Examples of com.acciente.induction.controller.Controller

Package com.acciente.induction.controller

Examples of com.acciente.induction.controller.Controller

com.acciente.induction.controller.Controller
This interface is used to mark a specific class as a controller. This interface exists primarily to enhance security by explicitly marking a class that may be invoked as a controller by the framework.
A class implementing this interface is expected to have a single public contructor with its formal parameter list observing the following convention:
- the single constructor should accept no formal parameters or
- the single constructor should declare formal parameters using only the
following types:
- javax.servlet.ServletContext
- javax.servlet.ServletConfig
A class implementing this interface may optionally define a single public method named init(). If defined this method will be called after the controller is created using the constructor. The init() method if defined should have its formal parameter list observe the convention described above for the constructor.
A class implementing this interface may optionally define a single public method named destroy(). If defined this method will be called when the controller instance is taken out of service. If there is more than one destroy method or if it the single destroy method requires arguments then the method will be ignored.
@created Mar 14, 2008 @author Adinath Raveendra Raj

                          HttpServletRequest             oRequest,
                          HttpServletResponse            oResponse,
                          Throwable                      oError )
      throws ControllerExecutorException
   {
      Controller  oController;


      try
      {
         oController = _oControllerPool.getController( oResolution.getClassName() );
      }
      catch ( ClassNotFoundException e )
      {
         throw new ControllerExecutorException( oResolution.getClassName(), oResolution.getMethodName(), "unable to load class definition", e );
      }
      catch ( ConstructorNotFoundException e )
      {
         throw new ControllerExecutorException( oResolution.getClassName(),
                                                oResolution.getMethodName(),
                                                "unable to find constructor", e );
      }
      catch ( InstantiationException e )
      {
         throw new ControllerExecutorException( oResolution.getClassName(),
                                                oResolution.getMethodName(),
                                                "instantiate error", e );
      }
      catch ( InvocationTargetException e )
      {
         throw new ControllerExecutorException( oResolution.getClassName(),
                                                oResolution.getMethodName(),
                                                "target exception", e );
      }
      catch ( IllegalAccessException e )
      {
         throw new ControllerExecutorException( oResolution.getClassName(),
                                                oResolution.getMethodName(),
                                                "access exception", e );
      }
      catch ( ParameterProviderException e )
      {
         throw new ControllerExecutorException( oResolution.getClassName(),
                                                oResolution.getMethodName(),
                                                "parameter exception", e );
      }


      // use performance enhanced reflection to determine the methods in the controller with the specified name
      Method oControllerMethod;
      try
      {
         oControllerMethod = ReflectUtils.getSingletonMethod( oController.getClass(),
                                                              oResolution.getMethodName(),
                                                              oResolution.isIgnoreMethodNameCase() );
      }
      catch ( MethodNotFoundException e )
      {

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      // the class definition may have changed so we have to load the class unconditionally our
      // classloader caches so if the class is unchanged this call just returns the last loaded class
      Class oLatestControllerClass = _oClassLoader.loadClass( sControllerClassName );


      // check if we have a cached controller instance
      Controller  oController = ( Controller ) _oControllerCache.get( sControllerClassName );


      if ( oController == null )
      {
         // no controller instance in cache so create one and cache
         _oControllerCache.put( sControllerClassName, oController = createController( oLatestControllerClass ) );
      }
      else
      {
         // ok there is a cached entry, check if the controller class has changed since the instance was cached
         if ( oController.getClass().hashCode() != oLatestControllerClass.hashCode() )
         {
            // yes the class has been reloaded so decommission the previous controller
            // and then create a new controller instance
            ObjectFactory.destroyObject( oController );

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Related Classes of com.acciente.induction.controller.Controller

com.acciente.induction.dispatcher.controller.ControllerExecutor

com.acciente.induction.dispatcher.controller.ControllerPool

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