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 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 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);
}
