Controller Command (vs) Task Command

WCS Commands

Any business logic that should be executed on server is written in the form of commands in WCS.

Basic command types:

1. Controller Command

2. Task Command

Controller Command	Task Command
Holds the complete business logic for an action.	Holds a part of logic involved in an action i.e; to execute a specific task.
Can be executed as an independent request.	Cannot be executed as an independent request but should be invoked from another command.
Needs resource level access control policies to be defined and executed.	Does not need access control as this is executed from a controller command which already has the policies defined.
Can be defined specific to a store.	Can be defined specific to a store.
Can be cached	Can be cached
Example: UserRegistrationAddCmd is used to Register a user.	Example: UpdateCredentialsCmd is invoked from UserRegistrationAddCmd to encrypt and update the credentials of the user.