ebergstedt / SimpleMemoryCache

Helper library for .NET MemoryCache with generics, easy initialization and deferred methods if key data is not found.

SimpleMemoryCache

Helper library for .NET MemoryCache with generics, easy initialization and deferred methods if key data is not found.

You initialize the cache by instancing ISimpleMemoryCache. A SimpleMemoryCache implementation is provided with the following constructor:

public SimpleMemoryCache(CacheItemPolicy policy = null)

CacheItemPolicy will default to a 5 minute absolute expiration caching time.

Notes

When using a MemoryCache, keep in mind that you are using your RAM with raw data. Caching big objects will take space, so be careful with using it frivolously.

Nuget

PM> Install-Package Ebergstedt.SimpleMemoryCache

Method list

T Get<T>(string key);

T GetOrAdd<T>(string key, T dataToAddToCacheIfCacheResultNotFound);

T GetOrAdd<T>(string key, Func<T> funcResultToAddIfCacheNotFound = null);

void Add<T>(string key, T data);

void Add<T>(string key, Func<T> dataFunc);

void Remove(string key);

void Clear();

Sample usage

[Test]
public void Given_no_cache_Then_add_object_cache_by_Get_Then_get_result()
{
	string key = "Given_no_cache_Then_add_object_cache_by_Get_Then_get_result";

	string data = "data";

	var result = _simpleMemoryCache.GetOrAdd(
	    key, 
	    data
	);

	Assert.True(data == result);
}

[Test]
public void Given_no_cache_Then_add_method_cache_by_Get_Then_get_result()
{
	string key = "Given_no_cache_Then_add_method_cache_by_Get_Then_get_result";

	Func<string> getData = () => "data";

	string data = getData();

	var result = _simpleMemoryCache.GetOrAdd(
  	    key, 
	    getData
	);

	Assert.True(data == result);
}

[Test]
public void Given_no_cache_Then_add_object_cache_by_Add_Then_get_result()
{
	string key = "Given_no_cache_Then_add_object_cache_by_Add_Then_get_result";

	string data = "data";

	_simpleMemoryCache.Add(
	    key, 
	    data
	);

	var result = _simpleMemoryCache.Get<string>(key);

	Assert.True(data == result);
}

[Test]
public void Given_no_cache_Then_add_cache_Then_clear_it_Then_no_cache_exists()
{
	string key = "Given_no_cache_Then_add_cache_Then_clear_it_Then_no_cache_exists";

	string data = "data";

	_simpleMemoryCache.Add(
	    key, 
	    data
	);

	_simpleMemoryCache.Clear();

	var result = _simpleMemoryCache.Get<string>(key);

	Assert.True(string.IsNullOrEmpty(result));
}