public void WillScavenge() { CacheItem item1 = new CacheItem("key1", "value1", CacheItemPriority.NotRemovable, null); CacheItem item2 = new CacheItem("key2", "value2", CacheItemPriority.High, null); CacheItem item3 = new CacheItem("key3", "value3", CacheItemPriority.Normal, null); CacheItem item4 = new CacheItem("key4", "value4", CacheItemPriority.Low, null); AddCacheItem("key1", item1); AddCacheItem("key2", item2); AddCacheItem("key3", item3); AddCacheItem("key4", item4); TestConfigurationContext context = new TestConfigurationContext(); CachingConfigurationView view = new CachingConfigurationView(context); view.GetCacheManagerSettings().CacheManagers["test"].MaximumElementsInCacheBeforeScavenging = 1; view.GetCacheManagerSettings().CacheManagers["test"].NumberToRemoveWhenScavenging = 2; CacheCapacityScavengingPolicy scavengingPolicy = new CacheCapacityScavengingPolicy("test", view); ScavengerTask scavenger = new ScavengerTask("test", view, scavengingPolicy, this); scavenger.DoScavenging(); Assert.AreEqual("key4key3", scavengedKeys); }
public void CanScavengeInBackground() { CacheItem item1 = new CacheItem("key1", "value1", CacheItemPriority.Low, null); CacheItem item2 = new CacheItem("key2", "value2", CacheItemPriority.Normal, null); CacheItem item3 = new CacheItem("key3", "value3", CacheItemPriority.High, null); AddCacheItem("key1", item1); AddCacheItem("key2", item2); AddCacheItem("key3", item3); TestConfigurationContext context = new TestConfigurationContext(); CachingConfigurationView view = new CachingConfigurationView(context); view.GetCacheManagerSettings().CacheManagers["test"].MaximumElementsInCacheBeforeScavenging = 2; view.GetCacheManagerSettings().CacheManagers["test"].NumberToRemoveWhenScavenging = 1; CacheCapacityScavengingPolicy scavengingPolicy = new CacheCapacityScavengingPolicy("test", view); ScavengerTask scavenger = new ScavengerTask("test", view, scavengingPolicy, this); BackgroundScheduler scheduler = new BackgroundScheduler(null, scavenger); scheduler.Start(); Thread.Sleep(500); scheduler.StartScavenging(); Thread.Sleep(250); scheduler.Stop(); Thread.Sleep(250); Assert.AreEqual("key1", scavengedKeys); }
public void CanScavengeInBackground() { CacheItem item1 = new CacheItem("key1", "value1", CacheItemPriority.Low, null); CacheItem item2 = new CacheItem("key2", "value2", CacheItemPriority.Normal, null); CacheItem item3 = new CacheItem("key3", "value3", CacheItemPriority.High, null); AddCacheItem("key1", item1); AddCacheItem("key2", item2); AddCacheItem("key3", item3); CacheCapacityScavengingPolicy scavengingPolicy = new CacheCapacityScavengingPolicy(2); ScavengerTask scavenger = new ScavengerTask(1, scavengingPolicy, this, instrumentationProvider); BackgroundScheduler scheduler = new BackgroundScheduler(null, scavenger, instrumentationProvider); scheduler.Start(); Thread.Sleep(500); scheduler.StartScavenging(); Thread.Sleep(250); scheduler.Stop(); Thread.Sleep(250); Assert.AreEqual("key1", scavengedKeys); }
public void WillRemoveMultipleEligibleForScavenging() { TestConfigurationContext context = new TestConfigurationContext(); CachingConfigurationView view = new CachingConfigurationView(context); view.GetCacheManagerSettings().CacheManagers["test"].MaximumElementsInCacheBeforeScavenging = 2; view.GetCacheManagerSettings().CacheManagers["test"].NumberToRemoveWhenScavenging = 3; CacheCapacityScavengingPolicy scavengingPolicy = new CacheCapacityScavengingPolicy("test", view); ScavengerTask scavenger = new ScavengerTask("test", view, scavengingPolicy, this); CacheItem itemToRemove = new CacheItem("key1", "value", CacheItemPriority.High, null); CacheItem itemToRemain = new CacheItem("key2", "value", CacheItemPriority.Low, null); CacheItem itemToRemoveAlso = new CacheItem("key3", "value", CacheItemPriority.Normal, null); itemToRemove.MakeEligibleForScavenging(); itemToRemain.MakeEligibleForScavenging(); itemToRemoveAlso.MakeEligibleForScavenging(); AddCacheItem("key1", itemToRemove); AddCacheItem("key2", itemToRemain); AddCacheItem("key3", itemToRemoveAlso); scavenger.DoScavenging(); Assert.AreEqual("key2key3key1", scavengedKeys); }
public void WillNotRemoveItemIfNotEligibleForScavenging() { ScavengerTask scavenger = new ScavengerTask(0, 1, this, instrumentationProvider); CacheItem itemToRemove = new CacheItem("key", "value", CacheItemPriority.Low, null); itemToRemove.MakeNotEligibleForScavenging(); AddCacheItem("key", itemToRemove); scavenger.DoScavenging(); Assert.AreEqual("", scavengedKeys); }
public void WillRemoveSingleItemFromCache() { CacheCapacityScavengingPolicy scavengingPolicy = new CacheCapacityScavengingPolicy(0); ScavengerTask scavenger = new ScavengerTask(1, scavengingPolicy, this, instrumentationProvider); CacheItem itemToRemove = new CacheItem("key", "value", CacheItemPriority.Low, null); itemToRemove.MakeEligibleForScavenging(); AddCacheItem("key", itemToRemove); scavenger.DoScavenging(); Assert.AreEqual("key", scavengedKeys); }
public void WillScavengeNoItemsIfNumberOfItemsToScavengeIsZero() { CacheItem item1 = new CacheItem("key1", "value1", CacheItemPriority.Low, null); CacheItem item2 = new CacheItem("key2", "value2", CacheItemPriority.Normal, null); CacheItem item3 = new CacheItem("key3", "value3", CacheItemPriority.High, null); AddCacheItem("key1", item1); AddCacheItem("key2", item2); AddCacheItem("key3", item3); ScavengerTask scavenger = new ScavengerTask(0, 2, this, instrumentationProvider); scavenger.DoScavenging(); Assert.AreEqual("", scavengedKeys); }
public void WillScavenge() { CacheItem item1 = new CacheItem("key1", "value1", CacheItemPriority.NotRemovable, null); CacheItem item2 = new CacheItem("key2", "value2", CacheItemPriority.High, null); CacheItem item3 = new CacheItem("key3", "value3", CacheItemPriority.Normal, null); CacheItem item4 = new CacheItem("key4", "value4", CacheItemPriority.Low, null); AddCacheItem("key1", item1); AddCacheItem("key2", item2); AddCacheItem("key3", item3); AddCacheItem("key4", item4); ScavengerTask scavenger = new ScavengerTask(2, 1, this, instrumentationProvider); scavenger.DoScavenging(); Assert.AreEqual("key4key3", scavengedKeys); }
public void WillRemoveSingleItemFromCache() { TestConfigurationContext context = new TestConfigurationContext(); CachingConfigurationView view = new CachingConfigurationView(context); view.GetCacheManagerSettings().CacheManagers["test"].MaximumElementsInCacheBeforeScavenging = 0; CacheCapacityScavengingPolicy scavengingPolicy = new CacheCapacityScavengingPolicy("test", view); ScavengerTask scavenger = new ScavengerTask("test", view, scavengingPolicy, this); CacheItem itemToRemove = new CacheItem("key", "value", CacheItemPriority.Low, null); itemToRemove.MakeEligibleForScavenging(); AddCacheItem("key", itemToRemove); scavenger.DoScavenging(); Assert.AreEqual("key", scavengedKeys); }
public void WillNotScheduleNewScavengeTaskIfOneIsAlreadyScheduled() { inMemoryCacheRequestSemaphore = new EventWaitHandle(false, EventResetMode.ManualReset); CacheItem item1 = new CacheItem("key1", "value1", CacheItemPriority.Low, null); CacheItem item2 = new CacheItem("key2", "value2", CacheItemPriority.Normal, null); CacheItem item3 = new CacheItem("key3", "value3", CacheItemPriority.Normal, null); CacheItem item4 = new CacheItem("key4", "value4", CacheItemPriority.Normal, null); CacheItem item5 = new CacheItem("key5", "value5", CacheItemPriority.High, null); CacheItem item6 = new CacheItem("key6", "value6", CacheItemPriority.High, null); CacheItem item7 = new CacheItem("key7", "value7", CacheItemPriority.High, null); AddCacheItem("key1", item1); AddCacheItem("key2", item2); AddCacheItem("key3", item3); ScavengerTask scavenger = new ScavengerTask(2, 3, this, instrumentationProvider); BackgroundScheduler scheduler = new BackgroundScheduler(null, scavenger, instrumentationProvider); AddCacheItem("key4", item4); // this new scavenge request will be scheduled, it's the first one scheduler.StartScavenging(); // the scavenge request scheduled above would be processed here and will be blocked by the event Thread.Sleep(500); AddCacheItem("key5", item5); // this new scavenge request will be scheduled, because the previously scheduled one will have started scheduler.StartScavenging(); Thread.Sleep(250); AddCacheItem("key6", item6); // this new scavenge request will be ignored scheduler.StartScavenging(); Thread.Sleep(250); AddCacheItem("key7", item7); // this new scavenge request will be ignored scheduler.StartScavenging(); Thread.Sleep(250); bool value = inMemoryCacheRequestSemaphore.Set(); Thread.Sleep(250); // 3 cache requests should be issued: one for "key4" for one element and two for the remaining elements // since at most 2 elements are removed per scavenge Assert.AreEqual(3, inMemoryCacheRequests); }
public void WillRemoveMultipleEligibleForScavenging() { ScavengerTask scavenger = new ScavengerTask(3, 2, this, instrumentationProvider); CacheItem itemToRemove = new CacheItem("key1", "value", CacheItemPriority.High, null); CacheItem itemToRemain = new CacheItem("key2", "value", CacheItemPriority.Low, null); CacheItem itemToRemoveAlso = new CacheItem("key3", "value", CacheItemPriority.Normal, null); itemToRemove.MakeEligibleForScavenging(); itemToRemain.MakeEligibleForScavenging(); itemToRemoveAlso.MakeEligibleForScavenging(); AddCacheItem("key1", itemToRemove); AddCacheItem("key2", itemToRemain); AddCacheItem("key3", itemToRemoveAlso); scavenger.DoScavenging(); Assert.AreEqual("key2key3key1", scavengedKeys); }
public void WillStopRemovingAtLimitForScavenging() { ScavengerTask scavenger = new ScavengerTask(2, 2, this, instrumentationProvider); CacheItem itemToRemove = new CacheItem("key1", "value", CacheItemPriority.High, null); CacheItem itemToRemain = new CacheItem("key2", "value", CacheItemPriority.Low, null); CacheItem itemToRemoveAlso = new CacheItem("key3", "value", CacheItemPriority.Normal, null); itemToRemove.MakeEligibleForScavenging(); itemToRemain.MakeEligibleForScavenging(); itemToRemoveAlso.MakeEligibleForScavenging(); AddCacheItem("key1", itemToRemove); AddCacheItem("key2", itemToRemain); AddCacheItem("key3", itemToRemoveAlso); scavenger.DoScavenging(); Assert.AreEqual("key2key3", scavengedKeys); }
public void WillRemoveMultipleEligibleForScavenging() { CacheCapacityScavengingPolicy scavengingPolicy = new CacheCapacityScavengingPolicy(2); ScavengerTask scavenger = new ScavengerTask(3, scavengingPolicy, this, instrumentationProvider); CacheItem itemToRemove = new CacheItem("key1", "value", CacheItemPriority.High, null); CacheItem itemToRemain = new CacheItem("key2", "value", CacheItemPriority.Low, null); CacheItem itemToRemoveAlso = new CacheItem("key3", "value", CacheItemPriority.Normal, null); itemToRemove.MakeEligibleForScavenging(); itemToRemain.MakeEligibleForScavenging(); itemToRemoveAlso.MakeEligibleForScavenging(); AddCacheItem("key1", itemToRemove); AddCacheItem("key2", itemToRemain); AddCacheItem("key3", itemToRemoveAlso); scavenger.DoScavenging(); Assert.AreEqual("key2key3key1", scavengedKeys); }
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 RemovalFailureDuringCacheScavengingDoesFireEvents() { ICacheOperations cacheOperations = new FailingOnRemovalCacheOperations(); CacheItem item = new CacheItem(key1, new object(), CacheItemPriority.Low, null); cacheOperations.CurrentCacheState.Add(key1, item); cacheOperations.CurrentCacheState.Add("differentKey", item); ScavengerTask scavenging = new ScavengerTask(1, new CacheCapacityScavengingPolicy(1), cacheOperations, instrumentationProvider); scavenging.DoScavenging(); // two events for each of the items failing to be scavenged, and one for the announcement // that scavenging is finished with 0 items scavenged. Assert.AreEqual(3, instrumentationListener.eventArgs.Count); IList <CacheScavengedEventArgs> scavenges = FilterEventArgs <CacheScavengedEventArgs>(instrumentationListener.eventArgs); IList <CacheFailureEventArgs> failures = FilterEventArgs <CacheFailureEventArgs>(instrumentationListener.eventArgs); Assert.AreEqual(1, scavenges.Count); Assert.AreEqual(2, failures.Count); }
public void CacheScavengeDoesFireEvents() { ICacheOperations cacheOperations = new MockCacheOperations(); CacheItem item1 = new CacheItem(key1, new object(), CacheItemPriority.Low, null); cacheOperations.CurrentCacheState.Add(key1, item1); CacheItem item2 = new CacheItem(key2, new object(), CacheItemPriority.Low, null); cacheOperations.CurrentCacheState.Add(key2, item2); CacheItem item3 = new CacheItem(key3, new object(), CacheItemPriority.NotRemovable, null); cacheOperations.CurrentCacheState.Add(key3, item3); ScavengerTask scavenging = new ScavengerTask(2, new CacheCapacityScavengingPolicy(2), cacheOperations, instrumentationProvider); scavenging.DoScavenging(); Assert.AreEqual(1, instrumentationListener.eventArgs.Count); IList <CacheScavengedEventArgs> scavenges = FilterEventArgs <CacheScavengedEventArgs>(instrumentationListener.eventArgs); Assert.AreEqual(1, scavenges.Count); Assert.AreEqual(2L, scavenges[0].ItemsScavenged); }
public void WillStopRemovingAtLimitForScavenging() { CacheCapacityScavengingPolicy scavengingPolicy = new CacheCapacityScavengingPolicy(2); ScavengerTask scavenger = new ScavengerTask(2, scavengingPolicy, this, instrumentationProvider); CacheItem itemToRemove = new CacheItem("key1", "value", CacheItemPriority.High, null); CacheItem itemToRemain = new CacheItem("key2", "value", CacheItemPriority.Low, null); CacheItem itemToRemoveAlso = new CacheItem("key3", "value", CacheItemPriority.Normal, null); itemToRemove.MakeEligibleForScavenging(); itemToRemain.MakeEligibleForScavenging(); itemToRemoveAlso.MakeEligibleForScavenging(); AddCacheItem("key1", itemToRemove); AddCacheItem("key2", itemToRemain); AddCacheItem("key3", itemToRemoveAlso); scavenger.DoScavenging(); Assert.AreEqual("key2key3", scavengedKeys); }
public void WillNotDieIfNotEnoughItemsToScavenge() { TestConfigurationContext context = new TestConfigurationContext(); CachingConfigurationView view = new CachingConfigurationView(context); view.GetCacheManagerSettings().CacheManagers["test"].MaximumElementsInCacheBeforeScavenging = 2; view.GetCacheManagerSettings().CacheManagers["test"].NumberToRemoveWhenScavenging = 4; CacheCapacityScavengingPolicy scavengingPolicy = new CacheCapacityScavengingPolicy("test", view); ScavengerTask scavenger = new ScavengerTask("test", view, scavengingPolicy, this); CacheItem itemToRemove = new CacheItem("key1", "value", CacheItemPriority.High, null); CacheItem itemToRemain = new CacheItem("key2", "value", CacheItemPriority.Low, null); CacheItem itemToRemoveAlso = new CacheItem("key3", "value", CacheItemPriority.Normal, null); itemToRemove.MakeEligibleForScavenging(); itemToRemain.MakeEligibleForScavenging(); itemToRemoveAlso.MakeEligibleForScavenging(); AddCacheItem("key1", itemToRemove); AddCacheItem("key2", itemToRemain); AddCacheItem("key3", itemToRemoveAlso); scavenger.DoScavenging(); Assert.AreEqual("key2key3key1", scavengedKeys); }
/// <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; }