Using Absolute Expiration

To utilize the APIs, include the following namespace in your application: Alachisoft.NCache.Web.Caching.

Adding New Item with Absolute Expiration

In the following example, the Add Operation is used to specify an absolute expiration time period for a cache item.

try
{
    //adding absolute expiration of 5 min through Add API.
    cache.Add(key, product, null, System.DateTime.Now.AddMinutes(5), Cache.NoSlidingExpiration, CacheItemPriority.Default);

    // adding Default Absolute expiration with configured value
    cache.Add(key, product, null, Cache.DefaultAbsolute, Cache.NoSlidingExpiration, CacheItemPriority.Default);

    // adding AbsoluteLonger expiration with configured value
    cache.Add(key, product, null, Cache.DefaultAbsoluteLonger, Cache.NoSlidingExpiration, CacheItemPriority.Default);
}
catch (Exception ex){
    // handle exception
}

Updating Data with Absolute Expiration

In the following example, the Insert Operation is used to add/update the absolute expiration time period for an item added to the cache.

try
{
    // updating absolute expiration of 5 min through Add API.
    cache.Insert(key, product, null, System.DateTime.Now.AddMinutes(5), Cache.NoSlidingExpiration, CacheItemPriority.Default);

    //updating Default Absolute expiration with configured value
    cache.Insert(key, product, null, Cache.DefaultAbsolute, Cache.NoSlidingExpiration, CacheItemPriority.Default);

    //updating AbsoluteLonger expiration with configured value
    cache.Insert(key, product, null, Cache.DefaultAbsoluteLonger, Cache.NoSlidingExpiration, CacheItemPriority.Default);
}
catch (Exception ex){
     // handle exception
}

Setting Absolute Expiration with CacheItem

In the following example Absolute Expiration time period is set by assigning it to a property of a CacheItem object.

 // Setting Absolute expiration of 5 minutes.
cacheItem.AbsoluteExpiration = System.DateTime.Now.AddMinutes(5);

try{
    cache.Add(key, cacheItem, DSWriteOption.None, null);
}
catch (Exception ex){
    // handle exception
}