I created a simple Maven project (Packaging type - Jar) that has dependencies on Spring and My Sql library (mysql-connector). When I package this project with $mvn package I do get a jar file after successful execution of this command.
I was also trying to include all the dependencies in the output jar file, so I added a 'jar-with-dependencies' assembly descriptor, but as the documentation says:
The `jar-with-dependencies` descriptor builds a JAR archive with the contents of the main project jar along with the unpacked contents of all the project’s runtime dependencies.
I want to include the dependencies in JAR form, not the unpacked way. How can I do this?
Java cannot load classes from jars in your jar out of the box. You must configure it with project like one-jar and maven plugin.
Maybe this can help Maven Shade Plugin:Maven Excecutable Jar
Olivier
Vicky is trying to aggregate the jars and this is known as "building-an-aggregate-jar" in Maven's terms. You can find more in Robert's[1] and Artifact Technical Notes'[2] blog.
One discussion[3] that can help as well.
Regards
[1] http://rombertw.wordpress.com/2010/05/14/maven-recipe-building-an-aggregate-jar/
[2] http://blog.artifact-software.com/tech/?p=121
[3] http://maven.40175.n5.nabble.com/Aggregate-POM-for-thirdparty-package-dependencies-not-downloaded-td113927.html
Related
Is it possible to convert project .classpath file to pom.xml after converting a simple web application project to maven project? Because if my project uses many jars and I want to convert it to maven then I will do configure->convert to maven but then it is not possible to add all the jars dependencies in pom.xml manually. So is there any tool to convert this.
First there is no tool to do such things. The problem is usually that you have a larger number of dependencies which you don't need to put into the pom.xml file, cause Maven handles transitive dependencies which means you only need to add only direct dependencies. The best thing is to look at the current projects jar files and try to find them in Maven Central and cut&paste the information form the search output into your pom. And of course test the build via Maven on command line.
I'm developping application with JOGL2 and my favorite IDE Eclipse, also I want to use Maven2 for this purpose. Unfortunately, JOGL2 has no artifact yet. Also, I plan to deploy it as a runnable jar file.
So I want to install JOGL artifact locally : so i'll use the install:install-file command.
But I want to group several jars to make several artifacts, that is :
gluegen-rt.jar and jogl.all.jar as a single artifact named jogl.core
gluegen-rt-natives-linux-i586.jar and jogl.all-natives-linux-i586.jar as a single jar named jogl-natives-linux-i586
and so on
Is it possible ? (The official documentation does not mention the possibility or unpossibility to do so).
Thanks in advance
Install all files as usual like file:jar:version. Than create pom with pom packaging and use gluegen-rt.jar and jogl.all.jar as dependencies in it (they must be already installed). After that use new pom as dependency in your project.
maven doesn't have support for that. You would have to unpack these JAR files and repackage them together.
maven does have support for merging JAR with dependencies (http://stackoverflow.com/questions/574594) - and it's done the way I mentioned above. But you are asking about merging two arbitrary JARs, which is not possible in maven.
In my RAD, when I open up the MANIFEST.MF file for an ejb project, because I need to add dependencies, in the UI, I see (under dependencies):
Select other JARs or modules contained by the EAR that are required by this JAR or module. Only valid or existing dependencies are shown.
What does it mean by Only valid or existing dependencies. I say this because not all projects in the workspace are listed under Dependencies. And the project that I need to add as dependency is not listed here. What is the reason for this?
I found the solution although do not understand the reason. I need to add the project jar under JAVA EE Module Dependencies
How to convert a Ant project to Maven project? A sample project that would link (a Wicket project)
Thanks
The nice part of using maven is that most standard stuff works automatically once you do things the maven way. For a simple webapp:
Create a pom with groupId, artifactId and version (packaging: war)
Add the required dependencies to the pom
move the
java sources to src/main/java,
resources to src/main/resources,
webapp content to src/main/webapp,
test content to src/test/java and src/test/resources
set the compiler compliance version using the maven compiler plugin
That should get you up 'n' running.
http://www.sonatype.com/people/2009/04/how-to-convert-from-ant-to-maven-in-5-minutes/
I don't know what your ant script looks like, but assuming its a basic script for building, you will need to create a pom.xml file for your project, add your dependencies, and then build it via maven.
For anyone who lands here in future, there is an easier way to find dependencies for maven using the file hashes. So, you won't have to guess artifact versions.
As per the below article, the idea is to generate a SHA1 checksum of the dependency that you want to find the information, then do a reverse search in Nexus repository manager using that hash. For the checksum generation, you can use Microsoft's FCIV (free) utility.
https://devreads.xyz/ant-to-maven-conversion-the-painless-method/
Hi i am studying Spring In Action 2.0 and i am new to maven.
I am walking through the chapters and codes but i i got following error when i imported project through pom.xml on the pom editor in eclipse.
6/21/09 3:19:42 AM CDT: Missing
indirectly referenced artifact
incubator-activemq:activeio-core:jar:3.0-beta3:compile
6/21/09 3:19:42 AM CDT: Missing
indirectly referenced artifact
incubator-activemq:activemq-core:jar:4.0:compile
I downloaded the jar file and added to the library. still it does not work.
I am stuck what to do next? Can anyone help me with this?
Thanks in advance.
The referenced jars aren't available on the Maven2 central repository, so unless you have an additional repository declaration in your POM or an active profile in your settings, Maven will not know where to obtain the artifacts from.
There are a few public repositories like here and here hosting these artifacts.
To use these repositories you could add the relevant repository declaration to your POM or settings. See here for an example configuration.
Alternatively if you don't trust the repositories you could manually download the jars and put them into your local Maven repository, though you'd need to be careful to replicate the structure Maven expects, and you may well encounter the same problem for different jars.
Another alternative is to use a Maven repository manager like Nexus or Artifactory, to manage Maven's interactions with external repositories, though that is almost certainly too much information if you're just starting out.
For general help/information on Maven, check out the Maven book.