My Source code: 2 different branches from same repository. Both have 80% same code. Packages also same. But 20% classes are different in both branches. Its because of different features being developed in these branches.
My Intellij version is 2018.2.7 Community Edition
I cloned the repository in 2 different folders.
consider first one: C:\SourceCode\myRepo and move to branch1 from master
consider second one: C:\SourceCode\SecondCopy\myRepo and move to branch2 from master
Now I create 2 different projects in IntelliJ. One from C:\SourceCode\myRepo, Second from C:\SourceCode\SecondCopy\myRepo.
I build first project using git bash for windows using simple 'mvn clean install' command. (outside Intellij). Open Intellij. Run the application on Jetty. It goes good.
I have the second IntelliJ Project open as well in new Window. Now I build this second project in git bash using 'mvn clean install'(again outside Intellij). But as soon as I do that, the first project starts showing exceptions in code for the java classes which are not present in second project.
Even the application which was Already running using 'Run configuration of Intellij' in Jetty in First project, starts throwing class not found errors.
How can I resolve it and work on 2 projects having slightly different code but 80% same code, same packages etc. parallelly? What am I missing here? My intention is not to run Jetty parallelly. But to be able to compile these 2 projects independently and be able to Run Jetty in any one project anytime without interfering with other project.
These projects are big projects and hence, I want to initiate build and run for one project. Till the time its up and running, I want to be able to work on the other one parallelly in a way that, this work after compiling/auto building in this project doesn't impact the other one where I just started the application.
It is killing my productivity. Please help!
Use different Maven coordinates for the projects.
Someone told me that... Its happening because I am using maven and after building, maven keeps the project libraries that it builds in local repository. So both the projects after building are trying to keep the jars in the same folder from where Jetty is reading as well. Hence there is interference.
I have not tried. but If I keep 2 separate local repositories for both the projects, it should solve, but with this all the dependencies will also be unnecessarily duplicated. So the solution is as mentioned by #Andrey is that I keep the maven coordinates separate for both the projects, so that 2 separate jars are created for both. Thanks Andrey. I wont necessarily change maven coordinates for the all modules but for one where there is difference of code in both the projects. Hope this answer helps someone.
Related
I am building an eclipse plug-in project that acts as a front end. I also have a separate eclipse project that runs as a backend. Right now I can run each of them separately and they communicate just fine using sockets.
I would like the plug-in to create the major components of the back end when it starts but also keep the two projects separate so that I can use other editors to communicate with the back end. So, I added the back end eclipse project to the build properties of the plug-in project and I added some code from the back end driver to the plug-in activator's start(). However, when I run the plug-in project I am getting class not found exceptions for all back end references. It appears to compile fine, but I can't run it. I do not do anything to the MANIFEST.MF file in the plug-in project.
How does one add a second java project to an eclipse plug-in project?
There are several ways you can do this, going from best and most difficult to worst and easiest:
(1) Use a build tool (such as the built-in ANT, or tycho, or (as I'm sure there are) some other). This is by far the best solution, but is quite a bit more involved than the next 2.
(2) Convert your non-plugin project to a plugin project and add it as a plugin dependency in your plugin settings file's dependencies tab
(3) Export your non-plugin to a new .jar in your plugin project directory (e.g. $project_loc/lib/something.jar); go into plugin settings (plugin.xml) and include it in: The Build tab under binary build, and the Runtime tab under Classpath. (Or edit the corresponding entries in manifest.mf and build.properties)
For most cases I'd recommend approach (1); look up a few tutorials online, there are plenty. (3) is the quick-and-dirty non-flexible workaround to your particular situation, good for nothing other than seeing if it actually can run. (2) is somewhere in between -- obviously not ideal, but not as bad as 3.
I have 2 builds of the same project on the same Hudson/Jenkins server (they are running different build profiles). The both build when polling SCM, but I sometimes get the following error:
The plugin 'org.apache.maven.plugins:maven-checkstyle-plugin' does not exist or no valid version could be found
This only started once I added the second build, so I'm assuming there is some sort of conflict. Does anyone know what's going on here?
thanks,
Jeff
Are your builds running at the same time, with the same Maven instance and the same local Maven repository? If so, then maybe you run into a filelock on that plugin jar. I have the same problem here, if two jobs are accessing the same Maven artifact at the same time, they fail, because Maven can't handle that.
I solved that with two Maven instances, with a separate local repository.
It could also help, if you set the VCS polling of the second job a minute after the first job.
I have a project which has 20 different projects this was build using ant.now i want to move it to maven build.I have created jars for all the 20 projects + 1 main project.I need to build this main project to get the app running.I am working with NetBeans 6.7.1.How am i going to integrate this project and deploy it?Please help !
In maven, you can either create a multi-module project or add the other projects as dependencies.
I prefer the first approach, because it lets you build everything in one run (and that's exactly the reason why others prefer the second version, because they want their projects to be independent of each other).
Either way, run mvn deploy or use the maven-release-plugin on the individual projects or the root project of a multi-module project.
I have 2 completely separate projects where one depends on the other. I've very recently mavenized the main project but can mavenise the dependency if absolutely necessary.
Originally these were Netbeans projects, with the main project having several modules. What I liked is that I could declare the dependency as a dependent project. This allowed me to use the most recent code as it changes a lot (the project is in its infancy). NetBeans would put the dependent project on the classpath when running, and build a jar in the /dist directory when doing a clean and build.
Now that the main project is in maven, I can't do this anymore. The only alternative I've found was to manually copy it into the project repository, but that removes a lot of automation and ease of use. Every time I wanted to test a change I would have to rebuild the dependency, move it to the buried project repository folder, rename it appropiatly, switch back to NetBeans, then run. This is vs clicking run and everything being done automatically.
Maybe I'm just lazy, but is there an easy way to do this?
I have 2 completely separate projects where one depends on the other. I've very recently mavenized the main project but can mavenize the dependency if absolutely necessary.
Mavenizing the dependent project would help a lot. Like Eclipse or IntelliJ, NetBeans supports something Eclipse calls Workspace dependency resolution: if a project A depends on a project B and you open both of them in your IDE, A can be configured to depend on B sources instead of B jar (and any change would become immediately visible).
mavenizing the depedency project is the best option.
Alternatively you might get away with using a system scope dependency which points to the dependency project's dist/ folder jar artifact.
I recently started to use Maven2 in one of my Java web application projects. Now I had many issues with it, some times project fails to build for no apparent reason and then it suddenly starts to work when nothing was done at all to project. Or some times our project members must delete project from their harddrive and download project again from SVN. There seems to be many very odd bugs in Maven in eclipse, but there some issues I would like know if it is possible to solve this issues.
1) I have understood that Maven2 should be able to get dependencies for added jars, but when I add a new dependency in Eclipse, it fails when I build it, it says dependecies are missing. How can I make maven to download those missing dependecies automatically?
2) I have Tuckey UrlRewrite Filter in use, but public repositories have only old version of this dependecy, so when I use this old version (3.1 when I need 3.2). How can I include this to project? We have many programmers in this project, so setting up local repository would mean that all our programmers would have to install that local repository.
Now I had many issues with it, some times project fails to build for no apparent reason and then it suddenly starts to work when nothing was done at all to project. (...)
Ok and what is the point of this free rant? I use Maven and my builds are 100% reproducible, there are well known practices to follow to achieve this. Maybe you're just not following them. Anyway if you're not happy with it, what can I say, don't use it.
I have understood that Maven2 should be able to get dependencies for added jars, but when I add a new dependency in Eclipse, it fails when I build it, it says dependencies are missing. How can I make maven to download those missing dependencies automatically?
I think you misunderstood, Eclipse won't guess what Maven coordinates to add if you don't provide the required informations for them. Dependencies must be declared in the POM, either by editing the POM manually or by using m2eclipse wizards.
And if this is what you did (and if I misunderstood the question) then please provide the <dependency> declaration and the exact error trace.
I have Tuckey UrlRewrite Filter in use, but public repositories have only old version of this dependecy, so when I use this old version (3.1 when I need 3.2). How can I include this to project? We have many programmers in this project, so setting up local repository would mean that all our programmers would have to install that local repository.
This question has already been asked several times, see for example Maven, how to add additional libs not available in repo where I suggest two possible solutions (use a corporate repository like Nexus or a "file-based" repository, the former suggestion being the preferred one for a long term solution).