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What is the meaning of @PostConstruct?
Annotation Type PostConstruct 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.
What can I use instead of PostConstruct?
We can replace @PostConstruct with BeanFactoryPostProcessor and PriorityOrdered interface. The first one defines an action that ought to be executed after the object’s instantiation. The second interface tells the Spring the order of the component’s initialization.
What is Spring @PostConstruct?
When we annotate a method in Spring Bean with @PostConstruct annotation, it gets executed after the spring bean is initialized. We can have only one method annotated with @PostConstruct annotation. This annotation is part of Common Annotations API and it’s part of JDK module javax.
How can Postconstructs be prevented?
The method SalesDataAggregate is running on startup because of the @PostConstruct annotation. If you want to keep it from running during tests you can create the class containing the post construct in your test folder and add the @primary annotation so it takes precedence over the class in your main project.
How many times is PostConstruct called?
2. @PostConstruct. Spring calls the methods annotated with @PostConstruct only once, just after the initialization of bean properties.
What is PostConstruct Spring?
Spring calls the methods annotated with @PostConstruct only once, just after the initialization of bean properties. Keep in mind that these methods will run even if there’s nothing to initialize. The method annotated with @PostConstruct can have any access level, but it can’t be static.
What is the use of PostConstruct annotation in Spring?
What is the use of PostConstruct annotation?
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.
What is @PostConstruct in Spring Boot?
@PostConstruct is an annotation used on a method that needs to be executed after dependency injection is done to perform any initialization. Spring Boot @PostConstruct example. The following application demonstrates the usage of @PostConstruct. It uses the annotation to create two log methods that are called after their beans are initialized.
What are the requirements for PostConstruct methods?
If a PostConstruct interceptor method returns a value, it is ignored by the container. The method on which PostConstruct is applied MAY be public, protected, package private or private. The method MUST NOT be static except for the application client. The method MAY be final.
What is the purpose of @PostConstruct in Java?
The purpose of this method should be to release resources or perform any other cleanup tasks before the bean gets destroyed, for example closing a database connection. 4. Java 9+ Note that both @PostConstruct and @PreDestroy annotations are part of Java EE.