I just started maven in general and m2eclipse in specific.
What I have been doing before is follow:
1)Deploy my application to tomcat.
2) make any changes to the java or jsp files.
3) save and run the application again ( no restart is neccessary unless I changed a config file).
now, everytime I make a minor change to my maven project in eclipse I have to do a "pre-clean install" to compile and deploy the application again and then restart weblogic 10 to view the changes.
Is there anyway ( or maybe I m not doing something right) that I when I modify a class or jsp file, the code will get compiled and deployed when I save the file like I was doing before with the eclipse default project builder and tomcat?
Also, When I checkout the maven project from SVN, Eclipes shows bunch of compiling errors due to some missing classes, but when I build the project using m2eclipse everything builds successfull. Why is eclipse not recognizing the classes??
I have looked at the following answer but I was not able to figure out the problem.
How do I start Maven "compile" goal on save in Eclipse?
now, everytime I make a minor change to my maven project in eclipse I have to do a "pre-clean install" to compile and deploy the application again and then restart weblogic 10 to view the changes.
You shouldn't have to do that. Are you using the Oracle Enterprise Pack for Eclipse (OEPE) (available from the market place or from an update site) and the WTP?
Is there anyway ( or maybe I m not doing something right) that I when I modify a class or jsp file, the code will get compiled and deployed when I save the file like I was doing before with the eclipse default project builder and tomcat?
See above.
Also, When I checkout the maven project from SVN, Eclipes shows bunch of compiling errors due to some missing classes, but when I build the project using m2eclipse everything builds successful. Why is eclipse not recognizing the classes??
Try the following: right-click on the project then Maven > Update Project Configuration.
Related
I am new to spring framework and having basic knowledge of maven. I tried to import spring project in eclipse. (File - Import - Existing Maven Projects). I see that,
1) The project is not imported as java project. i.e. if I right click on project and see the properties, I dont see options such as Java build path, Java Compiler etc.
2) I am looking for one particular class in the project, but it is not there, although I can see that class from terminal. Therefore it very much exists in the project. So why cant I see it in Eclipse ? Why is it not imported with the project ?
Please note that I use Eclipse_Juno and I can compile the project with maven on terminal and in eclipse.
There are a couple of things that could have gone wrong. Hard to say what happened.
If the project you have imported builds on the command line (mvn clean install) then chances are good it is importable into an IDE with not much trouble once the settings are ok.
Make sure you have the m2e (maven 2 eclipse) plugin available. So eclipse can detect its a maven project. If you also use spring I would give the Spring Tool Suite (STS) a try: http://spring.io/tools
If the project is not recognized as java - or the essential facets are not detected - I would try to figure out why. Maybe something in the preferences is not properly set up? (maven home, executables, sdk, ...)
I'm developing a web project using Eclipse Juno, Tomcat 7 and Maven 3 and have run into a strange problem.
I have a separate project where I compile some stuff and I pick that jar up in my web project as a dependency. So, the end result is one .war.
Now, when I run this war in embedded Tomcat in Eclipse and hit the refresh button on my browser, Tomcat says it cannot find a path in that jar.
In the workspace WEB-INF/lib folder I find the myApplication-common-widgetset-0.0.11-20130926.124257-7.jar
In the Tomcat Deployment directory under wtpwebapps/myApplication/WEB-INF/lib I see myApplication-common-widgetset-0.0.11-SNAPSHOT.jar
The strange thing is that the file under the Tomcat lib is 1kb large and the file in my workspace lib is ~22Mb.
I tried to copy the workspace jar to the Tomcat lib folder and everything works and run as a charm.
Updates:
When I run mvn tomcat:run from the command line in my workspace, everything works.
I "re-installed" both Eclipse (to Kepler, wiping everything, including workspace and home folders) and Tomcat 7. I still have the same issue.
Colleges tried fetching my project from SVN and ran it successfully, both with Eclipse and IntelliJ + Tomcat 7
What could have happened? Why is Eclipse embedded Tomcat not getting everything from the target directory?
The issue I think you're facing is the reality that eclipse does not strictly honour the maven dependencies.
This has to do with the fact that eclipse does not defer to maven when building, deploying and running on tomcat. Eclipse will use your local workspace setup and will thus sometimes introduce a dependency tree that is different from maven.
From the information you've supplied it appears as if that workspace lib file is the one sourced from a maven repository and the one in embedded tomcat deployment directory is a jar that eclipse has built - I'm guessing here.
If that jar is from a workspace project you can try closing the project and letting eclipse find the jar from maven.
This issue with Eclipse and Maven is rather nebulous and so is difficult to figure out exactly what is going on in terms of dependencies so sorry I can't be of more help
I made simple maven project and I opened it with Eclipse. I have installed maven plugin for Eclipse. I'm interested in following:
How Eclipse compiles code when I hit save on my source code (does it use configuration from ant or maven or something else)?
When I run tests from JUnit plugin for Eclipse those Eclipse calls mvn test (I suppose not, but what is then happening exactly)?
Is it possible that maven does the build successfully but Eclipse is
showing errors in code?
The Maven Integration for Eclipse makes it easier to edit POM files, allows you to execute maven builds from within Eclipse and to help with dependency management. It doesn't actually compile your code (unless of course you execute a maven build from within Eclipse). The main help is with the dependency management and writing the .classpath file of your project within Eclipse.
To try and answer your questions:
Eclipse uses its standard mechanism to compile code. With a standard eclipse for java developers your project will have a Java Project nature and Eclipse will then use the Java Development Tools - JDT to compile the code. (Internally this uses an incremental builder to build the code http://help.eclipse.org/juno/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Fguide%2FresAdv_builders.htm). What source files it will compile and where it will place the resultant .class files is configured in your project's Java Build Path (which I am guessing the maven plugin may well configure for you)
JUnit support is part of the Java Development Tools as well.
It is possible that maven will successfully build a project outside of Eclipse, but that the same project will show errors within Eclipse. This is usually down to classpath errors (dependencies defined in the project's POM not being added to the classpath in Eclipse). If you are using the maven plugin with eclipse this probably shouldn't happen. If you are not using the maven plugin within eclipse you can execute maven eclipse:eclipse to have maven update the Eclipse .classpath file of the project which should then fix any of these problems.
I upgraded to Eclipse Juno(for Java EE developers). I installed Maven Integration for Eclipse through marketplace.
Just to test, I created a web app using maven-archetype-webapp. I cannot run on server(There's no menu Run On Server). The same happens with another maven project which runs fine using Eclipse Indigo. A tried deleting .settings, .classpath, .project then re-importing the project but nothing. I was hoping so much on Juno!
Does anyone know a real solution to this problem?
May be Dynamic Web Module in Project Facet is not selected
Go to :- Project > Properties > Project Facets > check Dynamic Web Module
How about installing the m2e-wtp plugin and trying? You would want to confirm that the maven project is of war packaging as well.
Run on server is not a maven feature, it's a "classic eclipse" feature.
In order to run a maven project on a server you must adopt a plug-in (e.g a Jetty plug-in for your webapp) and the run the proper maven goal (e.g jetty-run).
Said this, you can run a web project on a server with (right-click) > Run as > Run on server if you have the proper runtime environment configured.
Enabling "Dynamic Web Module" in Project Facets may not help here in maven projects.
Because maven projects are structured differently (target/sampleApp-1.0-SNAPSHOT.war) than the normal Dynamic Web Projects (WebContent/).
So, If you use Dynamic Web Module manually, then eclipse will try to use "WebContent" directory structure as deployment directory for Application Server which won't be the case in maven projects.
Solution is to use m2e-wtp plugin to do the deployment.
If you installed m2e-wtp plugin, it'll automatically detect your maven project type & it'll show you the "Run as Server" option in "Run as" menu in "Project".
I have been trying to deploy a project that I created within eclipse but when I right click on the tomcat server and click "Add and Remove...", I got the message "There are no resources that can be added or removed from the server".
From what I understand it has something to do with the facets? I am not really sure to understand what is going wrong here.
Here is what I did for know:
I created a Maven project.
executed mvn eclipse:eclipse through the command line on the folder of the project
installed m2e
tried to add the project to the tomcat server
You probably want to use either mvn eclipse:eclipse OR m2e, but not both. m2e has gotten MUCH better in the last couple years, so that's what I would suggest.
Make sure you are using Eclipse for Java EE, otherwise you will need to install other plugins like WTP
Install m2e.
Install maven integration for wtp (from the eclipse marketplace)
make sure the artifact type for your project is war
Import Existing Maven Project in eclipse and browse to your pom to import the project.
It should give the correct facets to your project so it looks like a web project.