Develop Reference

Using github repository as maven dependency

I have one project created which contains some reusable methods which can be used in other projects by adding it as a dependency. To do the same I have added the following in pom.xml file and when I run mvn clean deploy branch is created successfully with artifacts.
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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.6</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.abc</groupId>
<artifactId>api-authenticator</artifactId>
<version>1.0.0</version>
<name>API Authenticator</name>
<description>Project to authenticate API usage</description>
<distributionManagement>
<repository>
<id>internal.repo</id>
<name>Staging Repository</name>
<url>file://${project.build.directory}/${version}</url>
</repository>
</distributionManagement>
<properties>
<github.global.server>github</github.global.server>
<java.version>11</java.version>
<java-jwt.version>3.16.0</java-jwt.version>
<jwks-rsa.version>0.18.0</jwks-rsa.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>com.auth0</groupId>
<artifactId>java-jwt</artifactId>
<version>${java-jwt.version}</version>
</dependency>
<dependency>
<groupId>com.auth0</groupId>
<artifactId>jwks-rsa</artifactId>
<version>${jwks-rsa.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>11</source>
<target>11</target>
</configuration>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>com.github.github</groupId>
<artifactId>site-maven-plugin</artifactId>
<version>0.12</version>
<configuration>
<message>Maven artifacts for ${project.version}</message>
<noJekyll>true</noJekyll>
<outputDirectory>${project.build.directory}</outputDirectory>
<branch>refs/heads/${version}</branch>
<includes>
<include>**/*</include>
</includes>
<merge>true</merge>
<repositoryName>rwg-dip-api-authenticator</repositoryName>
<repositoryOwner>robert-walters</repositoryOwner>
<server>github</server>
</configuration>
<executions>
<execution>
<goals>
<goal>site</goal>
</goals>
<phase>deploy</phase>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
<configuration>
<altDeploymentRepository>
internal.repo::default::file://${project.build.directory}/${version}
</altDeploymentRepository>
</configuration>
</plugin>
</plugins>
</build>
</project>
In settings.xml (Maven home: /opt/homebrew/Cellar/maven/3.8.2/libexec) I have generated personal access token with all access required and added it.
<server>
<id>github</id>
<password>access_token</password>
</server>
To use this as a dependency I have added the following in the project where I want to reuse the functions and when I do reimport the dependency from IntelliJ I can see my internal project's dependency in external dependencies But when I run the project it shows java: package com.abc.util does not exist althoght I am getting the suggestions for the class in Intellj.
<repositories>
<repository>
<id>https://github.com/me/api-authenticator</id>
<url>https://github.com/me/api-authenticator/1.0.0</url>
<snapshots>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
</snapshots>
</repository>
</repositories>
<dependency>
<groupId>com.abc</groupId>
<artifactId>api-authenticator</artifactId>
<version>1.0.0</version>
</dependency>
I have gone through the below but it was not helpful for the above case
Hosting a Maven repository on github
https://www.baeldung.com/maven-repo-github
https://dev.to/iamthecarisma/hosting-a-maven-repository-on-github-site-maven-plugin-9ch
UPDATE
As M.Deinum has suggested I have removed spring-boot-maven-plugin and now I am able to use it as depency in other projects in Intellj and it works fine locally but when the pipeline execute to create build for the project mvn package steps fails with "The POM for com.abc:api-authenticator:jar:1.0.0 is missing, no dependency information available"

If you are ok with using an external service for that, you can check https://jitpack.io/ out.
It is able to build your maven project directly from a GitHub repository and then acts as a maven repository that is serving the artifact.
It takes time to download the artifact for the first time (as it builds the project only with the first request for the artifact), but then it reuses the already built artifacts for the next requests.

Error "TestEngine with ID 'junit-jupiter' failed to discover tests". Getting this error while trying to run JUnit tests in a maven project

I am trying to run tests in a project with Apache Maven 3.8.3, JDK 14, JUnit 5.8.1, jqwik 1.5.6
I'm using IntelliJ IDEA 2021.2.3 (Community Edition)
The libraries must be correctly imported but it still doesn't work.
When I try to run simple tests I 'm getting the following error message:
"Internal Error occurred.
org.junit.platform.commons.JUnitException: TestEngine with ID 'junit-jupiter' failed to discover tests"
Here is the pom.xml file. I'd appreciate any advice and thanks in advance!
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>tests</groupId>
<artifactId>tests</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<sourceDirectory>${project.basedir}/src</sourceDirectory>
<testSourceDirectory>${project.basedir}/src/tests</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.0.0-M5</version>
<configuration>
<includes>
<include>**/*Tests.java</include>
<include>**/*Examples.java</include>
<include>**/*Properties.java</include>
</includes>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.8.1</version>
</dependency>
<dependency>
<groupId>net.jqwik</groupId>
<artifactId>jqwik</artifactId>
<version>1.5.6</version>
</dependency>
</dependencies>
<properties>
<maven.compiler.source>14</maven.compiler.source>
<maven.compiler.target>14</maven.compiler.target>
</properties>
</project>

Maven can't find artifacts

After I'd searched the net and similar StackOverflow questions and tried to apply the proposed sollutions I didn't come up with an idea how to fix this error, which gives me pom.xml:
Multiple annotations found at this line:
- Missing artifact jakarta.json:jakarta.json-
api:jar:2.0.0-RC3
- Missing artifact org.glassfish.hk2:hk2-
locator:jar:3.0.0-M2
- Missing artifact org.glassfish:jakarta.json:jar:2.0.0-
RC3
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 //error appears here
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.gson</groupId>
<artifactId>advanced-jaxrs-01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>advanced-jaxrs-01 Maven Webapp</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>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.glassfish.jersey.media/jersey-
media-moxy -->
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
<version>3.0.0-M6</version>
</dependency>
<!--
https://mvnrepository.com/artifact/org.glassfish.jersey.bundles/jaxrs-ri -
->
<dependency>
<groupId>org.glassfish.jersey.bundles</groupId>
<artifactId>jaxrs-ri</artifactId>
<version>3.0.0-M6</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>advanced-jaxrs-01</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven
defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-
bindings.html#Plugin_bindings_for_war_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-war-plugin</artifactId>
<version>3.2.2</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>
</plugins>
</pluginManagement>
I've had a look at .m2/repository and I've noticed, that there are files maven can't find. What should I do? What's the matter?

If there are files that maven can't find, you can always try to install the JAR file and going into
Project folder properties --> Java Build Path --> Add external JARs (Click on Modulepath if you cant immediately press Add External JARs)

How to launch Spring Boot app from another Maven module?

I got a project which consists of two modules.
The first one is Spring Boot REST Web Service
And the second one is the code that should work with this service.
The issue: I need to start Web Service from another module from the code.
Of course, the best option here is to deploy Service to some remote host, but what are the options if I want to launch Service on the local machine?
The first idea was packaging Service module, then copying jar to the second module using maven-dependency-plugin and launching it as:
Runtime.getRuntime().exec("java -jar my-rest-service.jar");
Can I start Spring Boot app right from another module? Call Application.main() method or something?

You can build and install first module into your local maven repository (.m2 folder by default) as the jar library. Then you can use this library in your second module as the maven dependency.
After that you can start your application (second module) as usually spring-boot starts - with the main method.
Example:
First module - library:
<?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>
<url>https://example.com/module1</url>
<groupId>com.example</groupId>
<artifactId>module1</artifactId>
<name>module1</name>
<version>1.0.0</version>
<packaging>jar</packaging>
<properties>
<java.version>12</java.version>
</properties>
<build>
<finalName>module1</finalName>
<defaultGoal>install</defaultGoal>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<inherited>true</inherited>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
<version>3.2.1</version>
<executions>
<execution>
<id>attach-sources</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Second module - application:
<?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>
<url>https://example.com/module2</url>
<groupId>com.example</groupId>
<artifactId>module2</artifactId>
<name>module2</name>
<version>1.0.0</version>
<packaging>jar</packaging>
<!--packaging>war</packaging-->
<properties>
<java.version>12</java.version>
</properties>
<build>
<finalName>module2</finalName>
<defaultGoal>package</defaultGoal>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<!-- com.example -->
<dependency>
<groupId>com.example</groupId>
<artifactId>module1</artifactId>
<version>1.0.0</version>
</dependency>
</dependencies>
</project>

The Spring Boot Maven plugins package our application as executable JARs – such a file can't be used in another project since class files are put into BOOT-INF/classes.
In order to share classes with another project, the best approach to take is to create a separate jar containing shared classes, then make it a dependency of all modules that rely on them.
So in your spring boot module, you need to add classifier like:
...
<build>
...
<plugins>
...
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<classifier>exec</classifier>
</configuration>
</plugin>
</plugins>
</build>
and of course, you need to add your spring boot module dependency in your pom where you want to use then you should be able to use Application.java.
Please check here: Using a Spring Boot Application as a Dependency.

Ear and WAR not building

Upon executing the command 'maven clean install', I get the following console screen.
My output console using m2eclipse plugin
When I visit the path mentioned in the console screen, there is only a copy of pom.xml file but not EAR and WAR file.
folder view mentioned in console
I wish to build an EAR file which contains a WAR file.
This question was posted by me today and I followed the steps as mentioned by the Gentleman.
I will also share my parent pom.xml
<artifactId>itaras</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<name>itaras</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.2</version>
</plugin>
<plugin>
<artifactId>maven-ear-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<finalName>MyEarFile</finalName>
<version>5</version>
<generatedDescriptorLocation>$D:/itaras
/ITARAS_Branch_3Aug2017/itaras/WebContent
</generatedDescriptorLocation>
<modules>
<webModule>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<uri>appITARAS.war</uri>
<bundleFileName>appITARAS.war</bundleFileName>
<contextRoot>/ITARAS</contextRoot>
</webModule>
</modules>
</configuration>
</plugin>
</plugins>
</build>
<groupId>itaras</groupId>
<profiles>
<profile>
<modules>
<module>itaras-ear</module>
<module>itaras-war</module>
<module>?</module>
</modules>
</profile>
</profiles>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>itaras</groupId>
<artifactId>itaras-war</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
</project>

If you say <packaging>pom</packaging>, you only build a pom. Your child project needs to specify war or ear as packaging.