#31: Created Cahching mechanism for one of the Users endpoint.

KarthikElumalai · May 29, 2019 · a5718f7 · a5718f7
1 parent 6c97be8
commit a5718f7
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Showing 3 changed files with 30 additions and 4 deletions.
diff --git a/EToken.API/Controllers/UsersController.cs b/EToken.API/Controllers/UsersController.cs
@@ -18,6 +18,7 @@
 using EToken.Core.Model;
 using Microsoft.AspNetCore.Cors;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Caching.Memory;
 
 namespace EToken.API.Controllers
 {
@@ -29,17 +30,21 @@ public class UsersController : ControllerBase
         private IMapper _mapper;
         private readonly AppSettings _appSettings;
         private readonly ILogger<UsersController> _logger;
-
+        private readonly IMemoryCache _cache;
+        private string _userListKey="UsersList";
+        private string _userKey = "User";
         public UsersController(
             IUserService userService
             ,IMapper mapper
             ,IOptions<AppSettings> appSetting
-            ,ILogger<UsersController> logger)
+            ,ILogger<UsersController> logger
+            ,IMemoryCache cache)
         {
             _userService = userService;
             _mapper = mapper;
             _appSettings = appSetting.Value;
             _logger = logger;
+            _cache = cache;
         }
         /// <summary>
         /// Authenticate a user Resource
@@ -123,8 +128,23 @@ public async Task<IActionResult> Register([FromBody]UserResource userResource)
         [HttpGet]
         public async Task<IActionResult> GetAll()
         {
-            var users = await _userService.GetAllAsync();
-            var userResources = _mapper.Map<IList<UserResource>>(users);
+            IEnumerable<User> users = new List<User>();
+            if(!_cache.TryGetValue(_userListKey,out users))
+            {
+                if(users == null)
+                {
+                    users= await _userService.GetAllAsync();
+                }
+                _cache.Set(_userListKey, users,
+                    new MemoryCacheEntryOptions()
+                    .SetSlidingExpiration(TimeSpan.FromMinutes(5))
+                    .SetAbsoluteExpiration(TimeSpan.FromHours(1)));
+                _logger.LogInformation($"{_userListKey} generated and set in cache.");
+            }
+            {
+                _logger.LogInformation($"{_userListKey} was available and pulled from cache.");
+            }
+            var userResources = _mapper.Map<IList<UserResource>>(users); 
             return Ok(userResources);
         }
         /// <summary>

diff --git a/EToken.API/EToken.API.csproj b/EToken.API/EToken.API.csproj
@@ -23,6 +23,7 @@
     <PackageReference Include ="Serilog.AspNetCore" Version="2.1.1"/>
     <PackageReference Include ="Serilog.Settings.Configuration" Version="3.0.1"/>
     <PackageReference Include ="Serilog.Sinks.RollingFile" Version="3.3.0"/>
+    <PackageReference Include="Microsoft.AspNetCore.ResponseCaching" Version=""/>
   </ItemGroup>
 
   <ItemGroup>

diff --git a/EToken.API/Startup.cs b/EToken.API/Startup.cs
@@ -43,6 +43,10 @@ public Startup(IConfiguration configuration)
         public void ConfigureServices(IServiceCollection services)
         {
             services.AddCors();
+            // cache in memory
+            services.AddMemoryCache();
+            // caching response for middlewares
+            services.AddResponseCaching();
             services.AddDbContext<ETokenDBContext>(x => x.UseInMemoryDatabase("TestDb"));
             services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
             var config = new AutoMapper.MapperConfiguration(cfg =>
@@ -132,6 +136,7 @@ public void Configure(IApplicationBuilder app, IHostingEnvironment env,ILoggerFa
             loggerFactory.AddSerilog();
             app.UseCors(x=>x.AllowAnyHeader().AllowAnyMethod().AllowAnyOrigin());
             app.UseAuthentication();
+            app.UseResponseCaching();
             app.UseHttpsRedirection();
             app.UseMvc();
             app.UseSwagger();