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.
Related
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.
I inherited a project that relies on Maven 2 to build it. Via project's Properties > Builders I can see that it has two builders, in this order:
Maven2_Builder
Maven Project Builder
I thought that there should be only one Maven builder...
Why two?
What the relation between the two?
Using the m2e plugin, I can clean the project at any given time via the project's context menu Run As > 6 Maven Clean. Does this mean Eclipse's Project > Clean... is no longer relevant?
Looks like you are using Eclipse with M2E. These days that works very well.
Before one would run
mvn eclipse:eclipse
Which would generate the typical Eclipse configuration files.
These days, just use the Eclipse Import as Maven Project and all necessary files are created.
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 have a couple of projects that I'm working on in Eclipse (or any IDE, so I don't want to depend on specific eclipse dependency maven capabilities). Some projects depend on other projects. Typically in Eclipse I would add the projects as references to other projects, but I'm not sure how to handle this when using Maven. In the deployment environment, there will be jars created and the maven build can pull the latest jars from the repository. Is there a way to reference another project's source code using maven while in the dev environment? For example...
I have this scenario:
Project A depends on B
I need to make a change to B and that will require an update to A. I don't want to make the change to B and check it in without checking in A since that will break A. And I would like to manage these dependencies through Maven -- any help would be appreciated.
thanks,
Jeff
The maven 2 eclipse plugin has 'workspace dependency resolution', where the dependencies are first looked up in the workspace, and then in the repository.
What I do is use SNAPSHOT version when doing my development. Project A depends on the latest SHAPSHOT version of Project B, so when I change Project B, I have Team City recompile and push out a new SHAPSHOT artifact to artifactory. Then I clean and compile project A to get the new Project B.
Can I make a single maven project that can be included as a dependency (to reference Java classes inside) and executed as a plugin?
I'm working on a library to help with hosting GWT on a LAMP stack. For someone to use this, they need to extend some Java classes (so it must be a dependency) and they need to invoke a maven plugin (so it needs to be a plugin). The plugin code references the same Java classes, so if they are seperate projects, the plugin one must depend on the library one.
As is, I have the library as a normal maven project, and the plugin as a maven plugin that depends on the library. This means that to do a release, I have to release two different artifacts, and the dependent project must update both version numbers for both artifacts. It'd be nice to have a single project.
You'd be better of by doing the following
project for the jar, Foo:Foo.jar
project that uses Foo:Foo.jar as a
dependency that builds the plugin
Maven parent project that
builds 1&2
The directory structure would look like this
\project\pom.xml
\project\foo\pom.xml
\project\foo\src\main\java\foo.java
\project\plugin\pom.xml
\project\plugin\src\main\resources
\project\plugin\src\main\java
From \project you can do a mvn clean package to build \project\foo\target\foo.jar and \project\plugin\target\plugin.jar
Hope this helps.
If you create a maven plugin it still has a artifactId/groupId/version. There's no reason it can't be references both in your section and in your section. On the other hand, if thats ugly, why not just make a library with the common code that both your main project and your maven plugin project depend on?
EDIT:
Sorry, wasn't clear on the second part. Look into composite maven projects, where there is a top level pom that defines a number of child modules. In this case, the maven plugin and the common library code could be separate children producing separate artifacts, but you only need one version number and one release command executed from the top level. I haven't done this but there are any number of open source projects that do. its often used as an idiom to put testing code into a single module that can be referenced by all the others, without having it go out in any distributable jar.
The best practice is to not do what you're suggesting. Examples of this include PMD, BND, JUnit/TestNG, and so on - no serious projects seem to package the maven plugin with the library proper.
One way to get both alternatives is to use maven assemblies to have two seperate maven projects for each the library proper and the plugin and then a separate packaging as a jar containing the classes from both.