spring AbstractCompositeHealthContributorConfiguration 源码
springboot AbstractCompositeHealthContributorConfiguration 代码
文件路径：/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/AbstractCompositeHealthContributorConfiguration.java
/*
* Copyright 2012-2019 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.boot.actuate.autoconfigure.health;
import java.lang.reflect.Constructor;
import java.util.Map;
import org.springframework.beans.BeanUtils;
import org.springframework.core.ResolvableType;
import org.springframework.util.Assert;
/**
* Base class for health contributor configurations that can combine source beans into a
* composite.
*
* @param <C> the contributor type
* @param <I> the health indicator type
* @param <B> the bean type
* @author Stephane Nicoll
* @author Phillip Webb
* @since 2.2.0
*/
public abstract class AbstractCompositeHealthContributorConfiguration<C, I extends C, B> {
private final Class<?> indicatorType;
private final Class<?> beanType;
AbstractCompositeHealthContributorConfiguration() {
ResolvableType type = ResolvableType.forClass(AbstractCompositeHealthContributorConfiguration.class,
getClass());
this.indicatorType = type.resolveGeneric(1);
this.beanType = type.resolveGeneric(2);
}
protected final C createContributor(Map<String, B> beans) {
Assert.notEmpty(beans, "Beans must not be empty");
if (beans.size() == 1) {
return createIndicator(beans.values().iterator().next());
}
return createComposite(beans);
}
protected abstract C createComposite(Map<String, B> beans);
@SuppressWarnings("unchecked")
protected I createIndicator(B bean) {
try {
Constructor<I> constructor = (Constructor<I>) this.indicatorType.getDeclaredConstructor(this.beanType);
return BeanUtils.instantiateClass(constructor, bean);
}
catch (Exception ex) {
throw new IllegalStateException(
"Unable to create health indicator " + this.indicatorType + " for bean type " + this.beanType, ex);
}
}
}
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- 本文标签： Java Spring Spring Boot
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