spring SingletonMetadataAwareAspectInstanceFactory 源码
spring SingletonMetadataAwareAspectInstanceFactory 代码
文件路径：/spring-aop/src/main/java/org/springframework/aop/aspectj/annotation/SingletonMetadataAwareAspectInstanceFactory.java
/*
* Copyright 2002-2016 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.aop.aspectj.annotation;
import java.io.Serializable;
import org.springframework.aop.aspectj.SingletonAspectInstanceFactory;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.OrderUtils;
/**
* Implementation of {@link MetadataAwareAspectInstanceFactory} that is backed
* by a specified singleton object, returning the same instance for every
* {@link #getAspectInstance()} call.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @since 2.0
* @see SimpleMetadataAwareAspectInstanceFactory
*/
@SuppressWarnings("serial")
public class SingletonMetadataAwareAspectInstanceFactory extends SingletonAspectInstanceFactory
implements MetadataAwareAspectInstanceFactory, Serializable {
private final AspectMetadata metadata;
/**
* Create a new SingletonMetadataAwareAspectInstanceFactory for the given aspect.
* @param aspectInstance the singleton aspect instance
* @param aspectName the name of the aspect
*/
public SingletonMetadataAwareAspectInstanceFactory(Object aspectInstance, String aspectName) {
super(aspectInstance);
this.metadata = new AspectMetadata(aspectInstance.getClass(), aspectName);
}
@Override
public final AspectMetadata getAspectMetadata() {
return this.metadata;
}
@Override
public Object getAspectCreationMutex() {
return this;
}
@Override
protected int getOrderForAspectClass(Class<?> aspectClass) {
return OrderUtils.getOrder(aspectClass, Ordered.LOWEST_PRECEDENCE);
}
}
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