void CheckForIncompleteJournalRotation(string baseFileName, int currentMemTableVersion)
{
int previousMemTableVersion = currentMemTableVersion - 1;
if (File.Exists(Config.JournalFile(baseFileName, previousMemTableVersion))) // Is there a left-over journal from a previous rotation that was aborted while in rotation?
{
var memTable = new JournaledMemTable(baseFileName, previousMemTableVersion);
memTable.WriteToSortedBlockTable(_manifest);
memTable.Close();
}
}
// Rotates the mem table.
public void RotateMemTable()
{
lock (memTableRotationLock) {
if (_currentJournaledMemTable.Full) // Double check the flag in case we have multiple threads that make it into this routine.
{
_rotationSemaphore.WaitOne(); // Wait for the rotation gate to be open, and automatically reset once a single thread gets through.
_rotatedJournaledMemTable = Interlocked.Exchange <JournaledMemTable> (ref _currentJournaledMemTable, new JournaledMemTable(_manifest.BaseFileName, _manifest.NextVersion(0)));
ThreadPool.QueueUserWorkItem((o) => {
try {
_rotatedJournaledMemTable.WriteToSortedBlockTable(_manifest);
_rotatedJournaledMemTable = null;
} finally {
_rotationSemaphore.Release(); // Open the gate for the next rotation.
}
});
}
}
}
void CheckForIncompleteJournalRotation(string baseFileName, int currentMemTableVersion)
{
int previousMemTableVersion = currentMemTableVersion - 1;
if (File.Exists (Config.JournalFile (baseFileName, previousMemTableVersion))) { // Is there a left-over journal from a previous rotation that was aborted while in rotation?
var memTable = new JournaledMemTable (baseFileName, previousMemTableVersion);
memTable.WriteToSortedBlockTable (_manifest);
memTable.Close ();
}
}
// Rotates the mem table.
public void RotateMemTable()
{
lock (memTableRotationLock) {
if (_currentJournaledMemTable.Full) { // Double check the flag in case we have multiple threads that make it into this routine.
_rotationSemaphore.WaitOne (); // Wait for the rotation gate to be open, and automatically reset once a single thread gets through.
_rotatedJournaledMemTable = Interlocked.Exchange<JournaledMemTable> (ref _currentJournaledMemTable, new JournaledMemTable (_manifest.BaseFileName, _manifest.NextVersion (0)));
ThreadPool.QueueUserWorkItem ((o) => {
try {
_rotatedJournaledMemTable.WriteToSortedBlockTable (_manifest);
_rotatedJournaledMemTable = null;
} finally {
_rotationSemaphore.Release (); // Open the gate for the next rotation.
}
});
}
}
}