Eclipse Unable To Install Breakpoint Maven

. What on earth is dynamic instrumentation code coverage and why you may want it?Java code coverage tools, like these embedded in IDEs or provided as CI environments plugins are great, but they have one limitation – the tests you run have to also be written in Java or other JVM language. What if you have suites of tests in other, non JVM languages and would like to know what is covered and what is not?I’ve faced such an issue – we had a really big suite of e2e REST API tests written in Python, and executed them against big Java application running on Tomcat. We wanted to track, where do these tests go in the code.

Eclipse Install Maven

But how to check it?Possible solution is so called dynamic instrumentation of Java code using Java agents. Shortly speaking Java agent triggers in the moment of classloading and transforms class bytecode to save some statistics about executed lines. Magic applied in practice.According to my research there are two reasonable solutions providing (among other features) the dynamic instrumentation:. Jacoco – having an agent mode; recognizable by some people ( as of February 2019 ), not necessarily due to it’s capabilities for outside-java-triggered execution, but for its Maven plugins integrated with Jenkins plugins, Sonar plugins, etc.

I used it in some of previous projects to observe code coverage from release to release, so it was my first shot. Disappointingly for this use case it didn’t work well. More on it in the.

JCov – having an agent mode; developed as a tool targeted at Java Java developers (not a typo, I mean people actually developing Java, yep). Probably originating in the depths of Oracle basements. Known by a small group of unicorns ( and reasonable presentation).

You have to checkout and build it yourself. I went there, I’m alive, and I’m coming with a practical tutorial.I used it for generating code coverage reports while running e2e Python tests, but of course with such flexible agent you can track coverage of the code called anyhow you want. Postman suite?

Clicking around the GUI wondering how the heck it works inside without staring at the debugger? Here you go. Dynamic vs static instrumentationAs I mentioned before, the instrumentation (process of altering the bytecode of examined classes) may be dynamic, and this is the flavour I used, but it can also be static. With static instrumentation you mutate the class files before you run them to gather coverage statistics.

In comparison to dynamic instrumentation it makes execution faster (as there is no overhead on classloading) and it consumes much less memory resources in general. JCov also supports static instrumentation, I haven’t tried it though, as dynamic mode was more suitable for me. You can find more information on static instrumentation mode in the linked from JCov developers themselves and also in the indispensable verbose help mode built in the jcov.jar. Setup and operating instructions for JCov in dynamic mode for Tomcat application. Building the tool itselfIt is not that easy to start with JCov. Actually you have to build it yourself using manually downloaded dependencies, as site with released versions doesn’t really work. I have built the final jcov.jar for you, and also I provided intermediate dependencies copied to save you from hassle looking up the dependencies over the net.

But I still recommend to download the sources yourself, as with documentation being scarce going to the sources can show you some hidden functionalities. At least that was my case.If you want to prepare it yourself go as follows:, although they seem to be a bit ‘vintage’, as JCov supports modern Java versions, and readme still refers to JDK5.

I built it on JDK8. Clone jcov mercurial repo: hg clone You will need following Jar dependencies built/downloaded manually to build JCov (I post exact versions which I used, maybe other will work too):Asm-7.0.jarAsm-tree-7.0.jarAsm-util-7.0.jarjtharness-45-dev-bin-b27-19apr2013/lib/javatest.jarI have found them in the various places on the web. You can also download them from my github repository. Edit /build/build.properties file, setting paths to aforementioned jars.# path to asm librariesasm.jar = /asm-7.0.jarasm.tree.jar = /asm-tree-7.0.jarasm.util.jar = /asm-util-7.0.jar# path to javatest library (empty value allowed if you do not need jtobserver.jar)javatestjar = /javatest.jar. Go to /build directory and execute ‘ ant’ command.

How to configure Eclipse to debug Alfresco java webscript codeNOTE: It is assumed, that Eclipse environment has been configured to work with Alfresco SDK. If it’s not true the configuration process has been described here: Select: Run menu - Debug configurations2. Create new configuration for ‘Remote Java Application’3. In ‘Project’ field select ‘home’ project (presumably your webscript project), which you want to debug (but it is also possible to debug code from Alfresco core outside selected project)4. In ‘Connection properties’ set Tomcat server IP address and debug port you defined earlier.NOTE: It’s advised against to use ‘localhost’ instead of IP address on Windows because of hosts file issues.5. Click Apply, Debug6.

If everything went correct you shouldn’t get any message.7. Switch to debug perspective8. You should see something like this. Reconnecting to debugger9. Now you can normally set breakpoints and trace code execution of your webscript or other Alfresco SDK projects.

A good test is setting a breakpoint in org.alfresco.web.bean.LoginBean at line“FacesContext context = FacesContext.getCurrentInstance;” – breakpoint should be caught at Alfresco Explorer login attemp.NOTE: You may get following error message: “Unable to install breakpoint in org.evolpe.webscripts.XMLwebs due to missing line number attributes. Modify compiler options to generate line number attributes.Reason:Absent Line Number Information”. Problem:When trying to build maven project using IAM under Eclipse I get an error like this:'Unable to locate the Javac Compiler in:C:ProgramFilesJavajre6.libtools.jarPlease ensure you are using JDK 1.4 or above andnot a JRE (the com.sun.tools.javac.Main class is required).In most cases you can change the location of your Javainstallation by setting the JAVAHOME environment variable',nevertheless I have proper installation of newest Java JDK and JAVAHOME is properly set.The problem never occured before.Solution:I know two possible causes of that problem:1.

Eclipse uses its own JRE to start, and IAM does the same. You’ve recently installed a new maven plugin and it requires JDK.You can force Eclipse to start using directly given Java VM by starting it that way from command line:“X:pathtoeclipseeclipse.exe -vm JAVAJDKPATH”2.

There also cases when IAM brokes up without apparent cause, and that happend to me.The reason may be IAM itself.Try standard tricks checklist from my another post here:. May 25, 2011.By michal.wrobel.,. If you just defined a new content type in Alfresco the cause may be empty characters at the beginning of the model context file, nevertheless it’s grammatically correct the parser can’t get through.Eg.

Unable to install break points in eclipse.This is a very common error with eclipse. When you try to set a break point, eclipse says “unable to install breakpoint due to missing line number attributes”.Description of the errorCan not set the break point. A dialog box appears with the error message likeUnable to install breakpoint in xyz class due to missing line number attributes. Modify compiler options to generate line number attributes.Reason: Absent line number attributes in generated class file.SolutionFollow this steps if you are compiling classes using eclipse1.

If you are compiling using the eclipse. Verify the class file generation options.Go to windows preferences Java compiler screen.Make sure that add line number attributes to generated files (used by debugger) check box is checked.If you don’t know, what other options are.

Check all other three check boxes also. I am using Ant to build, with debug=”yes”, Glassfish App sever with multiple domains,But, deployed application on one domain. Using Eclipse Helios Service Pack 2,Windows 7.I checkedWindow-Preferences-Java-Installed JREsandWindow-Preferences-Java-Compilerandclean builds-Many timesandExit Eclipse, Restart Machine-Many timesandeclipse plugin cleaningBut, no use.I get following error when I try to debug from IDE or Remote Debugging.“Unable to install breakpoint in xyz class due to missing line number attributes. Modify compiler options to generate line number attributes.”Following is my EclipseConfiguration Settings-startupplugins/org.eclipse.equinox.launcher1.1.1.R36xv201.jar–launcher.libraryplugins/org.eclipse.equinox.launcher.win32.win32.x86641.1.2.R36xv20101222-productorg.eclipse.epp.package.jee.product–launcher.defaultActionopenFile–launcher.XXMaxPermSize256M-showsplashorg.eclipse.platform–launcher.XXMaxPermSize256m–launcher.defaultActionopenFile-vmargs-Dosgi.requiredJavaVersion=1.5-Xms256m-Xmx1024mAny help is appreciated. Thanks for the post.

Even after doing all this, I was still facing same issue. On further investigating, I found that the build path of the main method project had reference to jar file and the source files, the order of included jar file was before the source files.

So, eclipse was looking for classes with line number inside the class files of the jar and not that of the source.Bottom line: If above steps doesn’t work, then recheck the build path to make sure debugger is looking for eclipse generated class file.