package org.eclipse.aether.internal.impl;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import static java.util.Objects.requireNonNull;
import java.util.Set;
import javax.inject.Inject;
import javax.inject.Named;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.repository.RemoteRepository;
import org.eclipse.aether.spi.connector.transport.Transporter;
import org.eclipse.aether.spi.connector.transport.TransporterFactory;
import org.eclipse.aether.spi.connector.transport.TransporterProvider;
import org.eclipse.aether.spi.locator.Service;
import org.eclipse.aether.spi.locator.ServiceLocator;
import org.eclipse.aether.transfer.NoTransporterException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Named
public final class DefaultTransporterProvider
implements TransporterProvider, Service
{
private static final Logger LOGGER = LoggerFactory.getLogger( DefaultTransporterProvider.class );
private Collection<TransporterFactory> factories = new ArrayList<>();
public DefaultTransporterProvider()
{
}
@Inject
DefaultTransporterProvider( Set<TransporterFactory> transporterFactories )
{
setTransporterFactories( transporterFactories );
}
public void initService( ServiceLocator locator )
{
setTransporterFactories( locator.getServices( TransporterFactory.class ) );
}
public DefaultTransporterProvider addTransporterFactory( TransporterFactory factory )
{
factories.add( requireNonNull( factory, "transporter factory cannot be null" ) );
return this;
}
public DefaultTransporterProvider setTransporterFactories( Collection<TransporterFactory> factories )
{
if ( factories == null )
{
this.factories = new ArrayList<>();
}
else
{
this.factories = factories;
}
return this;
}
public Transporter newTransporter( RepositorySystemSession session, RemoteRepository repository )
throws NoTransporterException
{
requireNonNull( repository, "remote repository cannot be null" );
PrioritizedComponents<TransporterFactory> factories = new PrioritizedComponents<>( session );
for ( TransporterFactory factory : this.factories )
{
factories.add( factory, factory.getPriority() );
}
List<NoTransporterException> errors = new ArrayList<>();
for ( PrioritizedComponent<TransporterFactory> factory : factories.getEnabled() )
{
try
{
Transporter transporter = factory.getComponent().newInstance( session, repository );
if ( LOGGER.isDebugEnabled() )
{
StringBuilder buffer = new StringBuilder( 256 );
buffer.append( "Using transporter " ).append( transporter.getClass().getSimpleName() );
Utils.appendClassLoader( buffer, transporter );
buffer.append( " with priority " ).append( factory.getPriority() );
buffer.append( " for " ).append( repository.getUrl() );
LOGGER.debug( buffer.toString() );
}
return transporter;
}
catch ( NoTransporterException e )
{
errors.add( e );
}
}
if ( LOGGER.isDebugEnabled() && errors.size() > 1 )
{
String msg = "Could not obtain transporter factory for " + repository;
for ( Exception e : errors )
{
LOGGER.debug( msg, e );
}
}
StringBuilder buffer = new StringBuilder( 256 );
if ( factories.isEmpty() )
{
buffer.append( "No transporter factories registered" );
}
else
{
buffer.append( "Cannot access " ).append( repository.getUrl() );
buffer.append( " using the registered transporter factories: " );
factories.list( buffer );
}
throw new NoTransporterException( repository, buffer.toString(), errors.size() == 1 ? errors.get( 0 ) : null );
}
}