The main constraint in the dispatchaction is the method name in the action class and the button name in the jsp page should be the same. Currencyconverterform has properties fromcurrency, tocurrency. For example, if the parameter is methodchinese, then the chinese method will be execute. I would like to know in which scenarios these classes has to be extended. Lookupdispatchaction is subclass of dispatchaction in case of dispatchaction, we have to declare the method name in the jsp page. Difference between mvc1 and mvc2 hi,mvc is a design pattern. Difference between action and dispatch action in struts dispatch action class is used to group related action into one class. Dispatch action lookupdispatchaction its a parent class of lookupdispatchaction subclass of dispatch action dispatchaction provides a mechanism for grouping a set of related functions into asingle action, thus eliminating the need to create separate actions for each function.
I would like to know some of differences between action, dispathaction and lookupdispatchaction. Mutliclick prevention using struts tokens with code example. The difference between lookupdispatchaction and dispatchaction is that the actual method that gets called in lookupdispatchaction is based on a lookup of a key value. The difference between lookupdispatchaction and dispatchaction is that the actual method that gets called in lookupdispatchaction is based on a. Struts lookupdispatchaction example struts lookupdispatch action org. May 18, 20 struts lookupdispatchaction example struts lookupdispatch action org. It eliminates the need of creating multiple independent actions for each function. Apr 28, 2016 you can try these interview questions and answers on java, j2ee, struts, spring, svn, rad, maven, xml, design pattern. Top 10 struts interview question and answer j2ee javarevisited. The main difference between model 1 and model 2 is that in model 2, a controller. What is the difference between dispatchaction and lookupdispatchaction in struts framework. Lookupdispatchaction class is much like the dispatchaction. Difference between the dispatchaction and dispatchlookup action is that the latter does a reverse lookup to match the localized value submitted for the button back to the message key. Which is the best website that has a collection of interview questions.
Diff bw dispatchaction lookupdispatchaction oracle community. What is the difference between dispatch action and lookup. What is difference between lookupdispatchaction and. Lazy setting decides whether to load child objects while loading the parent object. You need to do this setting respective hibernate mapping file of the parent class. Find answers to what is the differnece between look up dispatch and dispatch action in struts from the expert community at experts exchange. Includeaction, dispatchaction, lookupdispatchaction and switchaction. Find answers to difference between dispatchaction and lookupdisactaction. Tutorial,springs, jsp servlet,jsp servlets,servlets,jsp example,jsp file,jsp.
Difference between action and dispatchaction classes grouping related actions into one class is possible using dispatchaction class. Lookupdispatchaction looks into the resource bundle file and find out the corresponding key name. What is the difference between dispatchaction and lookupdispatchaction in. Invoke and invoke called directly on an instance of a control. Jul 16, 2009 lookupdispatchaction is subclass of dispatchaction in case of dispatchaction, we have to declare the method name in the jsp page. Dispatchaction selects the method to execute depending on the request parameter valuewhich is configured in the xml file. The basic difference is that lookupdispatchaction uses a map and the message key to look up hence the lookup part of the class name which method to run, while dispatchaction uses the parameter value directly. Here the program explained with the programs statistics. Dispatch action,struts dispatchaction vs lookupdispatchaction,configuring. Dispatchaction an abstract action that dispatches to a public method that is named by the request parameter whose name is specified by the parameter property of the corresponding actionmapping. Apr 21, 2010 for example, if the parameter is methodchinese, then the chinese method will be execute.
Lookup dispatch action is useful when we are using internalization. What is the difference between dispatchaction and lookupdispatchaction. What is the difference between forwardaction and includeaction. As far as i understand the dispatcher is responsible for handling messages for a thread, so does control. Dispatchaction class provides a mechanism for modularizing a set of related functions into a single action. Which is the best website that has a collection of interview. Mvc1 the controller is jsp where as in mvc2 the contrller is servlet the main difference is mvc1 combines both presentation logic with the business logic. This action is useful for developers who prefer to combine many similar actions into a single action class, in. Diff bw dispatchaction lookupdispatchaction oracle. Difference between dispatchaction and lookupdisactaction. What is difference between lookupdispatchaction and dispatchaction.
In this tutorial you will learn how to group a set of related functions into a single action using struts dispatchaction. An abstract action that dispatches to the subclass. Struts dispatchaction class is used to group similar functionality into a single action, and execute the function depends on the given parameter value. However, if you use internationalization, this wont work because the label of the button could be in any number of languages. An action class in the struts application extends struts org. In this example we will see how to group a set of user related actions. Struts flow and architecture 1 a request comes in from a java server page into the actionservlet. For example, we have a currencyconverterform and we dont want a. Difference between dispatchaction and lookupdispatchaction what is the difference between dispatchaction and lookupdispatchaction tiles in lookupdispatchaction struts tiles in lookupdispatchaction hi, i am new in using tiles. You can try these interview questions and answers on java, j2ee, struts, spring, svn, rad, maven, xml, design pattern. Dispatchaction in struts, java, lookupdispatchaction in struts, resource bundle, struts framework posted in struts 1. In this example we will see how to group a set of user related actions like add user, update user and delete user into a single action called useraction. To use lookupdispatchaction, you must create a subclass from it and provide a set of methods that will be called to process requests.
Also, a request parameter, which would be visible to. This struts interview question is pretty straight forward and i have. This make sure that the child objects are not loaded unless they are explicitly invoked in the application by. What are the differences between struts1 and struts2. In case of dispatchaction, you have to declare the method name in the jsp page.
Whenever i see interesting thing regarding technology, i plan to code it and put it here. Following is an example useraction class that extends dispatchaction. This class enables a user to collect related functions into a single action class. Here in this example you will learn more about struts dispatch action that will help you grasping the concept better. A action class extends the dispatchaction, and contains four methods to set the locale into the struts session attribute for the localization. Dispatchaction is nothing but combination of different actions into one action but in this case in form the button names and the method names must be same. The method to execute on a dispatchaction is determined by struts based on the value of a specified request parameter. What is the differnece between look up dispatch and. The subclass must also include a getkeymethodmap method that maps methods in the class to keys in the struts resource bundle file. What are the differences between dispatchaction and.
The difference between lookupdispatchaction and dispatchaction is that the actual method that gets called in lookupdispatchaction is. Struts interview questions struts faqs jsf interview. The message key is then mapped to the name of the dispatch method. The difference between lookupdispatchaction and dispatchaction is that the. In case of lookupdispatchaction there is no rule to same the button names and method names and in lookupdispatchaction there is a method available in action.
What are the differences between dispatchaction and lookupdispatchaction in struts. In this tutorial you will learn how to group a set of related functions into a single action using struts lookupdispatchaction. Hibernate load vs get, difference between load vs get, methods load and get,hibernate load and get methods. The main constraint in the dispatchaction is the method name in the. Heres an example to show the use of dispatchaction. This action is useful for developers who prefer to combine many similar actions into a single action class, in order to simplify their application. The dispatchaction class is used to group related actions into one class. The basic difference is that lookupdispatchaction uses a map and the message key to look up hence the lookup part of the class name which method to run, while dispatchaction uses the parameter value. But here in lookupdispatchaction, we can have different names for the buttons and the methods. An abstract action that dispatches to the subclass mapped executes method. Diff bw dispatchaction lookupdispatchaction 843841 apr 10, 2007 4. Lookupdispatchaction is one of the builtin actions provided along with the struts framework.
Lookupdispatchaction provides a mechanism for grouping a set of related functions into a single action, thus eliminating the need to create seperate actions for each functions. First create a new dynamic web project and configure it as maven project. It eliminates the need to create separate independent actions for each function. Struts framework is an opensource framework for developing the web applications in. It does a reverse lookup on the resource bundle to get the key and then gets the method whose name is associated with the key into the resource bundle. Difference between action and dispatchaction classes career ride. We can map this key name to a method name by overriding the getkeymethodmap. Struts java2share scjp scwcd syllabus exam pattern. Nov 20, 2010 difference between dispatchaction and lookupdispatchaction.
In most of the cases you would extend this class and override execute method. Struts interview questions struts faqs jsf interview questions. Which is the best website that has a collection of. Dispatchaction class enables a user to collect related functions into a single action. For example, we have a currencyconverterform and we dont want a java class. The difference between lookupdispatchaction and dispatchaction is that the actual method that gets called in lookupdispatchaction is based on a lookup of a key value instead of specifying the method name directly. An abstract action that dispatches to a public method that is named. Hi, dispatchaction dispatches the action based on the parameter value. Difference between dispatchaction and lookupdispatchaction. Can you please explanin with the practical example. What is the difference between dispatch action and lookup dispatch action in struts. Dispatchaction dispatches the action based on the parameter value. This action is useful for developers who prefer to combine many similar actions into a single action class, in order to simplify. An abstract action that dispatches to a public method that is named by the request parameter whose name is specified by the parameter property of the corresponding actionmapping.
The keyword to answer this struts interview questions is mvc design. Apr 10, 2007 diff bw dispatchaction lookupdispatchaction 843841 apr 10, 2007 4. Dispatchaction provides a mechanism for grouping a set of related functions into a single action, thus eliminating the need to create seperate actions for each functions. Ive tried reading some points over the web and its not clear lookupdispatchaction shields the application from the side effect of i18n, also it refers. Mvc2 separate in mvc1 we can have multiple controller servlets but in mvc2 we can have only one controller servlet. In simple action class will have only one method called execute.
You could then use dispatchaction and code the methods add, update, and delete, and struts would forward to the appropriate method based on the button pressed. The difference between lookupdispatchaction and dispatchaction is that the actual method that gets called in lookupdispatchaction is based on a lookup of a key value instead of. Where as lookupdispatchaction which is a subclass of it. I created this blog for programming in java related technologies to sharpen my skills and to obtain feedback from others. Lookupdispatchaction provides a mechanism for grouping a set of related functions into a single action, thus eliminating the need to create seperate actions for. Describe the main difference between lookupdispachaction and dispatchaction classes. Lookupdispatchaction is subclass of dispatchaction. The lookupdispatchaction is a subclass of dispatchaction. Ive tried reading some points over the web and its not clear lookupdispatchaction shields the application from the side effect of i18n, also it refers about resourcebundle and locale independent. The controller requestprocessor will select an appropriate action for each request, create an instance if necessary, and call the execute method. You use the same expression for both getting and setting the value of a property. For example the validation and workflow interceptors, the validation.
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