public bool Update()
{
using (owner.trace.NewNamedFrame("Updating {0}", this.fileName))
{
CheckDisposed();
try
{
if (simpleMedia == null)
{
owner.trace.Info("SimpleMedia object not created yet. Creating");
simpleMedia = new SimpleFileMedia(
owner.fileSystem,
SimpleFileMedia.CreateConnectionParamsFromFileName(Path.Combine(owner.baseDirectory, FileName))
);
}
owner.trace.Info("Updating simple media");
simpleMedia.Update();
if (!simpleMedia.IsAvailable)
{
owner.trace.Info("File is not avaliable (i.e. has been deleted)");
return(false);
}
if (firstMessageTime == null)
{
owner.trace.Info("First message time is unknown. Calcalating it");
using (IPositionedMessagesReader reader = (IPositionedMessagesReader)Activator.CreateInstance(
owner.logReaderType, new MediaBasedReaderParams(owner.tempThreads, SimpleMedia, owner.tempFilesManager), owner.logFormatInfo))
{
owner.trace.Info("Reader created");
reader.UpdateAvailableBounds(false);
owner.trace.Info("Bounds found");
IMessage first = PositionedMessagesUtils.ReadNearestMessage(reader, reader.BeginPosition);
if (first == null)
{
owner.trace.Warning("No messages found");
return(false);
}
owner.trace.Info("First message: {0} '{1}'", first.Time, first.Text);
firstMessageTime = first.Time;
}
}
owner.trace.Info("Part updated OK");
return(true);
}
catch (Exception e)
{
owner.trace.Error(e, "Failure during part update");
return(false);
}
}
}
static DetectedFormat DetectFormat(
string fileName,
Func <ILogProviderFactory, int> mruIndexGetter,
ILogProviderFactoryRegistry factoriesRegistry,
CancellationToken cancellation,
IFormatAutodetectionProgress progress,
ITempFilesManager tempFilesManager)
{
if (string.IsNullOrEmpty(fileName))
{
throw new ArgumentException("fileName");
}
if (mruIndexGetter == null)
{
throw new ArgumentNullException("mru");
}
var log = LJTraceSource.EmptyTracer;
using (log.NewFrame)
using (SimpleFileMedia fileMedia = new SimpleFileMedia(
SimpleFileMedia.CreateConnectionParamsFromFileName(fileName)))
using (ILogSourceThreads threads = new LogSourceThreads())
{
foreach (ILogProviderFactory factory in GetOrderedListOfRelevantFactories(fileName, mruIndexGetter, factoriesRegistry))
{
log.Info("Trying {0}", factory);
if (progress != null)
{
progress.Trying(factory);
}
if (cancellation.IsCancellationRequested)
{
return(null);
}
try
{
using (var reader = ((IMediaBasedReaderFactory)factory).CreateMessagesReader(
new MediaBasedReaderParams(threads, fileMedia, tempFilesManager, MessagesReaderFlags.QuickFormatDetectionMode)))
{
reader.UpdateAvailableBounds(false);
using (var parser = reader.CreateParser(new CreateParserParams(0, null, MessagesParserFlag.DisableMultithreading, MessagesParserDirection.Forward)))
{
if (parser.ReadNext() != null)
{
log.Info("Autodetected format of {0}: {1}", fileName, factory);
return(new DetectedFormat(factory, ((IFileBasedLogProviderFactory)factory).CreateParams(fileName)));
}
}
}
}
catch (Exception e)
{
log.Error(e, "Failed to load '{0}' as {1}", fileName, factory);
}
}
}
return(null);
}
static async Task <DetectedFormat> DetectFormat(
string fileName,
string loggableName,
Func <ILogProviderFactory, int> mruIndexGetter,
ILogProviderFactoryRegistry factoriesRegistry,
CancellationToken cancellation,
IFormatAutodetectionProgress progress,
ITraceSourceFactory traceSourceFactory,
LogMedia.IFileSystem fileSystem)
{
if (string.IsNullOrEmpty(fileName))
{
throw new ArgumentException("fileName");
}
if (mruIndexGetter == null)
{
throw new ArgumentNullException("mru");
}
Func <Task <SimpleFileMedia> > createFileMedia = () => SimpleFileMedia.Create(fileSystem, SimpleFileMedia.CreateConnectionParamsFromFileName(fileName));
var log = traceSourceFactory.CreateTraceSource("App", string.Format("fdtc.{0}", Interlocked.Increment(ref lastPerfOp)));
using (new Profiling.Operation(log, string.Format("format detection of {0}", loggableName)))
using (ILogSourceThreadsInternal threads = new LogSourceThreads())
using (var localCancellation = CancellationTokenSource.CreateLinkedTokenSource(cancellation))
{
var candidateFactories = GetOrderedListOfRelevantFactories(fileName, mruIndexGetter, factoriesRegistry).ToArray();
var ret = (await Task.WhenAll(candidateFactories.Select((factory, index) => (factory, index)).Select(async candidate =>
{
var(factory, idx) = candidate;
try
{
using (var perfOp = new Profiling.Operation(log, factory.ToString()))
using (var fileMedia = await createFileMedia())
using (var reader = ((IMediaBasedReaderFactory)factory).CreateMessagesReader(
new MediaBasedReaderParams(threads, fileMedia,
MessagesReaderFlags.QuickFormatDetectionMode, parentLoggingPrefix: log.Prefix)))
{
if (progress != null)
{
progress.Trying(factory);
}
if (localCancellation.IsCancellationRequested)
{
perfOp.Milestone("cancelled");
return(fmt: (DetectedFormat)null, idx);
}
await reader.UpdateAvailableBounds(false);
perfOp.Milestone("bounds detected");
var parser = await reader.CreateParser(new CreateParserParams(0, null,
MessagesParserFlag.DisableMultithreading | MessagesParserFlag.DisableDejitter, MessagesParserDirection.Forward));
try
{
if (await parser.ReadNext() != null)
{
log.Info("Autodetected format of {0}: {1}", fileName, factory);
localCancellation.Cancel();
return(fmt: new DetectedFormat(factory, ((IFileBasedLogProviderFactory)factory).CreateParams(fileName)), idx);
}
}
finally
{
await parser.Dispose();
}
}
}
catch (Exception e)
{
log.Error(e, "Failed to load '{0}' as {1}", fileName, factory);
}
return(fmt: (DetectedFormat)null, idx);
}))).Where(x => x.fmt != null).OrderBy(x => x.idx).Select(x => x.fmt).FirstOrDefault();
if (ret != null)
{
return(ret);
}
using (var fileMedia = await createFileMedia())
{
if (!await IOUtils.IsBinaryFile(fileMedia.DataStream))
{
log.Info("File does not look binary");
var factory = factoriesRegistry.Find(
PlainText.Factory.CompanyName, PlainText.Factory.FormatName) as IFileBasedLogProviderFactory;
if (factory != null)
{
log.Info("Fall back to plaintext format");
return(new DetectedFormat(factory, factory.CreateParams(fileName)));
}
}
}
}
return(null);
}
static DetectedFormat DetectFormat(
string fileName,
string loggableName,
Func <ILogProviderFactory, int> mruIndexGetter,
ILogProviderFactoryRegistry factoriesRegistry,
CancellationToken cancellation,
IFormatAutodetectionProgress progress,
ITempFilesManager tempFilesManager)
{
if (string.IsNullOrEmpty(fileName))
{
throw new ArgumentException("fileName");
}
if (mruIndexGetter == null)
{
throw new ArgumentNullException("mru");
}
Func <SimpleFileMedia> createFileMedia = () => new SimpleFileMedia(SimpleFileMedia.CreateConnectionParamsFromFileName(fileName));
var log = new LJTraceSource("App", string.Format("fdtc.{0}", Interlocked.Increment(ref lastPerfOp)));
using (new Profiling.Operation(log, string.Format("format detection of {0}", loggableName)))
using (ILogSourceThreads threads = new LogSourceThreads())
using (var localCancellation = CancellationTokenSource.CreateLinkedTokenSource(cancellation))
{
var ret = GetOrderedListOfRelevantFactories(fileName, mruIndexGetter, factoriesRegistry).AsParallel().Select(factory =>
{
try
{
using (var perfOp = new Profiling.Operation(log, factory.ToString()))
using (var fileMedia = createFileMedia())
using (var reader = ((IMediaBasedReaderFactory)factory).CreateMessagesReader(
new MediaBasedReaderParams(threads, fileMedia, tempFilesManager, MessagesReaderFlags.QuickFormatDetectionMode, parentLoggingPrefix: log.Prefix)))
{
if (progress != null)
{
progress.Trying(factory);
}
if (localCancellation.IsCancellationRequested)
{
perfOp.Milestone("cancelled");
return(null);
}
reader.UpdateAvailableBounds(false);
perfOp.Milestone("bounds detected");
using (var parser = reader.CreateParser(new CreateParserParams(0, null,
MessagesParserFlag.DisableMultithreading | MessagesParserFlag.DisableDejitter, MessagesParserDirection.Forward)))
{
if (parser.ReadNext() != null)
{
log.Info("Autodetected format of {0}: {1}", fileName, factory);
localCancellation.Cancel();
return(new DetectedFormat(factory, ((IFileBasedLogProviderFactory)factory).CreateParams(fileName)));
}
}
}
}
catch (Exception e)
{
log.Error(e, "Failed to load '{0}' as {1}", fileName, factory);
}
return(null);
}).FirstOrDefault(x => x != null);
if (ret != null)
{
return(ret);
}
using (var fileMedia = createFileMedia())
{
if (!IOUtils.IsBinaryFile(fileMedia.DataStream))
{
log.Info("File does not look binary");
var factory = factoriesRegistry.Find(
PlainText.Factory.CompanyName, PlainText.Factory.FormatName) as IFileBasedLogProviderFactory;
if (factory != null)
{
log.Info("Fall back to plaintext format");
return(new DetectedFormat(factory, factory.CreateParams(fileName)));
}
}
}
}
return(null);
}