JAVA EE: Spring Bean Life Cycle - BeanNameAware Interface | Spring Tutorial

Monday, 27 August 2018

Spring Bean Life Cycle - BeanNameAware Interface | Spring Tutorial | Spring Framework

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Spring Bean Life Cycle - BeanNameAware Interface | Spring Tutorial | Spring Framework

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0%20http://maven.apache.org/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.ram.core</groupId>

    <artifactId>SpringDemo</artifactId>

    <packaging>jar</packaging>

    <version>1.0-SNAPSHOT</version>

    <name>SpringDemo</name>

    <url>http://maven.apache.org</url>

    <properties>

        <spring.version>5.0.2.RELEASE</spring.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>3.8.1</version>

            <scope>test</scope>

        </dependency>

        <!-- Spring 5 dependencies -->

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-core</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>${spring.version}</version>

        </dependency>

    </dependencies>

</project>

BeanNameAwareImpl.java

package com.ram.aware;

import org.springframework.beans.factory.BeanNameAware;

public class BeanNameAwareImpl implements BeanNameAware

{

    public void setBeanName(String beanName)

    {

        System.out.println(

                "setBeanName(String beanName) is called by the Spring Container");

        System.out.println("Bean name = " + beanName);

    }

}

applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-4.3.xsd">

    <bean id="beanNameAware" class="com.ram.aware.BeanNameAwareImpl"/>

</beans>

App.java

package com.ram.core;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ram.aware.BeanNameAwareImpl;

public class App

{

    public static void main(String[] args)

    {

        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(

                "applicationContext.xml");

        BeanNameAwareImpl beanNameAwareImpl = applicationContext

                .getBean("beanNameAware", BeanNameAwareImpl.class);

        System.out.println("beanNameAwareImpl = "+beanNameAwareImpl);

        applicationContext.close();

    }

}

Output

Aug 12, 2018 12:10:47 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh

INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Sun Aug 12 12:10:47 IST 2018]; root of context hierarchy

Aug 12, 2018 12:10:47 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions

INFO: Loading XML bean definitions from class path resource [applicationContext.xml]

setBeanName(String beanName) is called by the Spring Container

Bean name = beanNameAware

beanNameAwareImpl = com.ram.aware.BeanNameAwareImpl@5c7fa833

Aug 12, 2018 12:10:47 PM org.springframework.context.support.AbstractApplicationContext doClose

INFO: Closing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Sun Aug 12 12:10:47 IST 2018]; root of context hierarchy