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Differen types of spring bean scopes


In the spring bean configurations, bean attribute called 'scope' defines what kind of object has to created and returned. There are 5 types of bean scopes available, they are:

1) singleton: Returns a single bean instance per Spring IoC container.

2) prototype: Returns a new bean instance each time when requested.

3) request: Returns a single instance for every HTTP request call.

4) session: Returns a single instance for every HTTP session.

5) global session: global session scope is equal as session scope on portlet-based web applications.

If no bean scope is specified in bean configuration file, then it will be by default 'singleton'.

Here is an example for specifying bean scope configuration:

<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-3.0.xsd">
	
    <!-- Since scope is not defined, it assigns default value 'singleton'.
     It creates only one instance per spring IoC. -->
	<bean id="articleBean" class="com.java2novice.bean.Article" />
	
	<!-- Since scope is prototype, it creates and returns ColorBean for every 
	call-->
	<bean id="clrBean" class="com.java2novice.bean.ColorBean" scope="prototype"/>
	
	<bean id="ticketBean" class="com.java2novice.bean.TicketManager" scope="singleton"/>
    
</beans>
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Spring framework examples

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  2. Spring bean java based configuration using @Configuration and @Bean
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  7. Spring Dependency Injection via setter method
  8. Spring Dependency Injection via Constructor
  9. Constructor overloading issue with spring constructor injection
  10. Constructor vs Setter dependency Injection in Spring
  11. How to inject value into spring bean instance variables?
  12. Spring bean tag properties
  13. Differen types of spring bean scopes
  14. How to inject inner bean in spring?
  15. Set spring bean scope using annotation
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  18. Spring bean destruction callback
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  20. Spring bean init and destroy methods using annotations
  21. Spring Bean Post Processors
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Knowledge Centre
What is adapter class?
An adapter class provides the default implementation of all methods in an event listener interface. Adapter classes are very useful when you want to process only few of the events that are handled by a particular event listener interface. You can define a new class by extending one of the adapter classes and implement only those events relevant to you.
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I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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