How does spring manage these objects internally?
When are the singleton objects created and destroyed?
How does spring manage these objects internally? When are the singleton objects created and
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How does spring manage these objects internally?
When are the singleton objects created and destroyed?
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