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 javax.inject.Inject; 023import javax.inject.Named; 024import javax.inject.Singleton; 025 026import org.eclipse.aether.RepositorySystemSession; 027import org.eclipse.aether.SyncContext; 028import org.eclipse.aether.internal.impl.synccontext.named.NamedLockFactoryAdapter; 029import org.eclipse.aether.internal.impl.synccontext.named.NamedLockFactoryAdapterFactory; 030import org.eclipse.aether.spi.locator.Service; 031import org.eclipse.aether.spi.locator.ServiceLocator; 032import org.eclipse.aether.spi.synccontext.SyncContextFactory; 033 034import static java.util.Objects.requireNonNull; 035 036/** 037 * Default {@link SyncContextFactory} implementation that uses named locks. 038 * <p> 039 * The implementation relies fully on {@link NamedLockFactoryAdapterFactory} and all it does is just "stuff" the 040 * adapter instance into session, hence factory is called only when given session has no instance created. 041 */ 042@Singleton 043@Named 044public final class DefaultSyncContextFactory 045 implements SyncContextFactory, Service 046{ 047 private static final String ADAPTER_KEY = DefaultSyncContextFactory.class.getName() + ".adapter"; 048 049 private NamedLockFactoryAdapterFactory namedLockFactoryAdapterFactory; 050 051 /** 052 * Constructor used with DI, where factories are injected and selected based on key. 053 */ 054 @Inject 055 public DefaultSyncContextFactory( final NamedLockFactoryAdapterFactory namedLockFactoryAdapterFactory ) 056 { 057 this.namedLockFactoryAdapterFactory = requireNonNull( namedLockFactoryAdapterFactory ); 058 } 059 060 /** 061 * ServiceLocator default ctor. 062 * 063 * @deprecated Will be removed once ServiceLocator removed. 064 */ 065 @Deprecated 066 public DefaultSyncContextFactory() 067 { 068 // ctor for ServiceLoader 069 } 070 071 @Override 072 public void initService( final ServiceLocator locator ) 073 { 074 this.namedLockFactoryAdapterFactory = requireNonNull( 075 locator.getService( NamedLockFactoryAdapterFactory.class ) ); 076 } 077 078 @Override 079 public SyncContext newInstance( final RepositorySystemSession session, final boolean shared ) 080 { 081 requireNonNull( session, "session cannot be null" ); 082 NamedLockFactoryAdapter adapter = (NamedLockFactoryAdapter) session.getData().computeIfAbsent( 083 ADAPTER_KEY, () -> namedLockFactoryAdapterFactory.getAdapter( session ) ); 084 return adapter.newInstance( session, shared ); 085 } 086}