Snippet

Managing Bean Creation Scopes with Scope Annotation

By default, Spring beans are singletons, meaning one shared instance exists per container. Annotating a class with @Scope(SCOPE_PROTOTYPE) applies the Prototype pattern, instructing Spring to create a brand new, independent object instance every time the bean is requested or injected.

snippet.java

java

@Component
@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class ShoppingCart {
    private final List<String> items = new ArrayList<>();
 
    public void addItem(String item) {
        this.items.add(item);
    }
 
    public int getItemCount() {
        return this.items.size();
    }
}

spring

Breakdown

@Component

Registers the ShoppingCart class as a Spring-managed bean candidate.

@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)

Changes the bean lifecycle from singleton (default) to prototype (new instance per injection/request).

private final List<String> items = new ArrayList<>();

Maintains state private to each distinct prototype bean instance.

public void addItem(String item) {

Mutates the internal item list without affecting other ShoppingCart instances.

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Managing Bean Creation Scopes with Scope Annotation

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