001package org.eclipse.aether.named.redisson;
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 org.eclipse.aether.named.support.NamedLockFactorySupport;
023import org.redisson.Redisson;
024import org.redisson.api.RedissonClient;
025import org.redisson.config.Config;
026
027import java.io.IOException;
028import java.io.InputStream;
029import java.nio.file.Files;
030import java.nio.file.Path;
031import java.nio.file.Paths;
032
033/**
034 * Support class for factories using {@link RedissonClient}.
035 */
036public abstract class RedissonNamedLockFactorySupport
037    extends NamedLockFactorySupport
038{
039    protected static final String NAME_PREFIX = "maven:resolver:";
040
041    private static final String DEFAULT_CONFIG_FILE_NAME = "maven-resolver-redisson.yaml";
042
043    private static final String DEFAULT_REDIS_ADDRESS = "redis://localhost:6379";
044
045    private static final String DEFAULT_CLIENT_NAME = "maven-resolver";
046
047    private static final String CONFIG_PROP_CONFIG_FILE = "aether.syncContext.named.redisson.configFile";
048
049    protected final RedissonClient redissonClient;
050
051    public RedissonNamedLockFactorySupport()
052    {
053        this.redissonClient = createRedissonClient();
054    }
055
056    @Override
057    public void shutdown()
058    {
059        logger.trace( "Shutting down Redisson client with id '{}'", redissonClient.getId() );
060        redissonClient.shutdown();
061    }
062
063    private RedissonClient createRedissonClient()
064    {
065        Path configFilePath = null;
066
067        String configFile = System.getProperty( CONFIG_PROP_CONFIG_FILE );
068        if ( configFile != null && !configFile.isEmpty() )
069        {
070            configFilePath = Paths.get( configFile );
071            if ( Files.notExists( configFilePath ) )
072            {
073                throw new IllegalArgumentException( "The specified Redisson config file does not exist: "
074                        + configFilePath );
075            }
076        }
077
078        if ( configFilePath == null )
079        {
080            String mavenConf = System.getProperty( "maven.conf" );
081            if ( mavenConf != null && !mavenConf.isEmpty() )
082            {
083                configFilePath = Paths.get( mavenConf, DEFAULT_CONFIG_FILE_NAME );
084                if ( Files.notExists( configFilePath ) )
085                {
086                    configFilePath = null;
087                }
088            }
089        }
090
091        Config config;
092
093        if ( configFilePath != null )
094        {
095            logger.trace( "Reading Redisson config file from '{}'", configFilePath );
096            try ( InputStream is = Files.newInputStream( configFilePath ) )
097            {
098                config = Config.fromYAML( is );
099            }
100            catch ( IOException e )
101            {
102                throw new IllegalStateException( "Failed to read Redisson config file: " + configFilePath, e );
103            }
104        }
105        else
106        {
107            config = new Config();
108            config.useSingleServer()
109                    .setAddress( DEFAULT_REDIS_ADDRESS )
110                    .setClientName( DEFAULT_CLIENT_NAME );
111        }
112
113        RedissonClient redissonClient = Redisson.create( config );
114        logger.trace( "Created Redisson client with id '{}'", redissonClient.getId() );
115
116        return redissonClient;
117    }
118}