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;
030
031import org.eclipse.aether.RepositorySystemSession;
032import org.eclipse.aether.impl.LocalRepositoryProvider;
033import org.eclipse.aether.repository.LocalRepository;
034import org.eclipse.aether.repository.LocalRepositoryManager;
035import org.eclipse.aether.repository.NoLocalRepositoryManagerException;
036import org.eclipse.aether.spi.localrepo.LocalRepositoryManagerFactory;
037import org.eclipse.aether.spi.locator.Service;
038import org.eclipse.aether.spi.locator.ServiceLocator;
039import org.slf4j.Logger;
040import org.slf4j.LoggerFactory;
041
042/**
043 */
044@Named
045public class DefaultLocalRepositoryProvider
046    implements LocalRepositoryProvider, Service
047{
048
049    private static final Logger LOGGER = LoggerFactory.getLogger( DefaultLocalRepositoryProvider.class );
050
051    private Collection<LocalRepositoryManagerFactory> managerFactories = new ArrayList<>();
052
053    public DefaultLocalRepositoryProvider()
054    {
055        // enables default constructor
056    }
057
058    @Inject
059    DefaultLocalRepositoryProvider( Set<LocalRepositoryManagerFactory> factories )
060    {
061        setLocalRepositoryManagerFactories( factories );
062    }
063
064    public void initService( ServiceLocator locator )
065    {
066        setLocalRepositoryManagerFactories( locator.getServices( LocalRepositoryManagerFactory.class ) );
067    }
068
069    public DefaultLocalRepositoryProvider addLocalRepositoryManagerFactory( LocalRepositoryManagerFactory factory )
070    {
071        managerFactories.add( requireNonNull( factory, "local repository manager factory cannot be null" ) );
072        return this;
073    }
074
075    public DefaultLocalRepositoryProvider setLocalRepositoryManagerFactories(
076            Collection<LocalRepositoryManagerFactory> factories )
077    {
078        if ( factories == null )
079        {
080            managerFactories = new ArrayList<>( 2 );
081        }
082        else
083        {
084            managerFactories = factories;
085        }
086        return this;
087    }
088
089    public LocalRepositoryManager newLocalRepositoryManager( RepositorySystemSession session,
090                                                             LocalRepository repository )
091        throws NoLocalRepositoryManagerException
092    {
093        PrioritizedComponents<LocalRepositoryManagerFactory> factories = new PrioritizedComponents<>( session );
094        for ( LocalRepositoryManagerFactory factory : this.managerFactories )
095        {
096            factories.add( factory, factory.getPriority() );
097        }
098
099        List<NoLocalRepositoryManagerException> errors = new ArrayList<>();
100        for ( PrioritizedComponent<LocalRepositoryManagerFactory> factory : factories.getEnabled() )
101        {
102            try
103            {
104                LocalRepositoryManager manager = factory.getComponent().newInstance( session, repository );
105
106                if ( LOGGER.isDebugEnabled() )
107                {
108                    StringBuilder buffer = new StringBuilder( 256 );
109                    buffer.append( "Using manager " ).append( manager.getClass().getSimpleName() );
110                    Utils.appendClassLoader( buffer, manager );
111                    buffer.append( " with priority " ).append( factory.getPriority() );
112                    buffer.append( " for " ).append( repository.getBasedir() );
113
114                    LOGGER.debug( buffer.toString() );
115                }
116
117                return manager;
118            }
119            catch ( NoLocalRepositoryManagerException e )
120            {
121                // continue and try next factory
122                errors.add( e );
123            }
124        }
125        if ( LOGGER.isDebugEnabled() && errors.size() > 1 )
126        {
127            String msg = "Could not obtain local repository manager for " + repository;
128            for ( Exception e : errors )
129            {
130                LOGGER.debug( msg, e );
131            }
132        }
133
134        StringBuilder buffer = new StringBuilder( 256 );
135        if ( factories.isEmpty() )
136        {
137            buffer.append( "No local repository managers registered" );
138        }
139        else
140        {
141            buffer.append( "Cannot access " ).append( repository.getBasedir() );
142            buffer.append( " with type " ).append( repository.getContentType() );
143            buffer.append( " using the available factories " );
144            factories.list( buffer );
145        }
146
147        throw new NoLocalRepositoryManagerException( repository, buffer.toString(), errors.size() == 1 ? errors.get( 0 )
148                        : null );
149    }
150
151}