Serializing objects to XML using the API

The Xperience API provides a way to serialize many types of objects from the database into XML data. You can use the serialized data to synchronize objects between multiple development instances, in combination with a custom source control system or continuous integration solution. The system ensures that the XML data of matching objects is always identical and consistent (including element and attribute order), even when serialized on different instances of Xperience.

Serialization is supported for the object types listed on the Object types supported by continuous integration page.

Getting the serialized XML data for objects

To get the serialized XML data of Xperience objects:

1. Prepare a BaseInfo (UserInfo, PageTemplateInfo etc.) instance representing the object.
2. Call the Serialize extension method of the BaseInfo object (provided within the CMS.DataEngine.Serialization library).

The Serialize method returns an XmlElement.

using System.Xml;
using CMS.DataEngine.Serialization;
using CMS.Membership;

...

// Gets a user object
UserInfo userObject = UserInfo.Provider.Get("admin");

// Creates an XmlElement containing the serialized data of the object
XmlElement objectElement = userObject .Serialize();

// Gets the serialized object data as an XmlDocument
XmlDocument xmlDoc = objectElement.OwnerDocument;

Deserializing XML data into objects

The API provides a way to deserialize XML data back into Xperience objects:

1. Read the XML data as an XmlDocument from the file system (or another source).
2. Get the XmlElement representing the given object from the XmlDocument (typically the root element).
3. Call the Deserialize extension method of the XmlElement (provided within the CMS.DataEngine.Serialization library).

The Deserialize method returns a DeserializationResult object, which you can convert to a specific Info object type (UserInfo, PageTemplateInfo, etc.) or a general BaseInfo. You can then work with the Info object in any way. For example, use the corresponding IInfoProvider service or InfoProvider class to save the deserialized object into the application’s database.

using System.Xml;
using CMS.DataEngine;
using CMS.DataEngine.Serialization;
using CMS.Membership;

...

// Prepare an XmlDocument containing the serialized data of a user
XmlDocument xmlDoc = ... ;

// Gets the root XmlElement of the XmlDocument
XmlElement xmlElement = xmlDoc.DocumentElement;

// Deserializes the XML data into a UserInfo object
DeserializationResult result = xmlElement.Deserialize();
UserInfo user = (UserInfo)result;

// Saves the deserialized user into the database
UserInfo.Provider.Set(user);

Serializing all objects to the file system

You can call the API of the Xperience continuous integration solution to serialize all objects of the supported types directly to the file system.

Call the StoreAll static method of the CMS.ContinuousIntegration.FileSystemRepositoryManager class. The method returns a RepositoryActionResult object, which you can use to verify the success of the operation and process any errors that occurred.

using CMS.ContinuousIntegration;

...

// Serializes all supported objects to the file system
RepositoryActionResult result = FileSystemRepositoryManager.StoreAll((logItem) =>
{
    // Optionally create a progress log by processing the 'logItem.Message' strings 
});

// Checks whether the serialization process was successful
if (!result.Success)
{
    foreach (string error in result.Errors)
    {
        // Display or log the errors
    }
}

The StoreAll method creates XML files containing the serialized data of objects in the administration project’s CMS\App_Data\CIRepository folder (or another location set by the CMSCIRepositoryPath web.config key). You need to ensure that the folder is included in your source control system.

For details about the file system structure, see Continuous integration repository structure.

Restoring objects from the file system

When developing websites in a team, you may often need to load the serialized XML data of objects from a source control system or another developer.

You can restore the data from the XML files in the project’s CIRepository folder (or another location set by the CMSCIRepositoryPath web.config key) using the ContinuousIntegration.exe command line utility available in the Xperience administration project’s CMS\bin folder. The utility deserializes the objects stored in the project’s CIRepository folder and creates, overwrites or removes corresponding data in the given project’s database. See Restoring continuous integration files to the database for details.

If you wish to implement a custom solution for restoring objects to the database, use the Xperience API. 

Call the RestoreAll static method of the CMS.ContinuousIntegration.FileSystemRepositoryManager class. The method returns a RepositoryActionResult object, which you can use to verify the success of the operation and process any errors that occurred.

using CMS.Base;
using CMS.ContinuousIntegration;

...

RepositoryActionResult result;

// Disables automatic processing of new smart search indexing tasks during the restore operation to prevent potential conflicts
// Indexing tasks are still created, but processed after the restore is finished
using (new CMSActionContext { EnableSmartSearchIndexer = false })
{
    // Deserializes all supported objects from the file system repository and saves them to the database
    // Deletes objects from the database if their representation does not exist in the file system repository
    result = FileSystemRepositoryManager.RestoreAll((logItem) => 
    { 
        // Optionally create a progress log by processing the 'logItem.Message' strings 
    });
}

// Checks whether the restoring process was successful        
if (!result.Success)
{
    foreach (string error in result.Errors)
    {
        // Display or log the errors
    }
}