Utility.GetTempFileName();
FileStream tmpFileStream = FabricFile.Open(this.tempFileName, FileMode.Create, FileAccess.Write);
#if !DotNetCoreClrLinux
Helpers.SetIoPriorityHint(tmpFileStream.SafeFileHandle, Kernel32Types.PRIORITY_HINT.IoPriorityHintVeryLow);
#endif
this.fileStream = new StreamWriter(tmpFileStream);
this.writeStatistics = new Statistics();
}
internal void Delete()
{
try
{
Utility.PerformIOWithRetries(
() =>
{
FabricFile.Delete(this.TempFileName);
});
}
catch (Exception e)
{
this.traceSource.WriteExceptionAsError(
this.logSourceId,
e,
"Failed to delete temporary file {0}.",
this.TempFileName);
}
}
internal static void GetFilesMatchingPattern(string directory, string pattern, out string[] files)
{
PatternMatchingParameters patternMatchingParam = new PatternMatchingParameters
{
Directory = directory,
Pattern = pattern
};
Utility.PerformIOWithRetries(
ctx =>
{
PatternMatchingParameters param = ctx;
param.Files = FabricDirectory.GetFiles(
param.Directory,
param.Pattern);
},
patternMatchingParam);
files = patternMatchingParam.Files;
}
public bool GetLastEndTime(string fileName, out DateTime lastEndTime)
{
lastEndTime = DateTime.MinValue;
var fileParam = new LastEndTimeFileParameters(this.traceSource, this.logSourceId)
{
Fs = null,
FileName = fileName,
Mode = FileMode.Open,
Access = FileAccess.Read
};
// Try to open the file that contains the last ETL read timestamp
try
{
Utility.PerformIOWithRetries(
fileParam.OpenLastEndTimeFile,
EtlInMemoryProducerConstants.MethodExecutionInitialRetryIntervalMs,
EtlInMemoryProducerConstants.MethodExecutionMaxRetryCount,
EtlInMemoryProducerConstants.MethodExecutionMaxRetryIntervalMs);
}
catch (Exception e)
{
this.traceSource.WriteExceptionAsError(
this.logSourceId,
e,
"Failed to open file {0} for read.",
fileName);
return(false);
}
if (null == fileParam.Fs)
{
// File wasn't found. So we'll assume that this is the first
// time that we are attempting to read ETL files.
return(true);
}
try
{
// Read the timestamp from the file
fileParam.Reader = new StreamReader(fileParam.Fs);
try
{
try
{
Utility.PerformIOWithRetries(
fileParam.ReadLastEndTime,
EtlInMemoryProducerConstants.MethodExecutionInitialRetryIntervalMs,
EtlInMemoryProducerConstants.MethodExecutionMaxRetryCount,
EtlInMemoryProducerConstants.MethodExecutionMaxRetryIntervalMs);
}
catch (Exception e)
{
// Abort this ETL processing pass. We'll try again in the next pass.
this.traceSource.WriteExceptionAsError(
this.logSourceId,
e,
"Failed to read last ETL read end time from file {0}.",
fileName);
return(false);
}
}
finally
{
fileParam.Reader.Dispose();
}
}
finally
{
fileParam.Fs.Dispose();
}
// Convert the timestamp from binary to DateTime
lastEndTime = DateTime.FromBinary(fileParam.LastEndTimeLong);
return(true);
}
public bool SetLastEndTime(string fileName, DateTime stopTime)
{
var fileParam = new LastEndTimeFileParameters(this.traceSource, this.logSourceId)
{
Fs = null,
FileName = fileName,
Mode = FileMode.OpenOrCreate,
Access = FileAccess.Write,
// Convert the timestamp from DateTime to binary
LastEndTimeLong = stopTime.ToBinary(),
LastEndTime = stopTime
};
// Open the file that contains the last ETL read timestamp or create
// the file if it doesn't already exist.
try
{
Utility.PerformIOWithRetries(
fileParam.OpenLastEndTimeFile,
EtlInMemoryProducerConstants.MethodExecutionInitialRetryIntervalMs,
EtlInMemoryProducerConstants.MethodExecutionMaxRetryCount,
EtlInMemoryProducerConstants.MethodExecutionMaxRetryIntervalMs);
}
catch (Exception e)
{
this.traceSource.WriteExceptionAsError(
this.logSourceId,
e,
"Failed to open file {0} for write.",
fileName);
return(false);
}
try
{
// Write the time stamp to the file
fileParam.Writer = new StreamWriter(fileParam.Fs);
try
{
try
{
Utility.PerformIOWithRetries(
fileParam.WriteLastEndTime,
EtlInMemoryProducerConstants.MethodExecutionInitialRetryIntervalMs,
EtlInMemoryProducerConstants.MethodExecutionMaxRetryCount,
EtlInMemoryProducerConstants.MethodExecutionMaxRetryIntervalMs);
}
catch (Exception e)
{
this.traceSource.WriteExceptionAsError(
this.logSourceId,
e,
"Failed to write last ETL read end time to file {0}.",
fileName);
return(false);
}
}
finally
{
fileParam.Writer.Dispose();
}
}
finally
{
fileParam.Fs.Dispose();
}
return(true);
}
public bool SetLastEndTime(string lastReadFileName, DateTime stopTime)
{
var fileFullPath = Path.Combine(this.lastEtlFileReadFileDirectoryPath, lastReadFileName);
var fileParam = new LastEndTimeFileParameters(this.traceSource, this.logSourceId)
{
Fs = null,
FileName = fileFullPath,
Mode = FileMode.OpenOrCreate,
Access = FileAccess.Write,
// Convert the timestamp from DateTime to binary
LastEndTimeLong = stopTime.ToBinary(),
LastEndTime = stopTime
};
// Open the file that contains the last ETL read timestamp or create
// the file if it doesn't already exist.
try
{
Utility.PerformIOWithRetries(
fileParam.OpenLastEndTimeFile);
}
catch (Exception e)
{
this.traceSource.WriteExceptionAsError(
this.logSourceId,
e,
"Failed to open file {0} for write.",
fileFullPath);
return(false);
}
try
{
// Write the time stamp to the file
fileParam.Writer = new StreamWriter(fileParam.Fs);
try
{
try
{
Utility.PerformIOWithRetries(
fileParam.WriteLastEndTime);
}
catch (Exception e)
{
this.traceSource.WriteExceptionAsError(
this.logSourceId,
e,
"Failed to write last ETL read end time to file {0}.",
fileFullPath);
return(false);
}
}
finally
{
fileParam.Writer.Dispose();
}
}
finally
{
fileParam.Fs.Dispose();
}
return(true);
}
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);
}
internal void WriteEvent(string eventString)
{
Utility.PerformIOWithRetries(
this.WriteEventWorker,
eventString);
}
