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How to call ejb from Struts
Purushotham2007
- Oct 29th, 2008
Yes, we use Service locator design pattern We can call from Action Calss through JNDI to home object. then call remote object from home object
kiran
- May 19th, 2007
Yeah I too agree with this, Here action class is client for EJBFirst get home interface object using JNDI then call remote interface reference variable and continue.
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How can container will know this is a struts application?
mani.sivapuram
- Feb 17th, 2011
Here one thing i want to finalize i.e everything is working on servlet container only i.e we need only serlet container not sturts container .since when we deploy the application into the servlet cont...
vinaymudgil007
- Feb 7th, 2011
The control is forwarded from the container to struts controller when is reads an entry like :-- <servlet-name>action</servlet-name> <serv...
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What is difference between Html tags and Struts specific HTML Tags
MuthuKumaran
- Jul 15th, 2014
HTML tags are static and Struts tags are dynamic. Struts tags can be created by the page authors. Binding of the property value with the Formbean property is done by the Struts tags. HTML tags support...
mani.sivapuram
- Feb 15th, 2011
Struts html tags internally uses normal html tags only but the differnce is to reduce the developers task internally we implement normal html and those are abstracted and we provide in terms of struts specific html tags.
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What is the difference between Struts 1.0 and Struts 1.1
Prabhakar122
- Nov 3rd, 2010
Struts 1.1 new features are:====================1) Method perform() replaced by execute() in Struts base Action Class2) Declarative exception handling3) Dynamic ActionForms4) The Struts Validator5) De...
raj.ntrj
- Nov 11th, 2008
The new features added to Struts 1.1 are 1. RequestProcessor class 2. Method perform() replaced by execute() in Struts base Action Class3. Changes to web.xml and struts-config.xml4.Declarative excepti...
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Why servlet is used as controller ?not JSP? i want complete Explation?
In struts servlet control the application and we know that a jsp compiled into a servlet first. The only problem with the servlet is that it needs to write out.println call per HTML line. But as a controller in struts servlets do not force the programmers to write out.println, that is the part of JSP which acts as View.So if the controller would be JSP the translation (JSP compiled to a servlet)step...
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What we will define in Struts-config.xml file. And explain their purpose
pradeepkmr18
- Jun 7th, 2008
These are the tags we can define <data-sources/><form- beans/>,<global- forwards/>,,,<message-resources>,<switch-action><plug-in/>
Sony V George
- Apr 4th, 2007
We can say like soul of struts is Struts-config.xml.The server will read struts-config.xml once only on the time of server starting. so server will know how and where to re-route to each and every req...
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Can we use any other technology than JSP to construct a view ?
Yes, other than JSP we can use Swing, JSF, Cocoon etc as a front end for our struts application. Here is a link to the article for using struts with swing as front end
vinaymudgil007
- Feb 7th, 2011
I think that flex is quiet popular these days apart of JSF, swings, velocity which can be used.Thanks,Vinay
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What is the main difference between Action and DispatchAction classes
pradeepkmr18
- Jun 8th, 2008
If our Form has single function we have to go for action class but if our Form has to perform multiple functions then we have go for dispatch action.In struts config we have to provide parameter="...
ckanth99
- Mar 26th, 2008
An Action class is part of the controller which is used as an adaptor between the web tier and business tier. An Action class is invoked by ActionServlet to perform an operation depending on the...
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Explain Struts navigation flow
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Editorial / Best Answer
ravi_1229- Member Since Nov-2006 | May 9th, 2009
1) When first the request is made from a JSP/HTML/XSLT to the server with a particular URI(/something.do), the controll first reaches Web.xml file.
2) it checks the mapping for /something.do in web.xml and finds the ActionServlet and loads ActionServlet.
......
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
.....
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
3) As part of loading ActionServlet calls the init() as every other servlet does.
(Note: ActionServlet extends HttpServlet only)
......................
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
........................
4) in init() it takes the init-parameters as struts-config.xml and loads the xml file.
5) then the ActionServlet calls the proceed() of RequestProcessor class.
6) in proceed() , it checks the appropriate mapping for current request, creates and ActionMapping object and maps the URI to the action in the struts-config.xml.
7) then it creates an object to ActionForm associated to that action mapped object
8) calls the setters and reset().
9) if the action tag in struts-config.xml contains validate="true", then the validate method is called.
10) if any validation errors, it return to view component (any jsp,XSLT) which is specified as an attribute of input="/error.jsp"
11) if there are not validation errors, it then creates an Action class for that mapping and search for execute method and executes it.
12) execute method performs the bussinesslogic which you provide and returns with an ActionForward key.
13) now the returned key is searched in the mapping object which is specified as forward tag.
14) it looks for the appropriate view component and performs the getters on that view component and returns the response to the browser.
Simple, Thats it.
Thanks
Ravi
Prabhakar122
- Oct 31st, 2010
Struts navigation flow================1) When application server gets started,container loads the web.xml1) When first request is made from a JSP/HTML/XSLT to the server with a particular URI(/somethi...
devabscmca
- Oct 7th, 2010
Struts flow After developing the struts application after deploying it is the server & when you started the server then following things will happened Container initializes the web.xml When co...
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type="com.test.LoginForm"/>
path="/login"
type="com.test.user.login.LoginAction"
name="loginForm"
validate="false">
Question: Assuming the class LoginForm contains a String property named "password", how does the LoginAction class access the attribute called "password" in the above request? Explain why.
Choice 1
String password = request.getParameter("password");
Choice 2
String password = request.getAttribute("password");
Choice 3
request.getParameterNames().getParameter("password");
Choice 4
String password = ((LoginForm) form).getPassword();
Choice 5
String password = form.getPassword();
">Question: Assuming the class LoginForm contains a String property named "password", how does the LoginAction class access the attribute called "password" in the above request? Explain why.Choice 1 String password = request.getParameter("password"); Choice 2 String password = request.getAttribute("password"); Choice 3 request.getParameterNames().getParameter("password"); Choice 4 String password = ((LoginForm) form).getPassword(); Choice 5 String password = form.getPassword();
vinaymudgil007
- Feb 7th, 2011
Choice 4
String password = ((LoginForm) form).getPassword();
is the appropriate answer wrt struts framework.
Thanks,
Vinay
prasad.juturi
- Aug 24th, 2009
If the values are set from a JSP, then we need to follow the request.getAttribute() method and while revalidating the fileds, the request.getParameter() method?will be fired.The reason for the above t...
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What is struts flow? Explain in detail
Prabhakar122
- Nov 4th, 2010
Struts Flow======== 1) When application server gets started,container loads the web.xml2) When first the request is made from a JSP/HTML/XSLT to the server with a particular URI(/something....
kanna_sp2000
- Oct 4th, 2010
1. A request comes in with a .do extension, the container maps it to the ActionServlet. 2. The ActionServlet acts like a front end controller and dispatches control to a RequestProcessor. 3. The Reque...
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What are the core classes of struts?
v.prathibha
- Sep 23rd, 2011
Actionform, Actionclass, ActionMapping, ActionForwrd, Action Errors.
devabscmca
- Jul 31st, 2010
The core class of struts framework is 1) ActionServlet2) Action3) ActionForward4) ActionMapping5) ActionErrors6) RequestProcessor7) ActionForm
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What is the difference between servlet context and servlet config
vinaymudgil007
- Feb 7th, 2011
Servlet Config 1 Servlet config are one per servlet per JVM 2 It's inside the servlet it wont accessible to outside the servlet. Ex: <servlet> ??????????? <init-p...
Rohit
- Jul 22nd, 2007
Servlet Config parameters are set for the servlet initialization, these information is necessary for the servlet startup, eg.: Database connectivity, other xml files. etc.Servlet Context are used by t...
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Explain Struts Framework flow? and How JSP file can be processed?
pradeep
- May 25th, 2006
Hi to allAs Madhav specified (Struts follows MVC architecture and has many design patterns which it uses inside(ex Frontcontroller,Value Objects). )what are the other design patterns which it uses inside and can it be brief
sravishankarprasad
- Apr 28th, 2006
Struts Frame work This is what i understud by reading books and also tested successfully.When a request is made to the Struts application, the first servlet Invoked is ActionServlet, which contai...
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Is there any way to define a default method for every in the action mapping of Struts-Config.XML file? If yes then how? Give a piece of code demonstrating the same.
vinaymudgil007
- Feb 7th, 2011
Overriding org.apache.struts.action.RequestProcessor is another solution I would suggest.Thanks,Vinay
krishnachaitanya.v
- Jul 8th, 2008
use unknown = true tag in action tag of struts-config.xml.With this, the action mapping will be defaulted if no matching path is found.Eg:<action-mappings><action path="/example&quo...
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When you have a global forward and a local forward in struts-config.xml, which one will be called
Kola.Nareshreddy
- Nov 19th, 2009
By default precedence is given to the local forward. Global forward is like global and available always, but if you don't want that global forward then very well you have to add a local forward. It's just like Local and Global variables.
muvvalasrinu
- May 28th, 2009
Local Forwards always override Global Forward names. So for example, if you have a Global Forward with the name shoppingCart and a local Forward with the same name, the local Forward takes priority. If a local Forward can not be found then Struts will try to find the same name among Global Forwards.
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Struts Heirarchy of Files
What is heirarchy of files in Struts?
mani.sivapuram
- Feb 15th, 2011
When we send the request from client then first it touches the ActionServlet--->RequestProcessor---->ActionForm(do the required validations)---->Action (execute method is executed)---->Service class(i...
ameesala
- May 14th, 2009
When the request is recived by ActionServlet it looks for the ActionMapping entries in the Struts-config.xml. ActionMapping returns the appropriate Action class where we handle the business logic.Finally execute() returns the ActionForward key (View).
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What are the various Struts tag libraries
pradeepkmr18
- Jun 7th, 2008
There are only five struts tag libraries1)Bean tag lib2)Html tag lib3)logic tag lib4)nested tag lib5)Template tag libothers are JSTL tag libraries(ex: c.tld,sql.tld,fmt.tld)
nirav
- May 24th, 2007
Agree with Amzad. in struts as on version 1.2 we have only six tag libs.
Struts Interview Questions
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