001package org.eclipse.aether.internal.impl;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import java.util.ArrayList;
023import java.util.Collection;
024import java.util.List;
025import static java.util.Objects.requireNonNull;
026import java.util.Set;
027
028import javax.inject.Inject;
029import javax.inject.Named;
030import javax.inject.Singleton;
031
032import org.eclipse.aether.RepositorySystemSession;
033import org.eclipse.aether.impl.RemoteRepositoryFilterManager;
034import org.eclipse.aether.impl.RepositoryConnectorProvider;
035import org.eclipse.aether.internal.impl.filter.FilteringRepositoryConnector;
036import org.eclipse.aether.repository.Authentication;
037import org.eclipse.aether.repository.Proxy;
038import org.eclipse.aether.repository.RemoteRepository;
039import org.eclipse.aether.spi.connector.RepositoryConnector;
040import org.eclipse.aether.spi.connector.RepositoryConnectorFactory;
041import org.eclipse.aether.spi.connector.filter.RemoteRepositoryFilter;
042import org.eclipse.aether.spi.locator.Service;
043import org.eclipse.aether.spi.locator.ServiceLocator;
044import org.eclipse.aether.transfer.NoRepositoryConnectorException;
045import org.slf4j.Logger;
046import org.slf4j.LoggerFactory;
047
048/**
049 */
050@Singleton
051@Named
052public class DefaultRepositoryConnectorProvider
053    implements RepositoryConnectorProvider, Service
054{
055
056    private static final Logger LOGGER = LoggerFactory.getLogger( DefaultRepositoryConnectorProvider.class );
057
058    private Collection<RepositoryConnectorFactory> connectorFactories = new ArrayList<>();
059
060    private RemoteRepositoryFilterManager remoteRepositoryFilterManager;
061
062    public DefaultRepositoryConnectorProvider()
063    {
064        // enables default constructor
065    }
066
067    @Inject
068    DefaultRepositoryConnectorProvider( Set<RepositoryConnectorFactory> connectorFactories,
069                                        RemoteRepositoryFilterManager remoteRepositoryFilterManager )
070    {
071        setRepositoryConnectorFactories( connectorFactories );
072        setRemoteRepositoryFilterManager( remoteRepositoryFilterManager );
073    }
074
075    public void initService( ServiceLocator locator )
076    {
077        setRepositoryConnectorFactories( locator.getServices( RepositoryConnectorFactory.class ) );
078        setRemoteRepositoryFilterManager( locator.getService( RemoteRepositoryFilterManager.class ) );
079    }
080
081    public DefaultRepositoryConnectorProvider addRepositoryConnectorFactory( RepositoryConnectorFactory factory )
082    {
083        connectorFactories.add( requireNonNull( factory, "repository connector factory cannot be null" ) );
084        return this;
085    }
086
087    public DefaultRepositoryConnectorProvider setRepositoryConnectorFactories(
088            Collection<RepositoryConnectorFactory> factories )
089    {
090        if ( factories == null )
091        {
092            this.connectorFactories = new ArrayList<>();
093        }
094        else
095        {
096            this.connectorFactories = factories;
097        }
098        return this;
099    }
100
101    public DefaultRepositoryConnectorProvider setRemoteRepositoryFilterManager(
102            RemoteRepositoryFilterManager remoteRepositoryFilterManager )
103    {
104        this.remoteRepositoryFilterManager = requireNonNull( remoteRepositoryFilterManager );
105        return this;
106    }
107
108    public RepositoryConnector newRepositoryConnector( RepositorySystemSession session, RemoteRepository repository )
109        throws NoRepositoryConnectorException
110    {
111        requireNonNull( repository, "remote repository cannot be null" );
112
113        if ( repository.isBlocked() )
114        {
115            if ( repository.getMirroredRepositories().isEmpty() )
116            {
117                throw new NoRepositoryConnectorException( repository, "Blocked repository: " + repository );
118            }
119            else
120            {
121                throw new NoRepositoryConnectorException( repository, "Blocked mirror for repositories: "
122                        + repository.getMirroredRepositories() );
123            }
124        }
125
126        RemoteRepositoryFilter filter = remoteRepositoryFilterManager.getRemoteRepositoryFilter( session );
127
128        PrioritizedComponents<RepositoryConnectorFactory> factories = new PrioritizedComponents<>( session );
129        for ( RepositoryConnectorFactory factory : this.connectorFactories )
130        {
131            factories.add( factory, factory.getPriority() );
132        }
133
134        List<NoRepositoryConnectorException> errors = new ArrayList<>();
135        for ( PrioritizedComponent<RepositoryConnectorFactory> factory : factories.getEnabled() )
136        {
137            try
138            {
139                RepositoryConnector connector = factory.getComponent().newInstance( session, repository );
140
141                if ( LOGGER.isDebugEnabled() )
142                {
143                    StringBuilder buffer = new StringBuilder( 256 );
144                    buffer.append( "Using connector " ).append( connector.getClass().getSimpleName() );
145                    Utils.appendClassLoader( buffer, connector );
146                    buffer.append( " with priority " ).append( factory.getPriority() );
147                    buffer.append( " for " ).append( repository.getUrl() );
148
149                    Authentication auth = repository.getAuthentication();
150                    if ( auth != null )
151                    {
152                        buffer.append( " with " ).append( auth );
153                    }
154
155                    Proxy proxy = repository.getProxy();
156                    if ( proxy != null )
157                    {
158                        buffer.append( " via " ).append( proxy.getHost() ).append( ':' ).append( proxy.getPort() );
159
160                        auth = proxy.getAuthentication();
161                        if ( auth != null )
162                        {
163                            buffer.append( " with " ).append( auth );
164                        }
165                    }
166
167                    LOGGER.debug( buffer.toString() );
168                }
169
170                if ( filter != null )
171                {
172                    return new FilteringRepositoryConnector(
173                            repository,
174                            connector,
175                            filter
176                    );
177                }
178                else
179                {
180                    return connector;
181                }
182            }
183            catch ( NoRepositoryConnectorException e )
184            {
185                // continue and try next factory
186                errors.add( e );
187            }
188        }
189        if ( LOGGER.isDebugEnabled() && errors.size() > 1 )
190        {
191            for ( Exception e : errors )
192            {
193                LOGGER.debug( "Could not obtain connector factory for {}", repository, e );
194            }
195        }
196
197        StringBuilder buffer = new StringBuilder( 256 );
198        if ( factories.isEmpty() )
199        {
200            buffer.append( "No connector factories available" );
201        }
202        else
203        {
204            buffer.append( "Cannot access " ).append( repository.getUrl() );
205            buffer.append( " with type " ).append( repository.getContentType() );
206            buffer.append( " using the available connector factories: " );
207            factories.list( buffer );
208        }
209
210        throw new NoRepositoryConnectorException( repository, buffer.toString(), errors.size() == 1 ? errors.get( 0 )
211                        : null );
212    }
213
214}