CODEWITHSUNDEEP
javaspringmaven
Sergei Ledvanov
Sergei Ledvanov

Reputation: 2251

Maven repo does not work

I am trying to add a maven repository mvnrepository.com, but it seems that I fail doing this.

<repository>
    <id>mvnrepository</id>
    <url>http://mvnrepository.com/artifact/</url>         
</repository>

I can clearly see that the artifact I am looking for is there http://mvnrepository.com/artifact/org.springframework.ldap/spring-ldap/1.3.1.RELEASE

But my maven build output reports me that it's not

Downloading: http://mvnrepository.com/artifact//org/springframework/ldap/spring-ldap/1.3.1.RELEASE/spring-ldap-1.3.1.RELEASE.jar [INFO] Unable to find resource 'org.springframework.ldap:spring-ldap:jar:1.3.1.RELEASE' in repository mvnrepository (http://mvnrepository.com/artifact/)

What am I doing wrong? How can I download spring ldap artifact?

UPDATE I have tried several artifactories, but all of them fail

Downloading: http://repo1.maven.org/maven2//org/springframework/ldap/spring-ldap/1.3.1.RELEASE/spring-ldap-1.3.1.RELEASE.jar [INFO] Unable to find resource 'org.springframework.ldap:spring-ldap:jar:1.3.1.RELEASE' in repository maven central repo (http://repo1.maven.org/maven2/) Downloading: http://download.java.net/maven/2//org/springframework/ldap/spring-ldap/1.3.1.RELEASE/spring-ldap-1.3.1.RELEASE.jar [INFO] Unable to find resource 'org.springframework.ldap:spring-ldap:jar:1.3.1.RELEASE' in repository java.net repo (http://download.java.net/maven/2/) Downloading: http://maven.springframework.org/external//org/springframework/ldap/spring-ldap/1.3.1.RELEASE/spring-ldap-1.3.1.RELEASE.jar [INFO] Unable to find resource 'org.springframework.ldap:spring-ldap:jar:1.3.1.RELEASE' in repository spring external (http://maven.springframework.org/external/) Downloading: http://search.maven.org//org/springframework/ldap/spring-ldap/1.3.1.RELEASE/spring-ldap-1.3.1.RELEASE.jar [INFO] Unable to find resource 'org.springframework.ldap:spring-ldap:jar:1.3.1.RELEASE' in repository repo.jenkins-ci.org (http://search.maven.org/) Downloading: https://repository.jboss.org//org/springframework/ldap/spring-ldap/1.3.1.RELEASE/spring-ldap-1.3.1.RELEASE.jar [INFO] Unable to find resource 'org.springframework.ldap:spring-ldap:jar:1.3.1.RELEASE' in repository mvnrepository (https://repository.jboss.org/) Downloading: http://repo1.maven.org/maven2//org/springframework/ldap/spring-ldap/1.3.1.RELEASE/spring-ldap-1.3.1.RELEASE.jar [INFO] Unable to find resource 'org.springframework.ldap:spring-ldap:jar:1.3.1.RELEASE' in repository central (http://repo1.maven.org/maven2/)

If I do not define any repositories in settings.xml, then the response is the following:

Downloading: http://repo1.maven.org/maven2/org/springframework/ldap/spring-ldap/1.3.1.RELEASE/spring-ldap-1.3.1.RELEASE.jar [INFO] Unable to find resource 'org.springframework.ldap:spring-ldap:jar:1.3.1.RELEASE' in repository central (http://repo1.maven.org/maven2)

UPDATE Besides, I use gradle in other projects, and this works seamlessly

repositories {
    mavenCentral()
    mavenLocal()
}

dependencies {
    compile 'org.springframework.ldap:spring-ldap:1.3.1.RELEASE'
}

So I am pretty sure there is some maven repo I don't know about

Upvotes: 1

Views: 3112

Answers (3)

JBaruch
JBaruch

Reputation: 22893

As @techbost mentioned, maven can't resolve spring-ldap-1.3.1.RELEASE.jar from any repository, because such jar does not exist.

Let's see what's going on. You define your dependency in the following way:

<dependency>
    <groupId>org.springframework.ldap</groupId>
    <artifactId>spring-ldap</artifactId>
    <version>1.3.1.RELEASE</version>
</dependency>

If you don't specify a type tag, the default type is jar. Which means that Maven tries to hit this URL to get the file: http://repo1.maven.org/maven2/org/springframework/ldap/spring-ldap/1.3.1.RELEASE/spring-ldap-1.3.1.RELEASE.jar

As you see, this file does not exist. That's because the spring-ldap module does not have a jar, it's a pom packaging module, which means it only has pom file, which has common configuration for submodules and definition of those submodules.

Next you might want to define a type to be pom:

<dependency>
    <groupId>org.springframework.ldap</groupId>
    <artifactId>spring-ldap</artifactId>
    <version>1.3.1.RELEASE</version>
    <type>pom</type>
</dependency>

One might think that should work, because now you instruct maven to download a pom file, which does exist: http://repo1.maven.org/maven2/org/springframework/ldap/spring-ldap/1.3.1.RELEASE/spring-ldap-1.3.1.RELEASE.pom

Well, it won't work as well. That's because pom artifact is not a real dependency (just for reminder - dependencies are files that added to your classpath for compilation, testing and packaging, so it makes no sense to have a pom file in classpath).

What you actually need is one of the two:

  • Use specific submodule of spring-ldap, e.g. spring-ldap-core.
  • Use the all classifer of spring-ldap module. In this case you'll bring all the modules, in a single jar. Although it might ease your configuration, it's strongly discouraged particle.

In the former case, your dependency declaration will look like:

<dependency>
    <groupId>org.springframework.ldap</groupId>
    <artifactId>spring-ldap-core</artifactId>
    <version>1.3.1.RELEASE</version>
</dependency>

This works.

In the later case your dependency declaration will be as following:

<dependency>
    <groupId>org.springframework.ldap</groupId>
    <artifactId>spring-ldap</artifactId>
    <version>1.3.1.RELEASE</version>
    <classifier>all</classifier>
</dependency>

This works as well, although it's really bad idea.

P.S. mvnrepository site is not a real maven repository. It's a site for searching and browsing artifacts in maven-central and was usable when maven central didn't have search.

The two repositories I can suggest are:

  1. jcenter - superset of Maven Central, https by default, web identity of the publishers, richer UI, etc. See https://bintray.com/bintray/jcenter for more details (Set me up button will give you instructions on how to use it with Maven)
  2. Maven Central over https - here are the Maven setup instructions.

Upvotes: 1

Dheeraj Arora
Dheeraj Arora

Reputation: 608

The spring-ldap artifact is pom type. To specify any artifact other than jar you need to specify the type. So the artifact you need to specify in your pom is 

<dependency>
    <groupId>org.springframework.ldap</groupId>
    <artifactId>spring-ldap</artifactId>
    <version>1.3.1.RELEASE</version>
    <type>pom</type>
</dependency>

Hope this helps

Upvotes: 2

Dheeraj Arora
Dheeraj Arora

Reputation: 608

I don't think you need to add any extra repository tag to fetch spring-ldap artifact.

You only need to specify the repository when the artifact doesn't belong to the default maven repo for e.g., Jboss Repository https://repository.jboss.org/, you need to add this in your pom to fetch any artifact of this repository.

you simple add below dependency in your pom and it should work.

<dependency>
    <groupId>org.springframework.ldap</groupId>
    <artifactId>spring-ldap</artifactId>
    <version>1.3.1.RELEASE</version>
</dependency>

Are you having any problem in downloading artifact without specifying repository?

Upvotes: 0

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