Droplet ,ATG Servlet Bean And Custom Droplet

What is custom droplet:

A custom droplet s nothing but a new customized component i.e. a java class implementing business logic and a property file which registers it to nucleus.

It’s generally made by extending existing/given ATG OOTB component.

As part of custom droplet, new java (class) file and a property file need to be created.

Why it is required:

When existing functionality of ATG given OOTB component is not sufficient or

-   Customization is required based on requirement or

-   More specific implementation of given functionality need to be provided (like creating custom droplet for tax calculation which will override ATG given tax calculations).

A droplet is basically ATG's custom servlet which has some atg-specific customization. Just like we use HttpServlet in J2EE, we have have DynamoServlet class which implements javax.servlet.Servlet interface in ATG.

 Step 1: Create a java class extending atg.servlet.DynamoServlet and overriding the service (DynamoHttpServletRequest pRequest, DynamoHttpServletResponce pResponse) throw ServletException, IOException method.

Step 2:Create ATG Component for the class, The scope of the component should be global.

          $class = com.test.droplet.ParamaterDroplet

          $scope=global

          $description=print the value under droplet

Step 3:Declare the droplet in the JSP

Step 4:I Three way we can pass input Parameter into JSP Side:

          - Using value tag

          - Using param tag

          - Using bean tag

           Input Paramater Java Side:

           -   String current=pRequest.getParamater(PARAM_CURRENT_PAGE);