I'm running maven 3.6.0 on ubuntu 18.04.
My application’s pom.xml includes this dependency; the associated "neptus" jar is in my local .m2/repository:
<dependencies>
<dependency>
<groupId>pt.lsts.neptus</groupId>
<artifactId>neptus</artifactId>
<version>x.x</version>
</dependency>
My application actually does reference classes from the “neptus” jar file, so I want to include those classes in my project’s uberjar. Therefore the pom.xml also includes this, adapted from http://maven.apache.org/plugins/maven-shade-plugin/examples/includes-excludes.html
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.4</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<filters>
<filter>
<artifact>junit:junit</artifact>
<includes>
<include>junit/framework/**</include>
<include>org/junit/**</include>
</includes>
<excludes>
<exclude>org/junit/runners/**</exclude>
</excludes>
</filter>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
Yet the uberjar generated by 'mvn clean package' doesn’t contain any class files from the neptus artifact, and so my app throws java.lang.NoClassDefFoundError for those missing classes.
What am I doing wrong?
Thanks!
The maven-shade-plugin is ignored by default if that plugin is enclosed within a pluginManagement block, as it is in my case (sorry, not shown in my original post). The shade plugin does get executed if I do this:
% mvn package shade:shade
as described in this thread.
Related
I have tried oozie.launcher.mapreduce.job.user.classpath.first property in workflow.xml to load my jars first over sharelib jars.
Unable to run workflow when this property is used.
hadoop-hdfs is available in the provided jar and version is not incompatible
Maven relocation strategy can be used to avoid conflicting classes
http://maven.apache.org/plugins/maven-shade-plugin/examples/class-relocation.html
Posting pom.xml shaded plugin config which worked for me
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.1</version>
<executions>
<execution>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<relocations>
<relocation>
<pattern>org.apache.http</pattern>
<shadedPattern>shaded.org.apache.http</shadedPattern>
</relocation>
</relocations>
<shadedArtifactAttached>true</shadedArtifactAttached>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
I am trying to build an uber jar with maven-shade-plugin 2.1. I expect it to include all the classes in my jar and dependency jars. But I see that it does not include classes from dependency jars. What could I be doing wrong? Following is my usage of maven-shade-plugin in pom.xml. Could it be because finalName is same as project.artifactid?
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.1</version>
<configuration>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<minimizeJar>false</minimizeJar>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
</transformer>
</transformers>
<createDependencyReducedPom>false</createDependencyReducedPom>
<finalName>${project.artifactId}</finalName>
</configuration>
</execution>
</executions>
</plugin>
I tested your code and it works if it is inside <build> <plugins>, like this :
<build>
<plugins>
<plugin>
<!-- your code here -->
</plugin>
</plugins>
</build>
All dependencies are correctly included in the final jar. Also, make sure the dependencies you want to include in the shaded jar are inside the <dependencies> element, not the <dependencyManagement> element.
Is there a maven plugin to create a runnable jar which extract all used classes from the dependent libraries?
The main reason I need this is the following: I developed a Java Web Start Application and if I creat the jar with shade plugin or jar plugin the JAR will be >13MB or the shade-plugin even forgets some classes which results in ClassNotFoundException.
With my old ant script the JAR is only 1,3MB small, it contains all required classes and it is downloaded and started really fast. But to go with technology I would like to switch to maven.
Thanks a lot!
My current pom:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<minimizeJar>true</minimizeJar>
<shadedClassifierName>min</shadedClassifierName>
<shadedArtifactAttached>true</shadedArtifactAttached>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
What do I need to add for example the apache chemistry opencmis libraries (now the classes will be extracted but as I said some classes are still missing which opencmis uses itselfe)?
Please have a look at this question and the suggested workaround - referencing the needed classes to avoid the exclusion by the minimizeJar option.
In my project's pom.xml I have the following dependency:
<dependency>
<groupId>com.my.library</groupId>
<artifactId>MyLib</artifactId>
<version>1.0</version>
<type>jar</type>
</dependency>
<dependency>
...
</dependency>
I would like to have my project's final built jar including the classes of above com.my.library:MyLib dependency, so I used maven-shade-plugin in the following way:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<filters>
<filter>
<artifact>com.my.library:MyLib</artifact>
<includes>
<include>com/my/library/**</include>
</includes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
Then, I run mvn clean install , my project was built successfully.
But when I check the content of MyProject.jar under target/ directory, it doesn't contain classes from com.my.library:MyLib dependency ,why? Where am I wrong with maven-shade-plugin ?
Define an <artifactSet>:
<artifactSet>
<includes>
<include>com.my.library:MyLib</include>
</includes>
</artifactSet>
And try removing the <artifact/> from the <filters/>. This should do it.
change pattern to
<includes>
<include>com/my/library/**.class</include>
</includes>
I'm using the Maven Shade Plugin to include all dependencies during package phase.
That works fine for classes, but dependent resources aren't included.
Here's the layout of the dependent jar:
./config.properties <-- this is the missing resource
./META-INF
./META-INF/MANIFEST.MF
./META-INF/maven
./META-INF/maven/com.example
./META-INF/maven/com.example/bar
./META-INF/maven/com.example/bar/pom.properties
./META-INF/maven/com.example/bar/pom.xml
Here's the shade plugin configuration:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>1.6</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<manifestEntries>
<Main-Class>com.example.foo.Foo</Main-Class>
<!-- <X-Compile-Source-JDK>${maven.compile.source}</X-Compile-Source-JDK>.
<X-Compile-Target-JDK>${maven.compile.target}</X-Compile-Target-JDK> -->
</manifestEntries>
</transformer>
</transformers>
<filters>
<filter>
<!--
Exclude files that sign a jar
(one or multiple of the dependencies).
One may not repack a signed jar without
this, or you will get a
SecurityException at program start.
-->
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.RSA</exclude>
<exclude>META-INF/*.INF</exclude> <!-- This one may not be required -->
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
It's embarrasing, but there was a typo in the version of the dependency and that version didn't have the file.