Swarm/DysonNetwork.Sphere/Storage/FlushBufferService.cs

66 lines
1.5 KiB
C#

using System.Collections.Concurrent;
namespace DysonNetwork.Sphere.Storage;
public interface IFlushHandler<T>
{
Task FlushAsync(IReadOnlyList<T> items);
}
public class FlushBufferService
{
private readonly Dictionary<Type, object> _buffers = new();
private readonly Lock _lockObject = new();
private ConcurrentQueue<T> _GetOrCreateBuffer<T>()
{
var type = typeof(T);
lock (_lockObject)
{
if (!_buffers.TryGetValue(type, out var buffer))
{
buffer = new ConcurrentQueue<T>();
_buffers[type] = buffer;
}
return (ConcurrentQueue<T>)buffer;
}
}
public void Enqueue<T>(T item)
{
var buffer = _GetOrCreateBuffer<T>();
buffer.Enqueue(item);
}
public async Task FlushAsync<T>(IFlushHandler<T> handler)
{
var buffer = _GetOrCreateBuffer<T>();
var workingQueue = new List<T>();
while (buffer.TryDequeue(out var item))
{
workingQueue.Add(item);
}
if (workingQueue.Count == 0)
return;
try
{
await handler.FlushAsync(workingQueue);
}
catch (Exception)
{
// If flush fails, re-queue the items
foreach (var item in workingQueue)
buffer.Enqueue(item);
throw;
}
}
public int GetPendingCount<T>()
{
var buffer = _GetOrCreateBuffer<T>();
return buffer.Count;
}
}