What is the use of extends and parent attributes in spring bean file. Is it related to a class extending another class. If some could share some thoughts around this it would be great. Some linke and examples would also be helpful.
The abstract
and parent
mechanism is used to keep your XML configuration DRY (Don't Repeat Yourself).
Consider you have 2 beans with 3 similar properties and 2 distinct.
Instead of repeating those 3 similar properties in both beans, you can do this:
abstract
and holds those 3 common properties. An example would be here .
<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.xsd">
<bean id="BaseCustomerMalaysia" class="com.mkyong.common.Customer" abstract="true">
<property name="country" value="Malaysia" />
</bean>
<bean id="CustomerBean" parent="BaseCustomerMalaysia">
<property name="action" value="buy" />
<property name="type" value="1" />
</bean>
</beans>
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