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How does spring manage these objects internally?

When are the singleton objects created and destroyed?

CaptainDaVinci
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Parag
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  • An almost identical question was asked recently: http://stackoverflow.com/questions/3599068/can-the-object-created-in-ioc-container-be-called-singleton-if-not-why – Sean Patrick Floyd Sep 01 '10 at 06:56

1 Answers1

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By default, Spring beans are basically singletons. Spring will create a single instance of each of your classes, and it will generally do this when Spring is initialized.

However, this is nearly infinitely customizable. Spring can also create a new instance of a bean whenever you ask for that bean by name, or it can create beans for the length of a request, or it can use a singleton but not instantiate it until the first time you invoke it, or several other things.

The discussion of when beans are instantiated and how long they last is a discussion of a bean's "Scope". Check it out in the documentation: http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/beans.html#beans-factory-scopes

Sean Patrick Floyd
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Brandon Yarbrough
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  • thanks , It means i have defined same bean with two different name in spring the IOC container creates two objects which have the spring singleton scope....??? – Parag Sep 05 '10 at 05:57
  • yes, although I suppose the terminology would be that you have defined two different beans of the same class. – Brandon Yarbrough Sep 05 '10 at 16:34