/// <summary>
/// Creates a new log file reader and adds it to the priority's log file enumerator.
/// </summary>
/// <param name="prio">The priority of files to write.</param>
/// <param name="fileName">The name of the log file.</param>
/// <param name="fromFsw">Indicates whether the reader was created from a FileSystemWatcher event.</param>
private void AddNewReader(FieldLogPriority prio, string fileName, bool fromFsw)
{
// Must be within a lock(readerLock)!
FL.Trace("AddNewReader, prio=" + prio + ", fileName=" + Path.GetFileName(fileName) + ", fromFsw=" + fromFsw);
// Reject the new file if it's already in the queue (delayed FSW event after active scan)
if (readers.ContainsKey(prio) &&
readers[prio] != null &&
readers[prio].ContainsFile(fileName))
{
// This file is already current or queued
FL.Checkpoint("This file is already current or queued");
return;
}
var reader = new FieldLogFileReader(fileName, true);
ManualResetEvent h;
if (!prioReadSignals.TryGetValue(prio, out h))
{
h = new ManualResetEvent(false);
prioReadSignals[prio] = h;
}
reader.ReadWaitHandle = h;
if (!readers.ContainsKey(prio) || readers[prio] == null)
{
// This is the first file of this priority
readers[prio] = new FieldLogFileEnumerator(reader);
readers[prio].Error += FieldLogFileEnumerator_Error;
readTasks[(int)prio] = Task <bool> .Factory.StartNew(readers[prio].MoveNext);
// Signal the blocking ReadLogItem method that there's a new reader now
newFilePrioEvent.Set();
}
else
{
// Chain the new reader after the last reader in the queue
readers[prio].Append(reader, fromFsw);
// TODO,DEBUG: What for?
//newFilePrioEvent.Set();
}
}