Writing you own WCS controller command

Steps involved in writing you own controller command are

1. Writing controller command interface 

• As this is  your first command it is best if you stop your server
• Open WCS developer and  go to Java EE view
• In the Enterprise Explorer view open WebSphereCommerceServerExtensionsLogic and right click on src folder and create a new interface (new > Interface)
• In the inftrace creation wizad fill in below details and click finsh:
• Name:  HelloWcsCmd 
• Package: com.developernotes.wcs.commands
• Extended interface:   com.ibm.commerce.command.ControllerCommand  (Click on add button and search for ControllerCommand)
• In the interface class HelloWcsCmd.java enter below code:

// default implement class
  static final String defaultCommandClassName = 
   "com.developernotes.wcs.commands.HelloWcsCmdImpl";

2. Writing controller command implementation class.

• In the Enterprise Explorer view open WebSphereCommerceServerExtensionsLogic and right click on src folder and create a new java class (new > Class)
• In the class creation wizad fill in below details and click finish:
• Name: HelloWcsCmdImpl
• Package: com.developernotes.wcs.commands
• SuperClass:  com.ibm.commerce.command.ControllerCommandImpl (Click browse and search for  ControllerCommandImpl)
• Interface:  com.developernotes.wcs.commands.HelloWcsCmd (click add search for you interface and add)
• In the implementation  class HelloWcsCmdImpl.java enter below code: 

@Override
public void performExecute() throws ECException {
 super.performExecute();
 System.out.println("Hello WCS");
}

3. Adding Struts entry

• Open struts-config-ext.xml in Stores web-project in Struts Configuration File Editor
• Go to Action Mappings tab in Struts Configuration File Editor 
• Under  Actions Mappings section, click Add button. Delete the default path value(default is /action1) and enter /hellowcs for the path value. 
• Under Action Mapping attributes, enter com.ibm.commerce.struts.BaseAction in the Type attribute and  in Parameter attribute enter com.test.wcs.commands.HelloWcsCmd . The parameter attribute contains  interface name of the logic/java class that we need to be executed.
• Save struts-config-ext.xml  
• Restart your server so that the status changes take effect [Apply Struts changes with out server restart]
4. Adding controller command in the command registry (optional)
• You don't need to do this this to make your command work. Command registry is used when you need to specify which implementation the interface class/command should call for a particular store. 
5. Setting up  access control for a controller command
• Create a file HelloWcsCmdACPolicy.xml enter below xml in this file.
• Place the file in  xml\policies\xml directory which you can find with in you WebSphere Commerce Developer installation directory.  
• Run acplod  [ Acpload command ]

Start you server and go to http://localhost/webapp/wcs/stores/servlet/hellowcs . In the console if  you can see the message "Hello WCS" your first command ran successfully.

Reference : http://publib.boulder.ibm.com/infocenter/wchelp/v7r0m0/index.jsp