In this chapter we will walk through the steps needed to migrate the Form Tags sample application from a standard Java EE WAR to a fully OSGi compliant Shared Services WAR within a PAR. The migration involves four packaging and deployment formats:
Each of these migration steps will produce a web application that can be deployed and run on the VTS.
		After summarising the process, an example
		plan
		is shown which is another way of
		packaging and deploying the application.
	
		The following image displays the directory structure you should have
		after installing the Form Tags sample. Note however that the release
		tag
		will typically resemble
		3.0.0.RELEASE
		.
	
		 
	
		The
		dist
		directory contains the distributables,
		and the
		projects
		directory contains the source code
		and build scripts.
	
For simplicity, this chapter will focus on the distributables—which are built using Virgo-Build rather than on configuring a project in an IDE.
| ![[Tip]](images/tip.gif) | Tip | 
|---|---|
| Pre-packaged distributables are made available in the distdirectory;
			however, if you would like to modify the samples or build
			them from scratch, you may
			do so using Virgo-Build. Take a look at
			theREADME.TXTfile in each of the folders under
			theprojectsdirectory in the
			Form Tags sample for instructions. | 
The sample that we will be using is the Form Tags show case sample which was provided with Spring 2.0. The Form Tags application has been removed from the official Spring 2.5.x distributions; however, since it is relatively simple but still contains enough ingredients to demonstrate the various considerations required during a migration, we have chosen to use it for these examples.
			The purpose of the Form Tags show case sample was to demonstrate how
			the Spring specific
			form:
			tags, released
			in Spring 2.0, make view development with JSPs and tag
			libraries easier.
			The Form Tags application consists of a single
			UserService
			which returns a list
			of
			Users
			. Furthermore, the application demonstrates how to list, view,
			and
			edit
			Users
			in a simple Spring MVC based web application using JSP
			and JSTL.