How to add an object to application scope in Spring

Question

We can set the request attributes using Model or ModelAndView object in Spring.

We can use @SessionAttributes to keep attributes

Answer 1

Basically all that is needed to configure an application scope is to use the ServletContext, and you can do it in Spring as follows:

public class MyBean implements ServletContextAware {

    private ServletContext servletContext;

    public void setServletContext(ServletContext servletContext) {
        this.servletContext = servletContext;
    }

}

javax.servlet.ServletContext could be even injected to your bean implementation as follows:

@Component
public class MyBean {

    @Autowired
    private ServletContext servletContext;

    public void myMethod1() {
        servletContext.setAttribute("attr_key","attr_value");
    }

    public void myMethod2() {
        Object value = servletContext.getAttribute("attr_key");
        ...
    }

}