Called by dispatcherservlet for evaluation of the model. Debug dispatcherservlet null modelandview returned to. No request handling method with name test in class com. Dispatcherservlet null modelandview returned to dispatcherservlet with name dispatch. Return the view object, or null if we are using a view name to be resolved by the dispatcherservlet via a viewresolver.
Requestmappinghandlermapping did not find handler method. There are no errors or exceptions thrown at server. And of course were returning the modelandview object with some model data for good measure. Null modelandview returned to dispatcherservlet stack overflow. Modelandview merely holds both to make it possible for a controller to return both model and view in a single return value. Return whether this modelandview object is empty, i.
Lars hoss opened spr9 and commented the sample code in chapter 9. Spring framework example source code file dispatcherservlet. This resolver will decide what client should see exactly on the screen. Class to represent a model and view returned by a handler used by a dispatcherservlet. The intent of this project is to help you learn java by example tm. But response rendered is empty or blank as you can see in the above screen capture. If gson mapper is chosen, the oauth token response is. Dispatcherservlet null modelandview returned to dispatcherservlet with name dispatcherservlet. Interview question on modelandview and dispatcherservlet. Java spring returning null modelandview to dispatcherservlet. I need to know if modelandview object when returned is directed to the dispatcherservlet, in this case to be redirected to another controller, to the facesservlet, in this case. In the class we have created a method which returns a modelandview object and is mapped to a get request thus any url call ending with test would be routed by the dispatcherservlet to the gettestdata method in the testcontroller. Dispatcherservlet null modelandview returned to dispatcherservlet with name minimaldbaseexample. Holder for both model and view in the web mvc framework.
Debug dispatcherservlet null modelandview returned to dispatcherservlet with name dispatcherservlet. The servlet doesnt invoke the method directly it basically serves as a bridge between itself and the handler objects, leading to a loosely coupling design. Return the configured handlermapping beans that were detected by type in the webapplicationcontext or initialized based on the default set of strategies from dispatcherservlet. Null modelandview returned to dispatcherservlet with name applicationcontext. Represents a model and view returned by a handler, to be resolved by a dispatcherservlet. Return whether this modelandview object is empty as a result of a call to clear. Spring modelandview tutorial using modelandview in a. Spring returning null modelandview to dispatcherservlet question. This method may return null if invoked prior to onrefreshapplicationcontext. The dispatcherservlet accesses all installed handlers through this interface, meaning that it does not contain code specific to any handler type. The dispatcherservlet then uses a handleradapter to invoke this method. Dispatcherservlet null modelandview returned to dispatcherservlet with name dispatcher. After configuring the application in eclipse and starting the. This however doesnt work with the latest version for it produces a nullp.
Null modelandview returned to dispatcherservlet with name. It is the hub of request dispatch, often referred to as the frontend controller, also known as the request dispatcher. What happens, if we return null object for modelandview in spring mvc request flow. In spring webmvc, all requests start with a class called dispatcher servlet. Java code, classname dispatcherservlet, artifactid. Return the view object, or null if we are using a view name to be resolved by the. Modelandview holder for both model and view in the web mvc framework. Dispatcherservlet uses request handler mapping to discover the. Interview question on modelandview and dispatcherservlet in. Next, it returns this view to dispatcherservlet which can, at this moment, apply interceptors defined as callable after view generation. Spring returning null modelandview to dispatcherservlet tag.
This class merely holds both to make it possible for a controller to return both model and view in a single return value. If there are multiple dispatcherservlet configured in web. Null modelandview returned to dispatcherservlet with. Dispatcherservlet null modelandview returned to dispatcherservlet with name springservlet. This interface is used to allow the dispatcherservlet to be indefinitely extensible. The return type of this method is void and it doesnt generate modelandview return type as produced by other. Modelandview is a holder for both model and view in the web mvc framework. Spring framework example source code file modelandview.
When i was working with this exception, i found something wierd happening in spring annotations. Model entries may not be null, but the model map may be null if there is no model data. Dispatcherservlet lastmodified value for exampleindex. Default is to return the webapplicationcontext as themesource, provided that it implements the themesource interface.