public async Task Should_aquire_on_renew_when_expired()
{
var nowUtc = DateTime.UtcNow;
SqlServerSemaphore sema = new SqlServerSemaphore(ConnectionString, _semaphoreName, 2, 1);
var owner1Res = await sema.TryAcquire(_ownerId1);
owner1Res.ShouldBeTrue();
await Task.Delay(2500);
var semaInfo = await sema.GetSemaphoreInfo();
var owners = sema.Deserialize(semaInfo.OwnersJson);
var owner1 = owners.Owners.Single(x => x.OwnerId == _ownerId1);
owner1.ExpiresAtUtc.ShouldBeLessThan(DateTime.UtcNow);
var renewNow = DateTime.UtcNow;
var owner1RenewRes = await sema.TryRenew(_ownerId1);
owner1RenewRes.ShouldBeTrue();
semaInfo = await sema.GetSemaphoreInfo();
owners = sema.Deserialize(semaInfo.OwnersJson);
owner1 = owners.Owners.Single(x => x.OwnerId == _ownerId1);
owner1.ExpiresAtUtc.ShouldBeGreaterThan(renewNow);
}
public async Task Should_throw_exception_when_create_already_exists()
{
SqlServerSemaphore sema = new SqlServerSemaphore(ConnectionString, _semaphoreName, 120, 1);
var semaInfo = await sema.CreateSemaphore();
Should.Throw <Microsoft.Data.SqlClient.SqlException>(sema.CreateSemaphore());
}
public async Task Should_create_semaphore_on_aquire_if_not_exists()
{
SqlServerSemaphore sema = new SqlServerSemaphore(ConnectionString, _semaphoreName, 120, 1);
var owner1Res = await sema.TryAcquire(_ownerId1);
owner1Res.ShouldBeTrue();
var semaInfo = await sema.GetSemaphoreInfo();
semaInfo.Name.ShouldBe(_semaphoreName);
}
public async Task Should_create_semaphore()
{
SqlServerSemaphore sema = new SqlServerSemaphore(ConnectionString, _semaphoreName, 120, 1);
var semaInfo = await sema.CreateSemaphore();
semaInfo.Name.ShouldBe(_semaphoreName);
//should have a non empty RowVersion
semaInfo.RowVerion.Any(x => x != default(byte)).ShouldBeTrue();
var owners = sema.Deserialize(semaInfo.OwnersJson);
owners.Name.ShouldBe(_semaphoreName);
owners.Owners.ShouldNotBeNull();
owners.Owners.Count().ShouldBe(0);
}
public async Task Should_aquire_on_renew_when_not_owner()
{
var nowUtc = DateTime.UtcNow;
SqlServerSemaphore sema = new SqlServerSemaphore(ConnectionString, _semaphoreName, 20, 1);
var owner1Res = await sema.TryRenew(_ownerId1);
owner1Res.ShouldBeTrue();
var semaInfo = await sema.GetSemaphoreInfo();
var owners = sema.Deserialize(semaInfo.OwnersJson);
owners.Owners.Count.ShouldBe(1);
var owner1 = owners.Owners.Single(x => x.OwnerId == _ownerId1);
owner1.ExpiresAtUtc.ShouldBeGreaterThan(DateTime.UtcNow);
}
public async Task Should_add_first_owner()
{
var nowUtc = DateTime.UtcNow;
SqlServerSemaphore sema = new SqlServerSemaphore(ConnectionString, _semaphoreName, 120, 1);
var owner1Res = await sema.TryAcquire(_ownerId1);
owner1Res.ShouldBeTrue();
var semaInfo = await sema.GetSemaphoreInfo();
semaInfo.Name.ShouldBe(_semaphoreName);
var owners = sema.Deserialize(semaInfo.OwnersJson);
owners.Name.ShouldBe(_semaphoreName);
owners.Owners.ShouldNotBeNull();
owners.Owners.Count().ShouldBe(1);
owners.Owners.First().OwnerId.ShouldBe(_ownerId1);
owners.Owners.First().ExpiresAtUtc.ShouldBeInRange(nowUtc.AddSeconds(120), nowUtc.AddSeconds(125));
}
public async Task Should_remove_expired_on_acquire()
{
SqlServerSemaphore sema = new SqlServerSemaphore(ConnectionString, _semaphoreName, 1, 5);
var owner1Res = await sema.TryAcquire(_ownerId1);
owner1Res.ShouldBeTrue();
await Task.Delay(1500);
var owner2Res = await sema.TryAcquire(_ownerId2);
var semaInfo = await sema.GetSemaphoreInfo();
owner2Res.ShouldBeTrue();
var owners = sema.Deserialize(semaInfo.OwnersJson);
owners.Owners.Count().ShouldBe(1);
owners.Owners.Single().OwnerId.ShouldBe(_ownerId2);
}
public async Task Should_add_owners_up_to_max()
{
SqlServerSemaphore sema = new SqlServerSemaphore(ConnectionString, _semaphoreName, 120, 5);
var owner1Res = await sema.TryAcquire(_ownerId1);
var owner2Res = await sema.TryAcquire(_ownerId2);
var owner3Res = await sema.TryAcquire(_ownerId3);
var owner4Res = await sema.TryAcquire(_ownerId4);
var owner5Res = await sema.TryAcquire(_ownerId5);
var owner6Res = await sema.TryAcquire(_ownerId6);
owner1Res.ShouldBeTrue();
owner2Res.ShouldBeTrue();
owner3Res.ShouldBeTrue();
owner4Res.ShouldBeTrue();
owner5Res.ShouldBeTrue();
owner6Res.ShouldBeFalse();
}
public async Task Should_release()
{
SqlServerSemaphore sema = new SqlServerSemaphore(ConnectionString, _semaphoreName, 10, 5);
var owner1Res = await sema.TryAcquire(_ownerId1);
var owner2Res = await sema.TryAcquire(_ownerId2);
var owner3Res = await sema.TryAcquire(_ownerId3);
var owner4Res = await sema.TryAcquire(_ownerId4);
var owner5Res = await sema.TryAcquire(_ownerId5);
var owner6Res = await sema.TryAcquire(_ownerId6);
owner1Res.ShouldBeTrue();
owner2Res.ShouldBeTrue();
owner3Res.ShouldBeTrue();
owner4Res.ShouldBeTrue();
owner5Res.ShouldBeTrue();
owner6Res.ShouldBeFalse();
var nowUtc = DateTime.UtcNow;
var owner1ReleaseRes = await sema.TryRelease(_ownerId1);
var owner2ReleaseRes = await sema.TryRelease(_ownerId2);
var owner3ReleaseRes = await sema.TryRelease(_ownerId3);
var owner4ReleaseRes = await sema.TryRelease(_ownerId4);
var owner5ReleaseRes = await sema.TryRelease(_ownerId5);
owner1ReleaseRes.ShouldBeTrue();
owner2ReleaseRes.ShouldBeTrue();
owner3ReleaseRes.ShouldBeTrue();
owner4ReleaseRes.ShouldBeTrue();
owner5ReleaseRes.ShouldBeTrue();
var semaInfo = await sema.GetSemaphoreInfo();
var owners = sema.Deserialize(semaInfo.OwnersJson);
owners.Owners.Count().ShouldBe(0);
owner6Res = await sema.TryAcquire(_ownerId6);
var owner7Res = await sema.TryAcquire(_ownerId7);
var owner8Res = await sema.TryAcquire(_ownerId8);
var owner9Res = await sema.TryAcquire(_ownerId9);
var owner10Res = await sema.TryAcquire(_ownerId10);
owner6Res.ShouldBeTrue();
owner7Res.ShouldBeTrue();
owner8Res.ShouldBeTrue();
owner9Res.ShouldBeTrue();
owner10Res.ShouldBeTrue();
}
public async Task Should_renew()
{
SqlServerSemaphore sema = new SqlServerSemaphore(ConnectionString, _semaphoreName, 10, 5);
var owner1Res = await sema.TryAcquire(_ownerId1);
var owner2Res = await sema.TryAcquire(_ownerId2);
var owner3Res = await sema.TryAcquire(_ownerId3);
var owner4Res = await sema.TryAcquire(_ownerId4);
var owner5Res = await sema.TryAcquire(_ownerId5);
var owner6Res = await sema.TryAcquire(_ownerId6);
owner1Res.ShouldBeTrue();
owner2Res.ShouldBeTrue();
owner3Res.ShouldBeTrue();
owner4Res.ShouldBeTrue();
owner5Res.ShouldBeTrue();
owner6Res.ShouldBeFalse();
await Task.Delay(5000);
var nowUtc = DateTime.UtcNow;
var owner1RenewRes = await sema.TryRenew(_ownerId1);
var owner2RenewRes = await sema.TryRenew(_ownerId2);
var owner3RenewRes = await sema.TryRenew(_ownerId3);
var owner4RenewRes = await sema.TryRenew(_ownerId4);
var owner5RenewRes = await sema.TryRenew(_ownerId5);
var owner6RenewRes = await sema.TryRenew(_ownerId6);
owner1RenewRes.ShouldBeTrue();
owner2RenewRes.ShouldBeTrue();
owner3RenewRes.ShouldBeTrue();
owner4RenewRes.ShouldBeTrue();
owner5RenewRes.ShouldBeTrue();
owner6RenewRes.ShouldBeFalse();
var semaInfo = await sema.GetSemaphoreInfo();
var owners = sema.Deserialize(semaInfo.OwnersJson);
owners.Owners.Count().ShouldBe(5);
var owner1 = owners.Owners.Single(x => x.OwnerId == _ownerId1);
owner1.ExpiresAtUtc.ShouldBeInRange(nowUtc.AddSeconds(9), nowUtc.AddSeconds(13));
var owner2 = owners.Owners.Single(x => x.OwnerId == _ownerId2);
owner2.ExpiresAtUtc.ShouldBeInRange(nowUtc.AddSeconds(9), nowUtc.AddSeconds(13));
var owner3 = owners.Owners.Single(x => x.OwnerId == _ownerId3);
owner3.ExpiresAtUtc.ShouldBeInRange(nowUtc.AddSeconds(9), nowUtc.AddSeconds(13));
var owner4 = owners.Owners.Single(x => x.OwnerId == _ownerId4);
owner4.ExpiresAtUtc.ShouldBeInRange(nowUtc.AddSeconds(9), nowUtc.AddSeconds(13));
var owner5 = owners.Owners.Single(x => x.OwnerId == _ownerId5);
owner5.ExpiresAtUtc.ShouldBeInRange(nowUtc.AddSeconds(9), nowUtc.AddSeconds(13));
}
