Using Write-Behind with Asynchronous Operations

Add New Item Asynchronously

Member	Description
AddAsync(string key, CacheItem item, DSWriteOption dsWriteOption, DataSourceItemsAddedCallback onDataSourceItemAdded);	Adds item asynchronously in cache using the default provider and Write-Behind option
void AddAsync(string key, CacheItem item, DSWriteOption dsWriteOption, string providerName, DataSourceItemsAddedCallback onDataSourceItemAdded)	Adds item asynchronously in cache using Custom Provider and Write-Behind option

protected void OnDataSourceItemsAdded(IDictionary iDict)
{
    //Perform appropriate actions upon response
}

private void AsyncAddTest()
{
    try
    {
        string key = "Customer:David:1001";
        CacheItem cacheItem = new CacheItem(new Product());
        cache.AddAsync(key, cacheItem, DSWriteOption.WriteBehind, OnDataSourceItemsAdded);

        //verify that the key is added in Cache and master source
    }
    catch (Exception exp)
    {
        //handle exception
    }
}

Update Existing Item Asynchronously

Member	Description
void InsertAsync(string key, CacheItem item, DSWriteOption dsWriteOption, DataSourceItemsUpdatedCallback onDataSourceItemUpdatedCallback)	Updates existing item asynchronously in cache using the default provider
void InsertAsync(string key, CacheItem item, string providerName, DSWriteOption dsWriteOption, DataSourceItemsUpdatedCallback onDataSourceItemUpdatedCallback)	Updates existing item asynchronously in cache using the specified provider

protected void OnDataSourceItemsUpdated(IDictionary iDict)
{
    //Perform appropriate actions upon response
}

private void AsyncUpdateTest()
{
    Cache mycache = NCache.InitializeCache("myreplicatedcache");
    try
    {
        string key = "Customer:David:1001";
        CacheItem cacheItem = new CacheItem(new Product());
        cacheItem.SubGroup = "Async-WriteThru-Test";

        cache.InsertAsync(key, cacheItem, DSWriteOption.WriteBehind, OnDataSourceItemsUpdated);

        //verify that the key is updated in Cache and master source
    }
    catch (Exception exp)
    {
        //handle exception
    }
}

See Also

Configuring WriteThru Provider

Using Write-Behind with Basic Operations

Using Write-Behind with Bulk Operations

Monitor Write-Through Counters

Configuring Write-Through Provider