Setting up Multiple Repositories

There are two different ways that you can specify the use of multiple repositories. The first way is to specify in a POM which repositories you want to use. That is supported both inside and outside of build profiles:

<project>
...
  <repositories>
    <repository>
      <id>my-repo1</id>
      <name>your custom repo</name>
      <url>http://jarsm2.dyndns.dk</url>
    </repository>
    <repository>
      <id>my-repo2</id>
      <name>your custom repo</name>
      <url>http://jarsm2.dyndns.dk</url>
    </repository>
  </repositories>
...
</project>

NOTE: You will also get the standard set of repositories as defined in the Super POM.

The other way you can specify multiple repositories is by creating a profile in the ${user.home}/.m2/settings.xml or ${maven.home}/conf/settings.xml file like the following:

<settings>
 ...
 <profiles>
   ...
   <profile>
     <id>myprofile</id>
     <repositories>
       <repository>
         <id>my-repo2</id>
         <name>your custom repo</name>
         <url>http://jarsm2.dyndns.dk</url>
       </repository>
     </repositories>
   </profile>
   ...
 </profiles>

 <activeProfiles>
   <activeProfile>myprofile</activeProfile>
 </activeProfiles>
 ...
</settings>

If you specify repositories in profiles you must remember to activate that particular profile! As you can see above we do this by registering a profile to be active in the activeProfiles element.

You could also activate this profile on the command like by executing the following command:

mvn -Pmyprofile ...

In fact the -P option will take a CSV list of profiles to activate if you wish to activate multiple profiles simultaneously.

Note: The settings descriptor documentation can be found on the Maven Local Settings Model Website.

Repository Order

Remote repository URLs are queried in the following order for artifacts until one returns a valid result:

  1. effective settings:
    1. Global settings.xml
    2. User settings.xml
  2. local effective build POM:
    1. Local pom.xml
    2. Parent POMs, recursively
    3. Super POM
  3. effective POMs from dependency path to the artifact.

For each of these locations, the repositories within the profiles are queried first in the order outlined at Introduction to build profiles.

Effective settings and local build POM, with profile taken into account, can easily be reviewed to see their repositories order with mvn help:effective-settings and mvn help:effective-pom -Dverbose.