Spring Bean Life Cycle - ApplicationContextAware Interface | Spring Tutorial

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Spring Bean Life Cycle - ApplicationContextAware Interface | Spring Tutorial

Spring Bean Life Cycle - ApplicationContextAware Interface | Spring Tutorial

Spring Bean Life Cycle - ApplicationContextAware Interface | Spring Tutorial

Spring Bean Life Cycle - ApplicationContextAware Interface | Spring Tutorial

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>

Employee.java

package com.ram.model;

/**
 * Spring bean
 */
public class Employee
{
    private String name;

    public void setName(String name)
    {
        this.name = name;
    }

    @Override
    public String toString()
    {
        return "Employee [name=" + name + "]";
    }
}

ApplicationContextAwareImpl.java

package com.ram.contextaware;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import com.ram.model.Employee;

public class ApplicationContextAwareImpl implements ApplicationContextAware
{

    private ApplicationContext applicationContext;

    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException
    {

        System.out.println(
                "setApplicationContext method called by the Spring Container");
        this.applicationContext = applicationContext;

    }

    public void displayEmployeeDetails()
    {
        Employee employee = applicationContext.getBean("employee",
                Employee.class);

        System.out.println(
                "Got employee object from the ApplicationContext(Spring Container) = "
                        + employee);

        System.out.println("is employee object Singleton? = "
                + applicationContext.isSingleton("employee"));
    }

}

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="employee" class="com.ram.model.Employee">
        <property name="name" value="Peter" />
    </bean>

    <bean id="applicationContextAware" class="com.ram.contextaware.ApplicationContextAwareImpl" />
   
</beans>

App.java

package com.ram.core;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ram.contextaware.ApplicationContextAwareImpl;

public class App
{
    public static void main(String[] args)
    {
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
                "applicationContext.xml");

        ApplicationContextAwareImpl applicationContextAwareImpl = applicationContext
                .getBean("applicationContextAware",
                        ApplicationContextAwareImpl.class);

        applicationContextAwareImpl.displayEmployeeDetails();

        applicationContext.close();
    }

}

Output

Aug 11, 2018 11:11:22 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Sat Aug 11 11:11:22 IST 2018]; root of context hierarchy
Aug 11, 2018 11:11:23 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
setApplicationContext method called by the Spring Container
Got employee object from the ApplicationContext(Spring Container) = Employee [name=Peter]
is employee object Singleton? = true
Aug 11, 2018 11:11:23 AM org.springframework.context.support.AbstractApplicationContext doClose
INFO: Closing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Sat Aug 11 11:11:22 IST 2018]; root of context hierarchy

Click the below link to download the code:
https://sites.google.com/site/ramj2eev2/java_basics/SpringDemo_ApplicationContextAware.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/javaee/tree/master/Spring_2018/SpringDemo_ApplicationContextAware

Bitbucket Link:
https://bitbucket.org/ramram43210/spring/src/0f95bd7d3cf82bedd49352677bb53c114f740152/Spring_2018/SpringDemo_ApplicationContextAware/?at=master

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