001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.eclipse.aether.internal.impl;
020
021import javax.inject.Inject;
022import javax.inject.Named;
023import javax.inject.Singleton;
024
025import java.util.ArrayList;
026import java.util.Collections;
027import java.util.List;
028import java.util.Map;
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.slf4j.Logger;
037import org.slf4j.LoggerFactory;
038
039import static java.util.Objects.requireNonNull;
040
041/**
042 */
043@Singleton
044@Named
045public class DefaultLocalRepositoryProvider implements LocalRepositoryProvider {
046
047    private static final Logger LOGGER = LoggerFactory.getLogger(DefaultLocalRepositoryProvider.class);
048
049    private final Map<String, LocalRepositoryManagerFactory> localRepositoryManagerFactories;
050
051    @Inject
052    public DefaultLocalRepositoryProvider(Map<String, LocalRepositoryManagerFactory> localRepositoryManagerFactories) {
053        this.localRepositoryManagerFactories = Collections.unmodifiableMap(localRepositoryManagerFactories);
054    }
055
056    @Override
057    public LocalRepositoryManager newLocalRepositoryManager(RepositorySystemSession session, LocalRepository repository)
058            throws NoLocalRepositoryManagerException {
059        requireNonNull(session, "session cannot be null");
060        requireNonNull(repository, "repository cannot be null");
061
062        PrioritizedComponents<LocalRepositoryManagerFactory> factories = PrioritizedComponents.reuseOrCreate(
063                session,
064                LocalRepositoryManagerFactory.class,
065                localRepositoryManagerFactories,
066                LocalRepositoryManagerFactory::getPriority);
067
068        List<NoLocalRepositoryManagerException> errors = new ArrayList<>();
069        for (PrioritizedComponent<LocalRepositoryManagerFactory> factory : factories.getEnabled()) {
070            try {
071                LocalRepositoryManager manager = factory.getComponent().newInstance(session, repository);
072
073                if (LOGGER.isDebugEnabled()) {
074                    StringBuilder buffer = new StringBuilder(256);
075                    buffer.append("Using manager ").append(manager.getClass().getSimpleName());
076                    Utils.appendClassLoader(buffer, manager);
077                    buffer.append(" with priority ").append(factory.getPriority());
078                    buffer.append(" for ").append(repository.getBasePath());
079
080                    LOGGER.debug(buffer.toString());
081                }
082
083                return manager;
084            } catch (NoLocalRepositoryManagerException e) {
085                // continue and try next factory
086                LOGGER.debug("Could not obtain local repository manager for {}", repository, e);
087                errors.add(e);
088            }
089        }
090
091        StringBuilder buffer = new StringBuilder(256);
092        if (factories.isEmpty()) {
093            buffer.append("No local repository managers registered");
094        } else {
095            buffer.append("Cannot access ").append(repository.getBasePath());
096            buffer.append(" with type ").append(repository.getContentType());
097            buffer.append(" using the available factories ");
098            factories.list(buffer);
099        }
100
101        // create exception: if one error, make it cause
102        NoLocalRepositoryManagerException ex = new NoLocalRepositoryManagerException(
103                repository, buffer.toString(), errors.size() == 1 ? errors.get(0) : null);
104        // if more errors, make them all suppressed
105        if (errors.size() > 1) {
106            errors.forEach(ex::addSuppressed);
107        }
108        throw ex;
109    }
110}