public override async Task DisposeAsyncReleasesQueuedAcquires() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 3 }); using var lease = limiter.AttemptAcquire(1); var wait1 = limiter.AcquireAsync(1); var wait2 = limiter.AcquireAsync(1); var wait3 = limiter.AcquireAsync(1); Assert.False(wait1.IsCompleted); Assert.False(wait2.IsCompleted); Assert.False(wait3.IsCompleted); await limiter.DisposeAsync(); var failedLease = await wait1; Assert.False(failedLease.IsAcquired); failedLease = await wait2; Assert.False(failedLease.IsAcquired); failedLease = await wait3; Assert.False(failedLease.IsAcquired); lease.Dispose(); // Throws after disposal Assert.Throws <ObjectDisposedException>(() => limiter.AttemptAcquire(1)); await Assert.ThrowsAsync <ObjectDisposedException>(() => limiter.AcquireAsync(1).AsTask()); }
public override async Task GetStatisticsWithZeroPermitCount() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 100, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 50 }); var lease = limiter.AttemptAcquire(0); Assert.True(lease.IsAcquired); Assert.Equal(1, limiter.GetStatistics().TotalSuccessfulLeases); Assert.Equal(100, limiter.GetStatistics().CurrentAvailablePermits); lease = await limiter.AcquireAsync(0); Assert.True(lease.IsAcquired); Assert.Equal(2, limiter.GetStatistics().TotalSuccessfulLeases); Assert.Equal(100, limiter.GetStatistics().CurrentAvailablePermits); lease = limiter.AttemptAcquire(100); Assert.True(lease.IsAcquired); Assert.Equal(3, limiter.GetStatistics().TotalSuccessfulLeases); Assert.Equal(0, limiter.GetStatistics().CurrentAvailablePermits); var lease2 = limiter.AttemptAcquire(0); Assert.False(lease2.IsAcquired); Assert.Equal(3, limiter.GetStatistics().TotalSuccessfulLeases); Assert.Equal(1, limiter.GetStatistics().TotalFailedLeases); Assert.Equal(0, limiter.GetStatistics().CurrentAvailablePermits); }
public override async Task QueueAvailableAfterQueueLimitHitAndResources_BecomeAvailable() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); var lease = limiter.AttemptAcquire(1); var wait = limiter.AcquireAsync(1); var failedLease = await limiter.AcquireAsync(1); Assert.False(failedLease.IsAcquired); lease.Dispose(); lease = await wait; Assert.True(lease.IsAcquired); wait = limiter.AcquireAsync(1); Assert.False(wait.IsCompleted); lease.Dispose(); lease = await wait; Assert.True(lease.IsAcquired); }
public override async Task LargeAcquiresAndQueuesDoNotIntegerOverflow() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = int.MaxValue, QueueProcessingOrder = QueueProcessingOrder.NewestFirst, QueueLimit = int.MaxValue }); var lease = limiter.AttemptAcquire(int.MaxValue); Assert.True(lease.IsAcquired); // Fill queue var wait = limiter.AcquireAsync(3); Assert.False(wait.IsCompleted); var wait2 = limiter.AcquireAsync(int.MaxValue); Assert.False(wait2.IsCompleted); var lease1 = await wait; Assert.False(lease1.IsAcquired); lease.Dispose(); var lease2 = await wait2; Assert.True(lease2.IsAcquired); }
public override async Task DropsRequestedLeaseIfPermitCountGreaterThanQueueLimitAndNoAvailability_NewestFirst() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 2, QueueProcessingOrder = QueueProcessingOrder.NewestFirst, QueueLimit = 1 }); var lease = limiter.AttemptAcquire(2); Assert.True(lease.IsAcquired); // Fill queue var wait = limiter.AcquireAsync(1); Assert.False(wait.IsCompleted); var lease1 = await limiter.AcquireAsync(2); Assert.False(lease1.IsAcquired); lease.Dispose(); var lease2 = await wait; Assert.True(lease2.IsAcquired); }
public override async Task CancelUpdatesQueueLimit() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); var lease = limiter.AttemptAcquire(1); Assert.True(lease.IsAcquired); var cts = new CancellationTokenSource(); var wait = limiter.AcquireAsync(1, cts.Token); cts.Cancel(); var ex = await Assert.ThrowsAsync <TaskCanceledException>(() => wait.AsTask()); Assert.Equal(cts.Token, ex.CancellationToken); wait = limiter.AcquireAsync(1); Assert.False(wait.IsCompleted); lease.Dispose(); lease = await wait; Assert.True(lease.IsAcquired); }
public override async Task DropsMultipleOldestWhenQueuingMoreThanLimit_NewestFirst() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 2, QueueProcessingOrder = QueueProcessingOrder.NewestFirst, QueueLimit = 2 }); var lease = limiter.AttemptAcquire(2); Assert.True(lease.IsAcquired); var wait = limiter.AcquireAsync(1); Assert.False(wait.IsCompleted); var wait2 = limiter.AcquireAsync(1); Assert.False(wait2.IsCompleted); var wait3 = limiter.AcquireAsync(2); var lease1 = await wait; var lease2 = await wait2; Assert.False(lease1.IsAcquired); Assert.False(lease2.IsAcquired); Assert.False(wait3.IsCompleted); lease.Dispose(); lease = await wait3; Assert.True(lease.IsAcquired); }
public override async Task CannotAcquireResourcesWithAcquireWithQueuedItemsIfOldestFirst() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 2, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 3 }); using var lease = await limiter.AcquireAsync(1); Assert.True(lease.IsAcquired); var wait1 = limiter.AcquireAsync(2); Assert.False(wait1.IsCompleted); var lease2 = limiter.AttemptAcquire(1); Assert.False(lease2.IsAcquired); lease.Dispose(); var lease1 = await wait1; Assert.True(lease1.IsAcquired); }
public override void CanAcquireResource() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.NewestFirst, QueueLimit = 1 }); var lease = limiter.AttemptAcquire(); Assert.True(lease.IsAcquired); Assert.False(limiter.AttemptAcquire().IsAcquired); lease.Dispose(); Assert.True(limiter.AttemptAcquire().IsAcquired); }
public override void AcquireZero_WithoutAvailability() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.NewestFirst, QueueLimit = 1 }); using var lease = limiter.AttemptAcquire(1); Assert.True(lease.IsAcquired); var lease2 = limiter.AttemptAcquire(0); Assert.False(lease2.IsAcquired); lease2.Dispose(); }
public override void ThrowsWhenAcquiringLessThanZero() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.NewestFirst, QueueLimit = 1 }); Assert.Throws <ArgumentOutOfRangeException>(() => limiter.AttemptAcquire(-1)); }
public override void NoMetadataOnAcquiredLease() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); using var lease = limiter.AttemptAcquire(1); Assert.False(lease.TryGetMetadata(MetadataName.ReasonPhrase.Name, out _)); }
public override void ThrowsWhenAcquiringMoreThanLimit() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.NewestFirst, QueueLimit = 1 }); var ex = Assert.Throws <ArgumentOutOfRangeException>(() => limiter.AttemptAcquire(2)); Assert.Equal("permitCount", ex.ParamName); }
public override void NullIdleDurationWhenActive() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); using var lease = limiter.AttemptAcquire(1); Assert.Null(limiter.IdleDuration); }
public override void MetadataNamesContainsAllMetadata() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); using var lease = limiter.AttemptAcquire(1); Assert.Collection(lease.MetadataNames, metadataName => Assert.Equal(metadataName, MetadataName.ReasonPhrase.Name)); }
public override void IdleDurationUpdatesWhenChangingFromActive() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); var lease = limiter.AttemptAcquire(1); lease.Dispose(); Assert.NotNull(limiter.IdleDuration); }
public override async Task FailsWhenQueuingMoreThanLimit_OldestFirst() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); using var lease = limiter.AttemptAcquire(1); var wait = limiter.AcquireAsync(1); var failedLease = await limiter.AcquireAsync(1); Assert.False(failedLease.IsAcquired); }
public override void GetStatisticsReturnsNewInstances() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); var stats = limiter.GetStatistics(); Assert.Equal(1, stats.CurrentAvailablePermits); var lease = limiter.AttemptAcquire(1); var stats2 = limiter.GetStatistics(); Assert.NotSame(stats, stats2); Assert.Equal(1, stats.CurrentAvailablePermits); Assert.Equal(0, stats2.CurrentAvailablePermits); }
public async Task ReasonMetadataOnFailedWaitAsync() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 2, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); using var lease = limiter.AttemptAcquire(2); var failedLease = await limiter.AcquireAsync(2); Assert.False(failedLease.IsAcquired); Assert.True(failedLease.TryGetMetadata(MetadataName.ReasonPhrase.Name, out var metadata)); Assert.Equal("Queue limit reached", metadata); Assert.True(failedLease.TryGetMetadata(MetadataName.ReasonPhrase, out var typedMetadata)); Assert.Equal("Queue limit reached", typedMetadata); Assert.Collection(failedLease.MetadataNames, item => item.Equals(MetadataName.ReasonPhrase.Name)); }
public override async Task CanFillQueueWithNewestFirstAfterCancelingQueuedRequestWithAnotherQueuedRequest() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 2, QueueProcessingOrder = QueueProcessingOrder.NewestFirst, QueueLimit = 2 }); var lease = limiter.AttemptAcquire(2); Assert.True(lease.IsAcquired); var cts = new CancellationTokenSource(); var wait = limiter.AcquireAsync(1, cts.Token); // Add another item to queue, will be completed as failed later when we queue another item var wait2 = limiter.AcquireAsync(1); Assert.False(wait.IsCompleted); cts.Cancel(); var ex = await Assert.ThrowsAsync <TaskCanceledException>(() => wait.AsTask()); Assert.Equal(cts.Token, ex.CancellationToken); var wait3 = limiter.AcquireAsync(2); Assert.False(wait3.IsCompleted); // will be kicked by wait3 because we're using NewestFirst var lease2 = await wait2; Assert.False(lease2.IsAcquired); lease.Dispose(); lease = await wait3; Assert.True(lease.IsAcquired); }
public override async Task CanDisposeAfterCancelingQueuedRequest() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); var lease = limiter.AttemptAcquire(1); Assert.True(lease.IsAcquired); var cts = new CancellationTokenSource(); var wait = limiter.AcquireAsync(1, cts.Token); cts.Cancel(); var ex = await Assert.ThrowsAsync <TaskCanceledException>(() => wait.AsTask()); Assert.Equal(cts.Token, ex.CancellationToken); // Make sure dispose doesn't have any side-effects when dealing with a canceled queued item limiter.Dispose(); }
public override async Task CanCancelAcquireAsyncBeforeQueuing() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 1, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 1 }); var lease = limiter.AttemptAcquire(1); Assert.True(lease.IsAcquired); var cts = new CancellationTokenSource(); cts.Cancel(); var ex = await Assert.ThrowsAsync <TaskCanceledException>(() => limiter.AcquireAsync(1, cts.Token).AsTask()); Assert.Equal(cts.Token, ex.CancellationToken); lease.Dispose(); Assert.Equal(1, limiter.GetStatistics()?.CurrentAvailablePermits); }
public override async Task GetStatisticsHasCorrectValues() { var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions { PermitLimit = 100, QueueProcessingOrder = QueueProcessingOrder.OldestFirst, QueueLimit = 50 }); var stats = limiter.GetStatistics(); Assert.Equal(100, stats.CurrentAvailablePermits); Assert.Equal(0, stats.CurrentQueuedCount); Assert.Equal(0, stats.TotalFailedLeases); Assert.Equal(0, stats.TotalSuccessfulLeases); // success from acquire + available var lease1 = limiter.AttemptAcquire(60); stats = limiter.GetStatistics(); Assert.Equal(40, stats.CurrentAvailablePermits); Assert.Equal(0, stats.CurrentQueuedCount); Assert.Equal(0, stats.TotalFailedLeases); Assert.Equal(1, stats.TotalSuccessfulLeases); // queue var lease2Task = limiter.AcquireAsync(50); stats = limiter.GetStatistics(); Assert.Equal(40, stats.CurrentAvailablePermits); Assert.Equal(50, stats.CurrentQueuedCount); Assert.Equal(0, stats.TotalFailedLeases); Assert.Equal(1, stats.TotalSuccessfulLeases); // failure from wait var lease3 = await limiter.AcquireAsync(1); Assert.False(lease3.IsAcquired); stats = limiter.GetStatistics(); Assert.Equal(40, stats.CurrentAvailablePermits); Assert.Equal(50, stats.CurrentQueuedCount); Assert.Equal(1, stats.TotalFailedLeases); Assert.Equal(1, stats.TotalSuccessfulLeases); // failure from acquire var lease4 = limiter.AttemptAcquire(100); Assert.False(lease4.IsAcquired); stats = limiter.GetStatistics(); Assert.Equal(40, stats.CurrentAvailablePermits); Assert.Equal(50, stats.CurrentQueuedCount); Assert.Equal(2, stats.TotalFailedLeases); Assert.Equal(1, stats.TotalSuccessfulLeases); lease1.Dispose(); await lease2Task; // success from wait + available + queue stats = limiter.GetStatistics(); Assert.Equal(50, stats.CurrentAvailablePermits); Assert.Equal(0, stats.CurrentQueuedCount); Assert.Equal(2, stats.TotalFailedLeases); Assert.Equal(2, stats.TotalSuccessfulLeases); }