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