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From: Martin Gainty <mgainty@hotmail.com>
To: Struts Users Mailing List <user@struts.apache.org>
Subject: RE: Struts 1 migrate to Struts 2 question
Date: Wed, 23 Dec 2015 08:13:21 -0500
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> Date: Tue=2C 22 Dec 2015 20:38:47 -0500
> Subject: Re: Struts 1 migrate to Struts 2 question
> From: davelnewton@gmail.com
> To: user@struts.apache.org
>=20
> >
> > The effort required to upgrade and test a large application to Struts
> > version 2 looks very large.  The effort to upgrade and test the entire
> > application in a single release looks undoable.
> >
>=20
> Agreed.
>=20
>=20
> > 1)      Are there any software tools that can be used to speed up the t=
ime
> > to update JSPs=2C page validation=2C tag library calls=2C Action classe=
s=2C etc to
> > reduce development=2C improve code quality=2C and reduce testing time?
> >
>=20
> None that I'm aware of.
>=20
>=20
> > 2)      Can a single application use both Struts 1 and Struts 2 at the
> > same time?
> >
>=20
> Yes.
>=20
>=20
> > a.       Would it be feasible to use Struts 2 for any new pages and
> > upgrade to Struts 2 for any pages being changed for other reasons?
> >
>=20
> Yes.
>=20
>=20
> > 3)      We do an application release every 6 weeks or so.  We can't do
> > this in one release unless we find or develop a tool to help us convert
> > pages to Struts 2.  We are considering upgrading 100 pages per release =
to
> > Struts 2.  Has anyone done something like this successfully?  What are =
best
> > practices and lessons learned?
> >
>=20
> That strikes me as a fairly aggressive timeline=2C obviously it depends o=
n
> the pages and functionality.
>=20
> There are zero similarities between S1 and S2. If your S1 app was
> well-architected the effort will be confined to the view and controller
> layers=2C at least=2C but even that is non-trivial.
>=20
> 4)      Test effort.  With all of the code changes required it seems that
> > developers could miss things.
> >
>=20
> If you have no integration tests=2C then yes=2C this will be fraught with
> potential issues. Again=2C a well-architected S1 app is in less danger si=
nce
> the important business logic is already isolated and Struts acts only as =
a
> mediation layer between the client (e.g.=2C the browser or API users) and=
 the
> business logic.
>=20
> The ultimate answer(s) really depends on the nature of your app. If the J=
SP
> pages are simple it might be possible to write a small conversion tool th=
at
> does a rough translation between tag libraries=3B beyond that... it'll be
> mostly manual labor.
>=20
> Dave

MG>Dave is right
MG>the Struts2 wrapper for existing Struts1 Actions and Struts1 Action Form=
s is called "struts-1-plugin"
MG>To use existing Struts1 Actions and ActionForms into a Struts2 Applicati=
on=2C create a normal Struts2 configuration package in struts.xml but MG>ha=
ve it extend struts1-default. Struts1-default paclage contains interceptors=
 and a default interceptor stack that work this plugin INTO the MG>Struts2 =
request process
MG>the interceptor-ref interceptor named struts1-default is the interceptor=
 that manages the creation and scope of your ActionForm:<action name=3D"myF=
ormAction" class=3D"org.apache.struts2.s1.Struts1Action">  <param name=3D"c=
lassName">com.mycompany.myapp.MyAction</param>   <interceptor-ref name=3D"s=
copedModelDriven">    <param name=3D"className">com.mycompany.myapp.MyForm<=
/param>    <param name=3D"name">gangsterForm</param>    <param name=3D"scop=
e">session</param>  </interceptor-ref>  <interceptor-ref name=3D"struts1-de=
fault"/>   <result>myAction.jsp</result></action>MG>struts1-default package=
 itself is declared in src/main/resources/struts-plugin.xml (inside the plu=
gin) the declaration should start with:
MG><struts>MG>    <package name=3D"struts1-default" extends=3D"struts-defau=
lt">MG>Doc available at:MG>https://struts.apache.org/docs/struts-1-plugin.h=
tml
MG>be sure to copy struts2-struts1-plugin*.jar to /WEB-INF/lib and copy str=
uts1*.jar to WEB-INF/lib before restarting webapp
>=20
> --=20
> e: davelnewton@gmail.com
> m: 908-380-8699
> s: davelnewton_skype
> t: @dave_newton <https://twitter.com/dave_newton>
> b: Bucky Bits <http://buckybits.blogspot.com/>
> g: davelnewton <https://github.com/davelnewton>
> so: Dave Newton <http://stackoverflow.com/users/438992/dave-newton>
 		 	   		  =

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