public static IReadOnlyLogEntry GetEntry(this ILogSource logSource, LogLineIndex sourceIndex, IEnumerable <IColumnDescriptor> columns)
{
var buffer = new LogBufferArray(1, columns);
logSource.GetEntries(new LogSourceSection(sourceIndex, 1), buffer);
return(buffer[0]);
}
public static IReadOnlyLogEntry GetEntry(this ILogSource logSource, LogLineIndex sourceIndex)
{
var buffer = new LogBufferArray(1, logSource.Columns);
logSource.GetEntries(new LogSourceSection(sourceIndex, 1), buffer);
return(buffer[0]);
}
public static IReadOnlyLogBuffer GetEntries(this ILogSource logSource, IReadOnlyList <LogLineIndex> sourceIndices)
{
var buffer = new LogBufferArray(sourceIndices.Count, logSource.Columns);
GetEntries(logSource, sourceIndices, buffer);
return(buffer);
}
public static IReadOnlyLogBuffer GetEntries(this ILogSource logSource, IReadOnlyList <LogLineIndex> sourceIndices, IEnumerable <IColumnDescriptor> columns)
{
var buffer = new LogBufferArray(sourceIndices.Count, columns);
logSource.GetEntries(sourceIndices, buffer);
return(buffer);
}
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 void Append(LogSourceSection section)
{
var buffer = new LogBufferArray(section.Count, Core.Columns.Index, Core.Columns.Timestamp, Core.Columns.LogLevel);
_source.GetEntries(section, buffer);
lock (_syncRoot)
{
for (var i = 0; i < section.Count; ++i)
{
var line = buffer[i];
if (_currentLogEntry.EntryIndex.IsInvalid ||
!AppendToCurrentLogEntry(line))
{
_currentLogEntry = _currentLogEntry.NextEntry(line.Index);
}
_indices.Add(_currentLogEntry);
}
}
_currentSourceIndex += section.Count;
_fullSourceSection = new LogSourceSection(0, _currentSourceIndex.Value);
}
public static IReadOnlyLogBuffer GetEntries(this ILogSource logSource, IReadOnlyList <IColumnDescriptor> columns)
{
var count = logSource.GetProperty(Properties.LogEntryCount);
var buffer = new LogBufferArray(count, columns);
GetEntries(logSource, new LogSourceSection(0, count), buffer);
return(buffer);
}
/// <summary>
/// Returns a new log buffer which acts as a view onto the original buffer.
/// If the original buffer ONLY contains the desired column, then the original buffer is returned.
/// Otherwise a new temporary buffer is returned with the same size as the original buffer containing
/// only the given column.
/// </summary>
/// <param name="that"></param>
/// <param name="column"></param>
/// <returns></returns>
public static ILogBuffer CreateViewOnlyWithColumn(this ILogBuffer that, IColumnDescriptor column)
{
if (that.Columns.Count == 1 && that.Contains(column))
{
return(that);
}
var temporaryBuffer = new LogBufferArray(that.Count, column);
return(temporaryBuffer);
}
public Page(int index, int pageSize, IReadOnlyList <IColumnDescriptor> columns, IReadOnlyList <IColumnDescriptor> copiedColumns)
{
_index = index;
_pageSize = pageSize;
_copiedColumns = copiedColumns;
_section = new LogSourceSection(index * pageSize, pageSize);
_buffer = new LogBufferArray(pageSize, columns);
_lastAccessTime = DateTime.MinValue;
_numReads = 0;
_buffer.Fill(PageBufferedLogSource.RetrievalState, RetrievalState.NotInSource, 0, _pageSize);
}
public PageBufferedLogSource(ITaskScheduler taskScheduler, ILogSource source, TimeSpan maximumWaitTime, IReadOnlyList <IColumnDescriptor> nonCachedColumns, int pageSize = DefaultPageSize, int maxNumPages = DefaultMaxPageCount)
{
_syncRoot = new object();
_taskScheduler = taskScheduler;
_source = source;
_maxNumPages = maxNumPages;
_listeners = new ProxyLogListenerCollection(source, this);
_cachedColumns = source.Columns.Except(nonCachedColumns).ToList();
_buffer = new PagedLogBuffer(pageSize, maxNumPages, _cachedColumns);
_fetchQueue = new ConcurrentQueue <LogSourceSection>();
_source.AddListener(this, maximumWaitTime, pageSize);
_fetchBuffer = new LogBufferArray(pageSize, _cachedColumns);
_fetchTask = _taskScheduler.StartPeriodic(FetchPagesFromSource, maximumWaitTime);
}
public LogSourcePropertyAdorner(ITaskScheduler scheduler, ILogSource source, TimeSpan maximumWaitTime, IReadOnlyList <IReadOnlyPropertyDescriptor> adornedProperties)
: base(scheduler)
{
_source = source;
_maximumWaitTime = maximumWaitTime;
_adornedProperties = adornedProperties;
_propertiesBuffer = new PropertiesBufferList(_adornedProperties);
_properties = new ConcurrentPropertiesList(_adornedProperties);
_pendingSections = new ConcurrentQueue <LogSourceModification>();
_requiredColumns = GetColumnsRequiredFor(_adornedProperties);
const int bufferSize = 1000;
_buffer = new LogBufferArray(bufferSize, _requiredColumns);
_source.AddListener(this, maximumWaitTime, bufferSize);
StartTask();
}
/// <summary>
///
/// </summary>
/// <param name="taskScheduler"></param>
/// <param name="source"></param>
/// <param name="columnsToFetch"></param>
/// <param name="overwrittenProperties"></param>
/// <param name="maximumWaitTime"></param>
/// <param name="maxEntryCount"></param>
protected AbstractProcessingLogSource(ITaskScheduler taskScheduler,
ILogSource source,
IReadOnlyList <IColumnDescriptor> columnsToFetch,
IReadOnlyList <IReadOnlyPropertyDescriptor> overwrittenProperties,
TimeSpan maximumWaitTime,
int maxEntryCount = 1000)
: base(taskScheduler)
{
_fetchBuffer = new LogBufferArray(maxEntryCount, columnsToFetch);
_pendingSections = new ConcurrentQueue <LogSourceModification>();
_source = source;
_maximumWaitTime = maximumWaitTime;
_maxEntryCount = maxEntryCount;
_propertiesBuffer = new PropertiesBufferList();
_propertiesBufferView = new PropertiesBufferHidingView(_propertiesBuffer, overwrittenProperties);
_properties = new ConcurrentPropertiesList();
}
/// <summary>
/// Returns a new log buffer which acts as a view onto the original buffer.
/// If the original buffer already contains the desired column, then the original buffer is returned.
/// If it does not, then an additional temporary buffer of equal length is created which
/// holds data for the given <paramref name="columns"/> and the returned buffer combines both the
/// <paramref name="that" /> as well as the temporary buffer into one view.
/// </summary>
/// <remarks>
/// This method exists for those cases, where, in order to fulfill a certain <see cref="ILogSource.GetEntries(System.Collections.Generic.IReadOnlyList{LogLineIndex}, ILogBuffer, int, LogSourceQueryOptions)"/>
/// request, one has to make certain to retrieve a particular column from the source. Nothing needs to be done
/// if the caller is also interested in said column, however if the caller is not, then it becomes a one liner
/// to create a combined buffer which acts as a proxy for the original for every column but the desired one,
/// which is copied into an additional buffer.
///
/// If it were permissible to query the source log file countless times, then this method wouldn't need to exist,
/// however since we don't want to do exactly that, we'll have to do this procedure to improve performance, now
/// that log files are streamed into memory on-demand.
/// </remarks>
/// <param name="that"></param>
/// <param name="columns"></param>
/// <returns></returns>
public static ILogBuffer CreateViewWithAdditionalColumns(this ILogBuffer that, IReadOnlyList <IColumnDescriptor> columns)
{
if (columns.Count == 0)
{
return(that);
}
var missingColumns = columns.Except(that.Columns).ToList();
if (missingColumns.Count == 0)
{
return(that);
}
var temporaryBuffer = new LogBufferArray(that.Count, missingColumns);
var combinedView = new CombinedLogBufferView(new[] { that, temporaryBuffer });
return(combinedView);
}
/// <inheritdoc />
public void GetEntries(IReadOnlyList <LogLineIndex> sourceIndices,
ILogBuffer destination,
int destinationIndex,
LogSourceQueryOptions queryOptions)
{
var source = _source;
if (source != null)
{
var columnsToCopy = new IColumnDescriptor[] { Core.Columns.Index, Core.Columns.RawContent };
var tmp = new LogBufferArray(sourceIndices.Count, columnsToCopy);
source.GetEntries(sourceIndices, tmp, 0, queryOptions);
foreach (var column in columnsToCopy)
{
if (destination.Contains(column))
{
destination.CopyFrom(column, destinationIndex, tmp, new Int32Range(0, sourceIndices.Count));
}
}
for (var i = 0; i < sourceIndices.Count; ++i)
{
var parsedLogEntry = _parser.Parse(tmp[i]);
if (parsedLogEntry != null)
{
destination[destinationIndex + i].CopyFrom(parsedLogEntry);
}
else
{
destination[destinationIndex + i].CopyFrom(_nothingParsed);
}
}
}
else
{
destination.FillDefault(destinationIndex, sourceIndices.Count);
}
}
/// <summary>
/// Initializes this object.
/// </summary>
/// <param name="scheduler"></param>
/// <param name="maximumWaitTime"></param>
/// <param name="source"></param>
/// <param name="logLineFilter"></param>
/// <param name="logEntryFilter"></param>
public FilteredLogSource(ITaskScheduler scheduler,
TimeSpan maximumWaitTime,
ILogSource source,
ILogLineFilter logLineFilter,
ILogEntryFilter logEntryFilter)
: base(scheduler)
{
_source = source ?? throw new ArgumentNullException(nameof(source));
_properties = new ConcurrentPropertiesList(source.Properties);
_propertiesBuffer = new PropertiesBufferList(); //< Will be used as temporary storage to hold the properties from the source
_logLineFilter = logLineFilter ?? new NoFilter();
_logEntryFilter = logEntryFilter ?? new NoFilter();
_pendingModifications = new ConcurrentQueue <LogSourceModification>();
_indices = new List <int>();
_logEntryIndices = new Dictionary <int, int>();
_array = new LogBufferArray(BatchSize, Core.Columns.Minimum);
_lastLogBuffer = new LogBufferList(Core.Columns.Minimum);
_maximumWaitTime = maximumWaitTime;
_source.AddListener(this, maximumWaitTime, BatchSize);
StartTask();
}
public LogEntryAccessor(LogBufferArray array, int index)
{
_array = array ?? throw new ArgumentNullException(nameof(array));
_index = index;
}
