Large finders on entity beans refactored

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Large finders on entity beans refactored

Large finders on entity beans refactored

2003-09-19 - By Pradeep Kumar

Back

Reply: 1 2 3 4 5 6 7 8 9 10 >>

While the container is executing the finder method, it must give identities
to each of the objects (primary keys). Hence, they must be placed in the
ready state, since objects do not have any identity in the pooled state.

Can someone please clarify the statement from the specs.

-- --Original Message-- --
From: Kalra, Ashwani [mailto:ashwani.kalra@(protected)]
Sent: Thursday, September 18, 2003 7:28 PM
To: J2EEPATTERNS-INTEREST@(protected)
Subject: Re: Large finders on entity beans refactored

Here what I read from specs 2.0

"The instance does not move to the ready state during the execution of a
finder or a home
method."
-- --Original Message-- --
From: Pradeep Kumar [mailto:pradeepk@(protected)]
Sent: Monday, September 15, 2003 9:54 AM
To: J2EEPATTERNS-INTEREST@(protected)
Subject: Re: Large finders on entity beans refactored
I totally agree. We are told that if we read a large amt of data via entity
beans, there will be too many entity objects in ready state. One can argue,
that they will be the cached data for subsequent reads (lets? say via find by
primary key), however, to avoid dirty reads, the container calls the EJB load
method, which defeats the purpose of caching

-- --Original Message-- --
From: Katz Guy [mailto:Guy_Katz@(protected)]
Sent: Sunday, September 14, 2003 12:12 PM
To: J2EEPATTERNS-INTEREST@(protected)
Subject: Large finders on entity beans refactored

Hi;
Going through the core patterns book.
There is a bad practice dedicated to not using finder methods when large
result is expected but use a DAO instead.
My understanding is that the authors want to have a 'dual interface' for
access to the same data, Modeling the data itself as entity beans yet using
DAO for the search. Is this correct?
If so, wouldn't this be in contrast to resusability? Also, isnt this a good
place to put your money on vendor container optimiations?
__ ____ ____ ____ _____
Guy Katz
Software Architect, CAP-IFS
Comverse
guy.katz@(protected)
+972 3 7663686
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<div class=Section1>

While the container is executing the finder method, it must give
identities to each of the objects (primary keys). Hence, they must be placed in
the ready state, since objects do not have any identity in the pooled state.<o
:p></o:p>

<![if !supportEmptyParas]> <![endif]><o:p></o:p>

Can someone please clarify the statement from the specs.<o:p></o:p>

<![if !supportEmptyParas]> <![endif]><o:p></o:p>

----
-Original
Message-- -- 
From: Kalra, Ashwani
[mailto:ashwani.kalra@(protected)] 
Sent: Thursday, September 18, 2003
7:28 PM 
To:
J2EEPATTERNS-INTEREST@(protected) 
Subject: Re: Large finders on
entity beans refactored

<![if !supportEmptyParas]> <![endif]><o:p></o:p>

Here what I
read from specs 2.0<o:p></o:p>

 
<o:p></o:p>

"The
instance does not move to the ready state during the execution of a finder or a
home 
method."<o:p></o:p>

<div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'>

----
-Original
Message-- -- 
From: Pradeep Kumar
[mailto:pradeepk@(protected)] 
Sent: Monday, September 15, 2003
9:54 AM 
To:
J2EEPATTERNS-INTEREST@(protected) 
Subject: Re: Large finders on
entity beans refactored<o:p></o:p>

I totally agree. We are
told that if we read a large amt of data via entity beans, there will be too
many entity objects in ready state. One can argue, that they will be the cached
data for subsequent reads (lets? say via find by primary key), however, to
avoid dirty reads, the container calls the EJB load method, which defeats the
purpose of caching<o:p></o:p>

 <o:p></o:p>

</div>

<div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'>

-- --Original Message-- -- 
From: Katz Guy
[mailto:Guy_Katz@(protected)] 
Sent: Sunday, September 14, 2003
12:12 PM 
To:
J2EEPATTERNS-INTEREST@(protected) 
Subject: Large finders on entity
beans refactored<o:p></o:p>


 <o:p></o:p>

Hi; 
Going through the core patterns book. 
There is a bad practice dedicated to not using
finder methods when large result is expected but use a DAO instead. 
My understanding is that the authors want to
have a 'dual interface' for access to the same data, Modeling the data itself
as entity beans yet using DAO for the search. Is this correct? 
<o:p></o:p>

If so,
wouldn't this be in contrast to resusability? Also, isnt this a good place to
put your money on vendor container optimiations?<o:p></o:p>

__ ____ ____ ____ _____
 
Guy Katz 
Software Architect,
CAP-IFS 
Comverse 
guy.katz@(protected) 
+972 3 7663686 <o:p></o:p>

</div>

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DISCLAIMER:
 
This message (including attachment if any) is confidential and may be
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within MindTree or outside. If you have received this message by mistake please
notify the sender by return e-mail and delete this message from your system.
Any unauthorized use or dissemination of this message in whole or in part is
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MindTree shall not be liable for any improper, untimely or incomplete
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