| package org.eclipse.aether.internal.impl.synccontext.named; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import org.eclipse.aether.RepositorySystemSession; |
| import org.eclipse.aether.artifact.Artifact; |
| import org.eclipse.aether.metadata.Metadata; |
| import org.eclipse.aether.util.ChecksumUtils; |
| import org.eclipse.aether.util.ConfigUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.inject.Inject; |
| import javax.inject.Named; |
| import javax.inject.Singleton; |
| import java.io.File; |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Map; |
| |
| import static java.util.Objects.requireNonNull; |
| import static java.util.stream.Collectors.toList; |
| |
| /** |
| * Discriminating {@link NameMapper}, that wraps another {@link NameMapper} and adds a "discriminator" as prefix, that |
| * makes lock names unique including the hostname and local repository (by default). The discriminator may be passed |
| * in via {@link RepositorySystemSession} or is automatically calculated based on the local hostname and repository |
| * path. The implementation retains order of collection elements as it got it from |
| * {@link NameMapper#nameLocks(RepositorySystemSession, Collection, Collection)} method. |
| * <p> |
| * The default setup wraps {@link GAVNameMapper}, but manually may be created any instance needed. |
| */ |
| @Singleton |
| @Named( DiscriminatingNameMapper.NAME ) |
| public class DiscriminatingNameMapper implements NameMapper |
| { |
| public static final String NAME = "discriminating"; |
| |
| /** |
| * Configuration property to pass in discriminator |
| */ |
| private static final String CONFIG_PROP_DISCRIMINATOR = "aether.syncContext.named.discriminating.discriminator"; |
| |
| /** |
| * Configuration property to pass in hostname |
| */ |
| private static final String CONFIG_PROP_HOSTNAME = "aether.syncContext.named.discriminating.hostname"; |
| |
| private static final String DEFAULT_DISCRIMINATOR_DIGEST = "da39a3ee5e6b4b0d3255bfef95601890afd80709"; |
| |
| private static final String DEFAULT_HOSTNAME = "localhost"; |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger( DiscriminatingNameMapper.class ); |
| |
| private final NameMapper nameMapper; |
| |
| private final String hostname; |
| |
| @Inject |
| public DiscriminatingNameMapper( @Named( GAVNameMapper.NAME ) final NameMapper nameMapper ) |
| { |
| this.nameMapper = requireNonNull( nameMapper ); |
| this.hostname = getHostname(); |
| } |
| |
| @Override |
| public Collection<String> nameLocks( final RepositorySystemSession session, |
| final Collection<? extends Artifact> artifacts, |
| final Collection<? extends Metadata> metadatas ) |
| { |
| String discriminator = createDiscriminator( session ); |
| return nameMapper.nameLocks( session, artifacts, metadatas ).stream().map( s -> discriminator + ":" + s ) |
| .collect( toList() ); |
| } |
| |
| private String getHostname() |
| { |
| try |
| { |
| return InetAddress.getLocalHost().getHostName(); |
| } |
| catch ( UnknownHostException e ) |
| { |
| LOGGER.warn( "Failed to get hostname, using '{}'", DEFAULT_HOSTNAME, e ); |
| return DEFAULT_HOSTNAME; |
| } |
| } |
| |
| private String createDiscriminator( final RepositorySystemSession session ) |
| { |
| String discriminator = ConfigUtils.getString( session, null, CONFIG_PROP_DISCRIMINATOR ); |
| |
| if ( discriminator == null || discriminator.isEmpty() ) |
| { |
| String hostname = ConfigUtils.getString( session, this.hostname, CONFIG_PROP_HOSTNAME ); |
| File basedir = session.getLocalRepository().getBasedir(); |
| discriminator = hostname + ":" + basedir; |
| try |
| { |
| Map<String, Object> checksums = ChecksumUtils |
| .calc( discriminator.getBytes( StandardCharsets.UTF_8 ), Collections.singletonList( "SHA-1" ) ); |
| Object checksum = checksums.get( "SHA-1" ); |
| |
| if ( checksum instanceof Exception ) |
| { |
| throw (Exception) checksum; |
| } |
| |
| return String.valueOf( checksum ); |
| } |
| catch ( Exception e ) |
| { |
| LOGGER.warn( "Failed to calculate discriminator digest, using '{}'", DEFAULT_DISCRIMINATOR_DIGEST, e ); |
| return DEFAULT_DISCRIMINATOR_DIGEST; |
| } |
| } |
| return discriminator; |
| } |
| } |