<p><b>Spring Bean definition inheritance-</b> A bean definition potentially contains a large amount of configuration information, including container specific information and constructor arguments and property values. A child bean definition inherits <b style="color: #274e13;">configuration data from a parent definition</b>. The child definition can override some values, or add others, as needed. Using parent and child bean definitions can save a lot of typing. Effectively, this is a form of templating.</p>
<div dir="ltr" style="text-align: justify;">
<div dir="ltr" style="text-align: justify;">
<div dir="ltr" style="text-align: justify;">
<div id="ads-id" align="center"></div>
<div class="separator" style="clear: both; text-align: center;"><img src="https://dineshonjava.com/wp-content/uploads/2012/06/spring-bean-definition-inheritance.jpg" border="0" /></div>
<p><b><i>@ImageSource-Slideshare.net</i></b></p>
<p>If you work with an <i><b> </b></i><i><b>ApplicationContext</b></i><i><b> </b></i>interface programmatically, child bean definitions are represented by the <i><b> </b></i><i><b>ChildBeanDefinition</b></i><i><b> </b></i>class. Most users do not work with them on this level, instead configuring bean definitions declaratively in something like the <i><b> </b></i><i><b>ClassPathXmlApplicationContext</b></i>.</p>
<p>When you use XML-based configuration metadata, you indicate a child bean definition by using the parent attribute, specifying the parent bean as the value of this attribute.</p>
<div style="background-color: #f2f9fc; border: 1px solid #c9e6f2; border-radius: 3px; padding: 16px; line-height: 1.45;"><span style="color: red; font-size: x-large; text-align: center;"><b>Popular Tutorials</b></span></p>
<ul style="text-align: left;">
<li><b><a href="https://dineshonjava.com/spring-tutorial/"><em><strong>Spring Tutorial</strong> </em></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-web-mvc-framework-chapter-38/"><strong><em>Spring MVC Web Tutorial </em></strong></a></b></li>
<li><b><a href="https://dineshonjava.com/introduction-to-spring-boot-a-spring-boot-complete-guide/"><strong>Spring Boot Tutorial</strong> </a></b></li>
<li><b><a href="https://dineshonjava.com/spring-security-take-baby-step-to-secure/"><em>Spring Security Tutorial</em></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-tutorial-with-example-aspect-advice-pointcut-joinpoint/"><em>Spring AOP Tutorial</em></a></b></li>
<li><b><a href="https://dineshonjava.com/using-spring-jdbc-framework-chapter-32/"><em>Spring JDBC Tutorial</em></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-hateoas-hypermedia-driven-restful-web-service/"><em><strong>Spring HATEOAS </strong></em></a></b></li>
<li><b><a href="https://dineshonjava.com/microservices-with-spring-boot/"><em><strong>Microservices with Spring Boot</strong></em></a></b></li>
<li><b><a href="https://dineshonjava.com/jax-rs-web-service-tutorial/"><strong><em>REST Webservice</em> </strong></a></b></li>
<li><b><a href="https://dineshonjava.com/core-java-baby-step-to-be-best-java-ian/"><em><strong>Core Java </strong></em></a></b></li>
<li><b><a href="https://dineshonjava.com/hibernate-3-on-baby-steps/"><em><strong>Hibernate Tutorial</strong></em></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-batch-process-with-example/"><strong><em>Spring Batch</em> </strong></a></b></li>
</ul>
</div>
<div style="color: #274e13;">
<p>Spring Bean definition inheritance has nothing to do with Java class inheritance but inheritance concept is same. You can define a parent bean definition as a template and other child beans can inherit required configuration from the parent bean.</p>
<p>Now the following example illustrate the bean definition inheritance with triangle classes and its parents classes.</p>
</div>
<p><b>Triangle.java</b></p>
<pre class="highlight">package com.dineshonjava.sdnext.beanDefInherit.tutorial; 
 
public class Triangle 
{ 
 private Point pointA; 
 private Point pointB; 
 private Point pointC; 
 /** 
 * @param pointA the pointA to set 
 */ 
 public void setPointA(Point pointA) { 
 this.pointA = pointA; 
 } 
 
 /** 
 * @param pointB the pointB to set 
 */ 
 public void setPointB(Point pointB) { 
 this.pointB = pointB; 
 } 
 
 /** 
 * @param pointC the pointC to set 
 */ 
 public void setPointC(Point pointC) { 
 this.pointC = pointC; 
 } 
 
 public void draw() 
 { 
System.out.println("PointA is ("+pointA.getX()+", "+pointA.getY()+")"); 
System.out.println("PointB is ("+pointB.getX()+", "+pointB.getY()+")"); 
System.out.println("PointC is ("+pointC.getX()+", "+pointC.getY()+")"); 
 } 
} 
</pre>
<p><b>Point.java</b></p>
<pre class="highlight">package com.dineshonjava.sdnext.beanDefInherit.tutorial; 
 
public class Point 
{ 
 private int x; 
 private int y; 
 /** 
 * @return the x 
 */ 
 public int getX() { 
 return x; 
 } 
 /** 
 * @param x the x to set 
 */ 
 public void setX(int x) { 
 this.x = x; 
 } 
 /** 
 * @return the y 
 */ 
 public int getY() { 
 return y; 
 } 
 /** 
 * @param y the y to set 
 */ 
 public void setY(int y) { 
 this.y = y; 
 } 
} 
</pre>
<div style="color: #274e13;">Following is the configuration file spring.xml where we defined &#8220;parentTriangle&#8221; bean which has one property &#8220;pointA&#8221;. Next there are two beans &#8220;triangle1&#8221; bean and &#8220;triangle2&#8221; bean has been defined as a child of &#8220;parentTriangle&#8221; bean by using parent attribute. The child beans inherits &#8220;pointA&#8221; property as is, and overrides &#8220;pointA&#8221; property and introduces two more properties &#8220;pointB&#8221; and &#8220;pointC.</div>
<p><b>Spring.xml</b></p>
<pre class="highlight"><;beans xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" xmlns:> 
<div style="color: #274e13;">Once you are done with creating source and bean configuration files, let us run the following application. If everything is fine with your application, this will print the following message:</div> 
<b>Point.java</b> 
<pre class="highlight">package com.dineshonjava.sdnext.beanDefInherit.tutorial; 
 
import org.springframework.context.ApplicationContext; 
import org.springframework.context.support.ClassPathXmlApplicationContext; 
 
/** 
 * @author Dinesh Rajput 
 * 
 */ 
public class DrawingApp 
{ 
 /** 
 * @param args 
 */ 
 public static void main(String[] args) 
 { 
ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml"); 
Triangle triangle = (Triangle) context.getBean("triangle1"); 
triangle.draw(); 
 } 
} 
</pre>
<div style="color: #274e13;">Now we get the following message:</div>
<div style="background-color: #ff99cc; border-width: thin; border: solid;">
<div style="color: blue;"><b>Output:</b></div>
<div style="color: red;">Jul 1, 2012 1:43:35 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh</div>
<div style="color: red;">INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@ab50cd: startup date [Sun Jul 01 01:43:35 IST 2012]; root of context hierarchy</div>
<div style="color: red;">Jul 1, 2012 1:43:35 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions</div>
<div style="color: red;">INFO: Loading XML bean definitions from class path resource [spring.xml]</div>
<div style="color: red;">Jul 1, 2012 1:43:36 AM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons</div>
<div style="color: red;">INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@14c1103: defining beans [parentTriangle,triangle1,triangle2,pointA,pointB,pointC]; root of factory hierarchy</div>
<p><b>PointA is (0, 0)</b><br />
<b>PointB is (-20, 0)</b><br />
<b>PointC is (20, 0)</b></p>
</div>
</div>
<div style="color: #274e13;">If you observed here, we did not pass "<b>pointA</b>" while creating "<b>triangle1</b>" bean, but it got passed because of <b>Bean Definition Inheritance</b>.</div>
<div style="color: #274e13;"></div>
<p> ;</p>
<div style="background-color: #f2f9fc; border-radius: 3px; border: 1px solid #c9e6f2; line-height: 1.45; padding: 16px;"><span style="color: red; font-size: x-large; text-align: center;"><b>Spring Related Topics you may like</b></span></p>
<ul>
<li><b><a href="https://dineshonjava.com/interview-questions-on-spring/"><span style="color: red;">Spring Interview Questions and Answers</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-interview-questions-and-answers/"><span style="color: red;">Spring AOP Interview Questions and Answers</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-mvc-interview-questions-and-answers/"><span style="color: red;">Spring MVC Interview Questions</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-security-interview-questions-and-answers/"><span style="color: red;">Spring Security Interview Questions and Answers</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-rest-web-services-interview-questions-and-answers/"><span style="color: red;">Spring REST Interview Questions and Answers</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-boot-interview-questions-and-answers/"><span style="color: red;">Spring Boot Interview Questions and Answers</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-boot-microservices-interview-questions-answers/"><span style="color: red;">Spring Boot Microservices Interview Questions and Answers</span></a></b></li>
<li><b><a href="https://dineshonjava.com/dependency-injection-in-spring/"><span style="color: red;">Dependency Injection (DI) in Spring </span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-ioc-container/"><span style="color: red;">Spring IoC Container</span></a></b></li>
<li><b><a href="https://dineshonjava.com/what-is-bean-factory-in-spring/"><span style="color: red;">What is Bean Factory in Spring</span></a></b></li>
<li><b><a href="https://dineshonjava.com/application-context-in-spring/"><span style="color: red;">ApplicationContext in Spring</span></a></b></li>
<li><b><a href="https://dineshonjava.com/bean-autowiring-in-spring/"><span style="color: red;">Bean Autowiring in Spring</span></a></b></li>
<li><b><a href="https://dineshonjava.com/understanding-bean-scopes/"><span style="color: red;">Spring Bean Scopes</span></a></b></li>
<li><b><a href="https://dineshonjava.com/create-custom-bean-scope-in-spring-example/"><span style="color: red;">Create Custom Bean Scope in Spring Example</span></a></b></li>
<li><b><a href="https://dineshonjava.com/using-applicationcontextaware-in-spring/"><span style="color: red;">Using ApplicationContextAware in Spring</span></a></b></li>
<li><b><a href="https://dineshonjava.com/bean-lifecycle-and-callbacks/"><span style="color: red;">Spring Bean Life Cycle and Callbacks</span></a></b></li>
<li><b><a href="https://dineshonjava.com/writing-beanpostprocessor-in-spring/"><span style="color: red;">BeanPostProcessor in Spring</span></a></b></li>
<li><b><a href="https://dineshonjava.com/writing-beanfactorypostprocessor-in/"><span style="color: red;">BeanFactoryPostProcessor in Spring</span></a></b></li>
<li><b><a href="https://dineshonjava.com/annotations-in-spring-and-based/"><span style="color: red;"> Annotations in Spring and Based Configuration</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-jsr-250-annotations/"><span style="color: red;">Spring JSR-250 Annotations</span></a></b></li>
<li><b><a href="https://dineshonjava.com/jsr-330-annotations-in-spring/"><span style="color: red;">JSR 330 Annotations in Spring</span></a></b></li>
<li><b><a href="https://dineshonjava.com/stereotype-annotations-in-spring/"><span style="color: red;">Spring @Component, @Repository, @Service and @Controller Stereotype Annotations</span></a></b></li>
<li><b><a href="https://dineshonjava.com/method-injection-with-spring-using-lookup-method-property/"><span style="color: red;">Method injection with Spring using Lookup method property</span></a></b></li>
<li><b><a href="https://dineshonjava.com/introduction-to-aop-in-spring/"><span style="color: red;">Spring AOP-Introduction to Aspect Oriented Programming</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aspect-annotation/"><span style="color: red;">@Aspect Annotation in Spring</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-aspectj-before-annotation-advice-example/"><span style="color: red;"> Spring AOP AspectJ @Before Annotation Advice Example<br />
</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-before-advice-example-using-xml-config/"><span style="color: red;"> Spring AOP Before Advice Example using XML Config</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-aspectj-after-annotation-advice-example/"><span style="color: red;"> Spring AOP AspectJ @After Annotation Advice Example</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-after-advice-example-using-xml-config/"><span style="color: red;"> Spring AOP After Advice Example using XML Config</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-aspectj-after-returning-annotation-advice-example/"><span style="color: red;"> Spring AOP AspectJ @AfterReturning Annotation Advice Example</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-after-returning-advice-example-using-xml-config/"><span style="color: red;"> Spring AOP After-Returning Advice Example using XML Config</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-aspectj-after-throwing-annotation-advice-example/"><span style="color: red;"> Spring AOP AspectJ @AfterThrowing Annotation Advice Example</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-after-throwing-advice-example-using-xml-config/"><span style="color: red;"> Spring AOP After Throwing Advice Example using XML Config</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-aspectj-around-annotation-advice-example/"><span style="color: red;"> Spring AOP AspectJ @Around Annotation Advice Example</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-around-advice-example-using-xml-config/"><span style="color: red;"> Spring AOP Around Advice Example using XML Config</span></a></b></li>
<li><b><a href="https://dineshonjava.com/understanding-aop-proxies-chapter-31/"><span style="color: red;">Spring AOP Proxies in Spring</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-transaction-management-in/"><span style="color: red;"> Spring AOP Transaction Management in Hibernate</span></a></b></li>
<li><b><a href="https://dineshonjava.com/transaction-management-in-spring/"><span style="color: red;">Spring Transaction Management</span></a></b></li>
<li><b><a href="https://dineshonjava.com/declarative-transaction-management/"><span style="color: red;">Spring Declarative Transaction Management Example</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-aop-ordering-of-aspects-with-example/"><span style="color: red;">Spring AOP-Ordering of Aspects with Example</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-security-java-based-configuration-with-example/"><span style="color: red;">Spring Security Java Based Configuration with Example</span></a></b></li>
<li><b><a href="https://dineshonjava.com/spring-security-xml-namespace-configuration-example/"><span style="color: red;">Spring Security XML Namespace Configuration Example</span></a></b></li>
</ul>
<p> ;</p>
</div>
</div>
<p> ;</p>
</div>
<div class="wp-post-navigation"> 
									 <div class="wp-post-navigation-pre"> 
									 <a href="https://dineshonjava.com/using-applicationcontextaware-in-spring/">Previous</a> 
									 </div> 
									 <div class="wp-post-navigation-next"> 
									 <a href="https://dineshonjava.com/bean-lifecycle-and-callbacks/">Next</a> 
									 </div> 
									</div>
<script type="text/javascript">
jQuery(document).ready(function($) {
 $.post('https://dineshonjava.com/wp-admin/admin-ajax.php', {action: 'mts_view_count', id: '664'});
});
</script>
Strategy Design Patterns We can easily create a strategy design pattern using lambda. To implement…
Decorator Pattern A decorator pattern allows a user to add new functionality to an existing…
Delegating pattern In software engineering, the delegation pattern is an object-oriented design pattern that allows…
Technology has emerged a lot in the last decade, and now we have artificial intelligence;…
Managing a database is becoming increasingly complex now due to the vast amount of data…
Overview In this article, we will explore Spring Scheduler how we could use it by…