The Aether Team maintains a demo page with such an example: FindNewestVersion
.
Simplified a bit, this is what it comes down to.
Add to your POM the Aether dependencies:
<dependencies>
<dependency>
<groupId>org.eclipse.aether</groupId>
<artifactId>aether-impl</artifactId>
<version>${aetherVersion}</version>
</dependency>
<dependency>
<groupId>org.eclipse.aether</groupId>
<artifactId>aether-connector-basic</artifactId>
<version>${aetherVersion}</version>
</dependency>
<dependency>
<groupId>org.eclipse.aether</groupId>
<artifactId>aether-transport-file</artifactId>
<version>${aetherVersion}</version>
</dependency>
<dependency>
<groupId>org.eclipse.aether</groupId>
<artifactId>aether-transport-http</artifactId>
<version>${aetherVersion}</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-aether-provider</artifactId>
<version>${mavenVersion}</version>
</dependency>
</dependencies>
<properties>
<aetherVersion>1.1.0</aetherVersion>
<mavenVersion>3.3.9</mavenVersion>
</properties>
And then, you can use it like such:
public static void main(String[] args) {
RemoteRepository central = new RemoteRepository.Builder("central", "default", "http://repo1.maven.org/maven2/").build();
RepositorySystem repoSystem = newRepositorySystem();
RepositorySystemSession session = newSession(repoSystem);
Artifact artifact = new DefaultArtifact("groupId:artifactId:(0,]");
VersionRangeRequest request = new VersionRangeRequest(artifact, Arrays.asList(central), null);
try {
VersionRangeResult versionResult = repoSystem.resolveVersionRange(session, request);
System.out.println(versionResult.getHighestVersion());
} catch (VersionRangeResolutionException e) {
e.printStackTrace();
}
}
private static RepositorySystem newRepositorySystem() {
DefaultServiceLocator locator = MavenRepositorySystemUtils.newServiceLocator();
locator.addService(RepositoryConnectorFactory.class, BasicRepositoryConnectorFactory.class);
locator.addService(TransporterFactory.class, FileTransporterFactory.class);
locator.addService(TransporterFactory.class, HttpTransporterFactory.class);
return locator.getService(RepositorySystem.class);
}
private static RepositorySystemSession newSession(RepositorySystem system) {
DefaultRepositorySystemSession session = MavenRepositorySystemUtils.newSession();
LocalRepository localRepo = new LocalRepository("target/local-repo");
session.setLocalRepositoryManager(system.newLocalRepositoryManager(session, localRepo));
return session;
}
This creates a reference to the Maven Central repository and uses the version ranges [0,)
to specify that we’re interested in all versions with an unbounded maximal value. Finally, a version range query is performed and that enables us to determine the latest version.