Xml Web Services Serialization Custom

Windows Server AppFabric adds Read-Through and Write-Behind Support

The new Read-Through and Write-Behind support in Windows Server AppFabric 1.1 allow developers to improve performance while at the same time reduce the complexity of their applications. This is done by moving the logic for reading from and writing to the database into the caching server itself.

Normally when a get request fails the client is responsible for loading the missing data from slow storage (e.g. a database, file server, or remote service) and populating the cache. This triples the number of round-trips needed for the request and introduces the possibility for a race condition. With Read-Through support turned on AppFabric itself makes the secondary call to slow storage. AppFabric gains this ability via a custom implementation of the abstract class DataCacheStoreProvider .

On the flip side, updating data requires sending changes to both the cache server and the slow storage. With Write-Behind support the client only needs to inform the cache server. The cache server will immediately acknowledge the update and then asynchronously update the slow storage. Again this requires a custom implementation of the DataCacheStoreProvider class.

AppFabric also offers features specifically designed for ASP.NET. The documented capabilities for the ApppFabric based ASP.NET session state provider are:

The “individual items” mode may offer the most significant advantage over previous versions in terms of performance, but it requires significant effort to use correctly. The basic idea is that only keys/value pairs that are actually needed are sent to the web server, thus reducing the penalty for storing large objects in the session. But this cannot be done blindly, lest you end up making far too many small requests. The solution is to group your session data so that related items are loaded at once. For example you may have a single “UserInfo” key instead of separate keys for the username, full name, and permissions. Another key may have a large object that is only needed on a single page or set of pages.

The.net object XML serialization and unserializing

Serialization has many advantages, for example, in machine create an instance, the initialization finished, then can serialization, through network transmits to another machine, then unserializing, get the object instance, later again performing some business logic, get results, then return to the first machine, serial, the first machine get object instance, get the result. Dim myObject As MySerializableClass = New MySerializableClass()' Insert code to set properties and fields of the object.Dim mySerializer As XmlSerializer = New XmlSerializer(GetType(MySerializableClass))' To write to a file, create a StreamWriter object.Dim myWriter As StreamWriter = New StreamWriter("myFileName.xml")mySerializer.Serialize(myWriter, myObject) MySerializableClass myObject = new MySerializableClass();// Insert code to set properties and fields of the object.XmlSerializer mySerializer = new XmlSerializer(typeof(MySerializableClass));// To write to a file, create a StreamWriter object.StreamWriter myWriter = new StreamWriter("myFileName.xml");mySerializer.Serialize(myWriter, myObject); Dim myObject As MySerializableClass' Constructs an instance of the XmlSerializer with the type' of object that is being deserialized.Dim mySerializer As XmlSerializer = New XmlSerializer(GetType(MySerializableClass))' To read the file, creates a FileStream.Dim myFileStream As FileStream = _New FileStream("myFileName.xml", FileMode.Open)' Calls the Deserialize method and casts to the object type.myObject = CType( _mySerializer.Deserialize(myFileStream), MySerializableClass) MySerializableClass myObject;// Constructs an instance of the XmlSerializer with the type// of object that is being deserialized.XmlSerializer mySerializer = new XmlSerializer(typeof(MySerializableClass));// To read the file, creates a FileStream.FileStream myFileStream = new FileStream("myFileName.xml", FileMode.Open);// Calls the Deserialize method and casts to the object type.

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