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.impl.RepositorySystemLifecycle; 029import org.eclipse.aether.internal.impl.synccontext.named.NamedLockFactoryAdapter; 030import org.eclipse.aether.internal.impl.synccontext.named.NamedLockFactorySelector; 031import org.eclipse.aether.internal.impl.synccontext.named.ParameterizedNamedLockFactorySelector; 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 RepositorySystemLifecycle repositorySystemLifecycle, 053 final NamedLockFactorySelector selector ) 054 { 055 repositorySystemLifecycle.addOnSystemEndedHandler( this::shutDownAdapter ); 056 this.namedLockFactoryAdapter = 057 new NamedLockFactoryAdapter( selector.getSelectedNameMapper(), selector.getSelectedNamedLockFactory() ); 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 locator.getService( RepositorySystemLifecycle.class ).addOnSystemEndedHandler( this::shutDownAdapter ); 075 NamedLockFactorySelector selector = new ParameterizedNamedLockFactorySelector(); 076 this.namedLockFactoryAdapter = 077 new NamedLockFactoryAdapter( selector.getSelectedNameMapper(), selector.getSelectedNamedLockFactory() ); 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 private void shutDownAdapter() 088 { 089 if ( namedLockFactoryAdapter != null ) 090 { 091 namedLockFactoryAdapter.shutdown(); 092 } 093 } 094}