Enyim Memcached Client

This is a memcached client library for .NET migrated from EnyimMemcached.

Configure

The appsettings.json Without Authentication

{
  "enyimMemcached": {
    "Servers": [
      {
        "Address": "memcached",
        "Port": 11211
      }
    ],
    "Transcoder": "MessagePackTranscoder"
  }
}

The appsettings.json With Authentication

{
  "enyimMemcached": {
    "Servers": [
      {
        "Address": "memcached",
        "Port": 11211
      }
    ],
    "Authentication": {
      "Type": "Enyim.Caching.Memcached.PlainTextAuthenticator",
      "Parameters": {
        "zone": "",
        "userName": "username",
        "password": "password"
      }
    }
  }
}

Startup.cs

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddEnyimMemcached();
        // services.AddEnyimMemcached("enyimMemcached");
        // services.AddEnyimMemcached(Configuration);
        // services.AddEnyimMemcached(Configuration, "enyimMemcached");
        // services.AddEnyimMemcached(Configuration.GetSection("enyimMemcached"));
        // services.AddEnyimMemcached(options => options.AddServer("memcached", 11211));
    }
    
    public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    { 
        app.UseEnyimMemcached();
    }
}

Example usage

Use IMemcachedClient interface

public class HomeController : Controller
{
    private readonly IMemcachedClient _memcachedClient;
    private readonly IBlogPostService _blogPostService;

    public HomeController(IMemcachedClient memcachedClient, IBlogPostService blogPostService)
    {
        _memcachedClient = memcachedClient;
        _blogPostService = blogPostService;
    }

    public async Task<IActionResult> Index()
    {
        var cacheKey = "blogposts-recent";
        var cacheSeconds = 600;

        var posts = await _memcachedClient.GetValueOrCreateAsync(
            cacheKey,
            cacheSeconds,
            async () => await _blogPostService.GetRecent(10));

        return Ok(posts);
    }
}

Use IDistributedCache interface

public class CreativeService
{
    private ICreativeRepository _creativeRepository;
    private IDistributedCache _cache;

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

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

        var creativesJson = await _cache.GetStringAsync(cacheKey);
        if (creativesJson == null)
        {
            creatives = await _creativeRepository.GetCreatives(unitName)
                    .ProjectTo<CreativeDTO>().ToListAsync();

            var json = string.Empty;
            if (creatives != null && creatives.Count() > 0)
            {
                json = JsonConvert.SerializeObject(creatives);
            }
            await _cache.SetStringAsync(
                cacheKey, 
                json, 
                new DistributedCacheEntryOptions().SetSlidingExpiration(TimeSpan.FromMinutes(5)));
        }
        else
        {
            creatives = JsonConvert.DeserializeObject<List<CreativeDTO>>(creativesJson);
        }

        return creatives;
    }
}

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