public async Task OnceSessionReleasedGetSessionWillQueueWorkOnIt()
{
var livyClient = Substitute.For <ILivyClient>();
var livySession1 = Substitute.For <ILivySession>();
var livySession2 = Substitute.For <ILivySession>();
var livySession3 = Substitute.For <ILivySession>();
var livySession4 = Substitute.For <ILivySession>();
var livySession5 = Substitute.For <ILivySession>();
var source1 = new TaskCompletionSource <bool>();
var source2 = new TaskCompletionSource <bool>();
var source3 = new TaskCompletionSource <bool>();
var source4 = new TaskCompletionSource <bool>();
var source5 = new TaskCompletionSource <bool>();
livySession1.WaitForSessionAsync().Returns(source1.Task);
livySession2.WaitForSessionAsync().Returns(source2.Task);
livySession3.WaitForSessionAsync().Returns(source3.Task);
livySession4.WaitForSessionAsync().Returns(source4.Task);
livySession5.WaitForSessionAsync().Returns(source5.Task);
livyClient.CreateSessionAsync(Arg.Any <LivySessionConfiguration>())
.Returns(Task.FromResult(livySession1),
Task.FromResult(livySession2),
Task.FromResult(livySession3),
Task.FromResult(livySession4),
Task.FromResult(livySession5),
null);
var pool = new CosmosDbLivySessionPool(livyClient, new CosmosCollectionSettings(), LivySessionConfiguration.Default, 5);
async void WaitAndReleaseSession3()
{
await Task.Delay(100);
source3.SetResult(true);
}
WaitAndReleaseSession3();
var result = await Enumerable.Repeat(0, 100).Select(_ => pool.GetSessionAsync());
var sessions = result.GroupBy(s => s).Select(g => new { g.Key, Count = g.Count() });
ILivySession GetSession(CosmosDbLivySession sqlSession) =>
((Lazy <Task <ILivySession> >)
typeof(CosmosDbLivySession).GetField("_session", BindingFlags.NonPublic | BindingFlags.Instance)?
.GetValue(sqlSession))?.Value.Result;
var enumerable = sessions.Single(g => GetSession(g.Key) == livySession3);
Assert.That(enumerable.Count, Is.EqualTo(96));
}
public async Task GetSessionAlwaysReturnOneOfFiveSessions()
{
var livyClient = Substitute.For <ILivyClient>();
var livySession1 = Substitute.For <ILivySession>();
var livySession2 = Substitute.For <ILivySession>();
var livySession3 = Substitute.For <ILivySession>();
var livySession4 = Substitute.For <ILivySession>();
var livySession5 = Substitute.For <ILivySession>();
livyClient.CreateSessionAsync(Arg.Any <LivySessionConfiguration>())
.Returns(Task.FromResult(livySession1),
Task.FromResult(livySession2),
Task.FromResult(livySession3),
Task.FromResult(livySession4),
Task.FromResult(livySession5),
null);
var pool = new CosmosDbLivySessionPool(livyClient, new CosmosCollectionSettings(), LivySessionConfiguration.Default, 5);
var result = await Enumerable.Repeat(0, 100).Select(_ => pool.GetSessionAsync());
Assert.That(result.Distinct().Count(), Is.EqualTo(5));
}