Using Session Bean as session facade 2005-04-01 - By Shanmugavelu, Subramaniam (Cognizant)
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Mich:
Agreed on assuming it is not a multiprocessor/SMP or a clustered system.
In a non-clustered environment, multiple POJO instances can be expected
to be distributed to increase the scalability.
--
Subra
Subramaniam Shanmugavelu
subramaniam.shanmugavelu@(protected)
-- --Original Message-- --
From: An interest list for Sun Java Center J2EE Pattern Catalog
[mailto:J2EEPATTERNS-INTEREST@(protected)] On Behalf Of Mich
Hagdishovich
Sent: Friday, April 01, 2005 10:46 AM
To: J2EEPATTERNS-INTEREST@(protected)
Subject: Re: Using Session Bean as session facade
Subra:
If the POJO has no synchronized blocks inside it, there is no reason for
performance to be hit. Theoretically, and concretely, the two following
systems will perform almost equivalently, with system A performing
slightly better than system B.
System A: Single POJO singleton, with 1000 clients accessing it.
System B: 1000 POJO instances of same class, with 1000 clients accessing
the instances.
Mich Hagdishovich
Genetics Software www.kromosoft.com
On Fri, 1 Apr 2005 09:42 , 'Shanmugavelu, Subramaniam (Cognizant)'
<Subramaniam.Shanmugavelu@(protected)> sent:
>Won't the scalability take a big hit if a singleton is used by all
>client? I remember working in a project where this problem happened.
>A POJO that was designed as a Singleton became the bottleneck to
>performance.
>
>
>--
>Subra
>Subramaniam Shanmugavelu
>subramaniam.shanmugavelu@(protected)
>V-net: 48301
>Phone: +91 44 52098301
>
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