public static void StartWatcher(WatcherType watcherType, FileWatchConfiguration fileWatchConfiguration,
IStreamReader streamReader, ISleeper sleeper)
{
var watcher = CreateWatcherInternal(watcherType, streamReader, sleeper);
watcher.Configuration = fileWatchConfiguration;
AddWatcherToPool(watcher);
watcher.Start();
}
private void SetStreamPosition(FileWatchConfiguration conf)
{
if (conf.NumberOfLinesToOutputWhenWatchingStarts < 1) return;
var lineNumberToStartTailingFrom = File.ReadLines(conf.FileName).Count() -
conf.NumberOfLinesToOutputWhenWatchingStarts;
if (lineNumberToStartTailingFrom <= 0) return;
var index = 1;
while (_streamReader.ReadLine() != null)
{
if (lineNumberToStartTailingFrom == index) break;
index++;
}
}
public string GetLastLinesFromFile(FileWatchConfiguration conf)
{
_streamReader = new StreamReader(new FileStream(conf.FileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite));
SetStreamPosition(conf);
return _streamReader.ReadToEnd();
}
private static FileWatchConfiguration TailOptionsToFileWatchConfiguration(TailOptions options)
{
var assertionResult = AssertFileExists(options);
if (!assertionResult.FileExists)
{
System.Console.WriteLine(assertionResult.AssertionFailedReason);
Environment.Exit(0);
}
var conf = new FileWatchConfiguration
{
PollIntervalInMs = (int) options.SleepIntervalInSeconds*1000,
Observer = new ConsoleObserver(),
FileName = options.Filename.First(),
NumberOfLinesToOutputWhenWatchingStarts = options.Lines
};
if (!string.IsNullOrWhiteSpace(options.InclusionFilter))
{
conf.WatchFilter = new WatchFilter
{
InclusionFilter = new Filter
{
SimpleFilter = options.InclusionFilter
}
};
}
if (!string.IsNullOrWhiteSpace(options.ExclusionFilter))
{
conf.WatchFilter = new WatchFilter
{
ExclusionFilter = new Filter
{
SimpleFilter = options.ExclusionFilter
}
};
}
return conf;
}
