(glavGH-3) memcached - Allow User/Pass configuration

Previously a user could not control username/password when working with
memcached data stores, even though Enyim Memcached Client supports the
ability for user/pass configuration. All setting username / password as
part of the specific configuration data that can be provided in a
config file.

Glav.CacheAdapter/Distributed/memcached/memcachedCacheFactory.cs

@@ -17,6 +17,8 @@ public class memcachedCacheFactory : CacheConstructionFactoryBase
         private TimeSpan _connectTimeout = TimeSpan.FromSeconds(5);
         // this is set to text by default due to issues with Binary and Transcoder
         private string _protocol = "Text";
+        private string _userName = "";
+        private string _password = "";
         private TimeSpan _deadNodeTimeout = TimeSpan.FromSeconds(30);
         private static bool _isInitialised;
         private static readonly object _lockRef = new object();
@@ -34,6 +36,8 @@ public memcachedCacheFactory(ILogging logger, CacheConfig config = null)
         public int MaximumPoolSize { get { return _maxPoolSize; } }
         public TimeSpan ConnectTimeout { get { return _connectTimeout; } }
         public string Protocol { get { return _protocol; } }
+        public string UserName { get { return _userName; } }
+        public string Password { get { return _password; } }
         public TimeSpan DeadNodeTimeout { get { return _deadNodeTimeout; } }
 
         public override CacheFactoryComponentResult CreateCacheComponents()
@@ -74,6 +78,15 @@ private ICache CreateCacheEngine()
                         config.Protocol = protocol;
 
                         config.Transcoder = new DataContractTranscoder();
+
+                        if (!string.IsNullOrWhiteSpace(UserName) && !string.IsNullOrWhiteSpace(Password))
+                        {
+                            config.Authentication.Type = typeof(PlainTextAuthenticator);
+                            config.Authentication.Parameters.Add("userName", UserName);
+                            config.Authentication.Parameters.Add("password", Password);
+                            config.Authentication.Parameters.Add("zone", string.Empty);
+                        }
+
                         _client = new MemcachedClient(config);
                         Logger.WriteInfoMessage("memcachedAdapter initialised.");
                         LogManager.AssignFactory(new LogFactoryAdapter(Logger));
@@ -137,6 +150,9 @@ private void ExtractCacheSpecificConfig()
                 _protocol = protocol;
             }
 
+            _userName = CacheConfiguration.GetConfigValueFromProviderSpecificValues(memcachedConstants.CONFIG_UserName);
+            _password = CacheConfiguration.GetConfigValueFromProviderSpecificValues(memcachedConstants.CONFIG_Password);
+
             var connectTimeoutValue = CacheConfiguration.GetConfigValueFromProviderSpecificValues(memcachedConstants.CONFIG_ConnectionTimeout);
             var deadTimeoutValue = CacheConfiguration.GetConfigValueFromProviderSpecificValues(memcachedConstants.CONFIG_DeadNodeTimeout);
 

Glav.CacheAdapter/Distributed/memcached/memcachedConstants.cs

@@ -6,6 +6,8 @@ class memcachedConstants
 		public const string CONFIG_MaximumConnectionPoolSize = "MaxPoolSize";
 		public const string CONFIG_ConnectionTimeout = "ConnectionTimeout";
 	    public const string CONFIG_Protocol = "Protocol";
+	    public const string CONFIG_UserName = "UserName";
+	    public const string CONFIG_Password = "Password";
         public const string CONFIG_DeadNodeTimeout = "DeadNodeTimeout";
     }
 }