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        LOGGER.debug("Selecting LocalRepositoryManager for {}", repository);
069
070        List<NoLocalRepositoryManagerException> errors = new ArrayList<>();
071        for (PrioritizedComponent<LocalRepositoryManagerFactory> factory : factories.getEnabled()) {
072            try {
073                LocalRepositoryManager manager = factory.getComponent().newInstance(session, repository);
074
075                if (LOGGER.isDebugEnabled()) {
076                    StringBuilder buffer = new StringBuilder(256);
077                    buffer.append("Using manager ").append(manager.getClass().getSimpleName());
078                    Utils.appendClassLoader(buffer, manager);
079                    buffer.append(" with priority ").append(factory.getPriority());
080                    buffer.append(" for ").append(repository.getBasePath());
081
082                    LOGGER.debug(buffer.toString());
083                }
084
085                return manager;
086            } catch (NoLocalRepositoryManagerException e) {
087                // continue and try next factory
088                if (LOGGER.isTraceEnabled()) {
089                    LOGGER.trace(
090                            "LRM factory {} did not provide LRM for {}",
091                            factory.getComponent().getClass(),
092                            repository,
093                            e);
094                } else {
095                    LOGGER.debug(
096                            "LRM factory {} did not provide LRM for {}: {}",
097                            factory.getComponent().getClass(),
098                            repository,
099                            e.getMessage());
100                }
101                errors.add(e);
102            }
103        }
104
105        StringBuilder buffer = new StringBuilder(256);
106        if (factories.isEmpty()) {
107            buffer.append("No local repository managers registered");
108        } else {
109            buffer.append("Cannot access ").append(repository.getBasePath());
110            buffer.append(" with type ").append(repository.getContentType());
111            buffer.append(" using the available factories ");
112            factories.list(buffer);
113        }
114
115        // create exception: if one error, make it cause
116        NoLocalRepositoryManagerException ex = new NoLocalRepositoryManagerException(
117                repository, buffer.toString(), errors.size() == 1 ? errors.get(0) : null);
118        // if more errors, make them all suppressed
119        if (errors.size() > 1) {
120            errors.forEach(ex::addSuppressed);
121        }
122        throw ex;
123    }
124}