Why FacesContext is null?
Why FacesContext is null?
1 Answer. It will return null when you’re not in a managed bean or any other JSF artifact. For example, in a plain vanilla servlet or a servlet filter which runs before FacesServlet runs. The FacesServlet is namely the one who creates the FacesContext and puts it as a ThreadLocal in the current HTTP request.
What is FacesContext getCurrentInstance ()?
getCurrentInstance. public static FacesContext getCurrentInstance() Return the FacesContext instance for the request that is being processed by the current thread.
What is FacesContext in JSF?
JSF defines the javax. faces. context. FacesContext abstract base class for representing all of the contextual information associated with processing an incoming request, and creating the corresponding response.
What is JSF Faces Servlet?
FacesServlet is a servlet that manages the request processing lifecycle for web applications that are utilizing JavaServer Faces to construct the user interface.
What is external context in JSF?
And, ExternalContext generally offers access to Servlet or Portlet-specific artifacts which JSF is currently using “under the covers”. E.g., when running on a Servlet container, the HTTP servlet request, HTTP servlet response, HTTP session and Servlet context and inherently also all of their artifacts.
How do I get FacesContext?
In simple JSF applications, the FacesContext can be retrieved using the following command: FacesContext facesContext = FacesContext. getCurrentInstance(); If you want to retrieve the FacesContext during event processing, this method will return a NULL value as the FacesContext will not have been set up yet.
What is the FacesContext?
FacesContext contains all of the per-request state information related to the processing of a single JavaServer Faces request, and the rendering of the corresponding response. It is passed to, and potentially modified by, each phase of the request processing lifecycle.
What is JSF example?
JSF is serverbased, e.g. the JSF UI components and their state are represented on the server with a defined life cycle of the UI components. JSF is part of the Java EE standard. A JSF application run in a standard web container, for example Tomcat or Jetty.
Is used with JSF?
The JSF Tag libraries are used to add components on the web pages and connect components with objects on the server. It also contains tag handlers that implements the component tag….Java Server Faces Versions History.
| Versions | Release date | Description |
|---|---|---|
| Jsf 1.0 | 11-03-2004 | It was a initial specification released. |
What is internal context?
Identifying internal issues Your organisation’s internal context is the environment in which you aim to achieve your objectives. Internal context can include your approach to governance, your contractual relationships with customers, and your interested parties.