001/* 002 * Copyright 2002-2018 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.scheduling.annotation; 018 019import org.springframework.context.annotation.AdviceMode; 020import org.springframework.context.annotation.AdviceModeImportSelector; 021import org.springframework.lang.Nullable; 022 023/** 024 * Selects which implementation of {@link AbstractAsyncConfiguration} should 025 * be used based on the value of {@link EnableAsync#mode} on the importing 026 * {@code @Configuration} class. 027 * 028 * @author Chris Beams 029 * @author Juergen Hoeller 030 * @since 3.1 031 * @see EnableAsync 032 * @see ProxyAsyncConfiguration 033 */ 034public class AsyncConfigurationSelector extends AdviceModeImportSelector<EnableAsync> { 035 036 private static final String ASYNC_EXECUTION_ASPECT_CONFIGURATION_CLASS_NAME = 037 "org.springframework.scheduling.aspectj.AspectJAsyncConfiguration"; 038 039 040 /** 041 * Returns {@link ProxyAsyncConfiguration} or {@code AspectJAsyncConfiguration} 042 * for {@code PROXY} and {@code ASPECTJ} values of {@link EnableAsync#mode()}, 043 * respectively. 044 */ 045 @Override 046 @Nullable 047 public String[] selectImports(AdviceMode adviceMode) { 048 switch (adviceMode) { 049 case PROXY: 050 return new String[] {ProxyAsyncConfiguration.class.getName()}; 051 case ASPECTJ: 052 return new String[] {ASYNC_EXECUTION_ASPECT_CONFIGURATION_CLASS_NAME}; 053 default: 054 return null; 055 } 056 } 057 058}