Develop Reference

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)

Cannot load logging resource file in spring boot with java 11

I have a problem migrating my application to java 11.
I recieve a FileNotFoundException when trying to load my logging config.
java.io.FileNotFoundException: class path resource [logging/logback-local.xml] cannot be resolved to URL because it does not exist
at spring.core#5.2.1.RELEASE/org.springframework.util.ResourceUtils.getURL(ResourceUtils.java:137)
at spring.boot#2.1.10.RELEASE/org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:293)
at spring.boot#2.1.10.RELEASE/org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:264)
at spring.boot#2.1.10.RELEASE/org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:226)
at spring.boot#2.1.10.RELEASE/org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:203)
at spring.context#5.2.1.RELEASE/org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
at spring.context#5.2.1.RELEASE/org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
at spring.context#5.2.1.RELEASE/org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
at spring.context#5.2.1.RELEASE/org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127)
at spring.boot#2.1.10.RELEASE/org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:76)
at spring.boot#2.1.10.RELEASE/org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:53)
at spring.boot#2.1.10.RELEASE/org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:342)
at spring.boot#2.1.10.RELEASE/org.springframework.boot.SpringApplication.run(SpringApplication.java:305)
at spring.boot#2.1.10.RELEASE/org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
at spring.boot#2.1.10.RELEASE/org.springframework.boot.SpringApplication.run(SpringApplication.java:1204)
at FooApplicationModule#0.0.1-SNAPSHOT/foo.bar.Application.main(Application.java:23)
This is done via configuration and worked in Java 8:
This is my application.yml
logging:
config: classpath:logging/logback-local.xml
application structure looks like this:
src
-main
-java
-foo.bar.Application.java
-resources
-application.yml
-logging
-logback-local.xml
pom.xml
pom:
<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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.10.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>foo.group</groupId>
<artifactId>application</artifactId>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>11</java.version>
<spring.version>5.2.1.RELEASE</spring.version>
<spring.boot.version>2.1.10.RELEASE</spring.boot.version>
</properties>
<dependencies>
...
</dependencies>
<build>
<finalName>${project.artifactId}</finalName>
<sourceDirectory>${project.basedir}/src/main/java</sourceDirectory>
<resources>
<resource>
<directory>${project.basedir}/src/main/resources</directory>
</resource>
</resources>
<testSourceDirectory>${project.basedir}/src/test/java</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<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>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
</plugins>
</build>
</project>
I think this is a problem with the jigsaw modular system, but I could not find any solutions to this on the Internet.
Thanks for the help!

So after some fiddling around, using the suggestion from Hatice, the problem disappeared. I have no idea what caused the problem.

Maven warns me about `filename-based automodules` even thought I've defined stable name

I have a very simple project written in Java 11 with just one class. I want to package it using Maven. During compilation step Maven prints warning:
"Required filename-based automodules detected. Please don't publish
this project to a public artifact repository!"
Here I found information that I should add Automatic-Module-Name entry to the manifest file but unfortunately, it doesn't help. I still get that warning.
Do you an idea what else might be wrong? What should I do to make Maven happy?
Here is my 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>com.padamski</groupId>
<artifactId>test</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>com.pgs-soft</groupId>
<artifactId>HttpClientMock</artifactId>
<version>1.0.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.1.1</version>
<configuration>
<archive>
<manifestEntries>
<Automatic-Module-Name>com.padamski.test</Automatic-Module-Name>
</manifestEntries>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<release>11</release>
</configuration>
</plugin>
</plugins>
</build>
</project>
and module-info.java
module com.padamski.test {
requires java.net.http;
}

compling issues in maven

While i was using command -mvn install iam facing a issue like this.the issue is
Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:testCompile (default-testCompile) on project Demo: Compilation failure
[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
Am running my program in my workspace default only jre1.8, but for previous program it ran successfully.for this alone am facing issues!
My POM File
<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>Demo</groupId>
<artifactId>Demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<suiteXmlFile>src/main/resources/testng.xml</suiteXmlFile>
</properties>
<dependencies>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>2.45.0</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.8</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
<configuration>
<suiteXmlFiles>
<suiteXmlFile>${suiteXmlFile}</suiteXmlFile>
</suiteXmlFiles>
</configuration>
</plugin>
</plugins>
</build>
</project>
please help me to sort this one out!

Try setting enviroment variable JAVA_HOME pointing to jdk. https://docs.oracle.com/cd/E19182-01/820-7851/inst_cli_jdk_javahome_t/
Also, try to set the maven compiler plugin to the version of the compiler you are using.
https://maven.apache.org/plugins/maven-compiler-plugin/usage.html

flattened pom is not being used?

It is a multi-module maven project. I have included flatten-maven-plugin in my parent pom
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>flatten-maven-plugin</artifactId>
<version>1.0.0-beta-2</version>
<configuration>
</configuration>
defined a property scl_version in parent pom and used ${scl_version} in of child pom. Value is 0.0.1 .
when i run mvn flatten:flatten
It generates a warning :
[WARNING] 'version' contains an expression but should be a constant.
A flattened pom is created in all modules including parent and all the childs.
Flattened pom has value of the property in version tag of child pom. But when i give, mvn install it still gives warning that version should be constant but it is an expression.
http://mojo.codehaus.org/flatten-maven-plugin/plugin-info.html
But documentation says:
This MOJO realizes the goal flatten that generates the flattened POM
and potentially updates the POM file so that the current
MavenProject's file points to the flattened POM instead of the
original pom.xml file. The flattened POM is a reduced version of the
original POM with the focus to contain only the important information
for consuming it. Therefore information that is only required for
maintenance by developers and to build the project artifact(s) are
stripped.
so when i do mvn install it should not generate warning.
mvn install and mvn flatten:flatten both generates this warning:
[WARNING] 'version' contains an expression but should be a constant.
Am i missing something, is it not using flattened-pom.xml.
Do i need to specify something.
PARENT POM:
<?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.a.b</groupId>
<artifactId>ABC</artifactId>
<version>0.0.1</version>
<packaging>pom</packaging>
<name>ABC</name>
<modules>
<module>Resources</module>
<module>ResourceTree</module>
<module>Service</module>
<module>Transport</module>
<module>Branding</module>
properties tag starts here
<scl_version>0.0.1</scl_version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven-compiler-plugin.version>3.1</maven-compiler-plugin.version>
<karaf.deploy.build.folder>${env.KARAF_BASE}/deploy</karaf.deploy.build.folder>
property tag ends here
<profiles>
<profile>
<id>code_coverage</id>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.7.0.201403182114</version>
<executions>
<execution>
<id>default-instrument</id>
<goals>
<goal>instrument</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.12.2</version>
<configuration>
<systemPropertyVariables>
<jacoco-agent.destfile>target/jacoco.exec</jacoco-agent.destfile>
</systemPropertyVariables>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>flatten-maven-plugin</artifactId>
<version>1.0.0-beta-2</version>
<configuration>
<flattenMode>ossrh</flattenMode>
<updatePomFile>true</updatePomFile>
</configuration>
<executions>
<!-- enable flattening -->
<execution>
<id>flatten</id>
<phase>process-resources</phase>
<goals>
<goal>flatten</goal>
</goals>
</execution>
<!-- ensure proper cleanup -->
<execution>
<id>flatten.clean</id>
<phase>clean</phase>
<goals>
<goal>clean</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>org.jacoco</groupId>
<artifactId>org.jacoco.agent</artifactId>
<classifier>runtime</classifier>
<version>0.7.0.201403182114</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
generated flattened pom:
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>org.a.b</groupId>
<artifactId>ABC</artifactId>
<version>0.0.1</version>
<packaging>pom</packaging>
<name>ABC</name>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>compile</scope>
</dependency>
</dependencies>
<repositories>
<repository>
<snapshots>
<enabled>false</enabled>
</snapshots>
<id>central</id>
<name>Maven Repository Switchboard</name>
<url>http://repo1.maven.org/maven2</url>
</repository>
</repositories>
</project>
property is used in grand grand child pom ( for trail, if successfull without warning, i can iuse it everywhere):
<groupId>org.a.b</groupId>
<artifactId>CD<artifactId>
<version>${scl_version}</version>
<packaging>bundle</packaging>
<name>CD</name>
<description>OSGi bundle project.</description>
Apart from this, it has bundle plugin dependency plugin and some dependencies. In flattened pom ofthis child this version is resolved to 0.0.1

I mailed to developer of this plugin and his response is:
The warning is coming from Maven, based on the original pom.xml
Before Maven starts executing, a buildplan is created and the pom.xml
is analyzed, causing this warning. The flatten-maven plugin kicks in
later in the process generating the flattened pom.xml and making sure
that's the file being installed/deployed. Your issue can't be fixed by
the flatten-maven-plugin and won't be fixed in Maven Core (the warning
is there for a good reason).
So, it answers the question very well.