/*
* Copyright 2002-2013 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
*
* http://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.context.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
Indicates whether a bean is to be lazily initialized.
May be used on any class directly or indirectly annotated with @Component or on methods annotated with @Bean.
If this annotation is not present on a @Component or @Bean definition, eager initialization will occur. If present and set to true, the @Bean or @Component will not be initialized until referenced by another bean or explicitly retrieved from the enclosing
BeanFactory. If present and set to false, the bean will be instantiated on startup by bean factories that perform eager initialization of singletons.
If Lazy is present on a @Configuration class, this indicates that all @Bean methods within that @Configuration should be lazily initialized. If @Lazy is present and false on a @Bean method within a @Lazy-annotated @Configuration class, this indicates overriding the 'default lazy' behavior and that the bean should be eagerly initialized.
In addition to its role for component initialization, this annotation may also be placed on injection points marked with Autowired or Inject: In that context, it leads to the creation of a lazy-resolution proxy for all affected dependencies, as an alternative to using ObjectFactory or Provider.
Author: Chris Beams, Juergen Hoeller See Also: Since: 3.0
/**
* Indicates whether a bean is to be lazily initialized.
*
* <p>May be used on any class directly or indirectly annotated with {@link
* org.springframework.stereotype.Component @Component} or on methods annotated with
* {@link Bean @Bean}.
*
* <p>If this annotation is not present on a {@code @Component} or {@code @Bean} definition,
* eager initialization will occur. If present and set to {@code true}, the {@code @Bean} or
* {@code @Component} will not be initialized until referenced by another bean or explicitly
* retrieved from the enclosing {@link org.springframework.beans.factory.BeanFactory
* BeanFactory}. If present and set to {@code false}, the bean will be instantiated on
* startup by bean factories that perform eager initialization of singletons.
*
* <p>If Lazy is present on a {@link Configuration @Configuration} class, this
* indicates that all {@code @Bean} methods within that {@code @Configuration}
* should be lazily initialized. If {@code @Lazy} is present and false on a {@code @Bean}
* method within a {@code @Lazy}-annotated {@code @Configuration} class, this indicates
* overriding the 'default lazy' behavior and that the bean should be eagerly initialized.
*
* <p>In addition to its role for component initialization, this annotation may also be placed
* on injection points marked with {@link org.springframework.beans.factory.annotation.Autowired}
* or {@link javax.inject.Inject}: In that context, it leads to the creation of a
* lazy-resolution proxy for all affected dependencies, as an alternative to using
* {@link org.springframework.beans.factory.ObjectFactory} or {@link javax.inject.Provider}.
*
* @author Chris Beams
* @author Juergen Hoeller
* @since 3.0
* @see Primary
* @see Bean
* @see Configuration
* @see org.springframework.stereotype.Component
*/
@Target({ElementType.TYPE, ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Lazy {
Whether lazy initialization should occur.
/**
* Whether lazy initialization should occur.
*/
boolean value() default true;
}