Maven dependency doesn't get downloaded - eclipse

I have a Maven Scala project and in the pom.xml I have this dependency
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.11.7</version>
</dependency>
I have this project in Eclipse but for some reason Eclipse keeps telling me that this jar file doesn't exist and it is now shown under Maven dependency section. This is not the case for other dependencies. what is wrong with this one?

Related

Is there a reason why the Eclipse build cannot find a Maven lib

Is there a reason why eclipse can't find this lib when it is added in Maven dependency with success.
Is there an error here ?
This is the Maven dependency:
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson-provider</artifactId>
<version>2.3.1.GA</version>
</dependency>
The dependency mentioned is not the correct dependency since it is not the artifact of the RESTEasy JAX RS Implementation. Therefore it neither contains org.jboss.resteasy.ClientRequest nor org.jboss.resteasy.ClientResponse.
In order to have access to the required classes, the dependency ought to be used is the following:
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>${resteasy.version}</version>
</dependency>

eclipse maven dependencies pom file

Hi does anybody know where do i need to setup the mahout.version property in order for eclipse to get the latest version of the dependency?
<dependency>
<groupId>org.apache.mahout</groupId>
<artifactId>mahout-core</artifactId>
<version>${mahout.version}</version>
</dependency>
if you have a super pom or parent pom.xml you can make the properties like this :
<properties>
<mahout.version>0.9</mahout.version>
</properties>
Please replace following in your pom.xml of maven build.
<dependency>
<groupId>org.apache.mahout</groupId>
<artifactId>mahout-core</artifactId>
<version>0.8</version>
</dependency>

Maven generates old and unwanted RichFaces jars

I have a JSF 2.0 project and when I run 'mvn package' from eclipse (right click on the pom file and run) I get the war file with older versions of the richfaces jars along with the latest jars as shown in the image below.
pom.xml:
<properties>
<org.richfaces.bom.version>4.3.4.Final</org.richfaces.bom.version>
</properties>
<dependencies>
<!-- Mojarra implementation of JSF spec 2.2 -->
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.faces</artifactId>
<version>2.1.6</version>
</dependency>
<dependency>
<groupId>org.richfaces</groupId>
<artifactId>richfaces-bom</artifactId>
<version>${org.richfaces.bom.version}</version>
<scope>import</scope>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.richfaces.ui</groupId>
<artifactId>richfaces-components-ui</artifactId>
<version>${org.richfaces.bom.version}</version>
</dependency>
<dependency>
<groupId>org.richfaces.core</groupId>
<artifactId>richfaces-core-impl</artifactId>
<version>${org.richfaces.bom.version}</version>
</dependency>
</dependencies>
How can I fix this? Any help would be appreciated.
Suggest you to install maven outside of eclipse and try to run 'mvn package' from command line and see if you encounter the same problem in this way as well.
You may also create a 'New Launch Configuration' in eclipse for running mvn package from inside eclipse. To do this, right click on the pom.xml file > Run as > Run configuration ...
Hit 'New launch configuration'. This will take care of any mis-configuration you might have done inadvertently in your earlier launch configuration.

Missing artifact log4j:log4j:bundle:1.2.16 when using Maven in Eclipse simplistic example

I have created simple project from maven-archetype-quickstart under Eclipse Indigo, then I went to pom.xml gui editor and in dependencies tab added dependency on log4j-1.2.16 by search in appropriate dialog.
Now my pom.xml includes tags
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
<type>bundle</type>
</dependency>
But Eclipse underlines first <dependency> tag and says Missing artifact log4j:log4j:bundle:1.2.16.
Why?
The Maven plugin for Eclipse is m2e - Maven Integration for Eclipse version 1.0.100.20110804-1717
Remove
<type>bundle</type>
and it will be fine.
log4j:log4j is actually of type jar.

Maven missing transitive dependency

I have a maven project with a dependency (datanucleus-db4o). This dependency has itself a dependency on db4o (db4o:db4o:jar:7.12.126.14142-all-java5).
Now maven says:
09.09.10 19:43:09 MESZ: Missing artifact db4o:db4o:jar:7.12.126.14142-all-java5:compile
I am new to maven. Is it right that datanucleus-db4o defines its own dependency with a specific version number? Is this a good way? m2eclipse can't download it. I downloaded a newer Version of db4o and added it to the classpath. Maven keeps writing about the missing artifact.
Also I've got NoClassDefFound errors when I launch my application. This leads me to the other question:
Am I doing something wrong?
Thanks in advance.
Here is the relevant part of the pom.xml...
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>2.2.0-m1</version>
<type>jar</type>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-db4o</artifactId>
<version>2.1.1</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
and here is the relevant part of the pom.xml of
<dependency>
<groupId>db4o</groupId>
<artifactId>db4o</artifactId>
<version>7.12.126.14142-all-java5</version>
</dependency>
Is it right that datanucleus-db4o defines its own dependency with a specific version number? Is this a good way?
I'm not sure I understood the question... Anyway, there is indeed something wrong with the db4o:db4o dependency of the datanucleus-db4o artifact: it is not available in Maven central nor in the DataNucleus repository. I don't understand how users are supposed to use the datanucleus-db4o artifact.
I downloaded a newer Version of db4o and added it to the classpath. Maven keeps writing about the missing artifact.
Not sure what you did exactly but maybe the following will work: exclude the dependency that can't be resolved and replace it with some equivalent from the db4o repository.
<dependencies>
...
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-db4o</artifactId>
<version>2.1.1</version>
<type>jar</type>
<scope>compile</scope>
<exclusions>
<exclusion>
<groupId>db4o</groupId>
<artifactId>db4o</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.db4o</groupId>
<artifactId>db4o-full-java5</artifactId>
<version>7.12-SNAPSHOT</version>
</dependency>
</dependencies>
<repositories>
...
<repository>
<id>db4o</id>
<url>https://source.db4o.com/maven</url>
</repository>
</repositories>
I have no idea if this will work of course.
Also I've got NoClassDefFound errors when I launch my application. This leads me to the other question:
Can't say since you didn't post the error. But give the above a try.
The required file is not in the maven repositories, but it is in the datanucleus zip file (that one with all dependencies). Look into the /deps folder.
I unpacked it and installed it into the local maven repository with this command:
./mvn install:install-file -Dfile=/home/myUser/Downloads/db4o-7.12.126.14142-all-java5.jar -DgroupId=db4o -DartifactId=db4o -Dversion=7.12.126.14142-all-java5 -Dpackaging=jar
After that it is found by maven. Now there are other problems going on. I'll try to solve them myself...
Seems like the JDO or Datanucleus stuff is not well organized at the moment. I think they refactored some classes and now they can't be found at some versions and implementations are incompatible with the api and such stuff.