public void QueueWrite(IPage pageToWrite, ulong transactionId)
{
#if DEBUG_PAGESTORE
Logging.LogDebug("Queue {0}", pageToWrite.Id);
#endif
var writeTask = new WriteTask {PageToWrite = pageToWrite, TransactionId = transactionId};
_writeTasks.AddOrUpdate(pageToWrite.Id, writeTask, (pageId, task) => writeTask);
_writeQueue.Enqueue(pageToWrite.Id);
}
public void QueueWrite(IPage pageToWrite, ulong transactionId)
{
#if DEBUG_PAGESTORE
Logging.LogDebug("Queue {0}", pageToWrite.Id);
#endif
var writeTask = new WriteTask {
PageToWrite = pageToWrite, TransactionId = transactionId
};
_writeTasks.AddOrUpdate(pageToWrite.Id, writeTask, (pageId, task) => writeTask);
_writeQueue.Enqueue(pageToWrite.Id);
}
private void Run(object state)
{
while (!_shutdownRequested)
{
ulong writePageId;
if (_writeQueue.TryDequeue(out writePageId))
{
#if DEBUG_PAGESTORE
Logging.LogDebug("BackgroundWriter: Next page id in queue: {0}", writePageId);
#endif
// Retrieve the page write information from the _writeTasks dictionary
WriteTask writeTask;
if (_writeTasks.TryRemove(writePageId, out writeTask))
{
lock (this)
{
_writing = writeTask;
}
#if DEBUG_PAGESTORE
Logging.LogDebug("BackgroundWriter: Page {0} found in task dictionary.", writePageId);
#endif
try
{
_writing.PageToWrite.Write(_outputStream, _writing.TransactionId);
}
catch (Exception ex)
{
Logging.LogError(BrightstarEventId.StoreBackgroundWriteError,
"Error in BackgroundPageWriter: {0}", ex);
}
finally
{
lock (this)
{
_writing = null;
}
}
}
else
{
#if DEBUG_PAGESTORE
Logging.LogDebug("BackgroundWriter: Page {0} no longer in task dictionary. Skipping.", writePageId);
#endif
}
}
else
{
// Instead of waiting on a event, just spin wait
_shutdownCompleted.WaitOne(1);
}
}
_shutdownCompleted.Set();
}
private void Run(object state)
{
while (!_shutdownRequested)
{
ulong writePageId;
if (_writeQueue.TryDequeue(out writePageId))
{
#if DEBUG_PAGESTORE
Logging.LogDebug("BackgroundWriter: Next page id in queue: {0}", writePageId);
#endif
// Retrieve the page write information from the _writeTasks dictionary
WriteTask writeTask;
if (_writeTasks.TryRemove(writePageId, out writeTask))
{
lock (this)
{
_writing = writeTask;
}
#if DEBUG_PAGESTORE
Logging.LogDebug("BackgroundWriter: Page {0} found in task dictionary.", writePageId);
#endif
try
{
_writing.PageToWrite.Write(_outputStream, _writing.TransactionId);
}
catch (Exception ex)
{
Logging.LogError(BrightstarEventId.StoreBackgroundWriteError,
"Error in BackgroundPageWriter: {0}", ex);
}
finally
{
lock (this)
{
_writing = null;
}
}
}
else
{
#if DEBUG_PAGESTORE
Logging.LogDebug("BackgroundWriter: Page {0} no longer in task dictionary. Skipping.", writePageId);
#endif
}
}
else
{
// Instead of waiting on a event, just spin wait
_shutdownCompleted.WaitOne(1);
}
}
_shutdownCompleted.Set();
}
