Flexible
UI 
Use
When you implement flexible UI components, calls to the repository framework can slow down performance. You can speed up such calls with the help of different strategies. You can:
· Reuse information within UI components
· Use mass calls
Reusing Information
Flexible UI components like collection renderers or property renderers often have to retrieve information that is related to resources from the repository framework. However, this information is usually already available and therefore does not have to be requested again. Most of the methods implemented for a UI component require resource-related information as parameters. For example, in the code extract below, the renderProperty method requires a resource object as a parameter. The reference to the resource object can be reused for other purposes.
public class SimplePropertyRenderer implements IModelledPropertyRenderer
public Component
renderProperty(IProperty prop, IMetaName metaname,
IResource r, IProxy proxy, IParameters p)
throws WcmException {
:
}
}
Basic Code
In the coding for UI components, avoid retrieving IResource objects from the repository framework with RepositoryFactorycalls as shown in the following:
IResourceList res = ResourceFactory.getInstance().getResources(rl..);
IRID rid = res.getRID();
:
Optimized Code
Instead of calling the ResourceFactory, use the local reference to the resource object passed as parameter to the renderProperty method.
IRID rid = r.getRID(); // r is the local variable referenced
Using Mass Calls
If you process multiple objects of the repository framework, for example, properties, use mass calls whenever possible.
In the following code, the ResourcePropertyAmalgamation class, which caches calls for properties, is used to access properties. The instance of the class is obtained with IProxy.getAmalgamation(). The coding uses the class to return all properties of the resource, using cached properties whenever possible.
IPropertyNameList nl = new PropertyNameList();
nl.add(PropertyName.createLastModified());
nl.add(PropertyName.createLastModifiedBy());
nl.add(PropertyName.createDisplayName());
IPropertyMap propMap = proxy.getAmalgamation().getProperties(r, nl);
If you have to call the repository framework directly, use the mass-call operation of the ResourceFactory object.
IRidList rl = new RidList();
rl.add(RID.getRID("/documents/test.txt"));
rl.add(RID.getRID("/documents/test2.txt"));
IResourceList
resList = ResourceFactory.getInstance().
getResources(rl,...);