/// <summary>
/// Initializes this text log file.
/// </summary>
/// <param name="taskScheduler"></param>
/// <param name="fileName"></param>
/// <param name="format"></param>
/// <param name="encoding"></param>
internal StreamingTextLogSource(ITaskScheduler taskScheduler,
string fileName,
ILogFileFormat format,
Encoding encoding)
{
_taskScheduler = taskScheduler;
_encoding = encoding;
_listeners = new LogSourceListenerCollection(this);
_sourceDoesNotExist = new SourceDoesNotExist(fileName);
_sourceCannotBeAccessed = new SourceCannotBeAccessed(fileName);
_fileName = fileName ?? throw new ArgumentNullException(nameof(fileName));
_index = new LogBufferList(StreamingTextLogSource.LineOffsetInBytes);
_propertiesBuffer = new PropertiesBufferList();
_propertiesBuffer.SetValue(Core.Properties.Name, _fileName);
_propertiesBuffer.SetValue(Core.Properties.Format, format);
_propertiesBuffer.SetValue(TextProperties.RequiresBuffer, true);
_propertiesBuffer.SetValue(TextProperties.LineCount, 0);
_properties = new ConcurrentPropertiesList(Core.Properties.Minimum);
SynchronizeProperties();
_cancellationTokenSource = new CancellationTokenSource();
_columns = new IColumnDescriptor[] { Core.Columns.Index, StreamingTextLogSource.LineOffsetInBytes, Core.Columns.RawContent };
_pendingReadRequests = new ConcurrentQueue <IReadRequest>();
_fileScanTask = _taskScheduler.StartPeriodic(() => RunFileScan(_cancellationTokenSource.Token));
_fileReadTask = _taskScheduler.StartPeriodic(() => RunFileRead(_cancellationTokenSource.Token));
}
public FileLogSource(IServiceContainer services, string fileName, TimeSpan maximumWaitTime)
: base(services.Retrieve <ITaskScheduler>())
{
_syncRoot = new object();
_filesystem = services.Retrieve <IFilesystem>();
_services = services;
_fullFilename = Path.IsPathRooted(fileName)
? fileName
: Path.Combine(Directory.GetCurrentDirectory(), fileName);
_maximumWaitTime = maximumWaitTime;
_sourceDoesNotExist = new SourceDoesNotExist(fileName);
_sourceCannotBeAccessed = new SourceCannotBeAccessed(fileName);
var formatMatcher = services.Retrieve <ILogFileFormatMatcher>();
_encodingDetector = new EncodingDetector();
_formatDetector = new FileFormatDetector(formatMatcher);
_buffer = new LogBufferArray(MaximumLineCount, Core.Columns.RawContent);
_pendingSections = new ConcurrentQueue <KeyValuePair <ILogSource, LogSourceModification> >();
_propertiesBuffer = new PropertiesBufferList();
_propertiesBuffer.SetValue(Core.Properties.Name, _fullFilename);
_properties = new ConcurrentPropertiesList();
StartTask();
}
private Stream TryOpenRead(string fileName, out IEmptyReason error)
{
try
{
error = null;
return(_filesystem.Open(fileName, FileMode.Open, FileAccess.Read,
FileShare.ReadWrite | FileShare.Delete));
}
catch (FileNotFoundException e)
{
error = _sourceDoesNotExist;
Log.Debug(e);
}
catch (DirectoryNotFoundException e)
{
error = _sourceDoesNotExist;
Log.Debug(e);
}
catch (UnauthorizedAccessException e)
{
error = _sourceCannotBeAccessed;
Log.Debug(e);
}
catch (IOException e)
{
error = _sourceCannotBeAccessed;
Log.Debug(e);
}
return(null);
}
private void SetError(IEmptyReason emptyReason)
{
_propertiesBuffer.SetValue(Core.Properties.Format, null);
_propertiesBuffer.SetValue(TextProperties.ByteOrderMark, null);
_propertiesBuffer.SetValue(TextProperties.AutoDetectedEncoding, null);
_propertiesBuffer.SetValue(TextProperties.Encoding, null);
_propertiesBuffer.SetValue(TextProperties.MaxCharactersInLine, _maxCharactersInLine = 0);
_propertiesBuffer.SetValue(Core.Properties.EmptyReason, emptyReason);
_propertiesBuffer.SetValue(Core.Properties.Created, _lastFingerprint?.Created);
_propertiesBuffer.SetValue(Core.Properties.LastModified, _lastFingerprint?.LastModified);
}
private void SetError(IEmptyReason emptyReason)
{
_propertiesBuffer.SetValue(Core.Properties.EmptyReason, emptyReason);
_propertiesBuffer.SetValue(Core.Properties.Created, null);
_propertiesBuffer.SetValue(Core.Properties.Size, null);
_propertiesBuffer.SetValue(Core.Properties.PercentageProcessed, Percentage.HundredPercent);
_propertiesBuffer.SetValue(Core.Properties.LastModified, null);
_propertiesBuffer.SetValue(Core.Properties.Created, null);
_propertiesBuffer.SetValue(Core.Properties.Size, null);
_propertiesBuffer.SetValue(TextProperties.LineCount, 0);
_propertiesBuffer.SetValue(Core.Properties.LogEntryCount, 0);
ResetIndex();
}
/// <summary>
/// Initializes this text log file.
/// </summary>
/// <param name="filesystem"></param>
/// <param name="taskScheduler"></param>
/// <param name="fileName"></param>
/// <param name="format"></param>
/// <param name="encoding"></param>
internal TextLogSource(IFilesystem filesystem,
ITaskScheduler taskScheduler,
string fileName,
ILogFileFormat format,
Encoding encoding)
: base(taskScheduler)
{
_filesystem = filesystem;
_fileName = fileName ?? throw new ArgumentNullException(nameof(fileName));
_encoding = encoding ?? throw new ArgumentNullException(nameof(encoding));
_entries = new LogBufferList(Core.Columns.RawContent);
_columns = new IColumnDescriptor[]
{
Core.Columns.Index,
Core.Columns.OriginalIndex,
Core.Columns.LogEntryIndex,
Core.Columns.LineNumber,
Core.Columns.OriginalLineNumber,
Core.Columns.OriginalDataSourceName,
Core.Columns.RawContent,
PageBufferedLogSource.RetrievalState
};
_sourceDoesNotExist = new SourceDoesNotExist(fileName);
_sourceCannotBeAccessed = new SourceCannotBeAccessed(fileName);
_localProperties = new PropertiesBufferList(Core.Properties.Minimum);
_localProperties.SetValue(Core.Properties.Name, _fileName);
_localProperties.Add(TextProperties.LineCount);
_localProperties.SetValue(Core.Properties.Format, format);
_localProperties.SetValue(TextProperties.LineCount, 0);
_localProperties.SetValue(TextProperties.RequiresBuffer, false);
_properties = new ConcurrentPropertiesList(Core.Properties.Minimum);
SynchronizePropertiesWithUser();
_syncRoot = new object();
_properties.SetValue(TextProperties.AutoDetectedEncoding, encoding);
Log.DebugFormat("Log File '{0}' is interpreted using {1}", _fileName, _encoding.EncodingName);
StartTask();
}
private void SetError(IEmptyReason emptyReason)
{
_localProperties.SetValue(Core.Properties.EmptyReason, emptyReason);
SynchronizePropertiesWithUser();
SetEndOfSourceReached();
}
