Appfabric缓存通知问题 [英] Appfabric cache Notification problem

问题描述

我有通知接收问题，我们有缓存"费率"附加配置 

Hi i have problem with notification receive , we have cache "Rates" attach configuration 

和我的代码：

课程

class Program

    {





        static DataCacheServerEndpoint cache_server = new DataCacheServerEndpoint（" 192.168.1.87"，22233）;

        static DataCacheFactoryConfiguration configuration = new DataCacheFactoryConfiguration（）;

  &NBSP; &NBSP; &NBSP;静态列表< DataCacheServerEndpoint>服务器;

  &NBSP; &NBSP; &NBSP;静态DataCache dtCache;

  &NBSP; &NBSP; &NBSP; static void Main（string [] args）

  &NBSP; &NBSP; &NBSP; {



  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; servers = new List< DataCacheServerEndpoint>（1）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; servers.Add（cache_server）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; configuration.SecurityProperties = new DataCacheSecurity（DataCacheSecurityMode.None，DataCacheProtectionLevel.None）;



$


  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; configuration.Servers = servers;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; configuration.NotificationProperties = new DataCacheNotificationProperties（1000，new TimeSpan（0,0,0,0,5））;



  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; configuration.LocalCacheProperties = new DataCacheLocalCacheProperties（）;



  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; //禁用异常消息，因为此示例在缓存旁边工作

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; DataCacheClientLogManager.ChangeLogLevel（System.Diagnostics.TraceLevel.Info）;



  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; DataCacheFactory CacheFactory = null;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; CacheFactory = new DataCacheFactory（配置）;



$


  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; dtCache = CacheFactory.GetCache（" Rates"）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; DataCacheOperations allCacheOperations;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; allCacheOperations = DataCacheOperations.AddItem |

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; DataCacheOperations.ReplaceItem
|

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; DataCacheOperations.RemoveItem;



  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; DataCacheNotificationDescriptor dtnDesc2 = dtCache.AddItemLevelCallback（" Rates"，allCacheOperations，myCacheLvlDelegate）;



  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Console.WriteLine（"准备接收通知"）; 

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Console.Read（）; 

  &NBSP; &NBSP; &NBSP; }



  &NBSP; &NBSP; &NBSP; public static void myCacheLvlDelegate（string myCacheName，

              string myRegion，

              string myKey，

              DataCacheItemVersion itemVersion，

              DataCacheOperations OperationId，

  ;             DataCacheNotificationDescriptor nd）

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; {

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; //显示一些代表参数

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Console.WriteLine（"触发缓存级别通知！"）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Console.WriteLine（"   Cache：" + myCacheName）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Console.WriteLine（    Region：" + myRegion）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Console.WriteLine（    Key：" + myKey）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Console.WriteLine（    Operation：" + OperationId.ToString（））;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Console.WriteLine（）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; }

  &NBSP; }

    {



        static DataCacheServerEndpoint cache_server = new DataCacheServerEndpoint("192.168.1.87", 22233);
        static DataCacheFactoryConfiguration configuration = new DataCacheFactoryConfiguration();
        static List<DataCacheServerEndpoint> servers;
        static DataCache dtCache;
        static void Main(string[] args)
        {

            servers = new List<DataCacheServerEndpoint>(1);
            servers.Add(cache_server);
            configuration.SecurityProperties = new DataCacheSecurity(DataCacheSecurityMode.None, DataCacheProtectionLevel.None);



            configuration.Servers = servers;
            configuration.NotificationProperties = new DataCacheNotificationProperties(1000, new TimeSpan(0, 0, 0, 0, 5));

            configuration.LocalCacheProperties = new DataCacheLocalCacheProperties();

            //Disable exception messages since this sample works on a cache aside
            DataCacheClientLogManager.ChangeLogLevel(System.Diagnostics.TraceLevel.Info);

            DataCacheFactory CacheFactory = null;
            CacheFactory = new DataCacheFactory(configuration);



            dtCache = CacheFactory.GetCache("Rates");
            DataCacheOperations allCacheOperations;
            allCacheOperations = DataCacheOperations.AddItem |
                                                              DataCacheOperations.ReplaceItem |
                                                              DataCacheOperations.RemoveItem;

            DataCacheNotificationDescriptor dtnDesc2 = dtCache.AddItemLevelCallback("Rates", allCacheOperations, myCacheLvlDelegate);

            Console.WriteLine("Ready for receive notifications"); 
            Console.Read(); 
        }

        public static void myCacheLvlDelegate(string myCacheName,
                          string myRegion,
                          string myKey,
                          DataCacheItemVersion itemVersion,
                          DataCacheOperations OperationId,
                          DataCacheNotificationDescriptor nd)
                                {
                                    //display some of the delegate parameters
                                    Console.WriteLine("A cache-level notification was triggered!");
                                    Console.WriteLine("    Cache: " + myCacheName);
                                    Console.WriteLine("    Region: " + myRegion);
                                    Console.WriteLine("    Key: " + myKey);
                                    Console.WriteLine("    Operation: " + OperationId.ToString());
                                    Console.WriteLine();
                                }
    }

我可以在推模式下更新缓存，但我无法收到通知，为什么？

i can update cache in push mode but i can't receive notification , why ?

问候

Alex 

Alex 

推荐答案

Hello Alex，

Hello Alex,

代码中有一个小错误。

DataCacheNotificationDescriptor dtnDesc2 = dtCache.AddItemLevelCallback（" Rates"，allCacheOperations，myCacheLvlDelegate）;

当你想要ItemLevel回调时，AddItemLevelCallback的第一个参数应该是"key"。您想要通知的（项目）[您在何处指定" cacheName"]。文档指针 -
http://msdn.microsoft.com/en-us /library/ff424507(v=ws.10 ）

When you want ItemLevel Call back, the first parameter of AddItemLevelCallback is supposed to be the "key" (item) on which you want notifications [Where as you are specifying "cacheName"]. Documentation pointer - http://msdn.microsoft.com/en-us/library/ff424507(v=ws.10)

所以，在你的情况下，如果你想回调缓存上的各种操作，你需要使用

AddCacheLevelCallback   - 如果您使用此方法，您将获得针对不同操作的通知回调，因为您在方法参数中指定。

So, in your case if you want call back for various operations on the cache you need to use AddCacheLevelCallback - If you use this method you would get notification call backs for different operations as you specify in the method params.

希望差异很明显。

谢谢

Ranganath G

Ranganath G

这篇关于Appfabric缓存通知问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！