Re: Request scope question again...
Hi Dave: I am very sorry again to keep asking questions about this. I think I am finally starting to understand... But please pardon my ignorance. If you have the following scenario where all is defined as request scope: 1. The user hits the submit button on FORM A and FORM A's action forwards to FORM B (which has input fields and another submit button). 2. The User hits FORM B's submit button which throws back a report (in html) Are we looking at 2 different requests in the above scenario (request 1 ending when FORM B comes upand request 2 ending when the report data comes back?). If we are looking at 2 different requests, that could explain the problem I am having. Is the submit action per-se (which calls another action when the submit button is hit) the end-all of each request? thanks, Theron dderry [EMAIL PROTECTED]To: Struts Users Mailing List [EMAIL PROTECTED] rg cc: Subject: Re: Request scope question again... 02/24/02 07:41 PM Please respond to Struts Users Mailing List Yes. As I understand it, as long as the Action classes are performing forwards rather than redirects it will all be handled on the server side in the same request. It is only when a response is returned to the browser that the request will be ended. On the other hand, if a redirect is performed, that is done by sending a response to the browser which somehow tells tells the browser to request a different page. I don't know how this works exactly, could be a header, but I really don't know. The thing to keep in mind though is that a 'request' consists of the browser requesting a resource from the server, and the server responding back to the browser. Whatever happens on the server, no matter how many resources or Actions process that request, it is all the same request until the response is returned to the browser. Glad to be able to help. Dave D - Original Message - From: [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Sunday, February 24, 2002 3:57 PM Subject: Re: Request scope question again... Hi Dave: thanks so much. This is helping. I think I know the answer to this question but can you verify this with me: - Based on what you said: Request scope changes when the browser makes a request of the server. Does this mean that invoking an http request to bring up a JSP page or HTML page will start a brand new request?. And if the entry point JSP page (say http://localhost:8080/test/login.jsp) calls actions (that can forward to other jsp pages) that call other actions (that can forward to other jsp pages) that call other actions (that can forward to other jsp pages) and so forth, that all of those actions (regardless of how many JSP pages were brought up in those actions ActionForward mappings) are all a part of the same request (which could have been something like http://localhost:8080/test/login.jsp) thanks so much, Theron -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Request scope question again...
Yes and no. In the scenario you outlined, there are two requests. TThe original request ends when the response comes back to the browser not when you press submit. Throughout all of your action, the request is still the same. A new request is started when you hit submit again on form B. Hope that helps. -JC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 3:56 PM To: Struts Users Mailing List Cc: [EMAIL PROTECTED] Subject: Re: Request scope question again... Hi Dave: I am very sorry again to keep asking questions about this. I think I am finally starting to understand... But please pardon my ignorance. If you have the following scenario where all is defined as request scope: 1. The user hits the submit button on FORM A and FORM A's action forwards to FORM B (which has input fields and another submit button). 2. The User hits FORM B's submit button which throws back a report (in html) Are we looking at 2 different requests in the above scenario (request 1 ending when FORM B comes upand request 2 ending when the report data comes back?). If we are looking at 2 different requests, that could explain the problem I am having. Is the submit action per-se (which calls another action when the submit button is hit) the end-all of each request? thanks, Theron dderry [EMAIL PROTECTED]To: Struts Users Mailing List [EMAIL PROTECTED] rg cc: Subject: Re: Request scope question again... 02/24/02 07:41 PM Please respond to Struts Users Mailing List Yes. As I understand it, as long as the Action classes are performing forwards rather than redirects it will all be handled on the server side in the same request. It is only when a response is returned to the browser that the request will be ended. On the other hand, if a redirect is performed, that is done by sending a response to the browser which somehow tells tells the browser to request a different page. I don't know how this works exactly, could be a header, but I really don't know. The thing to keep in mind though is that a 'request' consists of the browser requesting a resource from the server, and the server responding back to the browser. Whatever happens on the server, no matter how many resources or Actions process that request, it is all the same request until the response is returned to the browser. Glad to be able to help. Dave D - Original Message - From: [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Sunday, February 24, 2002 3:57 PM Subject: Re: Request scope question again... Hi Dave: thanks so much. This is helping. I think I know the answer to this question but can you verify this with me: - Based on what you said: Request scope changes when the browser makes a request of the server. Does this mean that invoking an http request to bring up a JSP page or HTML page will start a brand new request?. And if the entry point JSP page (say http://localhost:8080/test/login.jsp) calls actions (that can forward to other jsp pages) that call other actions (that can forward to other jsp pages) that call other actions (that can forward to other jsp pages) and so forth, that all of those actions (regardless of how many JSP pages were brought up in those actions ActionForward mappings) are all a part of the same request (which could have been something like http://localhost:8080/test/login.jsp) thanks so much, Theron -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Request scope question again...
Hi Dave: thanks so much. This is helping. I think I know the answer to this question but can you verify this with me: - Based on what you said: Request scope changes when the browser makes a request of the server. Does this mean that invoking an http request to bring up a JSP page or HTML page will start a brand new request?. And if the entry point JSP page (say http://localhost:8080/test/login.jsp) calls actions (that can forward to other jsp pages) that call other actions (that can forward to other jsp pages) that call other actions (that can forward to other jsp pages) and so forth, that all of those actions (regardless of how many JSP pages were brought up in those actions ActionForward mappings) are all a part of the same request (which could have been something like http://localhost:8080/test/login.jsp) thanks so much, Theron dderry [EMAIL PROTECTED]To: Struts Users Mailing List [EMAIL PROTECTED] rg cc: Subject: Re: Request scope question again... 02/22/02 05:22 PM Please respond to Struts Users Mailing List Hey Theron, Let me take a shot at this for you. I don't claim to be an expert (except when applying for a job ;-) ), so hopefully an expert will correct any mis-information. Page scope is valid only for a single page. Typically this MAY be the same as request scope. However, if your Action class performs a forward to a different page (or action), page scope will change (because it is a new page), but it is still the same request scope. Request scope changes when the browser makes a request of the server. So a redirect (rather than a forward) will terminate request scope because the browser has to make an additional request to retrieve the desired page. When the user his the back button, NO beans will be used. remember that beans reside on the server (all JSP activities are server side). The beans work with the JSP to generate an HTML document that is delivered to the browser to render. Hitting the back button merely retrieves this previously rendered HTML document from the browser cache; no request is made to the server. Hopes this helps to clarify things for you. And if I have misspoken, I hope that someone will correct me. Dave D - Original Message - From: [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Friday, February 22, 2002 6:40 PM Subject: Request scope question again... Hi Folks: How can I determine when a bean/form in request scope has terminated? Will hitting the back button on the browser and bringing up JSP pages that use beans in request scope be using invalid beans in that case (since they have scope=request)? I'm still trying to figure out the difference between request scope and page scope. thanks, Theron -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Request scope question again...
Yes. As I understand it, as long as the Action classes are performing forwards rather than redirects it will all be handled on the server side in the same request. It is only when a response is returned to the browser that the request will be ended. On the other hand, if a redirect is performed, that is done by sending a response to the browser which somehow tells tells the browser to request a different page. I don't know how this works exactly, could be a header, but I really don't know. The thing to keep in mind though is that a 'request' consists of the browser requesting a resource from the server, and the server responding back to the browser. Whatever happens on the server, no matter how many resources or Actions process that request, it is all the same request until the response is returned to the browser. Glad to be able to help. Dave D - Original Message - From: [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Sunday, February 24, 2002 3:57 PM Subject: Re: Request scope question again... Hi Dave: thanks so much. This is helping. I think I know the answer to this question but can you verify this with me: - Based on what you said: Request scope changes when the browser makes a request of the server. Does this mean that invoking an http request to bring up a JSP page or HTML page will start a brand new request?. And if the entry point JSP page (say http://localhost:8080/test/login.jsp) calls actions (that can forward to other jsp pages) that call other actions (that can forward to other jsp pages) that call other actions (that can forward to other jsp pages) and so forth, that all of those actions (regardless of how many JSP pages were brought up in those actions ActionForward mappings) are all a part of the same request (which could have been something like http://localhost:8080/test/login.jsp) thanks so much, Theron -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Request scope question again...
Hey Theron, Let me take a shot at this for you. I don't claim to be an expert (except when applying for a job ;-) ), so hopefully an expert will correct any mis-information. Page scope is valid only for a single page. Typically this MAY be the same as request scope. However, if your Action class performs a forward to a different page (or action), page scope will change (because it is a new page), but it is still the same request scope. Request scope changes when the browser makes a request of the server. So a redirect (rather than a forward) will terminate request scope because the browser has to make an additional request to retrieve the desired page. When the user his the back button, NO beans will be used. remember that beans reside on the server (all JSP activities are server side). The beans work with the JSP to generate an HTML document that is delivered to the browser to render. Hitting the back button merely retrieves this previously rendered HTML document from the browser cache; no request is made to the server. Hopes this helps to clarify things for you. And if I have misspoken, I hope that someone will correct me. Dave D - Original Message - From: [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Friday, February 22, 2002 6:40 PM Subject: Request scope question again... Hi Folks: How can I determine when a bean/form in request scope has terminated? Will hitting the back button on the browser and bringing up JSP pages that use beans in request scope be using invalid beans in that case (since they have scope=request)? I'm still trying to figure out the difference between request scope and page scope. thanks, Theron -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
