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I am looking for a interactive reporting framework / tool / engine in java similar to Saiku - http://demo.analytical-labs.com/. However, some thing that doesn't work on Cubes but rather 2-dimensional "datasets".
The reporting tool should provide basic features such as filter, sort, aggregate, export, annotate, etc.
Is there any such open source reporting tool?
Jaspersoft has come up with Ad Hoc reporting which is exactly what I want.
It allows to create domains from RDBMS, avoiding MDX hussle and you can still view your data in multiple dimensions using Ad Hoc reporting.
Jaspersoft and SpagoBI provide domains where you can specify your dataset and build reports over them. Both interactive and scheduled.
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I have a big code written in JSP and ADF which is related to a big database.
The client wants to make a report generator for him, So he can create reports with the columns he wants..
What's the best choice of an open source Library I can use ?
Oracle Apex' Interactive Reports offer quite a lot for end users - your (I mean, developer's) query might look likeselect * from ..., and end user can then select columns he wants, group them, perform filters, aggregates, draw charts ... Really nice. Best of all: it is Oracle, and it is free.
Printing, though, isn't that simple, but - from my experience, users (for some reason) adore Excel. Regarding the fact that you can easily download report into Excel, that might suit their needs.
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I have written a complex simulation software in Java, in which I need to use a lot of statistical distributions (Gamma, Poission, and Exponential). So far, I have been using the Apache Commons library for this, but the calls to Apache Commons are consuming a lot of runtime, which I found out by using a Java profiler (yourkit). The average runtime is > 4minutes, which is unacceptable for me.
Since I am trying to shorten my program's runtime, I was wondering if there is any better library which I might include/attach directly with my Java code?
I use the Eclipse IDE.
Try this,
JDistlib—Java Statistical Distribution Library.To find more, click here
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I am creating a web application in Java, I want to check how efficiently can my code execute?
Are there any benchmark tools for testing Java Code?
If you like to test the whole http call response time you can use tools like Jmeter.
It is an open source tool:
Apache JMeter may be used to test performance both on static and dynamic resources
and again
You can use it to make a graphical analysis of performance or to test your server/script/object behavior under heavy concurrent load.
In the past I used it when I worked in a team responsible for performances of a big italian web site.
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I need a tool for generating control flow in java, but not a visual draw, something that I can work with like with path conditions or so.
Anyone ?
To future record, what I´ve found that best suits to my needs is Soot.
http://www.sable.mcgill.ca/soot/
The ASM library can do that, at the JVM-bytecode level. See Method Analysis and Control flow analyses in http://download.forge.objectweb.org/asm/asm4-guide.pdf (page 121).
Atlas is an Eclipse plugin that enables program analysis. It has a querable graph database that includes the control flow graph (as well as data flow and other relationships).
Maybe this is what you were looking for http://www.jboss.org/jbpm
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I would like to get your opinion on this topic : I'd like to build some social/collaborative app : not much media sharing, but mainly tagging, collaborative text content (as wikis), user profile, tagging and some points system (digg/hackernews-like ?)
The choice of webapp framework is generally not influenced by the problem domain of webapp that you'll be building. Some frameworks are better at certain processes, like page-flow wizards, but you couldn't really pick one on the basis of your described type of application.
The general advice holds here:
pick the framework you're already familiar with, or
pick one you think looks easiest, or
pick one you want to learn.