Controller (Apache Struts API Documentation)
Keywords: org.apache.struts.tiles.Controller,Controller interface

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## org.apache.struts.tiles
Interface Controller

All Known Implementing Classes:
  ActionController, ControllerSupport, UrlController

public interface Controller

A controller is a piece of code called before rendering a jsp page. A controller can be associated to a tile. See or for association syntax.

Method Summary
`void` | `perform(ComponentContext tileContext, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.ServletContext servletContext)` Method associated to a tile and called immediately before the tile is included.

Method Detail

### perform

    public void perform(ComponentContext tileContext,
                        javax.servlet.http.HttpServletRequest request,
                        javax.servlet.http.HttpServletResponse response,
                        javax.servlet.ServletContext servletContext)
                 throws javax.servlet.ServletException,
                        java.io.IOException

  Method associated to a tile and called immediately before the tile is included.

  Parameters:
    `tileContext` - Current tile context.
    `request` - Current request
    `response` - Current response
    `servletContext` - Current servlet context
    `javax.servlet.ServletException`
    `java.io.IOException`

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