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Model-View-Controller design pattern. Display design patterns. Command design patterns. Model-View-Controller design pattern: The model-view-controller (MVC) design pattern specifies that an application consist of a data model, presentation information, and control information . The model (for example, the data information) contains only the pure application data; it contains no logic describing how to present the data to a user. The view (for example, the presentation information) presents the model's data to the user. The view knows how to access the model's data, but it does not know what this data means or what the user can do to manipulate it. Finally, the controller (for example, the control information) exists between the view and the model. It listens to events triggered by the view (or another external source) and executes the appropriate reaction to these events. In most cases, the reaction is to call a method on the model. Since

   An Access Control Policies authorizes a group of users to perform a set of actions on a set of resources. An access control policy has 4 elements, they are: User. Action. Resource. Relationship. User:   The Users are the people that use the system. For access control purposes, users must be grouped into relevant access groups.  Action: Actions are the activities that users can perform on the resource. Resource: Resources are the entities that are protected. A resource group might include business objects like contract or order , or a set of related commands. Relationship: Relationships are the relationship between the user and the resource. Access control policies may require that a relationship between the user and the resource be satisfied. Each resource class can have a set of relationships associated with it. Each resource can have a set of users that fulfill each relationship. There are 2 types of access control policies , they are: Groupa

This is to allow for application implementation of the type of optimistic locking that Oracle does at the DB level. It allows lowered levels of locking and not surprisingly is discussed in the info center for both Version 6 (introduced) and Version 7

   Refresh copy helper is to retrieve the fields using primary key like select * from where memberId, and commitCopyhelper is to insert or update fields ( The method refreshCopyHelper() writes to the hash table from the database)

WebSphere Commerce V7.0 Feature Pack 4 includes: ·          Smarter stores optimized for mobile devices ·          Facebook integration allowing shoppers to click and share ·          Programming model enhancements Starter stores optimized for mobile devices ·          Smart phone and tablet starter stores provide rich storefronts for several mobile devices and platforms. They can be deployed on mobile devices and accessed using the mobile Web or as native or hybrid applications. See the What’s new overview of smart phone and tablet starter stores for a complete look at this exciting new functionality: o     What’s new: Smart phone and tablet starter stores with location-based services . The What’s new overview contains information for smart phone and tablet starter stores with location-based services, including: o     The benefits of enabling smart phone and tablet starter stores. o     Related features of Feature Pack 4, such as REST services. o     User role-s

Generally controller command is the main command which we used to call from the JSP to process the request, But task command is used to perform some specific task like for inventory check, price check, these are handled through task commands, so task command are command which perform specific task for controller command. DIFFERENCE - By the above statement we can visualize that Controller command is required to be configure in the struts file, but task command is not required to be configured in struts, rest everything is same in both.

cross-sell A merchant suggests other catalog entries based on an already chosen catalog entry. For example, a merchant can suggest a high-resolution color printer when a digital camera is purchased, or a particular type of batteries when a flashlight is purchased. up-sell A merchant suggests a better catalog entry based on the one selected. For example, a merchant can suggest a higher quality television when a low-end model is selected.