Support programmatic lazy-int exclusion
Allow the `LazyInitializationBeanFactoryPostProcessor` to skip setting lazy-init based on a programmatic callback. This feature allows downstream projects to deal with edge-cases in which it is not easy to support lazy-loading (such as in DSLs that dynamically create additional beans). See gh-16615pull/18371/head
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/*
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* Copyright 2012-2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.boot;
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import java.util.function.Predicate;
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/**
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* This predicate can be implemented by downstream projects to customize the behavior of
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* the {@link LazyInitializationBeanFactoryPostProcessor}.
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*
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* <P>
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* There are edge cases (such as in DSLs that dynamically create additional beans) in
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* which it is not easy to explicitly exclude a class from the lazy-loading behavior.
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* Adding an instance of this predicate to the application context can be used for these
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* edge cases.
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* <P>
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* Returning "true" from this predicate will exclude a class from the lazy-loading
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* process.
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*
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* <P>
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* Example:
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* <P>
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* <pre>
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* {@code
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*
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* @Bean
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* public static EagerLoadingBeanDefinitionPredicate eagerLoadingBeanDefinitionPredicate() {
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* return IntegrationFlow.class::isAssignableFrom;
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* }}</pre>
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*
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* WARNING: Beans of this type will be instantiated very early in the spring application
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* life cycle.
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*
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* @author Tyler Van Gorder
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* @since 2.2.0
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*/
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public interface EagerLoadingBeanDefinitionPredicate extends Predicate<Class<?>> {
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}
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