maven-resolver-demos/maven-resolver-demo-snippets/src/main/java/org/apache/maven/resolver/examples/manual/ManualRepositorySystemFactory.java

package org.apache.maven.resolver.examples.manual;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *  http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import org.apache.maven.repository.internal.MavenRepositorySystemUtils;
import org.eclipse.aether.RepositorySystem;
import org.eclipse.aether.connector.basic.BasicRepositoryConnectorFactory;
import org.eclipse.aether.impl.DefaultServiceLocator;
import org.eclipse.aether.spi.connector.RepositoryConnectorFactory;
import org.eclipse.aether.spi.connector.transport.TransporterFactory;
import org.eclipse.aether.transport.file.FileTransporterFactory;
import org.eclipse.aether.transport.http.HttpTransporterFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A factory for repository system instances that employs Maven Artifact Resolver's built-in service locator
 * infrastructure to wire up the system's components.
 */
public class ManualRepositorySystemFactory
{
    private static final Logger LOGGER = LoggerFactory.getLogger( ManualRepositorySystemFactory.class );

    public static RepositorySystem newRepositorySystem()
    {
        /*
         * Aether's components implement org.eclipse.aether.spi.locator.Service to ease manual wiring and using the
         * prepopulated DefaultServiceLocator, we only need to register the repository connector and transporter
         * factories.
         */
        DefaultServiceLocator locator = MavenRepositorySystemUtils.newServiceLocator();
        locator.addService( RepositoryConnectorFactory.class, BasicRepositoryConnectorFactory.class );
        locator.addService( TransporterFactory.class, FileTransporterFactory.class );
        locator.addService( TransporterFactory.class, HttpTransporterFactory.class );

        locator.setErrorHandler( new DefaultServiceLocator.ErrorHandler()
        {
            @Override
            public void serviceCreationFailed( Class<?> type, Class<?> impl, Throwable exception )
            {
               LOGGER.error( "Service creation failed for {} implementation {}: {}",
                        type, impl, exception.getMessage(), exception );
            }
        } );

        return locator.getService( RepositorySystem.class );
    }

}