001package org.eclipse.aether.internal.impl.synccontext;
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.Objects;
023
024import javax.annotation.PreDestroy;
025import javax.inject.Inject;
026import javax.inject.Named;
027import javax.inject.Singleton;
028
029import org.eclipse.aether.RepositorySystemSession;
030import org.eclipse.aether.SyncContext;
031import org.eclipse.aether.internal.impl.synccontext.named.NamedLockFactoryAdapter;
032import org.eclipse.aether.spi.locator.Service;
033import org.eclipse.aether.spi.locator.ServiceLocator;
034import org.eclipse.aether.spi.synccontext.SyncContextFactory;
035
036import static java.util.Objects.requireNonNull;
037
038/**
039 * Default {@link SyncContextFactory} implementation that uses named locks.
040 */
041@Singleton
042@Named
043public final class DefaultSyncContextFactory
044        implements SyncContextFactory, Service
045{
046    private NamedLockFactoryAdapter namedLockFactoryAdapter;
047
048    /**
049     * Constructor used with DI, where factories are injected and selected based on key.
050     */
051    @Inject
052    public DefaultSyncContextFactory( final NamedLockFactorySelector selector )
053    {
054        this.namedLockFactoryAdapter = new NamedLockFactoryAdapter(
055            selector.getSelectedNameMapper(),
056            selector.getSelectedNamedLockFactory(),
057            NamedLockFactorySelector.TIME,
058            NamedLockFactorySelector.TIME_UNIT
059        );
060    }
061
062    public DefaultSyncContextFactory()
063    {
064        // ctor for ServiceLoader
065    }
066
067    @Override
068    public void initService( final ServiceLocator locator )
069    {
070        NamedLockFactorySelector selector = Objects.requireNonNull(
071            locator.getService( NamedLockFactorySelector.class ) );
072        this.namedLockFactoryAdapter = new NamedLockFactoryAdapter(
073            selector.getSelectedNameMapper(),
074            selector.getSelectedNamedLockFactory(),
075            NamedLockFactorySelector.TIME,
076            NamedLockFactorySelector.TIME_UNIT
077        );
078    }
079
080    @Override
081    public SyncContext newInstance( final RepositorySystemSession session, final boolean shared )
082    {
083        requireNonNull( session, "session cannot be null" );
084        return namedLockFactoryAdapter.newInstance( session, shared );
085    }
086
087    @PreDestroy
088    public void shutdown()
089    {
090        namedLockFactoryAdapter.shutdown();
091    }
092}