Hi All,
<vendor>
RE: recent posting by The Middleware company about cash for reviews of
application servers and the importance of a good CMP.
I think a good way to contribute to the 'education' and 'training' of both
'developers' and 'managers' that they draw up a list of typical cmp
scenarios including Jonathans below and then ask developers from all camps
to submit how their application server's cmp engine can handle them and
whether they are forced to purhcase a additional plug-in and additional code
specific to their containers cmp imp. I believe this would provide people
with a gimplse into the servers easy of use and flexibility. I do not think
anybody would disagree with the importance of a good cmp implementation.
Also the submissions would not be biased by their love of a company or
product.
What do people think?
Glad to see that the middleware company has included more servers in their
review list but unfortunately for all those wannabe 'educated' managers and
developers they have left out IMHO the best one of them all, Inprise
Application Server (IAS). But then again I would say that ;-).
</vendor>
-william
PS: Have people noticed how many other companies seem to be adopting 'IAS'.
We now have oracle joining us with their newly released and rewritten
Internet Application Server shortened in their markerting docs to 'iAS'. We
already know about Sun's iPlanet Application Server (iAS). I suspose Iona's
iPortal Application Server will soon be just called 'iAS'. Is this a case of
McDonalds and MacDonalds burger joints and why is the 'i' small in suns,
oracles, and iona's product. ;-).
-----Original Message-----
From: Jonathan K. Weedon [mailto:[EMAIL PROTECTED]]
Sent: Thursday, June 29, 2000 10:14 PM
To: [EMAIL PROTECTED]
Subject: Re: How to implement this finder method ??
Giri,
<vendor>
With IAS, if you have the following finder method:
Collection findByStuff(String a1, String a2, String a3, String a4, String
a5) ...;
And if these five arguments need to match five columns called
c1, c2, c3, c4, c5, then you would define your finder method as
follows:
<finder>
<method-signature>
findByStuff(String a1, String a2, String a3, String a4, String a5)
</method-signature>
<where-clause>
(:a1 is null or :a1 = c1) and
(:a2 is null or :a2 = c2) and
(:a3 is null or :a3 = c3) and
(:a4 is null or :a4 = c4) and
(:a5 is null or :a5 = c5)
</where-clause>
<load-state>True</load-state>
</finder>
What you are doing is saying: search for the non null attributes that
match the correspnding columns. If you wanted to search by attribute
a1, you would call:
home.findByStuff(a1, null, null, null, null);
if you wanted to search by a1, a3, and a5, you would call:
home.findByStuff(a1, null, a3, null, a5);
Hopefully you get the idea.
Although the syntax differs for other AppServer, I would expect that
the same can be done. (And just for fun, I challenge anyone to write
that where clause in WebLogic's LISP/XML hybrid syntax correctly by
hand ;-)
</vendor>
-jkw
> Hi folks,
>
> I am trying to write a search Servlet. This
> Servlet will delegate the search criteria to an Entity
> bean and get the results.
>
> Now I have 5 searchable fields.User can select
> one or more fields to fill in the search criteria. If
> I used bean managed persistence then I can write a
> simple method which returns an enumeration and use it
> everywhere calling the same method. This method will
> dynamically create the SQL statement and gets me back
> the results.
>
> Now the question is how do we do the same thing
> in Container managed persistence.One way is to specify
> finder methods for all the permutations and
> combinations. Then is doable, but I want to write a
> single method to do the job. I appreciate your reply.
> thanks in advance.
>
> Giri
>
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