How do I make a Maven module not export a jar? - maven-2

I have a Maven build with three modules.
Module A exports a jar.
Module B depends on A and exports a jar.
Module C is a set of regression tests that depend on A and B.
The reason the regression tests aren't just part of module B is that they should be able to run against multiple versions of A and B to ensure backwards compatibility. I want to be able to run deploy from the top level build to create A.jar and B.jar, but not C.jar. Is this possible?

<properties>
<maven.deploy.skip>true</maven.deploy.skip>
</properties>
If you don't need to create a JAR at all, you might want to add two more properties:
<jar.skipIfEmpty>true</jar.skipIfEmpty>
<maven.install.skip>true</maven.install.skip>
Note that you still need maven.deploy.skip, otherwise the build will fail during deployment.

The maven deploy plugin includes a skip options that prevents artifact deployment.
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
You can try adding that to project C.

Use below for module C:
<packaging>pom</packaging>

Use a packaging of type pom for C and rebind all required plugins:
<project>
...
<packaging>pom</packaging>
...
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<executions>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<executions>
<execution>
<id>process-test-resources</id>
<phase>process-test-resources</phase>
<goals>
<goal>testResources</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<executions>
<execution>
<id>test</id>
<phase>test</phase>
<goals>
<goal>test</goal>
</goals>
</execution>
</executions>
</plugin>
...
</plugins>
...
</build>
...
</project>

Related

Not able to generate client code with wsdl2java and maven using CXF

I'm using maven cxf-codegen-plugin to generate client files from wsdl but not able to do so.
I want that all the wsdl files in the folder src/main/wsdl should be scanned and corresponding clients should be generated in separate folders. Please help.
My pom.xml is :
<build>
<finalName>someFileName</finalName>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-codegen-plugin</artifactId>
<version>2.2.3</version>
<executions>
<execution>
<id>generate-sources</id>
<phase>process-resources</phase>
<configuration>
<sourceRoot>src/main/java</sourceRoot>
<wsdlRoot>${basedir}/src/main/wsdl</wsdlRoot>
</configuration>
<goals>
<goal>wsdl2java</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
here's how I'm doing it with version 2.7.4, and having the generated code created in different packages :
<build>
<plugins>
<plugin>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-codegen-plugin</artifactId>
<version>${cxf.version}</version>
<executions>
<execution>
<id>generate-sources</id>
<phase>generate-sources</phase>
<configuration>
<sourceRoot>${project.build.directory}/generated/src/main/java</sourceRoot>
<wsdlOptions>
<wsdlOption>
<wsdl>${basedir}/src/main/wsdl/MyWsdl1.wsdl</wsdl>
<extraargs>
<extraarg>-client</extraarg>
<extraarg>-verbose</extraarg>
<extraarg>-p</extraarg>
<extraarg>urn:mycompany:myproduct1:v1_0=com.my.project.product1</extraarg>
<extraarg>-p</extraarg>
<extraarg>http://www.w3.org/2001/XMLSchema=com.my.project.common</extraarg>
</extraargs>
</wsdlOption>
<wsdlOption>
<wsdl>${basedir}/src/main/wsdl/MyWsdl2.wsdl</wsdl>
<extraargs>
<extraarg>-client</extraarg>
<extraarg>-verbose</extraarg>
<extraarg>-p</extraarg>
<extraarg>urn:mycompany:myproduct2:v1_0=com.my.project.product2</extraarg>
<extraarg>-p</extraarg>
<extraarg>http://www.w3.org/2001/XMLSchema=com.my.project.common</extraarg>
</extraargs>
</wsdlOption>
</wsdlOptions>
</configuration>
<goals>
<goal>wsdl2java</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
Here's where you can find out more about the extra-args :
http://cxf.apache.org/docs/wsdl-to-java.html
For an automatic scan of the wsdl folder, this works good too :
<configuration>
<sourceRoot>${project.build.directory}/generated/src/main/java</sourceRoot>
<wsdlRoot>${basedir}/src/main/wsdl</wsdlRoot>
<includes>
<include>**/*.wsdl</include>
</includes>
</configuration>
Hope it helps!
I realize this is an old question, but I just ran into this, so I wanted to reply for the benefit of others. You are right on commenting out the <pluginManagement> tag see here. However for the error in Eclipse that says:
Plugin execution not covered by lifecycle configuration
You will need to install the m2e connector for build-helper-maven-plugin (click on the error, and Eclipse should guide you to install it)
I put plugins tag inside pluginManagement tag and error disappeared:
<pluginManagement>
<plugins>
<plugin>
..........................
</plugin>
</plugins>
</pluginManagement>

Maven: add a folder or jar file into current classpath

I am using maven-compile plugin to compile classes. Now I would like to add one jar file into the current classpath. That file stays in another location (let's say c:/jars/abc.jar . I prefer to leave this file here). How can I do that?
If I use classpath in the argument:
<configuration>
<compilerArguments>
<classpath>c:/jars/abc.jar</classpath>
</compilerArguments>
</configuration>
it will not work because it will override the current classpath (that includes all the dependencies)
This might have been asked before. See Can I add jars to maven 2 build classpath without installing them?
In a nutshell: include your jar as dependency with system scope. This requires specifying the absolute path to the jar.
See also http://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html
The classpath setting of the compiler plugin are two args. Changed it like this and it worked for me:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<compilerArgs>
<arg>-cp</arg>
<arg>${cp}:${basedir}/lib/bad.jar</arg>
</compilerArgs>
</configuration>
</plugin>
I used the gmavenplus-plugin to read the path and create the property 'cp':
<plugin>
<!--
Use Groovy to read classpath and store into
file named value of property <cpfile>
In second step use Groovy to read the contents of
the file into a new property named <cp>
In the compiler plugin this is used to create a
valid classpath
-->
<groupId>org.codehaus.gmavenplus</groupId>
<artifactId>gmavenplus-plugin</artifactId>
<version>1.12.0</version>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<!-- any version of Groovy \>= 1.5.0 should work here -->
<version>3.0.6</version>
<type>pom</type>
<scope>runtime</scope>
</dependency>
</dependencies>
<executions>
<execution>
<id>read-classpath</id>
<phase>validate</phase>
<goals>
<goal>execute</goal>
</goals>
</execution>
</executions>
<configuration>
<scripts>
<script><![CDATA[
def file = new File(project.properties.cpfile)
/* create a new property named 'cp'*/
project.properties.cp = file.getText()
println '<<< Retrieving classpath into new property named <cp> >>>'
println 'cp = ' + project.properties.cp
]]></script>
</scripts>
</configuration>
</plugin>
From docs and example it is not clear that classpath manipulation is not allowed.
<configuration>
<compilerArgs>
<arg>classpath=${basedir}/lib/bad.jar</arg>
</compilerArgs>
</configuration>
But see Java docs (also https://www.cis.upenn.edu/~bcpierce/courses/629/jdkdocs/tooldocs/solaris/javac.html)
-classpath path Specifies the path javac uses to look up classes needed to run javac or being referenced by other classes you are
compiling. Overrides the default or the CLASSPATH environment variable
if it is set.
Maybe it is possible to get current classpath and extend it,
see in maven, how output the classpath being used?
<properties>
<cpfile>cp.txt</cpfile>
</properties>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.9</version>
<executions>
<execution>
<id>build-classpath</id>
<phase>generate-sources</phase>
<goals>
<goal>build-classpath</goal>
</goals>
<configuration>
<outputFile>${cpfile}</outputFile>
</configuration>
</execution>
</executions>
</plugin>
Read file (Read a file into a Maven property)
<plugin>
<groupId>org.codehaus.gmaven</groupId>
<artifactId>gmaven-plugin</artifactId>
<version>1.4</version>
<executions>
<execution>
<phase>generate-resources</phase>
<goals>
<goal>execute</goal>
</goals>
<configuration>
<source>
def file = new File(project.properties.cpfile)
project.properties.cp = file.getText()
</source>
</configuration>
</execution>
</executions>
</plugin>
and finally
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<compilerArgs>
<arg>classpath=${cp}:${basedir}/lib/bad.jar</arg>
</compilerArgs>
</configuration>
</plugin>
We mixed two of the answers found here to solve a similar problem. Our project needs a JAR only in compile stage, but add a local dependency, using system scope, it is unuseful because Maven refuse the artifact publication with an error related to a missing dependency.
The snippets used are the following:
<properties>
<classpathfile>${basedir}/classpathfile.classpath</classpathfile>
</properties>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.9</version>
<executions>
<execution>
<id>build-classpath</id>
<phase>generate-sources</phase>
<goals>
<goal>build-classpath</goal>
</goals>
<configuration>
<outputFile>${classpathfile}</outputFile>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.gmaven</groupId>
<artifactId>gmaven-plugin</artifactId>
<version>1.4</version>
<executions>
<execution>
<phase>generate-resources</phase>
<goals>
<goal>execute</goal>
</goals>
<configuration>
<source>
def file = new File(project.properties.classpathfile)
project.properties.originalClassPath = file.getText()
</source>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<compilerArgs>
<arg>-cp</arg>
<arg>${originalClassPath}${path.separator}${basedir}/../../../bin/POM_RUNTIME_PLACEHOLDER/ExtraJar.jar</arg>
</compilerArgs>
</configuration>
</plugin>
Maven is able to compile and successfully deploy the artifacts.
If anyone is interested the full POM is available in GitHub under project NuReflector, defaultPOM.template under src/NuReflector.

Share test resources between maven projects

There is a clear solution for sharing the common test code between maven projects using test-jar goal of maven-jar-plugin plugin (see here).
I need to do the similar thing with test resources, in particular, I want test resources of project A be available in the classpath of project B during testing.
For project A one need to declare:
<!-- Package and attach test resources to the list of artifacts: -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>run</goal>
</goals>
<configuration>
<tasks>
<jar destfile="${project.build.directory}/test-resources.jar">
<fileset dir="${project.basedir}/test-resources" />
</jar>
</tasks>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>attach-artifact</goal>
</goals>
<configuration>
<artifacts>
<artifact>
<file>${project.build.directory}/test-resources.jar</file>
<type>jar</type>
<classifier>test-resources</classifier>
</artifact>
</artifacts>
</configuration>
</execution>
</executions>
</plugin>
And in project B it will be normal dependency:
<dependency>
<groupId>myproject.groupId</groupId>
<artifactId>myartifact</artifactId>
<version>1.0-SNAPSHOT</version>
<classifier>test-resources</classifier>
<scope>test</scope>
</dependency>
Question: Should it work in all cases? Is it possible to pack resources without maven-antrun-plugin (using more 'lightweight' plugin)?
Just use jar:test-jar and declare the resulting JAR as a dependency (refer to this guide for more details). And while I don't understand the problem of having resources and classes in this jar, you can always exclude all .class files:
<project>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.2</version>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
</execution>
</executions>
<configuration>
<excludes>
<exclude>**/*.class</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
And to use it:
<project>
...
<dependencies>
<dependency>
<groupId>com.myco.app</groupId>
<artifactId>foo</artifactId>
<version>1.0-SNAPSHOT</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
</dependencies>
...
</project>
Accepted answer helped me, but it's not quite accurate in case you need regular jar of same project as well. It will delete *.class files from both jars.
Settings below translates to something like:
create me 2 jars: 1 regular, 1 test;
remove *.class files, but only from test jar
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
<configuration>
<excludes>
<exclude>**/*.class</exclude>
</excludes>
</configuration>
</execution>
</executions>
</plugin>
Using maven-dependency-plugin we can put the resource needed in the right directory, only modifying the pom on dependent project is needed:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<phase>generate-test-resources</phase>
<goals>
<goal>unpack</goal>
</goals>
<configuration>
<artifactItems>
<artifactItem>
<groupId>dependeeGroupId</groupId>
<artifactId>dependeeArtifactId</artifactId>
<version>dependeeVersion</version>
<type>test-jar</type>
<outputDirectory>${project.build.directory}/test-classes</outputDirectory>
<includes>resourceNeeded.txt</includes>
<overWrite>true</overWrite>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
type is used to get test resource
outputDirectory is used to put the resource usable in tests
Documentation here: https://maven.apache.org/plugins/maven-dependency-plugin/unpack-mojo.html
There is already a goal to build a test jar from maven.
Assuming you need something a little more flexible, you can use the jar plugin to package your test resources and run that goal with the main package goal with something like this.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>jar</goal>
</goals>
<configuration>
<classifier>test-resources</classifier>
<includes>
<include>**/*.whatever-you-want</include>
</includes>
</configuration>
</execution>
</executions>
</plugin>
Whatever you want bundled would be added to the project-name-version-test-resources.jar when the jar goal is run.
You could then include it in a project via the same dependency you use above.

Maven write to stdout

Anyone familiar with a way how can I can i write something to the stdout from maven.
For instance i would like to write a line everytime i start a new module.
I would use the Maven AntRun plugin to echo the message and bind it on the validate phase (the first phase) of the default lifecyle in the parent pom:
<project>
...
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.3</version>
<executions>
<execution>
<id>entering-module</id>
<phase>validate</phase>
<configuration>
<tasks>
<echo>Entering module: ${pom.artifactId}</echo>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
This is just an example of course, the message I'm writing here doesn't really add value to what Maven is already providing/doing.

How to declare a before and after execution of a maven plugin around another plugin execution?

I would like to create an execution order in my plugin which surrounds a maven plugin with a before and after execution of another maven plugin. All 3 executions are part of the deploy phase.
Here is an example of what I want to do:
phase:deploy
url:get: execution-before
dependency:unpack
url:get: execution-after
Note: url:get is my own custo mojo and just executes an http get using commons httpClient.
I would usually attach the after plugin execution in the next phase but unfortunately deploy is the last phase of the jar lifecycle.
Thank you in advance,
Kostas
Note: The following plugins segment from my pom file creates the following execution order which is not expected:
phase:deploy
url:get: execution-before
url:get: execution-after
dependency:unpack
Plugin segment:
<plugin>
<groupId>com.blabla.stpadmin</groupId>
<artifactId>maven-url-plugin</artifactId>
<version>1.0-SNAPSHOT</version>
<executions>
<execution>
<id>stop-stpadmin-service</id>
<phase>deploy</phase>
<goals>
<goal>get</goal>
</goals>
<configuration>
...
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>unpack</id>
<phase>deploy</phase>
<goals>
<goal>unpack</goal>
</goals>
<configuration>
...
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.blabla.stpadmin</groupId>
<artifactId>maven-url-plugin</artifactId>
<version>1.0-SNAPSHOT</version>
<executions>
<execution>
<id>start-stpadmin-service</id>
<phase>deploy</phase>
<goals>
<goal>get</goal>
</goals>
<configuration>
...
</configuration>
</execution>
</executions>
</plugin>
You can bind the execution of each plugin to the same phase and they will be executed in the order you specify. Note they will be executed after the deploy goal has run, so you might want to bind them to the previous phase (install)
Update: to ensure the execution-before and execution-after goals are executed around the dependency plugin execution, you'll need to ensure they are defined in separate plugins. Otherwise the two configurations will be merged and executed sequentially.
If the two executions need to be defined in the same plugin, you can do this by defining a custom lifecycle and invoking that lifecycle before your Mojo is executed via the execute annotation. In this answer I described how to create a custom lifecycle and force it to be invoked before a plugin is run. If you configure the execute-after goal to invoke the dependency-plugin you'll get the execution order you want (you could even invoke the execute-before goal in that lifecycle as well).
The example below will execute the three plugins in order during the deploy phase:
<plugin>
<groupId>custom.url.plugin</groupId>
<artifactId>maven-url-plugin</artifactId>
<version>1.0</version>
<executions>
<execution>
<phase>deploy</phase>
<goals>
<goal>execution-before</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>deploy</phase>
<goals>
<goal>unpack</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>custom.url.plugin</groupId>
<!--specify final execution in a different plugin to
avoid the configurations being merged-->
<artifactId>maven-url-2-plugin</artifactId>
<version>1.0</version>
<executions>
<execution>
<phase>deploy</phase>
<goals>
<goal>execution-after</goal>
</goals>
</execution>
</executions>
</plugin>