/// <summary>
/// Initializes a new instance of the <see cref="FileBackedLogMessageCollection"/> class backed by
/// a <see cref="LogFile"/>.
/// </summary>
/// <param name="file">Log file to work on.</param>
/// <exception cref="ArgumentNullException"><paramref name="file"/> is <c>null</c>.</exception>
internal FileBackedLogMessageCollection(LogFile file)
{
LogFile = file ?? throw new ArgumentNullException(nameof(file));
mCacheStartMessageId = LogFile.OldestMessageId;
if (mCacheStartMessageId < 0)
{
mCacheStartMessageId = 0;
}
// populate overview collections
foreach (string name in LogFile.GetLogWriterNames(true))
{
UsedLogWritersWritable.Add(name);
}
foreach (string name in LogFile.GetLogLevelNames(true))
{
UsedLogLevelsWritable.Add(name);
}
foreach (string name in LogFile.GetTags(true))
{
UsedTagsWritable.Add(name);
}
foreach (string name in LogFile.GetApplicationNames(true))
{
UsedApplicationNamesWritable.Add(name);
}
foreach (string name in LogFile.GetProcessNames(true))
{
UsedProcessNamesWritable.Add(name);
}
foreach (int id in LogFile.GetProcessIds())
{
UsedProcessIdsWritable.Add(id);
}
}
/// <summary>
/// Updates the overview collections as the specified message is removed from the collection.
/// </summary>
/// <param name="message">Message that is removed from the collection (null, if all messages are removed).</param>
private void UpdateOverviewCollectionsOnRemove(TMessage message)
{
if (message != null)
{
// unregister a single message
UnregisterForOverviewCollection(message.LogWriterName, mUsedLogWriterCounts, UsedLogWritersWritable);
UnregisterForOverviewCollection(message.LogLevelName, mUsedLogLevelCounts, UsedLogLevelsWritable);
UnregisterForOverviewCollection(message.Tags, mUsedTagsCounts, UsedTagsWritable);
UnregisterForOverviewCollection(message.ApplicationName, mUsedApplicationNameCounts, UsedApplicationNamesWritable);
UnregisterForOverviewCollection(message.ProcessName, mUsedProcessNameCounts, UsedProcessNamesWritable);
UnregisterForOverviewCollection(message.ProcessId, mUsedProcessIdCounts, UsedProcessIdsWritable);
}
else
{
// unregister all messages
mUsedLogWriterCounts.Clear();
mUsedLogLevelCounts.Clear();
mUsedTagsCounts.Clear();
mUsedApplicationNameCounts.Clear();
mUsedProcessNameCounts.Clear();
mUsedProcessIdCounts.Clear();
UsedLogWritersWritable.Clear();
UsedLogLevelsWritable.Clear();
UsedTagsWritable.Clear();
UsedApplicationNamesWritable.Clear();
UsedProcessNamesWritable.Clear();
UsedProcessIdsWritable.Clear();
}
}