public void AppendAllLines()
{
// Type
var @this = new FileInfo(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Examples_System_IO_FileInfo_AppendAllLines.txt"));
// Intialization
using (FileStream stream = @this.Create())
{
}
// Examples
@this.AppendAllLines(new[] { "Fizz", "Buzz" });
// Unit Test
Assert.AreEqual("Fizz" + Environment.NewLine + "Buzz" + Environment.NewLine, @this.ReadToEnd());
}
internal static void EnumerateOperation <T>(this IEnumerable <T> items,
State state,
string operationName,
Func <T, object> getId,
FileInfo failFile,
CancellationToken cancellationToken,
Action <T> action)
{
getId = getId ?? (item => item);
var etaCalculator = new EtaCalculator(5, maximumDuration: TimeSpan.FromMinutes(2).Ticks, state.TotalCount);
var totalTime = Stopwatch.StartNew();
Logger.Info("begin {operationName} for {count} items", operationName, state.TotalCount);
foreach (var item in items.TakeWhile(i => !state.ShouldQuit && !cancellationToken.IsCancellationRequested))
{
var id = getId(item);
try
{
state.Processed++;
etaCalculator.Increment();
action(item);
Logger.Debug("processed {operationName} for {id}", operationName, id);
}
catch (Exception e)
{
state.Errored++;
Logger.Error(e, "errored {operationName} for {id}", operationName, id);
failFile?.AppendAllLines(id.ToString().ToEnumerable());
}
finally
{
if (state.ShouldReport())
{
if (etaCalculator.TryGetEta(out var etr, out var eta))
{
Logger.Info(new
{
state = new { state.TotalCount, state.Processed, state.Succeeded, state.Errored },
elapsed = totalTime.Elapsed,
etr, eta
});
}
else
{
Logger.Info(new
{
state = new { state.TotalCount, state.Processed, state.Succeeded, state.Errored },
elapsed = totalTime.Elapsed
});
}
}
}
}
Logger.Info(
state.ShouldQuit ? "quit {operationName}" : "completed {operationName}",
operationName);
if (state.Errored == 0)
{
failFile = null;
}
Logger.Info(new
{
state = new { state.TotalCount, state.Processed, state.Succeeded, state.Errored },
elapsed = totalTime.Elapsed,
failFile
});
}