Defines a callback method for notifying applications when a request
for asynchronous insert operation completes.
Namespace: Alachisoft.NCache.Web.CachingAssembly: Alachisoft.NCache.Web (in Alachisoft.NCache.Web.dll) Version: 4.1.0.0 (4.1.0.0)
Syntax
C# |
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public delegate void AsyncItemUpdatedCallback( string key, Object result ) |
Visual Basic |
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Public Delegate Sub AsyncItemUpdatedCallback ( _ key As String, _ result As Object _ ) |
Visual C++ |
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public delegate void AsyncItemUpdatedCallback( String^ key, Object^ result ) |
Parameters
- key
- Type: System..::..String
The cache key used to reference the item.
- result
- Type: System..::..Object
It indicates the result of the async operation. If the operation completes successfully, the result contains 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.
CopyC#
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) { } }