Maven Settings for multiple repositories

Question

I have the following in settings.xml

<mirrors>        <mirror>           <id>paid-jars</id>           <name>jars with license</name>           <url>http://url:8081/nexus/content/repositories/paidjars/</url>           <mirrorOf>!central</mirrorOf>       </mirror>       <mirror>           <id>Org-central</id>           <name>mirror of central</name>           <url>http://url:8081/nexus/content/repositories/central/</url>           <mirrorOf>central</mirrorOf>       </mirror>   </mirrors> 

In pom.xml I have two jars

1. apache-commons.jar (which I assumes to be downloaded from central)
2. licensed.jar (which I assume to be downloaded from paid-jars)

But when I run maven clean install it tries to download licensed.jar from Org-central.

How can I make it use paid-jars to download? Is it possible first it goes to Org-central and if fails it tries at paid-jars? If so, how? I don't want to put repo entries in pom.xml

---

Settings.xml

<?xml version="1.0" encoding="UTF-8"?>     <settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"           xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0                  http://maven.apache.org/xsd/settings-1.0.0.xsd">   <proxies>         <proxy>       <id>Proxy</id>       <active>true</active>       <protocol>http</protocol>       <username>username</username>       <password>******</password>       <host>host.url</host>       <port>8080</port>       <nonProxyHosts>local.net|internal.com</nonProxyHosts>     </proxy>   </proxies>  <mirrors>        <mirror>           <id>paid-jars</id>           <name>jars with license</name>           <url>http://url:8081/nexus/content/repositories/paidjars/</url>           <mirrorOf>!central</mirrorOf>       </mirror>       <mirror>           <id>Org-central</id>           <name>mirror of central</name>           <url>http://url:8081/nexus/content/repositories/central/</url>           <mirrorOf>central</mirrorOf>       </mirror>   </mirrors>   <profiles>       <profile>           <id>compiler</id>           <properties>               <JAVA_1_7_HOME>C:\Program Files (x86)\Java\jdk1.7.0_51\bin</JAVA_1_7_HOME>           </properties>       </profile>   </profiles> </settings> 

Answer 1

you have to setup mirror

<mirror>   <id>nexus</id>   <mirrorOf>*</mirrorOf>   <url>http://internal/nexus/content/repositories/thirdparty</url> </mirror>   <mirror>   <id>google</id>   <mirrorOf>google</mirrorOf>   <url>http://google-maven-repository.googlecode.com/svn/repository</url> </mirror>    

then add internal & external repo

<profile>      <id>nexus</id>   <repositories>      <repository>       <id>central</id>       <name>central</name>       <url>http://internal/nexus/content/repositories/thirdparty</url>     </repository>       <repository>       <id>google</id>       <name>google</name>       <url>http://google-maven-repository.googlecode.com/svn/repository</url>     </repository>    </repositories> </profile> 

Answer 2

If you need to distinguish between an internal (Nexus, Artifactory, ..) repository and Maven central, the already discussed solutions here based on multiple Mirrors using the <mirrorOf> tags capabilities (as described in the official docs also ) work fine (the same with this so Q&A ).

BUT in our case, where we wanted some libraries to be downloaded from internal Nexus 1 - and others (with the same package names, but different versions) from internal Nexus 2, those solutions didn't work. We simply couldn't use the <mirrorOf> tag.

We found another solution based on multiple <repository> definitions INSIDE of an ever activated Maven profile (it didn't work without the profile definition!!). Here's our settings.xml:

<?xml version="1.0" encoding="UTF-8"?>  <settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">      <!-- The resolution of multiple Repositories only works with profiles!-->     <profiles>         <profile>           <id>use-multiple-repos</id>           <!--Request multiple Repositories for dependencies -->           <repositories>             <repository>             <id>nexus-repository</id>             <name>Internal Nexus Repository 1 https://nexus.your.lan</name>             <url>https://nexus.your.lan/repository/maven-public/</url>             </repository>         <repository>             <id>nexus-repository-2</id>             <name>Internal Nexus Repository 2 https://nexus2.completely.other.net</name>             <url>https://nexus2.completely.other.net/repository/maven-public/</url>         </repository>           </repositories>         </profile>     </profiles>      <activeProfiles>         <!--make the profile active all the time -->         <activeProfile>use-multiple-repos</activeProfile>     </activeProfiles>  </settings> 

If you're looking for a full-blown settings.xml, where - besides the multiple repositories - also a corporate proxy is defined alongside with the credentials for maven-releases and maven-snapshots users to push to the corporate Nexus 1, have a look at this gist.

And if you want to check fast, if you're configuration is working, you could simply use maven-dependency-plugin's dependency:get:

mvn dependency:get \     -DgroupId=your.package.name \     -DartifactId=yourArtifactId \     -Dversion=YOURVERSION \     -Dpackaging=jar 

If this results in a BUILD SUCCESS, where a minimum of one dependency from Nexus 1 and one of Nexus 2 could be downloaded, everything should work as expected and looks somehow like this (omitted lot's of packages!):

[INFO] Resolving your.first.package:artifact1.jar:1.1.0 Downloaded from nexus-repository: https://nexus.your.lan/repository/maven-public/your/first/package/artifact/1.1.0/artifact2.jar (575 kB at 868 kB/s) [INFO] Resolving your.second.package:artifact2.jar:1.1.0 Downloading from nexus-repository-2: https://nexus2.completely.other.net/repository/maven-public/your/second/package/artifact2/1.1.0/artifact2.jar (14 kB at 305 kB/s)