Web Application - Data caching of enterprise data

Sorry in advance if this is off-topic but I can't find anywhere else to post this type of question.
I am looking for information/suggestions such as books, technology or design methodology for my enterprise web applications. These sites are currently up and functional using only JSP, servlets and regular Java classes stored in a web application session to provide data caching and access. We are using Weblogic Server 6.1 running on an AIX Unix system at this time. I'm not sure that this is the best design architecture as our web sessions are getting too large but I can't think of any other Java technology to use and I need some help. Here's an overview of our environment and our needs.
Our core data is held in a mainframe based IMS system. Some DB2 is also used. Access to this data is through IMS COBOL transactions which we can execute with IMS Connect. We also use some JDBC to get to the DB2 tables directly where available.
Some overall application data is cached when the web application is deployed. We use singleton classes which are created and refreshed at deployment and they then refresh themselves from the sources every 24 hours.
Each time a user logs in we execute several IMS transactions and JDBC calls to cache user specific data in regular Java classes which are then simply placed in the users web session where we access them from JSP, servlets and other Java classes. The fields in these Java classes range from any type of primitive field to TreeMaps of other Java classes. As the data is cached it is sorted and other fields are calculated and stored in these classes. As the user progresses through the system we then may have to do several other IMS transaction and JDBC calls to collect other types of data. All of this is then also added to the users session. Most of this in inquiry. We do allow transactions but those are built from user input and data already cached and are then we just execute the IMS transactions with the input.
As our application has grown these Java classes have gotten larger and larger. And since these are simply stored in server memory in the web sessions then these are also getting huge. I'm concerned that this is not the best way for this application to be architected. Is there something else we should be doign? I simply don't understand how Entity Java Beans could be used but then again I don't know much about them. I wouldn't think that caching the data to a local database and accessing it from there would be any more efficient and would probably just slow down the system from all the I/O.
Any help or direction would be greatly appreciated.

The best book you can buy is 'Professional Java Server Programming, j2ee edition' by Wrox. It is by far the best reference I've used. Another quick reference consideration might be the j2ee book provided by codenotes... its quick and to the point.

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UCCX copy data in the enterprise data window right to the clipboard

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Thanks.Hello I need help please! how to write a macro to copy data in the enterprise data window right to the clipboard? I should be able to take the data right from enterprise data and copy it to the clipboard so the agent can paste it into any application they want. The macro step wants an application first - how do I get around this?
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Do you have more than one enterprise fields showing your CAD layout?
Do you wish to copy all of the them or just one of them?
Do you wish to copy the name as well as the value?
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See this video here, which shows me doing just that:
http://www.youtube.com/watch?v=88E-z0ShlFE&list=UUkB02mmFBBZqVBWY5XHAsoA&index=12&feature=plcp
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Anthony Holloway
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How do I setup SharePoint 2013 web applications for 2 TB of data?

Hi,
I know Microsoft recommend to have 1 App pool with 1 Web App and 1 Content Database.
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Chicho84,
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http://technet.microsoft.com/en-us/library/jj219628.aspx#HW_Enterprise
http://social.technet.microsoft.com/wiki/contents/articles/12438.community-best-practices-for-sharepoint-2013.aspx
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Saving it to disk seems like your only alternative.
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Make the directory an environment variable/init parameter in your web.xml file.
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Hello Glenn-
Thanks for the reply. On reading dbag ahead it states:
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Need input on data cache

Hi All,
This is the situation..
Data cache = 3mb (default)
Data block size = 20kb
so number of blocks a memory segment (data cache) can hold is 157
What will happen If user is retrieving 300 blocks in one retrieval ?
I know swapping will takes place for multiple retrievals.
I know that agg cache in ASO will increase till OS say no it.
Will Essbase tries to increase data cache....?? if so how it works??
My understanding is Essbase tries to increase data cache and it may touch the wrong segment in memory to create a segment violation to crash!!
As per the modern OS, virtual memory management using pages and segments ...I think this will takes place!!
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Edited by: Jithendra on Mar 28, 2011 7:12 PM
Edited by: Jithendra on Mar 28, 2011 7:14 PM
Edited by: Jithendra on Mar 28, 2011 7:15 PM

Hi,
I just did an initial analysis....
It is always 3mb. (never increased it)!!
XCP log says it stopped at executing the maxl!! ..like (Maxl pending)
and its an segmentation violation!!
from my understanding segmentation violation is something to do with kernal memory allocation, virtual memory and physical memory.
I cannot try the same on prod server (pls don't ask why the settings are default etc ..I'm new to the system)
I just provided an intial analysis telling that at this point of time...the highly visible point to me is data cache in buffered I/o.
The segmentation violation can also happen at total level of availability of RAM.
but in our case we are using only 1/3rd of the Total available RAM.
memory in all applications = (1/3rd of available RAM)
and its a Maxl operation...
by seeing al this i suspected the application cache.(data cache)
I posted only to gather little mor info and to have a debate to get clear understanding.
Thanks for your support and input...
Please advice
Thanks,
Jeeth
Edited by: Jithendra on Mar 29, 2011 1:37 AM

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Maximum Heap Usage in KB (table ALLOCATORSTATISTICS)
System Heap in KB (table ALLOCATORSTATISTICS)
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Adjusting CALCLOCKBLOCK and data cache

if my block size is 37464 then what should my CALCLOCKBLOCK size in the cfg.file be
Per doc (Max=half of the number of block that can fit in to the data cache)
and my data cache is 3072 kb
what is the best setting for the data cache and the CALCLOCKBLOCK
or should i just use a Data memory loclking
and if i do use the the data cache lock what would be the CALCLOCK BLOCK Setting
this is how is set it up in my cfg.file
//Set Calc Lock Block, How many block can be locked at one time
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Please advise
Edited by: Next Level on Jul 4, 2012 2:05 AM
Edited by: Next Level on Jul 4, 2012 2:11 AM
Edited by: Next Level on Jul 4, 2012 2:35 AM

FWIW, I have never, and I mean never touched CALCLOCKBLOCK. I can see why one might want to fiddle with it, but in 18 years (yikes!) of BSO development, I have never seen a reason to do it.
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Cameron Lackpour

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Woudl the community agree that, with respect to Enteprise Data;
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Hi,
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G.

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http://support.peopleperhour.com/entries/68630566--C-mon-lets-Watch-The-Other-Woman-2014-full-movie-online-free
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http://support.peopleperhour.com/entries/68125597--%D0%BC-v%C9%AA%C9%9Bc-%C3%A4st-Watch-The-Lucy-2014-full-movie-free
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There is no real "difference". Web site is a more anachronistic term that exists from the early days of
the internet where the notion of a dynamic application that can respond to user input was much more limited and much less common. Commercial websites started out largely as interactive brochures (with the notable exception of hotel/airline reservation sites).
Over time their functionality (and the supporting technologies) became more and more responsive and the line between an application that you install on your computer and one that exists in the cloud became more and more blurred.
If you're just looking to express yourself clearly when speaking about what you're building, I would continue to describe something that is an interactive brochure or business card as a "web site" and something that actually *does something that feels
more like an application as a web app.
The most basic distinction would be if a website has a supporting database that stores user data and modifies what the user sees based on some user specified criteria, then it's probably an app of some sort (although I would be reluctant to describe Amazon.com
as a web app, even though it has a lot of very user-specific functionality). If, on the other hand, it is mostly static .html files that link to one another, I would call that a web site.
Most often, these days, a web app will have a large portion of its functionality written in something that runs on the client (doing much of the processing in either javascript or actionscript, depending on how its implemented) and reaches back through some
http process to the server for supporting data. The user doesn't move from page to page as much and experiences whatever they're going to experience on a single "page" that creates the app experience for them.

...can i make as many iweb websites as i want? ...and as many blogs as i want? ...i have never made one before....
....although, i do have my own small business and i do have a website that i paid a guy to make and also host....(which is a waste of $$$$ in my opinion as i think i can do a better job making one myself through iweb) ....
...anyways, i know it is splitting hairs but what exactly is the diff b/w a blog and a website ....i am under the impression that a blog is just a personal newsletter sort of thing,...?

Graduation project: ideas for a web application

Hello,
I apologize for posting this topic in here but I just need ideas from more experienced developers, we are a group of 5 students in computer science department and we are required to make a graduation project for a 1 year perioed, we have an average experience in J2EE, JSP, struts and JSF and J2SE and we are required to make the project as a web application but we just couldn't find any new or interesting ideas all the web application are either blogs, emai/webmai, Content Management systems, Customer relationship management, ... but we are looking for a new ideas, we've been googling for more than a month now and we've already checked alot of posts in this forum for ideas. we just want to know what services people need from the internet that could be made as a web application. Thank you very much

Rather than looking for a cool "theme" can you give some ideas of what you need to showcase in this application?
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Will demonstrate both user interface, and back end functionality.
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Hi,
I have a java class which can to insert data into a data base MS ACCESS XP. My java class is ok.
I create a JSP which use my java class.
So I use Apache Tomcat, i have a directory webapps, and in this directory i have a directory 'JSP' where i place my .jsp. In the directory webapps, i have another directory web-inf where i have a directory 'classe' where i place my .class.
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Where the driver must be placed?
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Excuse me for my english, I'm from belgium and speak french.
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Hi ju_fa,
I wouldn't deploy an app this way.
I'd recommend that you create a WAR file and put that in the TOMCAT_HOME/webapps directory instead of creating a WEB-INF.
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The best thing to do is to look at the Tomcat docs about how to create a JNDI data source:
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-examples-howto.html
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Hi,
i try to build a Web Application in which the the Date (0CALDAY) is addicted to the actual day and then do an offset of 7/14/31 days on it. The offset should be chosen by an Tabstrip (one for 7, one for 14, one for 31), but the Query should always be the same.
But i can't find the option in WAD to set the selection state on a variable with an offset.
Is there any possibility?
I hope you could follow my problem, i'm not an english native speaker...

I think you should be able to set the state of the variable with a 'variable type' = binding type. Then for binding type select variable and then select a special variable (new to be created in query, maybe filled with userexit or just one based on selected date in query with offset) to fill this value.
Hope this helps you on your way
C.

Web Application - Data caching of enterprise data

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