Delegate AsyncItemUpdatedCallback

Defines a callback method for notifying applications when a request for asynchronous insert operation completes.

Namespace:

Assembly: Alachisoft.NCache.Web.dll

Syntax

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

Parameters

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

Remarks

Since this handler is invoked every time an item is removed from 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 AsyncItemUpdatedCallback class to notifiy an application when an item is asynchronously updated in the Cache object. You could include this code in a code declaration block in the Web Forms page, or in a page code-behind file.

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

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