Portlets in Action

Chapter 13. Reusable logic with portlet filters

This chapter covers

• Types of portlet filters
• The portlet filter lifecycle
• Creating portlet filters
• Configuring portlet filters

In previous chapters you saw examples where the complete request-processing logic was contained within the lifecycle methods of the portlet. For instance, in the Book Catalog portlet, the logic that sets the title of the portlet window, based on the value of the myaction request parameter, is part of the request-processing logic. Similarly, you can have request-logging logic in lifecycle methods that log requests to a log file, which is later analyzed by a log-analyzer tool to generate important statistics. The logic inside a lifecycle method can’t be used by other ...