public void TestTwoLevelCache()
{
var hundredBytes = new byte[100];
ICache primary = new MemoryCache(500, new LruCacheEvictionPolicy(), 400, 300);
ICache secondary = new MemoryCache(1000, new LruCacheEvictionPolicy(), 900, 700);
ICache cache = new TwoLevelCache(primary, secondary);
for (int i = 0; i < 9; i++)
{
cache.Insert("Entry " + i, hundredBytes, CachePriority.Normal);
Thread.Sleep(20);
}
for (int i = 0; i < 9; i++)
{
Assert.IsTrue(secondary.ContainsKey("Entry " + i), "Expected secondary cache to contain Entry {0} after initialization");
if (i < 5)
{
Assert.IsFalse(primary.ContainsKey("Entry " + i), "Expected primary cache to NOT contain Entry {0} after initialization", i);
}
else
{
Assert.IsTrue(primary.ContainsKey("Entry " + i), "Expected primary cache to contain Entry {0} after initialization", i);
}
}
cache.Insert("Entry 10", hundredBytes, CachePriority.Normal);
Assert.IsFalse(cache.ContainsKey("Entry 0"));
Assert.IsFalse(cache.ContainsKey("Entry 1"));
Assert.IsTrue(cache.ContainsKey("Entry 2"));
Assert.IsTrue(cache.ContainsKey("Entry 10"));
Assert.IsTrue(primary.ContainsKey("Entry 10"));
Assert.IsTrue(secondary.ContainsKey("Entry 10"));
}
public void TestCacheCleanupBiggerThanCacheSize()
{
MemoryCache <string, int> cache = new MemoryCache <string, int>(1, 3);
cache.GetOrAdd("test1", k => 1);
cache.GetOrAdd("test2", k => 2);
cache.GetOrAdd("test3", k => 3);
#if !NETCORE
Assert.IsTrue(cache.ContainsKey("test3"));
Assert.AreEqual(1, cache.Count);
#else
Assert.True(cache.ContainsKey("test3"));
Assert.Equal(1, cache.Count);
#endif
}
public void TestCacheCleanupOnlyAdd()
{
MemoryCache <string, int> cache = new MemoryCache <string, int>(3, 1);
cache.GetOrAdd("test1", k => 1);
cache.GetOrAdd("test2", k => 2);
cache.GetOrAdd("test3", k => 3);
cache.GetOrAdd("test4", k => 3);
#if !NETCORE
Assert.IsFalse(cache.ContainsKey("test1"));
Assert.AreEqual(3, cache.Count);
#else
Assert.False(cache.ContainsKey("test1"));
Assert.Equal(3, cache.Count);
#endif
}
public void LimitTest1()
{
IMemoryCache cache = new MemoryCache(
new MemoryCacheOptions()
{
EntriesSizeLimit = 3,
});
cache.CreateEntry(1).SetPriority(CacheItemPriority.NeverRemove);
cache.CreateEntry(2).SetPriority(CacheItemPriority.Low);
cache.CreateEntry(3).SetPriority(CacheItemPriority.Normal);
cache.CreateEntry(4).SetPriority(CacheItemPriority.Normal);
Assert.False(cache.ContainsKey(2));
Assert.True(cache.ContainsKey(1));
Assert.True(cache.ContainsKey(3));
Assert.True(cache.ContainsKey(4));
Assert.True(cache.TrySet(5, new CacheEntry(5)));
}
public void TestCacheCleanupBiggerThanCacheSize()
{
MemoryCache<string, int> cache = new MemoryCache<string, int>(1, 3);
cache.GetOrAdd("test1", k => 1);
cache.GetOrAdd("test2", k => 2);
cache.GetOrAdd("test3", k => 3);
Assert.IsTrue(cache.ContainsKey("test3"));
Assert.AreEqual(1, cache.Count);
}
public void TestCacheCleanupOnlyAdd()
{
MemoryCache<string, int> cache = new MemoryCache<string, int>(3, 1);
cache.GetOrAdd("test1", k => 1);
cache.GetOrAdd("test2", k => 2);
cache.GetOrAdd("test3", k => 3);
cache.GetOrAdd("test4", k => 3);
Assert.IsFalse(cache.ContainsKey("test1"));
Assert.AreEqual(3, cache.Count);
}
public void TestCacheCleanupRetrieve()
{
MemoryCache <string, int> cache = new MemoryCache <string, int>(3, 1);
cache.GetOrAdd("test1", k => 1);
cache.GetOrAdd("test2", k => 2);
cache.GetOrAdd("test3", k => 3);
Assert.AreEqual(1, cache["test1"]);
cache.GetOrAdd("test4", k => 3);
Assert.IsTrue(cache.ContainsKey("test1"));
Assert.AreEqual(3, cache.Count);
}
/// <summary>
/// MemoryCache 获取或创建
/// </summary>
/// <typeparam name="TResult"></typeparam>
/// <param name="key"></param>
/// <param name="action"></param>
/// <param name="expire">缓存时间秒，小于0时使用默认缓存时间</param>
/// <returns></returns>
public static TResult GetCache <TResult>(string key, Func <TResult> action, int expire = -1)
{
TResult result = default(TResult);
//1.0 从缓存中取KEY对应的数据，如果不存在则使用action回调获取，并缓存起来
if (MemoryCache.ContainsKey(key))
{
return(MemoryCache.Get <TResult>(key));
}
else
{
result = action();
MemoryCache.Set <TResult>(key, result, expire);
return(result);
}
}
public void GetCollectionTest1()
{
IMemoryCache cache = new MemoryCache(new MemoryCacheOptions());
cache.CreateEntry(1);
cache.CreateEntry(2);
cache.CreateEntry(3);
var collection = cache.GetCacheCollection();
cache.Remove(1);
Assert.NotEmpty(collection);
Assert.Equal(3, collection.Count());
Assert.False(cache.ContainsKey(1));
}
public void TestQueryCacheInsertAndInvalidation()
{
var testCache = new MemoryCache(8192, new LruCacheEvictionPolicy());
var client = GetClient(testCache);
var storeName = "Client.TestQueryCacheInvalidation_" + DateTime.Now.Ticks;
client.CreateStore(storeName);
const string query = "SELECT ?s WHERE { ?s ?p ?o }";
client.ExecuteQuery(storeName, query);
var cacheKey = storeName + "_" + query.GetHashCode() + "_" + SparqlResultsFormat.Xml;
Assert.IsTrue(testCache.ContainsKey(cacheKey));
testCache.Insert(cacheKey, new CachedQueryResult(DateTime.UtcNow, "This is a test"), CachePriority.Normal);
var resultStream = client.ExecuteQuery(storeName, query);
string result;
using (var resultReader = new StreamReader(resultStream))
{
result = resultReader.ReadToEnd();
}
Assert.AreEqual("This is a test", result);
Thread.Sleep(1000); // Allow for resolution of Last-Modified header
client.ExecuteTransaction(storeName,
new UpdateTransactionData
{
InsertData =
"<http://example.org/s> <http://example.org/p> <http://example.org/o> ."
});
resultStream = client.ExecuteQuery(storeName, query);
using (var resultReader = new StreamReader(resultStream))
{
result = resultReader.ReadToEnd();
}
// We should not get the test result we inserted into the cache this time.
Assert.AreNotEqual("This is a test", result);
// The cache should have been updated with the result received from the server.
var cacheResult = testCache.Lookup <CachedQueryResult>(cacheKey);
Assert.AreEqual(result, cacheResult.Result);
}
public void TestValueIsNotInCache()
{
var hasherMock = new Mock <IHasher>();
hasherMock.Setup(h => h.GetHash(It.IsAny <IMessage>()))
.Returns("non-existing-hash");
var cache = new MemoryCache(hasherMock.Object);
var key = new Message <string>(MessageLabel.From("label"), "payload");
var containsCachedValue = cache.ContainsKey(key);
var cachedValue = containsCachedValue ? cache[key] : null;
Assert.IsFalse(containsCachedValue, "cache should not contain value not cached before");
Assert.IsNull(cachedValue, "value for not cached key should be null'");
// teardown because of using MemoryCache.Default
cache.Set(key, string.Empty, TimeSpan.Zero);
}
public void TestCacheIsSet()
{
var hasherMock = new Mock <IHasher>();
hasherMock.Setup(h => h.GetHash(It.IsAny <IMessage>()))
.Returns("hash");
var cache = new MemoryCache(hasherMock.Object);
var key = new Message <string>(MessageLabel.From("label"), "payload");
var value = "value";
cache.Set(key, value, TimeSpan.FromMinutes(1.0));
var containsCachedValue = cache.ContainsKey(key);
var cachedValue = containsCachedValue ? cache[key] : null;
Assert.IsTrue(containsCachedValue, "cache should contain cached value");
Assert.AreEqual(value, cachedValue, $"cached value should be equal to '{value}'");
// teardown because of using MemoryCache.Default
cache.Set(key, string.Empty, TimeSpan.Zero);
}
public void GetCollectionTest2()
{
IMemoryCache cache = new MemoryCache(new MemoryCacheOptions()
{
ExpirationScanFrequency = TimeSpan.FromSeconds(1)
});
cache.CreateEntry(1).SetAbsoluteExpiration(TimeSpan.FromSeconds(1));
var beforeCollection = cache.GetCacheCollection();
Thread.Sleep(1500);
// HACK: deletion of entities happens in the background so the first result can be TRUE
if (cache.ContainsKey(1))
{
Thread.Sleep(500);
}
var afterCollection = cache.GetCacheCollection();
Assert.NotNull(beforeCollection.FirstOrDefault(o => o.Key.Equals(1)));
Assert.Null(afterCollection.FirstOrDefault(o => o.Key.Equals(1)));
}
public void TestLruPolicy()
{
var hundredBytes = new byte[100];
ICache cache = new MemoryCache(1000, new LruCacheEvictionPolicy(), 900, 700);
for (int i = 0; i < 9; i++)
{
cache.Insert("Entry " + i, hundredBytes, CachePriority.Normal);
Thread.Sleep(20);
}
// Cache size is now 900 bytes
cache.Insert("Entry 10", hundredBytes, CachePriority.Normal);
Assert.IsFalse(cache.ContainsKey("Entry 0"));
Assert.IsFalse(cache.ContainsKey("Entry 1"));
Assert.IsTrue(cache.ContainsKey("Entry 2"));
Assert.IsTrue(cache.ContainsKey("Entry 10"));
// Cache size should now be 800 bytes
cache.Lookup("Entry 2");
cache.Insert("Entry 11", hundredBytes, CachePriority.Normal);
cache.Insert("Entry 12", hundredBytes, CachePriority.Normal); // This insert should force eviction
Assert.IsFalse(cache.ContainsKey("Entry 0")); // was previously evicted
Assert.IsFalse(cache.ContainsKey("Entry 1")); // was previously evicted
Assert.IsTrue(cache.ContainsKey("Entry 2"), "Expected Entry2 to remain in cache after second eviction"); // Won't be evicted due to recent access
Assert.IsFalse(cache.ContainsKey("Entry 3")); // newly evicted
Assert.IsFalse(cache.ContainsKey("Entry 4")); // newly evicted
Assert.IsTrue(cache.ContainsKey("Entry 5"), "Expected Entry 5 to remain in cache after second eviction"); // shouldn't be evicted
Assert.IsTrue(cache.ContainsKey("Entry 11"), "Expected Entry 11 to remain in cache after second eviction"); // should have been added before eviction
Assert.IsTrue(cache.ContainsKey("Entry 12"), "Expected Entry 12 to be added to cache after second eviction"); // should have been added after eviction
}
public void TestLruPriority()
{
var hundredBytes = new byte[100];
ICache cache = new MemoryCache(1000, new LruCacheEvictionPolicy(), 900, 700);
for (int i = 0; i < 9; i++)
{
cache.Insert("Entry " + i, hundredBytes, i % 2 == 0 ? CachePriority.High : CachePriority.Normal);
Thread.Sleep(20);
}
// Cache size is now 900 bytes
cache.Insert("Entry 10", hundredBytes, CachePriority.High);
Assert.IsTrue(cache.ContainsKey("Entry 0"), "Expected Entry 0 to remain after first eviction");
Assert.IsFalse(cache.ContainsKey("Entry 1"), "Expected Entry 1 to be removed after first eviction");
Assert.IsTrue(cache.ContainsKey("Entry 2"), "Expected Entry 2 to remain after first eviction");
Assert.IsFalse(cache.ContainsKey("Entry 3"), "Expected Entry 3 to be removed after first eviction");
Assert.IsTrue(cache.ContainsKey("Entry 4"));
Assert.IsTrue(cache.ContainsKey("Entry 5"));
Assert.IsTrue(cache.ContainsKey("Entry 10"));
cache.Insert("Entry 11", hundredBytes, CachePriority.High);
cache.Insert("Entry 12", hundredBytes, CachePriority.High);
Assert.IsFalse(cache.ContainsKey("Entry 5"), "Expected Entry 5 to be removed after second eviction");
Assert.IsFalse(cache.ContainsKey("Entry 7"), "Expected Entry 7 to be removed after second eviction");
Assert.IsNotNull(cache.Lookup("Entry 2"));
cache.Insert("Entry 13", hundredBytes, CachePriority.High);
cache.Insert("Entry 14", hundredBytes, CachePriority.High);
Assert.IsFalse(cache.ContainsKey("Entry 0")); // Should now start evicting high priority items
Assert.IsTrue(cache.ContainsKey("Entry 2"), "Expected Entry 2 to remain after third eviction due to recent access");
Assert.IsFalse(cache.ContainsKey("Entry 4"), "Expected Entry 4 to be removed after third eviction");
}
private bool IsInFormulaCache(string formulaText)
{
return(cacheEnabled && executionFormulaCache.ContainsKey(formulaText));
}
