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Is there any tool sort of thing, from where we can see, for a given java source code, where variables, references, objects, static fields resides in JVM.
You can see the variable and a lot more in jvisualvm - Java Virtual Machine Monitoring, Troubleshooting, and Profiling Tool. You can see threads, garbage collection, heap memory and more. Give it a try!
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I'm looking for tools that will let me measure and compare the amount of garbage generated by certain code on the JVM.
I'm aware that tools like YourKit will allow tracking of allocations, but using that tool is very clicky-clicky. (Change code, run with agent, enable tracking, run actual code, take snapshot, etc) It requires a lot of my time/work per iteration.
I'm ideally looking for something like a microbenchmark suite, where it's easy to tweak something and take a new measurement. But instead of measuring speed, I'm interested in measuring allocations.
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I am looking for some opensource in Java thats able to do following things
1.Run some number of threads
2.Have a control on each one of those threads ( like if I want to shutdown some of them - I can do it)
anyone knows something like that?
thanks in advance
It seems that you are looking implementation of thread pool. Fortunately JDK has one built-in. Take a look on Exectutors framework.
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I am looking for an online compiler where it is supported to choose version of java runtime.
Because I want to try things that was not available in older versions of java to feel the difference.
Is there such compilers?
http://ideone.com is for me the best online compiler, it supports up to 40 languages and has almost no restrictions, i think you can choose between a couple of Java versions, not sure which ones.
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we started with static code analysis and I would like to see how we compare with other projects. Now I am aware I could go out and run tools for different OS projects, but I was curious if there is a repository for this data. such as
cyclomatic complexity, code coverage, size of methods, size of classes, scope nesting, etc
thanks
almir
For Java OS projects a free monitoring system with some metrics is available here: http://opensource.quality-gate.com/
Ohloh.net has a few of the metrics you mentioned
FLOSS Metrics may have some
FLOSSmole - includes data from the now-defunct SourceKibitzer though it's a little old (2007), as well as the same metrics run on Debian packages in 2011
Sourcerer may have some
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Is there anything out there which is similar to this tool? I'm hoping to do some verification of our caching setup with Hibernate.
I found TPTP, but it seems that the project is dead.
Is there any other good profiling tool out there to verify Hibernate Caching configurations?
You could try jvisualvm, it is bundled with the jvm since 1.6_10.
It should enable you to inspect the heap and stack, even against jvm's that are running on a remote host.
Have you tried yourkit? In J2EE mode it can show you the Database calls you app does. If you dont implement caching properly it will show you the extra calls. It has a free 30 day trial. Should be enough for a one off test