Delegate AsyncItemAddedCallback

Defines a callback method for notifying applications after a request for asynchronous add operation completes.

Namespace:

Assembly: Alachisoft.NCache.Web.dll

Syntax

public delegate void AsyncItemAddedCallback(string key, object result);

Parameters

Type	Name	Description
System.String	key	The cache key used to reference the item.
System.Object	result	The result of the Async Operation. If the operation completes successfully, it contatins Alachisoft.NCache.Caching.AsyncOpResult.Success otherwise it contains an OperationFailedException indicating the cause of operation failure.

Remarks

Since this handler is invoked every time an item is added to the Cache, doing a lot of processing inside the handler might have an impact on the performance of the cache and cluster. It is therefore advisable to do minimal processing inside the handler.

Examples

The following example demonstrates how to use the AsyncItemAddedCallback class to notifiy an application when a request for asynchronous add operation completes. Client applications recieve the notification if the operation is successful or not. You could include this code in a code declaration block in the Web Forms page, or in a page code-behind file.

public void OnAsyncItemAdded(string key, object result)
{
    // ...
}

protected void Application_Start(object sender, EventArgs e)
{
    try
    {
        NCache.InitializeCache("myCache");
        CacheItem item = new CacheItem("value");
        item.AsyncItemAddCallback = new AsyncItemAddCallback(OnAsyncItemAdded);
        NCache.Cache.AddAsync("key", item);
    }
    catch(Exception e)
    {
    }
}