com.alibaba.nacos.shaded.javax.annotation.PostConstruct Maven / Gradle / Ivy
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package com.alibaba.nacos.shaded.javax.annotation;
import java.lang.annotation.*;
import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;
/**
* The PostConstruct annotation is used on a method that
* needs to be executed after dependency injection is done to perform
* any initialization. This method must be invoked before the class
* is put into service. This annotation must be supported on all classes
* that support dependency injection. The method annotated with
* PostConstruct must be invoked even if the class does
* not request any resources to be injected. Only one
* method in a given class can be annotated with this annotation.
* The method on which the PostConstruct annotation is
* applied must fulfill all of the following criteria:
*
* - The method must not have any parameters except in the case of
* interceptors in which case it takes an
InvocationContext
* object as defined by the Interceptors specification.
* - The method defined on an interceptor class or superclass of an
* interceptor class must have one of the following signatures:
*
* void <METHOD>(InvocationContext)
*
* Object <METHOD>(InvocationContext) throws Exception
*
* Note: A PostConstruct interceptor method must not throw application
* exceptions, but it may be declared to throw checked exceptions including
* the java.lang.Exception if the same interceptor method interposes on
* business or timeout methods in addition to lifecycle events. If a
* PostConstruct interceptor method returns a value, it is ignored by
* the container.
*
* - The method defined on a non-interceptor class must have the
* following signature:
*
* void <METHOD>()
*
* - The method on which the
PostConstruct annotation
* is applied may be public, protected, package private or private.
* - The method must not be static except for the application client.
* - The method should not be final.
* - If the method throws an unchecked exception the class must not be put into
* service except in the case where the exception is handled by an
* interceptor.
*
* @see com.alibaba.nacos.shaded.javax.annotation.PreDestroy
* @see com.alibaba.nacos.shaded.javax.annotation.Resource
* @since 1.6, Common Annotations 1.0
*/
@Documented
@Retention (RUNTIME)
@Target(METHOD)
public @interface PostConstruct {
}