org.mentawai.core
Class Controller

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          org.mentawai.core.Controller

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

Direct Known Subclasses:

PrettyURLController

public class Controller
extends javax.servlet.http.HttpServlet

The Mentawai central controller. Mentawai actions are intercepted and executed by this controller. The controller is also responsable for creating and starting the ApplicationManager.

Author:

Sergio Oliveira, Rubem Azenha (rubem.azenha@gmail.com)

See Also:

Serialized Form

Field Summary

protected static ApplicationContext

appContext

Constructor Summary

Controller()

Method Summary

void	destroy() Destroy all filters defined in the ApplicationManager, call the destroy() method of ApplicationManager, then call super.destroy() to destroy this servlet (the Controller).
protected java.lang.String	getActionName(javax.servlet.http.HttpServletRequest req) From the http request, get the action name.
static javax.servlet.ServletContext	getApplication() Returns the ServletContext of your web application.
protected java.lang.String	getInnerActionName(javax.servlet.http.HttpServletRequest req) The action name may include an Inner Action.
protected java.lang.String	getURI(javax.servlet.http.HttpServletRequest req) Returns the URI from this request.
void	init(javax.servlet.ServletConfig conf) Initialize the Controller, creating and starting the ApplicationManager.
static Consequence	invokeAction(ActionConfig ac, Action action, java.lang.String innerAction, java.util.List<java.lang.Object> filters, java.lang.StringBuilder returnedResult) Invoke an action and return the consequence generated by this invocation.
protected void	prepareAction(Action action, javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res) Subclasses of this controller may override this method to have a chance to prepare the action before it is executed.
protected void	service(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res)
static void	setAppManager(ApplicationManager applicationManager)
static void	setConsequenceProvider(ConsequenceProvider provider)

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service

Methods inherited from class javax.servlet.GenericServlet

getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

appContext

protected static ApplicationContext appContext

Constructor Detail

Controller

public Controller()

Method Detail

init

public void init(javax.servlet.ServletConfig conf)
          throws javax.servlet.ServletException

Initialize the Controller, creating and starting the ApplicationManager.

Specified by:

init in interface javax.servlet.Servlet

Overrides:

init in class javax.servlet.GenericServlet

Parameters:

conf - the ServletConfig.

Throws:

javax.servlet.ServletException

setConsequenceProvider

public static void setConsequenceProvider(ConsequenceProvider provider)

destroy

public void destroy()

Destroy all filters defined in the ApplicationManager, call the destroy() method of ApplicationManager, then call super.destroy() to destroy this servlet (the Controller).

Specified by:

destroy in interface javax.servlet.Servlet

Overrides:

destroy in class javax.servlet.GenericServlet

getApplication

public static javax.servlet.ServletContext getApplication()

Returns the ServletContext of your web application.

Returns:

The ServletContext of your web application.

getURI

protected java.lang.String getURI(javax.servlet.http.HttpServletRequest req)

Returns the URI from this request. URI = URI - context - extension. This method is used by getActionName and getInnerActionName. You may call this method in your own controller subclass. Ex: /myapp/UserAction.add.mtw will return UserAction.add

Parameters:

req -

Returns:

The URI

getActionName

protected java.lang.String getActionName(javax.servlet.http.HttpServletRequest req)

From the http request, get the action name. You may override this if you want to extract the action name through some other way.

Parameters:

req - The http request

Returns:

The action name

getInnerActionName

protected java.lang.String getInnerActionName(javax.servlet.http.HttpServletRequest req)

The action name may include an Inner Action. For example: for bookmanager.add.mtw the action name is "bookmanager" and the inneraction name is "add". If you want to extract the inner action through some other way you can override this method in your own controller.

Parameters:

req -

Returns:

The inner action name or null if there is no inneraction.

prepareAction

protected void prepareAction(Action action,
                             javax.servlet.http.HttpServletRequest req,
                             javax.servlet.http.HttpServletResponse res)

Subclasses of this controller may override this method to have a chance to prepare the action before it is executed. This method creates and injects in the action all contexts, input, output and locale.

Parameters:

action - The action to prepare for execution

req - The http request (input will need that)

res - The http response (output will need that)

Since:

1.2

service

protected void service(javax.servlet.http.HttpServletRequest req,
                       javax.servlet.http.HttpServletResponse res)
                throws javax.servlet.ServletException,
                       java.io.IOException

Overrides:

service in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

java.io.IOException

invokeAction

public static Consequence invokeAction(ActionConfig ac,
                                       Action action,
                                       java.lang.String innerAction,
                                       java.util.List<java.lang.Object> filters,
                                       java.lang.StringBuilder returnedResult)
                                throws java.lang.Exception

Invoke an action and return the consequence generated by this invocation. This method also return all filters that were executed together with the action inside the filters list parameter.

Parameters:

ac - The ActionConfig which contains the consequences for this action.

action - The action to invoke.

innerAction - The inner action to execute or null to execute the regular action (execute() method).

filters - The filters that were applied to the action. (You should pass an empty list here!)

Returns:

A consequence generated by this invocation.

Throws:

ActionException - if there was an exception executing the action.

FilterException - if there was an exception executing a filter for the action.

java.lang.Exception

setAppManager

public static void setAppManager(ApplicationManager applicationManager)