Package com.saperion.web

Class WebAppInitUtil

java.lang.Object

com.saperion.web.WebAppInitUtil

public class WebAppInitUtil
extends java.lang.Object

This class is a web filter and can be used to initialize a web application. It is capable of handling multiple instances of WebAppInitializer to dynamically initialize the web application. WebAppInitializer can be registered as initialization-parameters in the web.xml. The order of the WebAppInitializer classes can be specified by the initialization parameter 'INIT_ORDER'.

Author:

sts

Constructor Summary

Constructors

Constructor	Description
WebAppInitUtil()

Method Summary

Modifier and Type	Method	Description
void	contextDestroyed(ServletContextEvent sce)	Is called when is the server / the application is shut down.
void	contextInitialized(ServletContextEvent sce)	Is called when the server / the application is started.
WebAppInitializer	getInitializer(java.lang.String name)	Returns the WebAppInitializer by the given name if existing, null otherwise.
static WebAppInitUtil	getInstance()	Returns the instance of this WebAppInitUtil.
protected void	loadInitilizers(ServletContext c)	Loads the registered initializers as given as initialization parameters in web.xml.
WebAppInitUtil	removeInitializer(java.lang.String name)	Removes the WebAppInitializer by the given name if existing.
WebAppInitUtil	setInitializer(java.lang.String name, WebAppInitializer webAppInitializer)	Sets the given WebAppInitializer by the given name if not already existing.

Methods inherited from class java.lang.Object

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

Constructor Detail

WebAppInitUtil

public WebAppInitUtil()

Method Detail

getInstance

public static WebAppInitUtil getInstance()

Returns the instance of this WebAppInitUtil. If no instance was created by the servlet container

Returns:

the instance of this WebAppInitUtil.

getInitializer

public WebAppInitializer getInitializer(java.lang.String name)
                                 throws java.lang.Exception

Returns the WebAppInitializer by the given name if existing, null otherwise.

Parameters:

name - The name of the WebAppInitializer to get.

Returns:

the WebAppInitializer by the given name if existing, null otherwise.

Throws:

java.lang.Exception - if this WebAppInitUtil was not initialized by the servlet container yet.

setInitializer

public WebAppInitUtil setInitializer(java.lang.String name,
                                     WebAppInitializer webAppInitializer)
                              throws java.lang.Exception

Sets the given WebAppInitializer by the given name if not already existing.

Parameters:

name - The name of the WebAppInitializer to set.

webAppInitializer - The WebAppInitializer to set.

Returns:

instance of this WebAppInitUtil.

Throws:

java.lang.Exception - if this WebAppInitUtil was not initialized by the servlet container yet.

removeInitializer

public WebAppInitUtil removeInitializer(java.lang.String name)
                                 throws java.lang.Exception

Removes the WebAppInitializer by the given name if existing.

Parameters:

name - The name of the WebAppInitializer to remove.

Returns:

instance of this WebAppInitUtil.

Throws:

java.lang.Exception - if this WebAppInitUtil was not initialized by the servlet container yet.

loadInitilizers

protected void loadInitilizers(ServletContext c)

Loads the registered initializers as given as initialization parameters in web.xml. Overwrite this method to load initializers more elegant.

Parameters:

c - The ServletContext

contextInitialized

public void contextInitialized(ServletContextEvent sce)

Is called when the server / the application is started. Registers WebAppInitializer and calls onWepAppInit on all registered WebAppInitializers.

Parameters:

sce - The ServletContextEvent.

contextDestroyed

public void contextDestroyed(ServletContextEvent sce)

Is called when is the server / the application is shut down. Calls onWepAppDestroy on all registered WebAppInitializers.

Parameters:

sce - The ServletContextEvent.