VIEApps.Enyim.Caching

The memcached client library on .NET Standard 2.x/.NET Core 2.x+:

• 100% compatible with EnyimMemcached 2.x
• Fully async (EnyimMemcached still blocks threads while reading from sockets/response)
• Multiple nodes supported with Ketama for better distribution
• Object serialization by various transcoders: Binary, Protocol Buffers, Json.NET Bson, MessagePack
• Ready with .NET Core 2.x+/.NET Framework 4.6.1+ with more useful methods (Set, Add, Replace, Refresh, Exists)

NuGet

Information

• Migrated from the fork EnyimMemcachedCore (.NET Core 2.0)
• Reference from the original EnyimMemcached (.NET Framework 3.5)

Usage of ASP.NET Core 2.x+ apps

• Add services.AddMemcached(...) and app.UseMemcached() in Startup.cs
• Add IMemcachedClient or IDistributedCache into constructor (using dependency injection)

Configure (by the appsettings.json file) without authentication

{
	"Memcached": {
		"Servers": [
		{
			"Address": "192.168.0.2",
			"Port": 11211
		},
		{
			"Address": "192.168.0.3",
			"Port": 11211
		}],
		"SocketPool": {
			"MinPoolSize": 10,
			"MaxPoolSize": 100,
			"DeadTimeout": "00:01:00",
			"ConnectionTimeout": "00:00:05",
			"ReceiveTimeout": "00:00:01"
		}
	}
}

Configure (by the appsettings.json file) with authentication

{
	"Memcached": {
		"Servers": [
		{
			"Address": "192.168.0.2",
			"Port": 11211
		},
		{
			"Address": "192.168.0.3",
			"Port": 11211
		}],
		"SocketPool": {
			"MinPoolSize": 10,
			"MaxPoolSize": 100,
			"DeadTimeout": "00:01:00",
			"ConnectionTimeout": "00:00:05",
			"ReceiveTimeout": "00:00:01"
		},
		"Authentication": {
			"Type": "Enyim.Caching.Memcached.PlainTextAuthenticator, Enyim.Caching",
			"Parameters": {
				"zone": "",
				"userName": "username",
				"password": "password"
			}
		}
	}
}

Startup.cs

public class Startup
{
	public void ConfigureServices(IServiceCollection services)
	{
		// ....
		services.AddMemcached(options => Configuration.GetSection("Memcached").Bind(options));
	}
	
	public void Configure(IApplicationBuilder app, IHostingEnvironment env)
	{ 
		// ....
		app.UseMemcached();
	}
}

Use IMemcachedClient interface

public class TabNavService
{
	ITabNavRepository _tabNavRepository;
	IMemcachedClient _cache;

	public TabNavService(ITabNavRepository tabNavRepository, IMemcachedClient cache)
	{
		_tabNavRepository = tabNavRepository;
		_cache = cache;
	}

	public async Task<IEnumerable<TabNav>> GetAllAsync()
	{
		var cacheKey = "aboutus_tabnavs_all";
		var result = await _cache.GetAsync<IEnumerable<TabNav>>(cacheKey);
		if (result == null)
		{
			var tabNavs = await _tabNavRepository.GetAll();
			await _cache.SetAsync(cacheKey, tabNavs, TimeSpan.FromMinutes(30));
			return tabNavs;
		}
		else
			return result;
	}
}

Use IDistributedCache interface

public class CreativeService
{
	ICreativeRepository _creativeRepository;
	IDistributedCache _cache;

	public CreativeService(ICreativeRepository creativeRepository, IDistributedCache cache)
	{
		_creativeRepository = creativeRepository;
		_cache = cache;
	}

	public async Task<IList<CreativeDTO>> GetCreativesAsync(string unitName)
	{
		var cacheKey = $"creatives_{unitName}";
		IList<CreativeDTO> creatives = null;

		var creativesBytes = await _cache.GetAsync(cacheKey);
		var creativesJson = creativesBytes != null ? System.Text.Encoding.UTF8.GetString(creativesBytes) : null;
		if (creativesJson == null)
		{
			creatives = await _creativeRepository.GetCreatives(unitName).ProjectTo<CreativeDTO>().ToListAsync();
			var json = creatives != null && creatives.Count() > 0 ? JsonConvert.SerializeObject(creatives) : string.Empty;
			creativesBytes = System.Text.Encoding.UTF8.GetBytes(json);
			await _cache.SetAsync(cacheKey, creativesBytes, new DistributedCacheEntryOptions().SetSlidingExpiration(TimeSpan.FromMinutes(30)));
		}
		else
			creatives = JsonConvert.DeserializeObject<List<CreativeDTO>>(creativesJson);

		return creatives;
	}
}

Usage of .NET Core 2.x+/.NET Framework 4.6.1+ standalone apps

Configure (by the app.config/web.config) without authentication

<?xml version="1.0" encoding="utf-8"?>
<configuration>
	<configSections>
		<section name="memcached" type="Enyim.Caching.Configuration.MemcachedClientConfigurationSectionHandler, Enyim.Caching" />
	</configSections>
	<memcached>
		<servers>
			<add address="192.168.0.2" port="11211" />
			<add address="192.168.0.3" port="11211" />
		</servers>
		<socketPool minPoolSize="10" maxPoolSize="100" deadTimeout="00:01:00" connectionTimeout="00:00:05" receiveTimeout="00:00:01" />
	</memcached>
</configuration>

Configure (by the app.config/web.config) with authentication

<?xml version="1.0" encoding="utf-8"?>
<configuration>
	<configSections>
		<section name="memcached" type="Enyim.Caching.Configuration.MemcachedClientConfigurationSectionHandler, Enyim.Caching" />
	</configSections>
	<memcached>
		<servers>
			<add address="192.168.0.2" port="11211" />
			<add address="192.168.0.3" port="11211" />
		</servers>
		<socketPool minPoolSize="10" maxPoolSize="100" deadTimeout="00:01:00" connectionTimeout="00:00:05" receiveTimeout="00:00:01" />
		<authentication type="Enyim.Caching.Memcached.PlainTextAuthenticator, Enyim.Caching" zone="" userName="username" password="password" />
	</memcached>
</configuration>

Example

public class CreativeService
{
	MemcachedClient _cache;

	public CreativeService()
	{
		_cache = new MemcachedClient(ConfigurationManager.GetSection("memcached") as MemcachedClientConfigurationSectionHandler);
	}

	public async Task<IList<CreativeDTO>> GetCreativesAsync(string unitName)
	{
		return await _cache.GetAsync<IList<CreativeDTO>>($"creatives_{unitName}");
	}
}

Other transcoders (Protocol Buffers, Json.NET Bson, MessagePack)

See VIEApps.Enyim.Caching.Transcoders

Need a library for working with other distributed cache (Redis) in the same time?

See VIEApps.Components.Caching