public void MicroStressTest()
{
// Run a bunch of concurrent reads and writes, make sure we get no exceptions
var imc = new EntityFrameworkCache(100);
const int NumberOfRequestBatches = 50; // will be multiplied by 5 (3 readers + 1 writer + 1 invalidator)
const int NumberOfIterationsPerThread = 100;
var startEvent = new ManualResetEvent(false);
Action writer = () =>
{
startEvent.WaitOne();
var random = new Random();
for (var i = 0; i < NumberOfIterationsPerThread; ++i)
{
var randomKey = Guid.NewGuid().ToString("N").Substring(0, 4);
var randomValue = randomKey + "_V";
var dependentSets = new List<string>();
var numberOfDependencies = random.Next(5);
for (var j = 0; j < numberOfDependencies; ++j)
{
var randomSetName = new string((char)('A' + random.Next(26)), 1);
dependentSets.Add(randomSetName);
}
imc.PutItem(randomKey, randomValue, dependentSets, TimeSpan.Zero, DateTime.MaxValue);
}
};
Action invalidator = () =>
{
startEvent.WaitOne();
var random = new Random();
for (var i = 0; i < NumberOfIterationsPerThread; ++i)
{
var dependentSets = new List<string>();
var numberOfDependencies = random.Next(5);
for (var j = 0; j < numberOfDependencies; ++j)
{
var randomSetName = new string((char)('A' + random.Next(26)), 1);
dependentSets.Add(randomSetName);
}
imc.InvalidateSets(dependentSets);
}
};
Action reader = () =>
{
startEvent.WaitOne();
for (var i = 0; i < NumberOfIterationsPerThread; ++i)
{
var randomKey = Guid.NewGuid().ToString("N").Substring(0, 4);
object value;
if (imc.GetItem(randomKey, out value))
{
Assert.AreEqual(randomKey + "_V", value);
}
}
};
var threads = new List<Thread>();
for (var i = 0; i < NumberOfRequestBatches; ++i)
{
threads.Add(new Thread(() => writer()));
threads.Add(new Thread(() => invalidator()));
threads.Add(new Thread(() => reader()));
threads.Add(new Thread(() => reader()));
threads.Add(new Thread(() => reader()));
}
foreach (var t in threads)
{
t.Start();
}
startEvent.Set();
foreach (var t in threads)
{
t.Join();
}
}
public void DependenciesTest4()
{
var imc = new EntityFrameworkCache();
imc.PutItem("A", "A1", new[] { "set1" }, TimeSpan.Zero, DateTime.MaxValue);
imc.PutItem("B", "B1", new[] { "set1", "set2" }, TimeSpan.Zero, DateTime.MaxValue);
imc.PutItem("C", "C1", new[] { "set2", "set3" }, TimeSpan.Zero, DateTime.MaxValue);
imc.PutItem("D", "D1", new[] { "set3", "set1" }, TimeSpan.Zero, DateTime.MaxValue);
Assert.AreEqual("D|C|B|A", GetItemKeysInLruOrder(imc));
imc.PutItem("B", "C1", new[] { "set3" }, TimeSpan.Zero, DateTime.MaxValue);
Assert.AreEqual("B|D|C|A", GetItemKeysInLruOrder(imc));
imc.InvalidateSets(new[] { "set3" });
Assert.AreEqual("A", GetItemKeysInLruOrder(imc));
}