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.LocalRepositoryProvider;
032import org.eclipse.aether.repository.LocalRepository;
033import org.eclipse.aether.repository.LocalRepositoryManager;
034import org.eclipse.aether.repository.NoLocalRepositoryManagerException;
035import org.eclipse.aether.spi.localrepo.LocalRepositoryManagerFactory;
036import org.eclipse.aether.spi.locator.Service;
037import org.eclipse.aether.spi.locator.ServiceLocator;
038import org.eclipse.aether.spi.log.Logger;
039import org.eclipse.aether.spi.log.LoggerFactory;
040import org.eclipse.aether.spi.log.NullLoggerFactory;
041
042/**
043 */
044@Named
045public class DefaultLocalRepositoryProvider
046    implements LocalRepositoryProvider, Service
047{
048
049    private Logger logger = NullLoggerFactory.LOGGER;
050
051    private Collection<LocalRepositoryManagerFactory> managerFactories = new ArrayList<LocalRepositoryManagerFactory>();
052
053    public DefaultLocalRepositoryProvider()
054    {
055        // enables default constructor
056    }
057
058    @Inject
059    DefaultLocalRepositoryProvider( Set<LocalRepositoryManagerFactory> factories, LoggerFactory loggerFactory )
060    {
061        setLocalRepositoryManagerFactories( factories );
062        setLoggerFactory( loggerFactory );
063    }
064
065    public void initService( ServiceLocator locator )
066    {
067        setLoggerFactory( locator.getService( LoggerFactory.class ) );
068        setLocalRepositoryManagerFactories( locator.getServices( LocalRepositoryManagerFactory.class ) );
069    }
070
071    public DefaultLocalRepositoryProvider setLoggerFactory( LoggerFactory loggerFactory )
072    {
073        this.logger = NullLoggerFactory.getSafeLogger( loggerFactory, getClass() );
074        return this;
075    }
076
077    public DefaultLocalRepositoryProvider addLocalRepositoryManagerFactory( LocalRepositoryManagerFactory factory )
078    {
079        if ( factory == null )
080        {
081            throw new IllegalArgumentException( "Local repository manager factory has not been specified." );
082        }
083        managerFactories.add( factory );
084        return this;
085    }
086
087    public DefaultLocalRepositoryProvider setLocalRepositoryManagerFactories( Collection<LocalRepositoryManagerFactory> factories )
088    {
089        if ( factories == null )
090        {
091            managerFactories = new ArrayList<LocalRepositoryManagerFactory>( 2 );
092        }
093        else
094        {
095            managerFactories = factories;
096        }
097        return this;
098    }
099
100    public LocalRepositoryManager newLocalRepositoryManager( RepositorySystemSession session, LocalRepository repository )
101        throws NoLocalRepositoryManagerException
102    {
103        PrioritizedComponents<LocalRepositoryManagerFactory> factories =
104            new PrioritizedComponents<LocalRepositoryManagerFactory>( session );
105        for ( LocalRepositoryManagerFactory factory : this.managerFactories )
106        {
107            factories.add( factory, factory.getPriority() );
108        }
109
110        List<NoLocalRepositoryManagerException> errors = new ArrayList<NoLocalRepositoryManagerException>();
111        for ( PrioritizedComponent<LocalRepositoryManagerFactory> factory : factories.getEnabled() )
112        {
113            try
114            {
115                LocalRepositoryManager manager = factory.getComponent().newInstance( session, repository );
116
117                if ( logger.isDebugEnabled() )
118                {
119                    StringBuilder buffer = new StringBuilder( 256 );
120                    buffer.append( "Using manager " ).append( manager.getClass().getSimpleName() );
121                    Utils.appendClassLoader( buffer, manager );
122                    buffer.append( " with priority " ).append( factory.getPriority() );
123                    buffer.append( " for " ).append( repository.getBasedir() );
124
125                    logger.debug( buffer.toString() );
126                }
127
128                return manager;
129            }
130            catch ( NoLocalRepositoryManagerException e )
131            {
132                // continue and try next factory
133                errors.add( e );
134            }
135        }
136        if ( logger.isDebugEnabled() && errors.size() > 1 )
137        {
138            String msg = "Could not obtain local repository manager for " + repository;
139            for ( Exception e : errors )
140            {
141                logger.debug( msg, e );
142            }
143        }
144
145        StringBuilder buffer = new StringBuilder( 256 );
146        if ( factories.isEmpty() )
147        {
148            buffer.append( "No local repository managers registered" );
149        }
150        else
151        {
152            buffer.append( "Cannot access " ).append( repository.getBasedir() );
153            buffer.append( " with type " ).append( repository.getContentType() );
154            buffer.append( " using the available factories " );
155            factories.list( buffer );
156        }
157
158        throw new NoLocalRepositoryManagerException( repository, buffer.toString(), errors.size() == 1 ? errors.get( 0 )
159                        : null );
160    }
161
162}