public static PerformanceStats From(IndexingOperation name, long durationMs)
{
return(new PerformanceStats
{
Name = name,
DurationMs = durationMs
});
}
private void EnqueueIndexingOperation(ModelObject modelObject, IndexingOperation indexingOperation)
{
lock (this.indexingQueue)
{
IndexingOperation pendingOperation;
if (this.indexingQueue.TryGetValue(modelObject, out pendingOperation))
{
if (indexingOperation != pendingOperation)
{
this.indexingQueue.Remove(modelObject);
}
}
else
{
this.indexingQueue.Add(modelObject, indexingOperation);
}
}
this.Status = IndexingStatus.Indexing;
this.queueResetEvent.Set();
}
public static PerformanceStats From(IndexingOperation name, long durationMs)
{
return new PerformanceStats
{
Name = name,
DurationMs = durationMs
};
}
// Starts a new thread that continuously indexes new search items
// as they become available
private void BeginIndexing()
{
// An anonymous method that loops and does the
// indexing when appropriate
ThreadStart index = delegate
{
while (true)
{
// Wait if there is no work to do
this.queueResetEvent.WaitOne();
// Get the next indexing operation, if one is available
ModelObject modelObject = null;
IndexingOperation indexingOperation = IndexingOperation.Register;
lock (this.indexingQueue)
{
// If there are no indexing operations available, set
// the status to ready and wait for more work
if (this.indexingQueue.Count == 0)
{
this.Status = IndexingStatus.Ready;
this.queueResetEvent.Reset();
continue;
}
// Otherwise, dequeue the next work item
else
{
foreach (KeyValuePair <ModelObject, IndexingOperation> entry in this.indexingQueue)
{
modelObject = entry.Key;
indexingOperation = entry.Value;
break;
}
if (modelObject != null)
{
this.indexingQueue.Remove(modelObject);
}
}
}
// Process the indexing operation
if (modelObject != null)
{
if (indexingOperation == IndexingOperation.Register)
{
this.RegisterModelObject(modelObject);
}
else if (indexingOperation == IndexingOperation.Unregister)
{
this.UnregisterModelObject(modelObject);
}
}
}
};
// Create a new thread and start the indexing loop
Thread thread = new Thread(index);
thread.Name = "Search Engine Indexer";
thread.IsBackground = true;
thread.Priority = ThreadPriority.BelowNormal;
thread.Start();
}
