public void Truncate()
{
_currentJournaledMemTable.Close();
TableManager.Default.Close(this);
foreach (var pair in _secondaryIndexes)
{
pair.Value.Close(FastClose);
}
string basePath = Path.GetFullPath(Manifest.BaseFileName);
foreach (string file in Directory.GetFiles(basePath, "*.*", SearchOption.AllDirectories))
{
Helper.DeleteFile(file, false, (msg) => { Manifest.LogMessage(msg); });
}
foreach (string dir in Directory.GetDirectories(basePath, "*.*", SearchOption.AllDirectories))
{
Helper.DeleteFolder(dir, false, (msg) => { Manifest.LogMessage(msg); });
}
_manifest = new Manifest(basePath);
_currentJournaledMemTable = new JournaledMemTable(_manifest.BaseFileName, _manifest.CurrentVersion(0));
_cache = new RazorCache();
_secondaryIndexes = new Dictionary <string, KeyValueStore>(StringComparer.OrdinalIgnoreCase);
Manifest.LogMessage("Database Truncated.");
}
public void Close(bool fast = false)
{
// Make sure any inflight rotations have occurred before shutting down.
if (!_rotationSemaphore.WaitOne(30000))
{
throw new TimeoutException("Timed out waiting for table rotation to complete.");
}
// Release again in case another thread tries to close it again.
_rotationSemaphore.Release();
if (!finalizing && !fast)
{
TableManager.Default.Close(this);
}
if (_currentJournaledMemTable != null)
{
_currentJournaledMemTable.Close();
_currentJournaledMemTable = null;
}
if (_secondaryIndexes != null)
{
foreach (var idx in _secondaryIndexes)
{
idx.Value.Close(fast);
}
}
// Don't finalize since we already closed it.
GC.SuppressFinalize(this);
}
#pragma warning restore 420
private void CheckForIncompleteJournalRotation(string baseFileName, int currentMemTableVersion)
{
int previousMemTableVersion = currentMemTableVersion - 1;
// Is there a left-over journal from a previous rotation that was aborted while in rotation.
if (File.Exists(Config.JournalFile(baseFileName, previousMemTableVersion)))
{
var memTable = new JournaledMemTable(baseFileName, previousMemTableVersion);
memTable.WriteToSortedBlockTable(_manifest);
memTable.Close();
}
}
public KeyValueStore(string baseFileName, RazorCache cache) {
if (!Directory.Exists(baseFileName)) {
Directory.CreateDirectory(baseFileName);
}
_manifest = new Manifest(baseFileName);
_manifest.Logger = Config.Logger;
int memTableVersion = _manifest.CurrentVersion(0);
// Check for a previously aborted journal rotation
CheckForIncompleteJournalRotation(baseFileName, memTableVersion);
// Create new journal for this run (and potentially load from disk, if there was data loaded previously)
_currentJournaledMemTable = new JournaledMemTable(_manifest.BaseFileName, memTableVersion);
_cache = cache == null ? new RazorCache() : cache;
}
public KeyValueStore(string baseFileName, RazorCache cache)
{
if (!Directory.Exists(baseFileName))
{
Directory.CreateDirectory(baseFileName);
}
_manifest = new Manifest(baseFileName);
_manifest.Logger = Config.Logger;
int memTableVersion = _manifest.CurrentVersion(0);
// Check for a previously aborted journal rotation
CheckForIncompleteJournalRotation(baseFileName, memTableVersion);
// Create new journal for this run (and potentially load from disk, if there was data loaded previously)
_currentJournaledMemTable = new JournaledMemTable(_manifest.BaseFileName, memTableVersion);
_cache = cache == null ? new RazorCache() : cache;
}
#pragma warning disable 420
public void RotateMemTable()
{
lock (memTableRotationLock) {
// Double check the flag in case we have multiple threads that make it into this routine
if (_currentJournaledMemTable.Full)
{
_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
}
});
}
}
}
public void Truncate() {
_currentJournaledMemTable.Close();
TableManager.Default.Close(this);
foreach (var pair in _secondaryIndexes) {
pair.Value.Close(FastClose);
}
string basePath = Path.GetFullPath(Manifest.BaseFileName);
foreach (string file in Directory.GetFiles(basePath, "*.*", SearchOption.AllDirectories)) {
Helper.DeleteFile(file, false, (msg) => { Manifest.LogMessage(msg); });
}
foreach (string dir in Directory.GetDirectories(basePath, "*.*", SearchOption.AllDirectories)) {
Helper.DeleteFolder(dir, false, (msg) => { Manifest.LogMessage(msg); });
}
_manifest = new Manifest(basePath);
_currentJournaledMemTable = new JournaledMemTable(_manifest.BaseFileName, _manifest.CurrentVersion(0));
_cache = new RazorCache();
_secondaryIndexes = new Dictionary<string, KeyValueStore>(StringComparer.OrdinalIgnoreCase);
Manifest.LogMessage("Database Truncated.");
}
public void Close(bool fast = false) {
// Make sure any inflight rotations have occurred before shutting down.
if (!_rotationSemaphore.WaitOne(30000))
throw new TimeoutException("Timed out waiting for table rotation to complete.");
// Release again in case another thread tries to close it again.
_rotationSemaphore.Release();
if (!finalizing && !fast) {
TableManager.Default.Close(this);
}
if (_currentJournaledMemTable != null) {
_currentJournaledMemTable.Close();
_currentJournaledMemTable = null;
}
if (_secondaryIndexes != null) {
foreach (var idx in _secondaryIndexes) {
idx.Value.Close(fast);
}
}
// Don't finalize since we already closed it.
GC.SuppressFinalize(this);
}
#pragma warning restore 420
private void CheckForIncompleteJournalRotation(string baseFileName, int currentMemTableVersion) {
int previousMemTableVersion = currentMemTableVersion - 1;
// Is there a left-over journal from a previous rotation that was aborted while in rotation.
if (File.Exists(Config.JournalFile(baseFileName, previousMemTableVersion))) {
var memTable = new JournaledMemTable(baseFileName, previousMemTableVersion);
memTable.WriteToSortedBlockTable(_manifest);
memTable.Close();
}
}
#pragma warning disable 420
public void RotateMemTable() {
lock (memTableRotationLock) {
// Double check the flag in case we have multiple threads that make it into this routine
if (_currentJournaledMemTable.Full) {
_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
}
});
}
}
}