I am trying to solve this for about a week now so I'll be very grateful for any help.
I am developing an Eclipse plugin. I need to read the pom.xml file in my code. To do this I need three maven dependencies.
The project was created as plugin project and then converted to Maven project using m2eclipse. This is my POM:
<properties>
<tycho-version>0.25.0</tycho-version>
<manifest-location>META-INF</manifest-location>
<name>${project.name}</name>
<version>${project.version}</version>
</properties>
<repositories>
<repository>
<id>eclipse-mars</id>
<layout>p2</layout>
<url>http://download.eclipse.org/releases/mars</url>
</repository>
</repositories>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-model</artifactId>
<version>3.3.9</version>
</dependency>
<dependency>
<groupId>org.codehaus.plexus</groupId>
<artifactId>plexus-utils</artifactId>
<version>3.0.22</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-core</artifactId>
<version>3.3.9</version>
</dependency>
</dependencies>
</project>
Now when I run new Eclipse app to test the plugin. It throws an exception: ava.lang.NoClassDefFoundError: org/apache/maven/model/io/xpp3/MavenXpp3Reader
Same goes with Apache HttpClient as a Maven dependency. For this I was able to solve it by importing bunch of org.apache.http packages.
I also tried this which didnt help.
This really bugs me because in all the articles and tutorials is written it should work.(that m2eclipse manages maven dependencies automatically).
I am not familiar with Maven, but as an Eclipse plug-in (osgi bundle) in order to access the class at run-time you will need to add a dependency to the package or bundle that provides those classes.
This is done in the plugin/META-INF/MANIFEST.MF file with an Import-Package or Require-Bundle manifest header. I don't know if maven/tycho does this automatically for you or not.
Also, the plug-in/bundle that provides those classes needs to specify an Export-Package in their manifest.
Related
Is it possible to retrieve the version of a specific maven dependency at runtime?
E.g. for the pom.xml:
<dependency>
<groupId>foo.bar</groupId>
<artifactId>foobar</artifactId>
<version>1.0</version>
</dependency>
I would like to retrieve the version 1.0 of a specific dependency with artifact ID foobar.
The most problematic part here is to find a JAR by its name. Unfortunately, there is no 100% reliable way for this in Java. To get a JAR by name, you need to scan classpath of the running application which may not always be present (e.g. because custom class loaders are used or module path is used instead of classpath).
But let's assume you are not using any fancy features like custom class loaders and you got your classpath which contains all your Maven dependencies. What do you need to do now? I'll try to describe a rough algorithm:
Retrieve paths of all JAR files from your classpath.
Scan each JAR file and find the file pom.properties. It's located in META-INF/maven/{groupId}/{artifactId}.
Find the value of the version property in pom.properties.
Again, this solution will not be completely reliable. You have to decide: do you really need the version information and for what purposes?
Are you looking at jars you created yourself? Or third-party libaries? I have published a lightweight solution for the former. So if the packaging of the jars you are looking for at runtime is in your own hands, go ahead and give it a try ;-). It may be a little more elegant than having to read XML or properties from jar files.
The idea
use a Java service loader approach to be able to add as many components/artifacts later, which can contribute their own versions at runtime. Create a very lightweight library with just a few lines of code to read, find, filter and sort all of the artifact versions on the classpath.
Create a maven source code generator plugin that generates the service implementation for each of the modules at compile time, package a very simple service in each of the jars.
The solution
Part one of the solution is the artifact-version-service library, which can be found on github and MavenCentral now. It covers the service definition and a few ways to get the artifact versions at runtime.
Part two is the artifact-version-maven-plugin, which can also be found on github and MavenCentral. It is used to have a hassle-free generator implementing the service definition for each of the artifacts.
Examples
Fetching all modules with coordinates
No more reading jar manifests, just a simple method call:
// iterate list of artifact dependencies
for (Artifact artifact : ArtifactVersionCollector.collectArtifacts()) {
// print simple artifact string example
System.out.println("artifact = " + artifact);
}
A sorted set of artifacts is returned. To modify the sorting order, provide a custom comparator:
new ArtifactVersionCollector(Comparator.comparing(Artifact::getVersion)).collect();
This way the list of artifacts is returned sorted by version numbers.
Find a specific artifact
ArtifactVersionCollector.findArtifact("foo.bar", "foobar");
Fetches the version details for a specific artifact.
Find artifacts with matching groupId(s)
Find all artifacts with groupId foo.bar (exact match):
ArtifactVersionCollector.findArtifactsByGroupId("foo.bar", true);
Find all artifacts where groupId starts with foo.bar:
ArtifactVersionCollector.findArtifactsByGroupId("foo.bar", false);
Sort result by version number:
new ArtifactVersionCollector(Comparator.comparing(Artifact::getVersion)).artifactsByGroupId("foo.", false);
Implement custom actions on list of artifacts
By supplying a lambda, the very first example could be implemented like this:
ArtifactVersionCollector.iterateArtifacts(a -> {
System.out.println(a);
return false;
});
Installation
Add these two tags to all pom.xml files, or maybe to a company master pom somewhere:
<build>
<plugins>
<plugin>
<groupId>de.westemeyer</groupId>
<artifactId>artifact-version-maven-plugin</artifactId>
<version>1.1.0</version>
<executions>
<execution>
<goals>
<goal>generate-service</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>de.westemeyer</groupId>
<artifactId>artifact-version-service</artifactId>
<version>1.1.0</version>
</dependency>
</dependencies>
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>WDProject</artifactId>
<version>1.0-SNAPSHOT</version>
<name>WDProject</name>
<url>http://www.nosite.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<selenium.version>3.141.59</selenium.version>
<webdrivermanager.version>3.7.1</webdrivermanager.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/io.github.bonigarcia/webdrivermanager -->
<dependency>
<groupId>io.github.bonigarcia</groupId>
<artifactId>webdrivermanager</artifactId>
<version>${webdrivermanager.version}</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-api</artifactId>
<version>${selenium.version}</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-server</artifactId>
<version>${selenium.version}</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-remote-driver</artifactId>
<version>${selenium.version}</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>${selenium.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>net.lingala.zip4j</groupId>
<artifactId>zip4j</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-model</artifactId>
<version>3.3.9</version>
</dependency>
</dependencies>
<build>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>3.7.1</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.0.0</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
Although what you want is to search for a specific dependency, the below code retrieves all the details of the dependencies available in pom file.
You just need to create a wrapper method to retrieve details of specific dependencies.
import org.apache.maven.model.Model;
import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
import java.io.FileReader;
import java.io.IOException;
class SampleMavenDependencyReader {
public static void main(String[] args) throws IOException, XmlPullParserException {
MavenXpp3Reader reader = new MavenXpp3Reader();
Model model = reader.read(new FileReader("/Users/nonadmin/bins/projects/IdeaProjects/WDProject/pom.xml"));
for (int i = 0; i < model.getDependencies().size(); i++) {
System.out.println(model.getDependencies().get(i));
}
}
}
OUTPUT
Dependency {groupId=junit, artifactId=junit, version=4.11, type=jar}
Dependency {groupId=io.github.bonigarcia, artifactId=webdrivermanager, version=${webdrivermanager.version}, type=jar}
Dependency {groupId=org.seleniumhq.selenium, artifactId=selenium-api, version=${selenium.version}, type=jar}
Dependency {groupId=org.seleniumhq.selenium, artifactId=selenium-server, version=${selenium.version}, type=jar}
Dependency {groupId=org.seleniumhq.selenium, artifactId=selenium-remote-driver, version=${selenium.version}, type=jar}
Dependency {groupId=org.seleniumhq.selenium, artifactId=selenium-java, version=${selenium.version}, type=jar}
Dependency {groupId=net.lingala.zip4j, artifactId=zip4j, version=2.2.4, type=jar}
Dependency {groupId=org.apache.maven, artifactId=maven-model, version=3.3.9, type=jar}~~~
I am trying to create a program that will use the sikulix libraries. So I copy pasted the dependencies from https://mvnrepository.com/artifact/com.sikulix/sikulixapi/1.1.2. Then I ran mvn install to install the libraries and I got this error
[ERROR] Failed to execute goal on project auto-fish: Could not resolve dependencies for project com.bine:auto-fish:jar:1.0: Could not find artifact com.github.vidstige:jadb:jar:-v1.0-g94ebf38-23 in central (https://repo.maven.apache.org/maven2)
After doing some research I realized I may need to add a repositories tag with the sikulixapi repo. That gave me this error.
[ERROR] Failed to execute goal on project auto-fish: Could not resolve dependencies for project com.bine:auto-fish:jar:1.0: Could not find artifact com.github.vidstige:jadb:jar:-v1.0-g94ebf38-23 in Sikulix Repo (https://mvnrepository.com/artifact/com.sikulix/sikulixapi)
At this point I am unsure as to what I should do. This is my first every Maven project.
`
http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
<groupId>com.bine</groupId>
<artifactId>auto-fish</artifactId>
<version>1.0</version>
<name>auto-fish</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<repositories>
<repository>
<id>Sikulix Repo</id>
<url>https://mvnrepository.com/artifact/com.sikulix/sikulixapi</url>
</repository>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/com.sikulix/sikulixapi -->
<dependency>
<groupId>com.sikulix</groupId>
<artifactId>sikulixapi</artifactId>
<version>1.1.2</version>
</dependency>
</dependencies>
<build>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>3.7.1</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.0.0</version>
</plugin>
</plugins>
</pluginManagement>
</build>
`
The code is split up but note that they are all in the pom file for my maven project. Also the first 5 lines aren't not showing up for some reason but I feel like they are not important. And i'm using Vs code for all this.
And if you're wondering the goal of this is to create something that will play some dumb fishing game for me, but this is more of a test to see if I can pull it off rather than something I actually need lol.
If you look at your vidstige artifact in mvnrepository.com, you'll see it lists "Mulesoft" as the only repo that contains it. Following that link shows https://repository.mulesoft.org/nexus/content/repositories/public/ as the optional repository URL you should be adding, not the mvnrepository URL you added which was just a link to the mvnrepository search engine results.
So in short, this should hopefully work:
<repository>
<id>Mulesoft Repo</id>
<url>https://repository.mulesoft.org/nexus/content/repositories/public/</url>
</repository>
Note I'm unfamiliar with this repository, so if it requires any kind of authentication or licensing you would want to follow up with instructions from that repo owner.
Alternatively you can skip the dependency download using exclusion.
Since i am not aware of your source code. I am just suggesting this solution
<dependency>
<exclusions>
<exclusion>
<groupId>com.github.vidstige</groupId>
<artifactId>jadb</artifactId>
</exclusion>
</exclusions>
</dependency>
Solution found from LaunchPad
I'm having issues with my Maven project. I am trying to use the command "mvn clean install" but I'm having no success. I have updated & cleaned the Maven project in the Eclipse IDE. I have also deleted the folder "repository" within the ".m2" directory. This creates the folder again but I keep getting the same error:
My pom.xml file:
<properties>
<version.thorntail>2.2.0.Final</version.thorntail>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<failOnMissingWebXml>false</failOnMissingWebXml>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>io.thorntail</groupId>
<artifactId>bom-all</artifactId>
<version>${version.thorntail}</version>
<scope>import</scope>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<finalName>demo</finalName>
<plugins>
<plugin>
<groupId>io.thorntail</groupId>
<artifactId>thorntail-maven-plugin</artifactId>
<version>${version.thorntail}</version>
<executions>
<execution>
<goals>
<goal>package</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>io.thorntail</groupId>
<artifactId>jaxrs</artifactId>
</dependency>
<dependency>
<groupId>io.thorntail</groupId>
<artifactId>cdi</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate.ogm</groupId>
<artifactId>hibernate-ogm-mongodb</artifactId>
<version>5.0.0.Final</version>
</dependency>
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
<version>3.8.0</version>
</dependency>
</dependencies>
Any help would be greatly apreciated!
The problem is the Maven version (BTW which one are you using?)
When I run my Thorntail project using eclipse's embedded maven (version 3.5.3 ) it works.
When I run it using my local maven (version 3.6.0) I get the same error.
Solution: use a compatible version of maven. ( try 3.5.3 or 3.5.4) both work without issues with thorntail.
If you want to configure a different eclipse maven version go to:
Eclipse -> preferences -> Maven -> installations
there you can add a new one.
There's a problem due to third-party dependencies in Thorntail 2.x, that are incompatible with latest Maven release. The new Thorntail version should be the 2.3.0.Final once released.
On GitHub, you can track the status of the issue here
Archive for required library: 'C:/Users/TOPS/.m2/repository/net/bytebuddy/byte-buddy/1.7.5/byte-buddy-1.7.5.jar' in project 'Maven1' cannot be read or is not a valid ZIP file
this is the error which is shown in Problem window in eclipse
Steps I have done to convert seleniumn project
Create a simple selenium webdriver project
convert it to maven project
remove all the selenium jar from the library options
In pom.xml add all the dependencies
Add the JRE and Maven from Add library options
Then it is showing me this error.
My pom.xml file is this
if there is anything missing then plz tell me
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>Maven1</groupId>
<artifactId>Maven1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-server</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>3.7.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>surefire-booter</artifactId>
<version>2.20.1</version>
</dependency>
</dependencies>
</project>
About Byte Buddy
Byte Buddy is a Java library for creating Java classes at run time. This artifact is a build of Byte Buddy with a remaining dependency onto ASM. You should never depend on this module without repackaging Byte Buddy and ASM into your own namespace.
As you are seeing an error as Archive for required library: 'C:/Users/TOPS/.m2/repository/net/bytebuddy/byte-buddy/1.7.5/byte-buddy-1.7.5.jar' in project 'Maven1' cannot be read or is not a valid ZIP file I will suggest the following steps :
Remove all the dependencies and do maven clean and maven install
Add the required Selenium dependency only
Either add selenium-server or selenium-java as a dependency as per your exact requirement.
Use only the latest Selenium dependencies from Maven Artifact current one being <version>3.7.1</version>
Use only compatible junit dependencies
I can see you have used the surefire-booter dependency as follows (cross check if you need it):
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>surefire-booter</artifactId>
<version>2.20.1</version>
</dependency>
Finally, the maven-surefire-plugin is clearly missing. You need to add the following plugin :
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.17</version>
<configuration>
<suiteXmlFiles>
<suiteXmlFile>${suiteXmlFile}</suiteXmlFile>
</suiteXmlFiles>
</configuration>
</plugin>
Hi I am using followng maven dependencies. When I run the application in Eclipse, it is working fine. but when i deploy the application as jar file, it is throwing following error.
Caused by: java.lang.ClassNotFoundException: org.glassfish.jersey.client.JerseyClientBuilder
at java.net.URLClassLoader.findClass(Unknown Source)
Following is my maven dependency file.
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
<version>${jersey.client.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
<version>${jersey.client.version}</version>
</dependency>
<!-- http://mvnrepository.com/artifact/com.googlecode.json-simple/json-simple -->
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1</version>
</dependency>
</dependencies>
<properties>
<jersey.client.version>2.21</jersey.client.version>
</properties>
<dependencies>
Any help on this.... I gone through following link, but it don't help me.
running standalone java executable in eclipse results in NoClassDefFound
If you distribute only single jar (not fat-jar/uber-jar) you need to provide the classpath to it, that is all the library jars that are required to run it.
In your case it would be something along this lines:
java -jar my.jar -cp $HOME/.m2/repository/org/glassfish/jersey/core/jersey-client/2.21/jersey-client-2.21.jar
And after : you need to add all other dependencies that you have.
Another option is to use e.g. assembly plugin to build uber jar (jar that will contain all other jars, libraries and your code): http://maven.apache.org/plugins/maven-assembly-plugin/usage.html:
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.6</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
</plugins>
</build>
And then build the jar using: mvn clean package assembly:single, and see that now you have two jars inside target, the larger one is the uber jar that you can distribute.
Maybe You are missing the Maven dependency below in your pom.xml
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-client</artifactId>
<version>3.0.2.Final</version>
</dependency>