NCache cache sync dependency provides a way to synchronize two caches, so that an item updated or removed from one cache have the same effect on the synchronized cache.

 

Adding Data with Cache Sync Dependency

 

The following code explains the use of cache synch dependency. An item in clustered cache 'myreplicatedcache' is replicated in local cache 'mycache' with cache sync dependency. Any change in clustered cache will automatically remove dependent item in local cache.

 

Note that for cache sync dependency, item must exist in cache before another item can be added with dependency on it.

 

try

{

Cache cache1 = NCache.InitializeCache("mycache");

Cache cache2 = NCache.InitializeCache("myreplicatedcache");

 

Product product=new Product();

product.ProductID=1001;

product.ProductName="Chai";

string key="Product:"+product.ProductID;

cache1.Insert(key,product);

 

    CacheSyncDependency dependency = new CacheSyncDependency("mycache",key);

    CacheItem cacheItem = new CacheItem(cache1.Get(key));

    cacheItem.SyncDependency = dependency;

    cache2.Insert(key, cacheItem);

 

//Removing/Deleting item from cache1 will expire it from cache2 as well

catch (OperationFailedException e)

{

    // handle exception if any cache operation fails

 

}

 

See Also

Cache Dependencies Overview | Custom Dependency | Synchronizing Cache with Relational Database | Adding Data with File and Key Dependencies | Synchronizing Cache with Custom Data Sources | Add Dependency to the Existing Cached Item | Aggregate Cache Dependency

---

Send comments on this topic.