static void Main()
{
//check one - basic LazyCache
IAppCache cache = new CachingService(CachingService.DefaultCacheProvider);
var item = cache.GetOrAdd("Program.Main.Person", () => Tuple.Create("Joe Blogs", DateTime.UtcNow));
System.Console.WriteLine(item.Item1);
//check two - using Ninject
IKernel kernel = new StandardKernel(new LazyCacheModule());
cache = kernel.Get <IAppCache>();
item = cache.GetOrAdd("Program.Main.Person", () => Tuple.Create("Joe Blogs", DateTime.UtcNow));
System.Console.WriteLine(item.Item1);
System.Console.WriteLine("Enumerating keys...");
foreach (var key in cache.GetCacheKeys().Keys)
{
System.Console.WriteLine($"{key}");
}
System.Console.WriteLine("Finished enumerating keys...");
System.Console.ReadLine();
}
public void GetOrAddWithPolicyWillAddOnFirstCallButReturnCachedOnSecond()
{
var times = 0;
var sut = new CachingService();
var expectedFirst = sut.GetOrAdd(TestKey, () =>
{
times++;
return(new DateTime(2001, 01, 01));
}, new CacheItemPolicy {
AbsoluteExpiration = DateTimeOffset.Now.AddHours(1), Priority = CacheItemPriority.NotRemovable
});
var expectedSecond = sut.GetOrAdd(TestKey, () =>
{
times++;
return(new DateTime(2002, 01, 01));
}, new CacheItemPolicy {
AbsoluteExpiration = DateTimeOffset.Now.AddHours(1), Priority = CacheItemPriority.NotRemovable
});
Assert.AreEqual(2001, expectedFirst.Year);
Assert.AreEqual(2001, expectedSecond.Year);
Assert.AreEqual(1, times);
}
public JsonNetResult GetActiveFranchises()
{
List <FranchiseSelectViewModel> _listFranchises = new List <FranchiseSelectViewModel>();
IAppCache cache = new CachingService();
_listFranchises = cache.GetOrAdd("Active_Franchises", () => GetActiveFranchisesPrivate(), new TimeSpan(8, 0, 0));
if (_listFranchises == null || _listFranchises.Count == 0)
{
LogHelper log = new LogHelper();
log.Log(LogHelper.LogLevels.Warning, "Error loading active franchises - Franchise cache will be reset and attempted again", nameof(GetActiveFranchises));
cache.Remove("Active_Franchises");
_listFranchises = cache.GetOrAdd("Active_Franchises", () => GetActiveFranchisesPrivate(), new TimeSpan(8, 0, 0));
}
if (_listFranchises == null || _listFranchises.Count == 0)
{
throw new ApplicationException($"Active franchise list could not be loaded.");
}
return(new JsonNetResult()
{
Data = new { list = _listFranchises }, JsonRequestBehavior = JsonRequestBehavior.AllowGet
});
}
public static ChartValues <int> totaleCasi(DateTime start, DateTime end, string region)
{
ChartValues <int> filtered = new ChartValues <int>();
IAppCache cache = new CachingService();
Func <List <Dati> > getData = () => ReadCSV();
var records = cache.GetOrAdd("italia.Get", getData);
if (region == "Italia")
{
records = cache.GetOrAdd("italia.Get", getData);
}
else
{
records = cache.GetOrAdd("regioni.Get", getData);
}
foreach (var record in records)
{
var filter = records[records.Count - 1];
if (DateTime.Compare(record.data, start) == 0 | DateTime.Compare(record.data, start) == 1)
{
if (DateTime.Compare(record.data, end) == 0 | DateTime.Compare(record.data, end) == -1)
{
if (record.regione == region)
{
filtered.Add(record.totaleCasi);
}
}
}
}
return(filtered);
}
public void GetFromCacheTwiceAtSameTimeOnlyAddsOnce()
{
var times = 0;
var sut = new CachingService();
var t1 = Task.Factory.StartNew(() =>
{
sut.GetOrAdd(TestKey, () =>
{
Interlocked.Increment(ref times);
return(new DateTime(2001, 01, 01));
});
});
var t2 = Task.Factory.StartNew(() =>
{
sut.GetOrAdd(TestKey, () =>
{
Interlocked.Increment(ref times);
return(new DateTime(2001, 01, 01));
});
});
Task.WaitAll(t1, t2);
Assert.AreEqual(1, times);
}
public void LazyCache_MemoryProvider()
{
Parallel.For(0, ParallelIterations, i =>
{
LazyCache.GetOrAdd("GetOrSet_TestKey", () => "Hello World", TimeSpan.FromDays(1));
});
}
public void OnlyOneFactoryGetsCalledEvenInHighConcurrency(int accessorsCount)
{
using (var memoryCache = new MemoryCache(new MemoryCacheOptions()))
{
var cache = new CachingService(new MemoryCacheProvider(memoryCache));
cache.DefaultCachePolicy = new CacheDefaults {
DefaultCacheDurationSeconds = 10
};
var factoryCallsCount = 0;
Parallel.For(0, accessorsCount, _ =>
{
cache.GetOrAdd <int>(
"foo",
_ =>
{
Interlocked.Increment(ref factoryCallsCount);
Thread.Sleep(FactoryDuration);
return(42);
}
);
});
Assert.Equal(1, factoryCallsCount);
}
}
public void LazyCache()
{
using (var cache = new MemoryCache(new MemoryCacheOptions()))
{
var appcache = new CachingService(new MemoryCacheProvider(cache));
appcache.DefaultCachePolicy = new CacheDefaults {
DefaultCacheDurationSeconds = (int)(CacheDuration.TotalSeconds)
};
for (int i = 0; i < Rounds; i++)
{
var tasks = new ConcurrentBag <Task>();
Parallel.ForEach(Keys, key =>
{
Parallel.For(0, Accessors, _ =>
{
appcache.GetOrAdd <SamplePayload>(
key,
() =>
{
Thread.Sleep(FactoryDurationMs);
return(new SamplePayload());
}
);
});
});
}
// CLEANUP
cache.Compact(1);
}
}
public static List <Dati> Filtered(DateTime date)
{
List <Dati> filtered = new List <Dati>();
IAppCache cache = new CachingService();
Func <List <Dati> > getData = () => ReadCSV();
var records = cache.GetOrAdd("italia.Get", getData, TimeSpan.FromMinutes(10));
foreach (var record in records)
{
var filter = records[records.Count - 1];
filtered.Add(filter);
if (record.data.ToString("dd MMMM yyyy") == date.ToString("dd MMMM yyyy"))
{
filter = record;
filtered.Clear();
filtered.Add(filter);
}
}
return(filtered);
}
static void Main(string[] args)
{
//check one - basic LazyCache
IAppCache cache = new CachingService(CachingService.DefaultCacheProvider);
var item = cache.GetOrAdd("Program.Main.Person", () => Tuple.Create("Joe Blogs", DateTime.UtcNow));
System.Console.WriteLine(item.Item1);
//check two - using Ninject
IKernel kernel = new StandardKernel(new LazyCacheModule());
cache = kernel.Get <IAppCache>();
item = cache.GetOrAdd("Program.Main.Person", () => Tuple.Create("Joe Blogs", DateTime.UtcNow));
System.Console.WriteLine(item.Item1);
}
public void GetOrAddAndThenGetValueObjectReturnsCorrectType()
{
var sut = new CachingService();
Func <int> fetch = () => 123;
sut.GetOrAdd(TestKey, fetch);
var actual = sut.Get <int>(TestKey);
Assert.AreEqual(123, actual);
}
public void GetOrAddAndThenGetWrongtypeObjectReturnsNull()
{
var sut = new CachingService();
Func <ComplexTestObject> fetch = () => new ComplexTestObject();
sut.GetOrAdd(TestKey, fetch);
var actual = sut.Get <Exception>(TestKey);
Assert.IsNull(actual);
}
public void GetOrAddAndThenGetObjectReturnsCorrectType()
{
var sut = new CachingService();
Func <ComplexTestObject> fetch = () => new ComplexTestObject();
sut.GetOrAdd(TestKey, fetch);
var actual = sut.Get <ComplexTestObject>(TestKey);
Assert.IsNotNull(actual);
}
public JsonResult GetSearchSuburbs()
{
IAppCache cache = new CachingService();
List <String> suburbs = (List <string>)cache.GetOrAdd("SuburbNames", () => GetSuburbNames(), new TimeSpan(1, 0, 0));
return(new JsonNetResult()
{
Data = new { item = suburbs }, JsonRequestBehavior = JsonRequestBehavior.AllowGet
});
}
public JsonResult GetSettings(int?incDisabled)
{
List <UpdateSettingsViewModel> _editSettings = new List <UpdateSettingsViewModel>();
IAppCache cache = new CachingService();
if (incDisabled != null && incDisabled == 1)
{
_editSettings = cache.GetOrAdd("System_Settings_All", () => GetSettingsPrivate(incDisabled), new TimeSpan(1, 0, 0));
}
else
{
_editSettings = cache.GetOrAdd("System_Settings_Active", () => GetSettingsPrivate(incDisabled), new TimeSpan(1, 0, 0));
}
return(new JsonNetResult()
{
Data = new { list = _editSettings }, JsonRequestBehavior = JsonRequestBehavior.AllowGet
});
}
public void LazyCache_MemoryProvider()
{
var lazyCache = new CachingService();
LoopAction(Iterations, () =>
{
lazyCache.Add("TestKey", 123, TimeSpan.FromDays(1));
lazyCache.Get <int>("TestKey");
lazyCache.GetOrAdd("TestKey", () => "Hello World", TimeSpan.FromDays(1));
});
}
private IAppCache CreateLazyCache()
{
var cache = new CachingService();
foreach ((Guid key, int value) in Data)
{
cache.GetOrAdd(key.ToString(), () => value, TimeSpan.FromHours(1));
}
return(cache);
}
public void DefaultContructorThenGetOrAddFromSecondCachingServiceHasSharedUnderlyingCache()
{
var cacheOne = new CachingService();
var cacheTwo = new CachingService();
var resultOne = cacheOne.GetOrAdd(TestKey, () => "resultOne");
var resultTwo = cacheTwo.GetOrAdd(TestKey, () => "resultTwo"); // should not get executed
resultOne.Should().Be("resultOne", "GetOrAdd should execute the delegate");
resultTwo.Should().Be("resultOne", "CachingService should use a shared cache by default");
}
public void GetOrAddWithPolicyAndThenGetObjectReturnsCorrectType()
{
var sut = new CachingService();
Func <ComplexTestObject> fetch = () => new ComplexTestObject();
sut.GetOrAdd(TestKey, fetch, new CacheItemPolicy {
AbsoluteExpiration = DateTimeOffset.Now.AddHours(1), Priority = CacheItemPriority.NotRemovable
});
var actual = sut.Get <ComplexTestObject>(TestKey);
Assert.IsNotNull(actual);
}
public void GetOrAddWillAddOnFirstCallButReturnCachedOnSecond()
{
var times = 0;
var sut = new CachingService();
var expectedFirst = sut.GetOrAdd(TestKey, () =>
{
times++;
return(new DateTime(2001, 01, 01));
});
var expectedSecond = sut.GetOrAdd(TestKey, () =>
{
times++;
return(new DateTime(2002, 01, 01));
});
Assert.AreEqual(2001, expectedFirst.Year);
Assert.AreEqual(2001, expectedSecond.Year);
Assert.AreEqual(1, times);
}
/// <summary>
/// Returns list of zones for a given suburb
/// </summary>
/// <returns>The zone list by suburb.</returns>
/// <param name="suburbName">Suburb name.</param>
public static List <string> GetZoneListBySuburb(this string suburbName, Boolean withDefaults)
{
if (String.IsNullOrWhiteSpace(suburbName))
{
return(new List <string>());
}
IAppCache cache = new CachingService();
List <string> zoneList = cache.GetOrAdd($"SuburbZones_{suburbName}", () => GetZoneList(suburbName), new TimeSpan(0, 20, 0));
if (zoneList.Count == 0)
{
cache.Remove($"SuburbZones_{suburbName}");
if (withDefaults)
{
zoneList = cache.GetOrAdd($"SuburbZones_Defaults", () => GetDefaultZoneList(), new TimeSpan(0, 20, 0));
}
}
return(zoneList);
}
public void GetOrAddWithPolicyAndThenGetValueObjectReturnsCorrectType()
{
var sut = new CachingService();
Func <int> fetch = () => 123;
sut.GetOrAdd(TestKey, fetch, new CacheItemPolicy {
AbsoluteExpiration = DateTimeOffset.Now.AddHours(1), Priority = CacheItemPriority.NotRemovable
});
var actual = sut.Get <int>(TestKey);
Assert.AreEqual(123, actual);
}
public JsonResult GetComputerName(string computerName)
{
var userDevices = new UserDevices(User.Identity.Name);
// Cache has a default time limit of 20 minutes, so will get new results every 20 minutes
IAppCache cache = new CachingService();
Func <List <string> > complexObjectFactory = () => userDevices.GetDevices();
List <string> fullDeviceList = cache.GetOrAdd("CMComputerList", complexObjectFactory);
var returnList = fullDeviceList.Where(p => p.ToLower().Contains(computerName.ToLower())); //.Select(p => new { label = p });
return(Json(returnList.Take(50), JsonRequestBehavior.AllowGet));
}
public JsonNetResult GetAddressTypesJson()
{
var enumVals = new List <object>();
IAppCache cache = new CachingService();
enumVals = cache.GetOrAdd("address_types", () => GetAddressTypes(), new TimeSpan(8, 0, 0));
return(new JsonNetResult()
{
Data = new { item = enumVals }, JsonRequestBehavior = JsonRequestBehavior.AllowGet
});
}
private Author PollAuthor(string foreignAuthorId)
{
return(_authorCache.GetOrAdd(foreignAuthorId,
() => PollAuthorUncached(foreignAuthorId),
new LazyCacheEntryOptions
{
AbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(10),
ImmediateAbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(10),
Size = 1,
SlidingExpiration = TimeSpan.FromMinutes(1),
ExpirationMode = ExpirationMode.ImmediateEviction
}.RegisterPostEvictionCallback((key, value, reason, state) => _logger.Debug($"Clearing cache for {key} due to {reason}"))));
}
public KerberosReceiverSecurityToken WriteToCache(string contextUsername, string contextPassword)
{
KerberosSecurityTokenProvider provider =
new KerberosSecurityTokenProvider("YOURSPN",
TokenImpersonationLevel.Impersonation,
new NetworkCredential(contextUsername.ToLower(), contextPassword, "yourdomain"));
KerberosRequestorSecurityToken requestorToken = provider.GetToken(TimeSpan.FromMinutes(double.Parse(ConfigurationManager.AppSettings["KerberosTokenExpiration"]))) as KerberosRequestorSecurityToken;
KerberosReceiverSecurityToken receiverToken = new KerberosReceiverSecurityToken(requestorToken.GetRequest());
IAppCache appCache = new CachingService();
KerberosReceiverSecurityToken tokenFactory() => receiverToken;
return(appCache.GetOrAdd(contextUsername.ToLower(), tokenFactory)); // this will either add the token or get the token if it exists
}
protected IEnumerable <T> GetList <T>(TimeSpan time)
{
IEnumerable <T> results = new List <T>();
String cacheName = (typeof(T)).ToString();
if (String.IsNullOrWhiteSpace(cacheName))
{
return(results);
}
IAppCache cache = new CachingService();
return(cache.GetOrAdd(cacheName, () => GetListFromDb <T>(), time));
}
public void GetOrAddWithOffsetWillAddAndReturnCached()
{
var sut = new CachingService();
var expectedFirst = sut.GetOrAdd(
TestKey,
() => new DateTime(2001, 01, 01),
DateTimeOffset.Now.AddSeconds(5)
);
var expectedSecond = sut.Get <DateTime>(TestKey);
Assert.AreEqual(2001, expectedFirst.Year);
Assert.AreEqual(2001, expectedSecond.Year);
}
//https://codeshare.co.uk/blog/how-to-show-utc-time-relative-to-the-users-local-time-on-a-net-website/
private static IEnumerable <String> GetTimeZonesByCountry()
{
String countryCode = UserCountryCode();
IAppCache cache = new CachingService();
IEnumerable <String> zoneIds = cache.GetOrAdd($"dateTimeZoneList-{countryCode}", () => GetTimeZonesByCountryPrivate(countryCode), new TimeSpan(0, 30, 0));
if (zoneIds == null || zoneIds.Count() == 0)
{
cache.Remove($"dateTimeZoneList-{countryCode}");
return(new List <String>());
}
return(zoneIds.ToList());
}
// TimeZone from browser
internal static DateTimeZone GetDateTimeZone()
{
String countryCode = UserCountryCode();
IAppCache cache = new CachingService();
DateTimeZone TimeZone = cache.GetOrAdd($"dateTimeZone-{countryCode}", () => GetDateTimeZonePrivate(), new TimeSpan(0, 30, 0));
if (TimeZone == null)
{
// set default time zone
TimeZone = DateTimeZoneProviders.Tzdb.GetSystemDefault();
}
return(TimeZone);
}
public void GetOrAddWillNotAddIfExistingData()
{
var times = 0;
var sut = new CachingService();
var cached = new DateTime(1999, 01, 01);
sut.Add(TestKey, cached);
var expected = sut.GetOrAdd(TestKey, () =>
{
times++;
return new DateTime(2001, 01, 01);
});
Assert.AreEqual(1999, expected.Year);
Assert.AreEqual(0, times);
}
public void GetOrAddWithPolicyWithCallbackOnRemovedReturnsTheOriginalCachedObject()
{
var sut = new CachingService();
Func<int> fetch = () => 123;
CacheEntryRemovedArguments removedCallbackArgs = null;
CacheEntryRemovedCallback callback = (args) => removedCallbackArgs = args;
sut.GetOrAdd(TestKey, fetch, new CacheItemPolicy { AbsoluteExpiration = DateTimeOffset.Now.AddMilliseconds(100), RemovedCallback = callback});
var actual = sut.Get<int>(TestKey);
sut.Remove(TestKey); //force removed callback to fire
while(removedCallbackArgs == null)
Thread.Sleep(500);
Assert.AreEqual(123, removedCallbackArgs.CacheItem.Value);
}
public void GetOrAddAndThenGetObjectReturnsCorrectType()
{
var sut = new CachingService();
Func<ComplexTestObject> fetch = () => new ComplexTestObject();
sut.GetOrAdd(TestKey, fetch);
var actual = sut.Get<ComplexTestObject>(TestKey);
Assert.IsNotNull(actual);
}
public void GetOrAddWillAddOnFirstCallButReturnCachedOnSecond()
{
var times = 0;
var sut = new CachingService();
var expectedFirst = sut.GetOrAdd(TestKey, () =>
{
times++;
return new DateTime(2001, 01, 01);
});
var expectedSecond = sut.GetOrAdd(TestKey, () =>
{
times++;
return new DateTime(2002, 01, 01);
});
Assert.AreEqual(2001, expectedFirst.Year);
Assert.AreEqual(2001, expectedSecond.Year);
Assert.AreEqual(1, times);
}
public void GetOrAddAndThenGetValueObjectReturnsCorrectType()
{
var sut = new CachingService();
Func<int> fetch = () => 123;
sut.GetOrAdd(TestKey, fetch);
var actual = sut.Get<int>(TestKey);
Assert.AreEqual(123, actual);
}
public void GetOrAddWithPolicyAndThenGetValueObjectReturnsCorrectType()
{
var sut = new CachingService();
Func<int> fetch = () => 123;
sut.GetOrAdd(TestKey, fetch, new CacheItemPolicy {AbsoluteExpiration = DateTimeOffset.Now.AddHours(1), Priority = CacheItemPriority.NotRemovable});
var actual = sut.Get<int>(TestKey);
Assert.AreEqual(123, actual);
}
public void GetOrAddWithPolicyWillAddOnFirstCallButReturnCachedOnSecond()
{
var times = 0;
var sut = new CachingService();
var expectedFirst = sut.GetOrAdd(TestKey, () =>
{
times++;
return new DateTime(2001, 01, 01);
}, new CacheItemPolicy {AbsoluteExpiration = DateTimeOffset.Now.AddHours(1), Priority = CacheItemPriority.NotRemovable});
var expectedSecond = sut.GetOrAdd(TestKey, () =>
{
times++;
return new DateTime(2002, 01, 01);
}, new CacheItemPolicy {AbsoluteExpiration = DateTimeOffset.Now.AddHours(1), Priority = CacheItemPriority.NotRemovable});
Assert.AreEqual(2001, expectedFirst.Year);
Assert.AreEqual(2001, expectedSecond.Year);
Assert.AreEqual(1, times);
}
public void GetOrAddWithPolicyAndThenGetObjectReturnsCorrectType()
{
var sut = new CachingService();
Func<ComplexTestObject> fetch = () => new ComplexTestObject();
sut.GetOrAdd(TestKey, fetch, new CacheItemPolicy {AbsoluteExpiration = DateTimeOffset.Now.AddHours(1), Priority = CacheItemPriority.NotRemovable});
var actual = sut.Get<ComplexTestObject>(TestKey);
Assert.IsNotNull(actual);
}
public void GetOrAddAndThenGetWrongtypeObjectReturnsNull()
{
var sut = new CachingService();
Func<ComplexTestObject> fetch = () => new ComplexTestObject();
sut.GetOrAdd(TestKey, fetch);
var actual = sut.Get<Exception>(TestKey);
Assert.IsNull(actual);
}
public void GetFromCacheTwiceAtSameTimeOnlyAddsOnce()
{
var times = 0;
var sut = new CachingService();
var t1 = Task.Factory.StartNew(() =>
{
sut.GetOrAdd(TestKey, () =>
{
Interlocked.Increment(ref times);
return new DateTime(2001, 01, 01);
});
});
var t2 = Task.Factory.StartNew(() =>
{
sut.GetOrAdd(TestKey, () =>
{
Interlocked.Increment(ref times);
return new DateTime(2001, 01, 01);
});
});
Task.WaitAll(t1, t2);
Assert.AreEqual(1, times);
}
public void GetOrAddWithOffsetWillAddAndReturnCached()
{
var sut = new CachingService();
var expectedFirst = sut.GetOrAdd(
TestKey,
() => new DateTime(2001, 01, 01),
DateTimeOffset.Now.AddSeconds(5)
);
var expectedSecond = sut.Get<DateTime>(TestKey);
Assert.AreEqual(2001, expectedFirst.Year);
Assert.AreEqual(2001, expectedSecond.Year);
}
