I'm learning about Maven and I want to ask you why do I need to add the Spring Boot Maven plugin in the pom.xml if I want to run it?
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
But I don't need to add the install, deploy, compiler, clean and all other plugins. How does this plugins come in my project?
So I need to add this code in the pom.xml if I want to use this command: mvn spring-boot:run, but I don't need to add any code for these commands: mvn install:install, mvn compiler:compile, etc. I don't understand how. Thank you!
Compile, install, test, etc is part of the default maven lifecycle, specified in default-bindings.xml in your maven installation. This lifecycle configuration connects lifecycle stages (for instance compile) with plugins (maven-compiler-plugin), and is inherited by all your maven projects.
The spring-boot-maven-plugin on the other hand is not part of the any default lifecycle, and thus needs to be specified in each project.
Related
I have a maven project for which I'm running two separate builds.
In one build I want to save the build time by disabling the jar creation of maven modules in it.(There are 45 maven modules). There is a Maven-Jar-Plugin that is being used to create the jars.
I want to conditionally disable the jar creation at the command line, that is, looking for something similar to -Dskiptests used to skip the unit tests though there is a surefire plugin by default.
The maven-jar-plugin does not provide any skip option.
However, several ways are possible to achieve your requirement.
You may just skip the phase which brings by default (via default mappings) the jar creation, that is, the package phase, and as such simply invoke
mvn clean test
The additional phases would not make sense if you do not create a jar file anyway: package, install, deploy would not have anything to process. Moreover, the additional integration phases may also be impacted depending on your strategy for integration tests, if any.
Alternatively, you can configure your pom as following:
<properties>
<jar.creation>package</jar.creation>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.0</version>
<executions>
<execution>
<id>default-jar</id>
<phase>${jar.creation}</phase>
</execution>
</executions>
</plugin>
</plugins>
</build>
As such, the default behavior would still provide a jar creation, while executing maven as following:
mvn clean install -Djar.creation=false
Would instead skip the creation of the jar.
What we are actually doing:
We are re-defining the default execution of the maven-jar-plugin
We are overriding its execution id, as such getting more control over it
We are placing its execution phase binding to a configurable (via property) phase
Default phase (property value) keeps on being package
At command line time you can still change it to any value different than a standard maven phase. That is, -Djar.creation=none would also work.
I have a project with client and server components. Both have their own Maven multi-module build projects.
The correct server version must be referenced in various frontend modules. To accomplish this I set a property in my client parent POM like this:
<properties>
<server.version>1.2.3</server.version>
</properties>
Now I'd like to update the version number in the POM (i.e. not just injecting a different version from the command line with -D...) during/after a Jenkins build job. Is there a way to do this?
I found the com.google.code.maven-replacer-plugin:replacer Maven plugin which works perfectly for my case. It accepts an xpath and a regex to define what to replace in an XML file.
Example plugin configuration:
<plugin>
<groupId>com.google.code.maven-replacer-plugin</groupId>
<artifactId>replacer</artifactId>
<version>1.5.3</version>
<configuration>
<file>${project.basedir}/pom.xml</file>
<xpath>/project/properties/server.version/text()</xpath>
<token>^.*$</token>
<value>${newServerVersion}</value>
</configuration>
</plugin>
And the plugin can be run for each affected maven module:
mvn --non-recursive replacer:replace -DnewServerVersion=xxxx
At itembase we use Jenkins Pipeline Plugin. It comes with some useful built in functions like for example readMavenPom and writeMavenPom. So in your build pipeline you could do something like:
def pom = readMavenPom file: 'pom.xml'
//Do some manipulation
writeMavenPom model: pom
Did you check maven versions plugin?
(Tbe website is shutdown but the plugin page is still avaiable in google cache)
mvn -DnewVersion=<version> versions:set
When I run "mvn clean tomcat:run" (without specifying any tomcat version) command from command prompt for running my web application, it download tomcat 6.0.29 version dependency as shown below:
org/apache/tomcat/juli/6.0.29/juli-6.0.29.pom
org/apache/tomcat/annotations-api/6.0.29/annotations-api-6.0.29.pom
org/apache/tomcat/catalina-ha/6.0.29/catalina-ha-6.0.29.pom
org/apache/tomcat/coyote/6.0.29/coyote-6.0.29.pom
org/apache/tomcat/tribes/6.0.29/tribes-6.0.29.pom
org/apache/tomcat/jasper-el/6.0.29/jasper-el-6.0.29.pom
org/apache/tomcat/dbcp/6.0.29/dbcp-6.0.29.pom
pom.xml file of the application does not contain any tomcat version it require to run
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.0.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
<finalName>esa</finalName>
</build>
So my query is how does it decide to download particular this tomcat version dependency.
Probably the default settings of the tomcat plugin you run.
Try running mvn tomcat:help -Ddetails to see what version of the plugin you use, and how it can be configured.
I think it is an earlier version of the plugin, and you can now use explicit versions, such as
mvn org.apache.tomcat.maven:tomcat6-maven-plugin:2.0:run
mvn org.apache.tomcat.maven:tomcat7-maven-plugin:2.0:run
(or the shorter form)
Seems, you are running the tomcat-maven-plugin from codehaus, whihc has tomcat 6.0.29 built-in. (Seems there was no activity since 2010.)
You should try the tomcat7 plugin from apache.
Regards
Tibor
In command line for maven use --debug option to get explanation of build process. For our case output looks like:
...[DEBUG] Resolving plugin prefix tomcat from [org.apache.maven.plugins, org.codehaus.mojo]
...
[DEBUG] Resolved plugin version for org.codehaus.mojo:tomcat-maven-plugin to 1.1 from repository central (http://repo.maven.apache.org/maven2, releases)...
Actually to explain why we've got tomcat v1.1 without specifying anything about tomcat, remember that maven build process has been customized with build plugins. And each build plugins has own build plugins. So it is enough to examine effective pom file to get clear understanding that almost empty initial pom.xml has quite big effective pom.xml.
To overcome issue just use explicit version of the tomcat plugin.
My Maven project has a bunch of subprojects like this:
proj/
projEAR/
projCommon/
How can I compile and build the EAR project + deploy it to my web server at the same time?
The way I do it now is:
proj$ mvn clean install
[... builds everything ... ]
proj$ cd projEAR
projEAR$ mvn weblogic:deploy
[... deploys the EAR file ... ]
I'd like to do this with one command. Something like
proj$ mvn clean install projEAR/pom.xml weblogic:deploy
This fails of course, but I hope you get the idea...
Update:
The reason for all this is that jenkins only accepts one pom-file and command. So the problem is really how to configure Jenkins to run Maven twice.
How about the weblogic-deployer-plugin of Jenkins. It will deploy your ear file to a weblogic instance. See WebLogic Deployer Plugin.
Quick and easy workaround
As a workaround, I can advise you to use some Jenkin's Plugins, like "M2 Extra Steps". It allow you to perform extra actions pre or post one. They are often use after a build to perform stuff like generating doc, or deploying something.
I know this is working well ... because I often use this trick :)
Suggestion, never tried
At this moment, I don't have a straight answer. I don't really know how to do it in only one maven command. What I would try is to attach weblogic deploy phase to install.
ear submodule --> pom.xml
<build>
[...]
<plugins>
[...]
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>weblogic-maven-plugin</artifactId>
<version>2.9.1</version>
<executions>
<execution>
<configuration>
[...]
</configuration>
<goals>
<goal>install</goal>
</goals>
</execution>
</executions>
</plugin>
[...]
<plugins>
[...]
<build>
It should work, but once again, I never tried it.
Don't hesitate to give feed back
I couldn't get it to work with Maven. But the way I solved it (in Jenkins) was
Create a pre-build step in Jenkins with the command mvn clean install using the parent pom: proj/pom.xml
Configure the main build as weblogic:deploy using projEAR/pom.xml.
This results in two commands being run: First mvn clean install followed by mvn weblogic:deploy.
I have a Jenkins build which builds a maven project with -PmyProfile clean package. This works fine. Now I want the project be deployable but in a separate task (JBoss deployment) so it can be triggered explicitly via the jenkins GUI. For that, I have the following in my pom:
<profiles>
<profile>
<id>myProfile</id>
<properties>...</properties>
<build>
<plugins>
<plugin>
<groupId>org.jboss.as.plugins</groupId>
<artifactId>jboss-as-maven-plugin</artifactId>
<version>7.0.0.Final</version>
<configuration>
<hostname>localhost</hostname>
<port>29999</port>
<username>admin</username>
<password>admin</password>
<filename>${project.build.finalName}.war</filename>
<name>my-webapp</name>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
Now I only want to call that single deployment via mvn jboss-as:deploy separately. But how would I do that? If I create a second Jenkins project, everything needs to be built again, so that's pretty stupid. Building as a separate module does not work, either (some error with "building single modules not supported for maven 3").
Any ideas?
Thanks
It sucks a little, but you can always get stuff from another Jenkins workspace by using filesystem relative path like ../../SecondJob/workspace (or use symlink). I used to do this for the same case (deploying as separate job) for all my projects and it works, it's just not elegant, but I believe there's no built-in solution in Jenkins for that.
Alternatively, it seems there's Jenkins plugin for that, but I haven't used it and can't tell anything about it.
Possible trick:
Have only one project, but parameterize it with DEPLOY parameter set to FALSE by default. The build will contain your main build as well as an Invoke top-level Maven targets post-build step for deployment. The deployment step will be invoked only if DEPLOY is TRUE. To do that you use Conditional Build Step plugin.
There is a new deploy-only goal added in version 7.5.Final. You can grab the war from the first job with Copy Artifact Plugin.
References:
https://docs.jboss.org/jbossas/7/plugins/maven/latest/deploy-only-mojo.html
https://github.com/jbossas/jboss-as-maven-plugin/pull/56/commits