• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Bear Bibeault
  • Ron McLeod
  • Jeanne Boyarsky
  • Paul Clapham
Sheriffs:
  • Tim Cooke
  • Liutauras Vilda
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Tim Holloway
  • fred rosenberger
  • salvin francis
Bartenders:
  • Piet Souris
  • Frits Walraven
  • Carey Brown

Spring Controllers singleton or not?

 
Ranch Hand
Posts: 117
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi All,
I know that spring beans are singleton by default. I want to know whether Spring controllers are singleton or a new instance is created for each user?
 
ranger
Posts: 17346
11
Mac IntelliJ IDE Spring
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Still a singleton, and proud of it. ;)

Mark
 
Greenhorn
Posts: 7
Eclipse IDE Spring Linux
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi Fawad Ali,

By default it always singleton.

There are many ways to check your bean is singleton or not. For your confirmation if you want to check just create a Standalone application and load your configuration file from BeanFactory or ApplicationContext thn get your bean more thn one time using getBean() method.

And finally print object and check the address of that objects.It should be same. For example you can see below code in main method....


Resource resource = new FileSystemResource("com/spring/example/spring.cfg.xml");
BeanFactory factory = new XmlBeanFactory(resource);

Singleton singleton = (Singleton) factory.getBean("singleton");

Singleton singleton1 = (Singleton) factory.getBean("singleton");

System.out.println("Address 1=>"+singleton);
System.out.println("Address 2=>"+singleton1);

xml file has...

<bean id="singleton" class="com.example.Singleton">
</bean>
 
Climb the rope! CLIMB THE ROPE! You too tiny ad:
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop
https://coderanch.com/wiki/718759/books/Building-World-Backyard-Paul-Wheaton
    Bookmark Topic Watch Topic
  • New Topic