public void SetUp()
{
inMemoryCache = new Hashtable();
expirer = new ExpirationTask(this);
expiredItemKeys = "";
callbackCount = 0;
callbackReason = CacheItemRemovedReason.Unknown;
}
public void TestInitialize()
{
inMemoryCache = new Hashtable();
instrumentationProvider = new NullCachingInstrumentationProvider();
expirer = new ExpirationTask(this, instrumentationProvider);
expiredItemKeys = "";
callbackCount = 0;
callbackReason = CacheItemRemovedReason.Unknown;
}
public void TestInitialize()
{
inMemoryCache = new Hashtable();
instrumentationProvider = new CachingInstrumentationProvider();
expirer = new ExpirationTask(this, instrumentationProvider);
expiredItemKeys = "";
callbackCount = 0;
callbackReason = CacheItemRemovedReason.Unknown;
}
public void DoesNotCallbackIfRemoveFromCacheThrowsException()
{
CacheItem exceptionThrowingCacheItem = new CacheItem("ThrowException", "value", CacheItemPriority.Normal, new MockRefreshAction(), null);
exceptionThrowingCacheItem.WillBeExpired = true;
AddCacheItem("ThrowException", exceptionThrowingCacheItem);
ExpirationTask expirer = new ExpirationTask(this);
expirer.SweepExpiredItemsFromCache(inMemoryCache);
Thread.Sleep(250);
Assert.AreEqual(0, callbackCount);
}
public void DoesNotCallbackIfRemoveFromCacheThrowsException()
{
CacheItem exceptionThrowingCacheItem = new CacheItem("ThrowException", "value", CacheItemPriority.Normal, new MockRefreshAction(), null);
exceptionThrowingCacheItem.WillBeExpired = true;
AddCacheItem("ThrowException", exceptionThrowingCacheItem);
ExpirationTask expirer = new ExpirationTask(this, instrumentationProvider);
int expiredItemsCount = expirer.SweepExpiredItemsFromCache(inMemoryCache);
Thread.Sleep(250);
Assert.AreEqual(0, callbackCount);
Assert.AreEqual(1, expiredItemsCount);
}
public void RemovalFailureDuringCacheExpirationDoesFireEvents()
{
ICacheOperations cacheOperations = new FailingOnRemovalCacheOperations();
ExpirationTask expiration = new ExpirationTask(cacheOperations, instrumentationProvider);
CacheItem expiredItem1 = new CacheItem(key1, new object(), CacheItemPriority.NotRemovable, new ExceptionThrowingCallback(), new AlwaysExpired());
cacheOperations.CurrentCacheState.Add(key1, expiredItem1);
expiredItem1.WillBeExpired = true;
expiration.SweepExpiredItemsFromCache(cacheOperations.CurrentCacheState);
Assert.AreEqual(1, instrumentationListener.eventArgs.Count);
Assert.AreSame(typeof(CacheFailureEventArgs), instrumentationListener.eventArgs[0].GetType());
}
public void RemovalAfterMarkingDoesNotTriggerSweepForItem()
{
CacheItem removedItem = CreateNeverExpiredCacheItem("key", "value");
removedItem.WillBeExpired = true;
removedItem.TouchedByUserAction(true);
AddCacheItem("key", removedItem);
ExpirationTask expirer = new ExpirationTask(this, instrumentationProvider);
int expiredItemsCount = expirer.SweepExpiredItemsFromCache(inMemoryCache);
Assert.AreEqual("", expiredItemKeys, "Items removed through user action during expiration should not be further expired.");
Assert.IsFalse(removedItem.WillBeExpired, "User removal of this object should reset its expiration flag");
Assert.AreEqual(0, expiredItemsCount);
}
public void CacheExpirationUnsuccessfulDoesNotFireEvents()
{
ICacheOperations cacheOperations = new MockCacheOperations();
ExpirationTask expiration = new ExpirationTask(cacheOperations, instrumentationProvider);
CacheItem expiredItem1 = new CacheItem(key1, new object(), CacheItemPriority.NotRemovable, null, new NeverExpired());
cacheOperations.CurrentCacheState.Add(key1, expiredItem1);
CacheItem expiredItem2 = new CacheItem(key2, new object(), CacheItemPriority.NotRemovable, null, new NeverExpired());
cacheOperations.CurrentCacheState.Add(key2, expiredItem2);
expiration.DoExpirations();
Assert.AreEqual(0, instrumentationListener.eventArgs.Count);
}
public void WillDoCallbackAtExpiration()
{
CacheItem removedItem = new CacheItem("1", "value", CacheItemPriority.Normal, new MockRefreshAction(), new AlwaysExpired());
removedItem.WillBeExpired = true;
AddCacheItem("1", removedItem);
ExpirationTask expirer = new ExpirationTask(this, instrumentationProvider);
int expiredItemsCount = expirer.SweepExpiredItemsFromCache(inMemoryCache);
Thread.Sleep(250);
Assert.AreEqual(1, callbackCount, "Refresh action should be taken for expired items if it exists");
Assert.AreEqual(CacheItemRemovedReason.Expired, callbackReason);
Assert.AreEqual(1, expiredItemsCount);
}
public void CanDoMarkAndSweepInBackground()
{
CacheItem itemOne = new CacheItem("1", "value", CacheItemPriority.Normal, null, new AbsoluteTime(TimeSpan.FromSeconds(0.5)));
AddCacheItem("1", itemOne);
ExpirationTask expirer = new ExpirationTask(this, instrumentationProvider);
BackgroundScheduler scheduler = new BackgroundScheduler(expirer, null, null);
Thread.Sleep(1000);
scheduler.ExpirationTimeoutExpired(null);
Thread.Sleep(100);
Assert.AreEqual("1", expiredItemKeys, "Item should have been expired in the background");
}
public void ExceptionThrownInCallbackDoesNotStopOtherCallbacksFromExecuting()
{
CacheItem exceptionThrowingCacheItem = new CacheItem("ThrowException", "value", CacheItemPriority.Normal, new ExceptionThrowingMockRefreshAction(), null);
CacheItem normalCacheItem = new CacheItem("normal", "value2", CacheItemPriority.Normal, new MockRefreshAction(), null);
exceptionThrowingCacheItem.WillBeExpired = true;
normalCacheItem.WillBeExpired = true;
AddCacheItem("ThrowException", exceptionThrowingCacheItem);
AddCacheItem("normal", normalCacheItem);
ExpirationTask expirer = new ExpirationTask(this, instrumentationProvider);
int expiredItemsCount = expirer.SweepExpiredItemsFromCache(inMemoryCache);
Thread.Sleep(250);
Assert.AreEqual(1, callbackCount, "Second item was still refreshed despite first refresh action throwing exception");
Assert.AreEqual(CacheItemRemovedReason.Expired, callbackReason);
Assert.AreEqual(2, expiredItemsCount);
}
public void CanDoMarkAndSweepInBackground()
{
CacheItem itemOne = new CacheItem("1", "value", CacheItemPriority.Normal, null, new AbsoluteTime(TimeSpan.FromSeconds(0.5)));
AddCacheItem("1", itemOne);
ExpirationTask expirer = new ExpirationTask(this);
BackgroundScheduler scheduler =
new BackgroundScheduler(expirer, null);
scheduler.Start();
Thread.Sleep(1000);
scheduler.ExpirationTimeoutExpired(null);
Thread.Sleep(100);
scheduler.Stop();
Assert.AreEqual("1", expiredItemKeys, "Item should have been expired in the background");
}
public void CacheExpirationDoesFireEvents()
{
ICacheOperations cacheOperations = new MockCacheOperations();
ExpirationTask expiration = new ExpirationTask(cacheOperations, instrumentationProvider);
CacheItem expiredItem1 = new CacheItem(key1, new object(), CacheItemPriority.NotRemovable, null, new AlwaysExpired());
cacheOperations.CurrentCacheState.Add(key1, expiredItem1);
CacheItem expiredItem2 = new CacheItem(key2, new object(), CacheItemPriority.NotRemovable, null, new AlwaysExpired());
cacheOperations.CurrentCacheState.Add(key2, expiredItem2);
expiration.DoExpirations();
Assert.AreEqual(1, instrumentationListener.eventArgs.Count);
IList <CacheExpiredEventArgs> expiries = FilterEventArgs <CacheExpiredEventArgs>(instrumentationListener.eventArgs);
Assert.AreEqual(1, expiries.Count);
Assert.AreEqual(2L, expiries[0].ItemsExpired);
}
public CacheManager BuildCacheManager(
string cacheManagerName,
IBackingStore backingStore,
int maximumElementsInCacheBeforeScavenging,
int numberToRemoveWhenScavenging,
int expirationPollFrequencyInSeconds,
CachingInstrumentationProvider instrumentationProvider)
{
CacheCapacityScavengingPolicy scavengingPolicy =
new CacheCapacityScavengingPolicy(maximumElementsInCacheBeforeScavenging);
Cache cache = new Cache(backingStore, scavengingPolicy, instrumentationProvider);
ExpirationPollTimer timer = new ExpirationPollTimer();
ExpirationTask expirationTask = CreateExpirationTask(cache, instrumentationProvider);
ScavengerTask scavengerTask = new ScavengerTask(numberToRemoveWhenScavenging, scavengingPolicy, cache, instrumentationProvider);
BackgroundScheduler scheduler = new BackgroundScheduler(expirationTask, scavengerTask, instrumentationProvider);
cache.Initialize(scheduler);
scheduler.Start();
timer.StartPolling(new TimerCallback(scheduler.ExpirationTimeoutExpired), expirationPollFrequencyInSeconds * 1000);
return(new CacheManager(cache, scheduler, timer));
}
public void ExceptionThrownInCallbackDoesNotStopOtherCallbacksFromExecuting()
{
CacheItem exceptionThrowingCacheItem = new CacheItem("ThrowException", "value", CacheItemPriority.Normal, new ExceptionThrowingMockRefreshAction(), null);
CacheItem normalCacheItem = new CacheItem("normal", "value2", CacheItemPriority.Normal, new MockRefreshAction(), null);
exceptionThrowingCacheItem.WillBeExpired = true;
normalCacheItem.WillBeExpired = true;
AddCacheItem("ThrowException", exceptionThrowingCacheItem);
AddCacheItem("normal", normalCacheItem);
ExpirationTask expirer = new ExpirationTask(this, instrumentationProvider);
int expiredItemsCount = expirer.SweepExpiredItemsFromCache(inMemoryCache);
Thread.Sleep(250);
Assert.AreEqual(1, callbackCount, "Second item was still refreshed despite first refresh action throwing exception");
Assert.AreEqual(CacheItemRemovedReason.Expired, callbackReason);
Assert.AreEqual(2, expiredItemsCount);
}
public void WillDoCallbackAtExpiration()
{
CacheItem removedItem = new CacheItem("1", "value", CacheItemPriority.Normal, new MockRefreshAction(), new AlwaysExpired());
removedItem.WillBeExpired = true;
AddCacheItem("1", removedItem);
ExpirationTask expirer = new ExpirationTask(this, instrumentationProvider);
int expiredItemsCount = expirer.SweepExpiredItemsFromCache(inMemoryCache);
Thread.Sleep(250);
Assert.AreEqual(1, callbackCount, "Refresh action should be taken for expired items if it exists");
Assert.AreEqual(CacheItemRemovedReason.Expired, callbackReason);
Assert.AreEqual(1, expiredItemsCount);
}
public void RemovalAfterMarkingDoesNotTriggerSweepForItem()
{
CacheItem removedItem = CreateNeverExpiredCacheItem("key", "value");
removedItem.WillBeExpired = true;
removedItem.TouchedByUserAction(true);
AddCacheItem("key", removedItem);
ExpirationTask expirer = new ExpirationTask(this, instrumentationProvider);
int expiredItemsCount = expirer.SweepExpiredItemsFromCache(inMemoryCache);
Assert.AreEqual("", expiredItemKeys, "Items removed through user action during expiration should not be further expired.");
Assert.IsFalse(removedItem.WillBeExpired, "User removal of this object should reset its expiration flag");
Assert.AreEqual(0, expiredItemsCount);
}
public void SetUp()
{
inMemoryCache = new Hashtable();
expirer = new ExpirationTask(this);
expiredItemKeys = "";
callbackCount = 0;
callbackReason = CacheItemRemovedReason.Unknown;
}
/// <param name="expirationTask">Задание для экспиратора</param>
/// <param name="scavengerTask">Задание для сборщика</param>
/// <param name="instrumentationProvider"></param>
public BackgroundScheduler(ExpirationTask expirationTask, ScavengerTask scavengerTask, ICachingInstrumentationProvider instrumentationProvider)
{
this.expirationTask = expirationTask;
this.scavengerTask = scavengerTask;
this.instrumentationProvider = instrumentationProvider;
}