private QueueFileInfo GetStreamInfoFromHandle(QueueStreamHandle handle)
{
QueueFileInfo queueFileInfo;
_files.TryGetValue(handle.Id, out queueFileInfo);
return(queueFileInfo);
}
private void AddHandle(int id, long position, int length)
{
var handle = new QueueStreamHandle(id, position, length);
_recordQueue.Enqueue(handle);
HashSet <QueueStreamHandle> handles;
if (!_recordMap.TryGetValue(id, out handles))
{
handles = new HashSet <QueueStreamHandle>();
_recordMap.Add(id, handles);
}
handles.Add(handle);
}
private void RemoveHandle(QueueStreamHandle handle, QueueFileInfo queueFileInfo)
{
HashSet <QueueStreamHandle> handles;
if (!_recordMap.TryGetValue(handle.Id, out handles))
{
return;
}
handles.Remove(handle);
if (handles.Count != 0)
{
return;
}
_recordMap.Remove(handle.Id);
if (queueFileInfo == _head)
{
// tail caught up with head, so let's truncate the file
queueFileInfo.Stream.SetLength(0);
}
else
{
// no undeleted records in non-head file, remove file
RemoveFile(queueFileInfo);
}
if (_head.Id == 1 || _recordQueue.Count > 0)
{
return;
}
if (_recordMap.Count > 0)
{
return;
}
// the head is not the first file and there are no remaining items, so we can reset the head to the first file
RemoveFile(_head);
CreateHead(1);
}
private void RemoveHandle(QueueStreamHandle handle, QueueFileInfo queueFileInfo)
{
HashSet<QueueStreamHandle> handles;
if(!_recordMap.TryGetValue(handle.Id, out handles)) {
return;
}
handles.Remove(handle);
if(handles.Count != 0) {
return;
}
_recordMap.Remove(handle.Id);
if(queueFileInfo == _head) {
// tail caught up with head, so let's truncate the file
queueFileInfo.Stream.SetLength(0);
} else {
// no undeleted records in non-head file, remove file
RemoveFile(queueFileInfo);
}
if(_head.Id == 1 || _recordQueue.Count > 0) {
return;
}
if(_recordMap.Count > 0) {
return;
}
// the head is not the first file and there are no remaining items, so we can reset the head to the first file
RemoveFile(_head);
CreateHead(1);
}
private QueueFileInfo GetStreamInfoFromHandle(QueueStreamHandle handle)
{
QueueFileInfo queueFileInfo;
_files.TryGetValue(handle.Id, out queueFileInfo);
return queueFileInfo;
}
private void AddHandle(int id, long position, int length)
{
var handle = new QueueStreamHandle(id, position, length);
_recordQueue.Enqueue(handle);
HashSet<QueueStreamHandle> handles;
if(!_recordMap.TryGetValue(id, out handles)) {
handles = new HashSet<QueueStreamHandle>();
_recordMap.Add(id, handles);
}
handles.Add(handle);
}
