What is the difference between request and session scope in spring?
In request scope, a bean is defined in an HTTP request, while in session scope, it is defined in the scope of an HTTP session. So, for example, if the scope of the bean is a request and a user makes more than one request for a web page in their user session, then a new bean will be created on each request.
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When to use bean scope and session scope?
In case the scope of the bean is defined as session, if a user makes a request for a web page more than once, the same bean is used in each request, as long as the requests are within the same user session and are made from a client that is capable of maintaining the session.
How to define session scope in XML configuration?
To define the session scope via the XML configuration file, we should do something like this: Note that, as in the request scope, we need the proxyMode parameter; this will create a proxy object that will be used for dependency injection until the session and instance is opened. of the created session-scoped bean.
When to invalidate, session or scope?
When a user visits your web application, the web container creates a session. Therefore, the session lifetime lasts as long as the user interacts with your application or as long as session.invalidate() is called. Application scope: o The global scope is associated with your web application. This scope lives while the web application is deployed.
When to use session and request scope in spring?
The request scope creates a bean instance for a single HTTP request, while the session scope creates an HTTP session. The application scope creates the bean instance for the lifecycle of a ServletContext and the websocket scope creates it for a particular WebSocket session. Let’s create a class to use to instantiate the beans: ? 4.1.
How are scopes defined in the Spring Framework?
The scope of a bean defines the lifecycle and visibility of that bean in the contexts in which we use it. The latest version of the Spring framework defines 6 types of scopes: the last four mentioned scopes, request, session, application, and websocket, are only available in a web-aware application.
What does it mean to have a singleton scope in spring?
2. Singleton Scope Defining a bean with singleton scope means that the container creates a single instance of that bean, and all requests for that bean name will return the same object, which is cached. Any modification to the object will be reflected in all references to the bean. This scope is the default value if no other scope is specified.