Sample Implementation of ICacheLoader on Single Node

Important

Make sure to deploy the Cache Loader after implementation using NCache Manager as explained in Administrators’ Guide.

The following implementation adds 500 items of the Customer class as a bulk into the cache and then adds the remaining 500 (with key dependency) sequentially,

To utilize the following APIs, include the following namespace in your application:

Alachisoft.NCache.Runtime.CacheLoader;

Alachisoft.NCache.Runtime.Caching;

public class Loader : ICacheLoader
{    
    private SqlConnection connection;
    private int _dependencyCount = 500; //first 500 items to be added in bulk
    private int _totalCount=1000;
    private int _index = 0;

    //initializing data source settings
    void Init(IDictionary parameters,string cacheId)
    {
        string connString = parameters["connectionString"].ToString();
        connection = new SqlConnection(connString);
        connection.Open();
    }

    //load data from source into cache
    LoaderResult LoadNext(object index)
    {
        LoaderResult result = new LoaderResult();

        int nextIndex = 0;
        if (index != null)
            nextIndex = (int)index;

        for (; nextIndex < _totalCount; nextIndex++)
        {
            Customer customer = new Customer(nextIndex, "name:" + nextIndex.ToString());
            ProviderCacheItem cacheItem = new ProviderCacheItem(customer);
            if (nextIndex < DependencyCount)
            {
                result.HasKeyDependency = false; //add in bulk
            }
            else if (nextIndex < DependencyCount * 2 && nextIndex > DependencyCount)
            {
                result.HasKeyDependency = true; //add sequentially
                cacheItem.Dependency = new KeyDependency("Customer: 0");
            }
            result.Data.Add("Customer: " + nextIndex, cacheItem);
        }
        result.HasMoreData = true;
        result.UserContext = nextIndex;

        return result;
    }
    void Dispose()
    {
        //optional implementation
    }
}

Sample Implementation of ICacheLoader on Single Node

Important

See Also