/// <summary>
/// Write values from the given log entry to the stream
/// </summary>
/// <param name="row">collection of columns, values, and conversions</param>
public void LogEntry(ILogRow row)
{
int extraColumns = 0;
if (this.insertTimeColumns)
{
extraColumns = 2;
}
string[] values = new string[row.ColumnCount + extraColumns];
if (this.insertTimeColumns)
{
TimeSpan elapsedTime = DateTime.Now.Subtract(this.startTime);
values[0] = ((int)elapsedTime.TotalMilliseconds).ToString(CultureInfo.InvariantCulture);
values[1] = DateTime.Now.ToString("yyyy-MM-dd T HH:mm:ss:fff", CultureInfo.InvariantCulture);
}
int i = extraColumns;
for (int index = 0; index < row.ColumnCount; index++)
{
values[i] = row.GetColumnValueAsString(index);
i++;
}
string entry = string.Join(", ", values);
writer.WriteLine(entry);
}
/// <summary>
/// Write the names of the colums
/// </summary>
/// <param name="row">collection of columns, values, and conversions</param>
public void LogStart(ILogRow row)
{
this.startTime = DateTime.Now;
int extraColumns = 0;
if (this.insertTimeColumns)
{
extraColumns = 2;
}
string[] names = new string[row.ColumnCount + extraColumns];
if (this.insertTimeColumns)
{
names[0] = "Time";
names[1] = "Clock";
}
int i = extraColumns;
for (int index = 0; index < row.ColumnCount; index++)
{
names[i] = row.GetColumnName(index);
i++;
}
string header = string.Join(", ", names);
writer.WriteLine(header);
}
/// <summary>
/// Create and dispose log writer as necessary
/// </summary>
/// <param name="row">row of data from the SSM interface</param>
/// <returns>true if </returns>
private bool ManageWriterState(LogRow row)
{
if (this.ShouldLog(row))
{
if (this.writer == null)
{
this.writer = this.factory();
if (this.queue.Count == 0)
{
this.writer.LogStart(row);
}
else
{
ILogRow first = this.queue.Dequeue();
this.writer.LogStart(first);
this.writer.LogEntry(first);
while (this.queue.Count > 0)
{
this.writer.LogEntry(this.queue.Dequeue());
}
}
}
return(true);
}
else
{
// Keep the values from the most recent N rows in the queue for later replay.
this.queue.Enqueue(new HistoryRow(row));
if (this.queue.Count > extraRows)
{
this.queue.Dequeue();
}
this.SafelyDisposeWriter();
return(false);
}
}
