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 java.util.Set;
026
027import javax.inject.Inject;
028import javax.inject.Named;
029
030import org.eclipse.aether.RepositorySystemSession;
031import org.eclipse.aether.impl.RepositoryConnectorProvider;
032import org.eclipse.aether.repository.Authentication;
033import org.eclipse.aether.repository.Proxy;
034import org.eclipse.aether.repository.RemoteRepository;
035import org.eclipse.aether.spi.connector.RepositoryConnector;
036import org.eclipse.aether.spi.connector.RepositoryConnectorFactory;
037import org.eclipse.aether.spi.locator.Service;
038import org.eclipse.aether.spi.locator.ServiceLocator;
039import org.eclipse.aether.spi.log.Logger;
040import org.eclipse.aether.spi.log.LoggerFactory;
041import org.eclipse.aether.spi.log.NullLoggerFactory;
042import org.eclipse.aether.transfer.NoRepositoryConnectorException;
043
044/**
045 */
046@Named
047public class DefaultRepositoryConnectorProvider
048    implements RepositoryConnectorProvider, Service
049{
050
051    private Logger logger = NullLoggerFactory.LOGGER;
052
053    private Collection<RepositoryConnectorFactory> connectorFactories = new ArrayList<RepositoryConnectorFactory>();
054
055    public DefaultRepositoryConnectorProvider()
056    {
057        // enables default constructor
058    }
059
060    @Inject
061    DefaultRepositoryConnectorProvider( Set<RepositoryConnectorFactory> connectorFactories, LoggerFactory loggerFactory )
062    {
063        setRepositoryConnectorFactories( connectorFactories );
064        setLoggerFactory( loggerFactory );
065    }
066
067    public void initService( ServiceLocator locator )
068    {
069        setLoggerFactory( locator.getService( LoggerFactory.class ) );
070        connectorFactories = locator.getServices( RepositoryConnectorFactory.class );
071    }
072
073    public DefaultRepositoryConnectorProvider setLoggerFactory( LoggerFactory loggerFactory )
074    {
075        this.logger = NullLoggerFactory.getSafeLogger( loggerFactory, getClass() );
076        return this;
077    }
078
079    public DefaultRepositoryConnectorProvider addRepositoryConnectorFactory( RepositoryConnectorFactory factory )
080    {
081        if ( factory == null )
082        {
083            throw new IllegalArgumentException( "repository connector factory has not been specified" );
084        }
085        connectorFactories.add( factory );
086        return this;
087    }
088
089    public DefaultRepositoryConnectorProvider setRepositoryConnectorFactories( Collection<RepositoryConnectorFactory> factories )
090    {
091        if ( factories == null )
092        {
093            this.connectorFactories = new ArrayList<RepositoryConnectorFactory>();
094        }
095        else
096        {
097            this.connectorFactories = factories;
098        }
099        return this;
100    }
101
102    public RepositoryConnector newRepositoryConnector( RepositorySystemSession session, RemoteRepository repository )
103        throws NoRepositoryConnectorException
104    {
105        if ( repository == null )
106        {
107            throw new IllegalArgumentException( "remote repository has not been specified" );
108        }
109
110        PrioritizedComponents<RepositoryConnectorFactory> factories =
111            new PrioritizedComponents<RepositoryConnectorFactory>( session );
112        for ( RepositoryConnectorFactory factory : this.connectorFactories )
113        {
114            factories.add( factory, factory.getPriority() );
115        }
116
117        List<NoRepositoryConnectorException> errors = new ArrayList<NoRepositoryConnectorException>();
118        for ( PrioritizedComponent<RepositoryConnectorFactory> factory : factories.getEnabled() )
119        {
120            try
121            {
122                RepositoryConnector connector = factory.getComponent().newInstance( session, repository );
123
124                if ( logger.isDebugEnabled() )
125                {
126                    StringBuilder buffer = new StringBuilder( 256 );
127                    buffer.append( "Using connector " ).append( connector.getClass().getSimpleName() );
128                    Utils.appendClassLoader( buffer, connector );
129                    buffer.append( " with priority " ).append( factory.getPriority() );
130                    buffer.append( " for " ).append( repository.getUrl() );
131
132                    Authentication auth = repository.getAuthentication();
133                    if ( auth != null )
134                    {
135                        buffer.append( " with " ).append( auth );
136                    }
137
138                    Proxy proxy = repository.getProxy();
139                    if ( proxy != null )
140                    {
141                        buffer.append( " via " ).append( proxy.getHost() ).append( ':' ).append( proxy.getPort() );
142
143                        auth = proxy.getAuthentication();
144                        if ( auth != null )
145                        {
146                            buffer.append( " with " ).append( auth );
147                        }
148                    }
149
150                    logger.debug( buffer.toString() );
151                }
152
153                return connector;
154            }
155            catch ( NoRepositoryConnectorException e )
156            {
157                // continue and try next factory
158                errors.add( e );
159            }
160        }
161        if ( logger.isDebugEnabled() && errors.size() > 1 )
162        {
163            String msg = "Could not obtain connector factory for " + repository;
164            for ( Exception e : errors )
165            {
166                logger.debug( msg, e );
167            }
168        }
169
170        StringBuilder buffer = new StringBuilder( 256 );
171        if ( factories.isEmpty() )
172        {
173            buffer.append( "No connector factories available" );
174        }
175        else
176        {
177            buffer.append( "Cannot access " ).append( repository.getUrl() );
178            buffer.append( " with type " ).append( repository.getContentType() );
179            buffer.append( " using the available connector factories: " );
180            factories.list( buffer );
181        }
182
183        throw new NoRepositoryConnectorException( repository, buffer.toString(), errors.size() == 1 ? errors.get( 0 )
184                        : null );
185    }
186
187}