Bean Scopes

Patterns

• Scope != Pattern
• Spring Uses Them
• Course(s): Design Patterns in Java

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Scopes

• Valid in any configuration
      Singleton
      Prototype
• Valid only in web-aware Spring projects
      Request
      Session
      Global

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Singleton

• One Instantiation
• Default Bean Scope
• Single instance per Spring container

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Singleton - Java Config

• @Scope
• Requires AOP jar

Demo

applicatonContext.xml

default: singleton

prototype

Using a Constant Demo

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Singleton - XML Config

• scope="singleton"

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Prototype

• Per request
• Guaranteed unique
• Opposite of Singletion

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Web Scopes

• Introduction to Spring MVC course
• Request
• Session
• GlobalSession

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Summary

• Scopes
      Singleton
      Prototype
  
• Web Scopes
      Request
      Session
      GlobalSession
  

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Properties
https://blog.csdn.net/u012596785/article/details/79865454