BulkheadPolicy
A bulkhead-isolation policy which can be applied to delegates.
using Polly.Utilities;
using System;
using System.Threading;
using System.Threading.Tasks;
namespace Polly.Bulkhead
{
public class BulkheadPolicy : Policy, IBulkheadPolicy, IsPolicy, IDisposable
{
private readonly SemaphoreSlim _maxParallelizationSemaphore;
private readonly SemaphoreSlim _maxQueuedActionsSemaphore;
private readonly int _maxParallelization;
private readonly int _maxQueueingActions;
public int BulkheadAvailableCount => _maxParallelizationSemaphore.CurrentCount;
public int QueueAvailableCount => Math.Min(_maxQueuedActionsSemaphore.CurrentCount, _maxQueueingActions);
internal BulkheadPolicy(Action<Action<Context, CancellationToken>, Context, CancellationToken> exceptionPolicy, int maxParallelization, int maxQueueingActions, SemaphoreSlim maxParallelizationSemaphore, SemaphoreSlim maxQueuedActionsSemaphore)
: base(exceptionPolicy, PredicateHelper.EmptyExceptionPredicates)
{
_maxParallelization = maxParallelization;
_maxQueueingActions = maxQueueingActions;
_maxParallelizationSemaphore = maxParallelizationSemaphore;
_maxQueuedActionsSemaphore = maxQueuedActionsSemaphore;
}
public void Dispose()
{
_maxParallelizationSemaphore.Dispose();
_maxQueuedActionsSemaphore.Dispose();
}
internal BulkheadPolicy(Func<Func<Context, CancellationToken, Task>, Context, CancellationToken, bool, Task> asyncExceptionPolicy, int maxParallelization, int maxQueueingActions, SemaphoreSlim maxParallelizationSemaphore, SemaphoreSlim maxQueuedActionsSemaphore)
: base(asyncExceptionPolicy, PredicateHelper.EmptyExceptionPredicates)
{
_maxParallelization = maxParallelization;
_maxQueueingActions = maxQueueingActions;
_maxParallelizationSemaphore = maxParallelizationSemaphore;
_maxQueuedActionsSemaphore = maxQueuedActionsSemaphore;
}
}
}