Re: core struts -- best practise fundementals
peru cheppanu wrote: Thanks for replying me. The basic idea is knowing the need for tag libraries.. for which the explanation was given as reusability. In my opinion, the purpose of tags, besides reusability (after all, plain objects and methods are reusable and easier to implement), is rendering the JSPs more readable and understandable by programmers more familiar with HTML. But this is true not only if assuming that one working with the JSPs is java challenged. And to demonstrate this I suggest the following experiment. Take a JSP (say medium sized) and make 2 versions of it: one using the logic tags and the other using java scriptlets instead (the replacement should be straightforward). Then compare the 2 versions - the more readable one should be obvious. :-) Now, coming to specific example I have given: I agree that it should not be a part of logic: library. But, I think one such tag (substring) is useful in some cases. Why not prepare the data in the form required by the view before getting there? Usually doing so in a custom tag requires for more intermediary steps to be done. And, as already suggested, maybe someone out there already made such a handy tools tag library that has one custom tag which does substring. Say I need to populate a 40 * 10 table with two variables in each cell. I will need a object array of size 400 with two parameters in it. ( I can have Hashmap if I have identical keys, but say thats not the case either). Instead I can have 400 String objects sent with some delimeter. I will save lot of object instantiations and substring the ones with two params. What do you think? I think that in the end, by doing substring in the jsp, you'll have even more objects created for each cell: the original string with the delimiter and two strings representing your needed values after extracting them. Remember that String is immutable and .substring() creates a new one when you call it on an instance. If all you have to do with each the values pairs is showing it in a table cell, why don't you just concatenate the values using a space as separator and then just display the string in the cell? Anyway... this kind of potential problems solving should be left aside initially when you design and develop your application. Otherwise it could really prevent you on concentrating on the business logic and model and postponing your delivery date. This kind of performance problems should only be addressed at the end, **if** they really show up as performance bottlenecks. You could be surprised by how fast java is... ;-) - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: core struts -- best practise fundementals
Although the previous two answers are basically correct, I don't think they really contain the response to Peru's initial question. I hope that the elders of this list will clarify things a bit for him. :-) I considered that I'd better avoid responding myself to this, as one that sometime ago was asking (myself and others) why should using the logic:equals or logic:iterate be better than using the equivalent java code - which was also faster for me to do than learning the new tags Still... In this specific case, maybe the answer is not writing a whole new custom tag at all. It wouldn't be very efficient anyway, especially if the parsing mentioned is done in one or two particular places only. It might show that maybe a model layer does not exist for the application, and maybe the data is directly retrieved from a (probably legacy) database. (Forgive me if I'm wrong.) At least that parsing could be done in the Action that prepares the view, and the data stored in a form that is easier to display. Even if you will still chose to use a custom tag for that, attaching it to the struts standard logic taglib wouldn't be a good choice ( if that was what you meant by a tag used as logic:substring ...) Radu - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[OT] Re: [To sum it up] Re: Confused / one little question
In fact, this thread was really about Struts and how it integrates with various J2EE technologies and containers, not about Hibernate/EJBs... Anyway: I don't think that anyone says that Hibernate is better than EJB period; but maybe easier and more flexible to use than Entity EJBs CMP, which is just one of the species of EJBs. It is true that EJB (entity beans or not) has these nice features you mention: declarative transactions and declarative security (multi threading and synchronization are in fact container and coding related, and also implemented by Hibernate), BUT the question is: are those really necessary? Hibernate also supports CMT, and, if facaded by SessionBeans (which is a very common scenario and is also recomanded for entity beans), you have declarative transactions. Security is a very nice feature, but in scenarios where you only use a web application to access the EJBs, and the EJB container is isolated from the rest of the world, it becomes either useless, or a burdain to use... And I think that this scenario is the most common (especially among the subscribers to a list such as Struts Users :) It's also true that in some scenarios the Entity Beans might be more effective than using an ORM such as Hibernate, but these scenarios are extremely rare... Also, even Hibernate is sometimes regarded as being too complicated and too hard to learn by some (it was a very hot discussion about this on this list), and in even simpler scenarios are preferred even simpler tools such as iBatis, ORB, etc.. In my opinion, a discussion with a subject such as EJB is better than Hibernate is completely meaningless... The right tool always depends on the job, and the right tool for every imaginable job was just not yet invented. :-) The answer to your last question IMHO is: yes, you can, if the web layer is the only thing accessing your beans. But the subject of security is much more complicated in a real-life application than what framework do I need to best implement it? You're welcome, Radu Marco Mistroni wrote: Hello all, Sorry to get into this thread so late... Since I have same view as Daniel about Hibernate/EJBs, I wanted to ask one additional question, since right now I am using EJBs.. Now, EJBs have some features that let the coder concentrate only On the business logic instead of dealing, for example, with synchronization, transaction, threading ..and security, meaning that you can declare in the Deployment descriptor which roles are allowed to do what with your EJBs. Where can you do the same with ORM tools? In the web layer? Or do you have to have a security framework in place (such as acegi)? Thanx and regards Marco - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: session and request scope
At 08:14 14.03.2005, Craig McClanahan wrote: For a developer, though, you should train yourself to good habits in the first place -- use request scope for *everything* unless it absolutely must be saved, on the server side, in between requests from the same user. This sounds like common-sense but is only feasible in theory; that's because in non-trivial web-apps almost all the interactions are some kind of a dialog spanning multiple requests with the user and inevitably require session-stored data between request. Cleaning such data when the dialog ends becomes a pain. I hope that the Dialog Controller in the forecoming Shale will address this problem and provide the means for a dialog-local session that will automatically be released once the dialog completes. Furthermore, once a user is in the middle of such a pageflow, it shouldn't be possible to leave (requesting another dialog sequence) until the current one finishes. I've once worked with a home-made web framework which implemented such behavior (like a state machine) where the entire application was divided into states (each having a corresponding view), each state could have transitions (a transition executing an action) to other states or to another sub-application. Each state machine had it's own separate session which was removed on execution end. Between state-machines parameters could be sent by-value copying from one session to the other. All this was specified in an external xml doc. Too bad it was lacking a system for automating request and session parameters retrieval (like the ActionForms in Struts). That is the behavior that I would personally like in Shale, because I think it allows for much better design and reuse. Radu - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Typical Struts development team and distribution of tasks?
Hmm.. this sound like a lot of work for the Framework/HTML/User interface guy considering the user- and presentation-intensive kind of pages nowadays ;-) And that's precisely what happens in practice; in fact that was also my point in the previous message. Working with JSPs (and Servlet / Action as controllers for the views) requires Framework/HTML/User interface persons (aka java web developers which are supposed to be experts in HTML, JSP and Servlets) to solve common web applications problems. It's also true that Struts makes easier much of these aspects, but still... At 21:13 11.03.2005, you wrote: We don't even try to have the development people do the web page. In theory the process is: 1. Framework/HTML/User interface person creates an HTML version of the page that includes as manny of the options and alternatives as possible. 2. Application developer builds the business logic and controller to build the functionality. Along the way, the static HTML page is transformed into a JSP page. 3. First person then does final tweaks and maintenance on the JSP page. In practice, there are mutliple iterations of this, and I couldn't conceive of it working unless the framework person and the developer person work well together and are close both in the organization chart and geographically. Mark Benussi wrote: I agree, a good J2EE developer can take a UI from a designer (A Photoshop file or the like) and return a pixel perfect html representation as well as meeting the MVC business requirements. -Original Message- From: Radu Badita [mailto:[EMAIL PROTECTED] Sent: 11 March 2005 17:20 To: Struts Users Mailing List Subject: Re: Typical Struts development team and distribution of tasks? Good question! I barely can wait for answers from the other guys out there; cuz in what I saw so far, the Java Developers are supposed to be able to turn static visual models (often not even html) into Struts web applications, finding clever solutions (usually good ol' javascript) to UI designs that don't account for the nature of web applications (request/response interactions). So a Java [web] Developer must know a lot of html, css, javascript (and of course Struts tags / JSTL) or at least enough to know where to find solutions to particular problems... On the other hand, I'm just starting with Tapestry right now and beginning to see that it could really make possible starting with a static html design of a UI and enhancing it to become a dynamic web app. Also it provides an almost event-driven kind of framework... Also note that Shale is supposed that will support pretty much of the same design (components and events, but without the almost pure html templates), and even better, support for dialog-like interactions across multiple requests. At 18:38 11.03.2005, you wrote: Do most companies developing Struts applications tend to employ Web Designers, or is it more common for Struts development to be undertaken by a team consisting solely of Java Developers (who therefore need strong knowledge of HTML, Struts Tags, JSTL, CSS, JavaScript, etc as well as J2EE)? Along the same lines... If you are working in a mixed team of Web Designers and Java Developers, what is the best way to divide up Struts (+ Tiles) development between these groups? The reason I ask these questions is that the vast majority of my previous experience has been in back-end development (EJB, JMS, ORM, RDBMS, etc), and now that I am learning Struts I am more than a little bit confused as to what I'd be expected to know for the average Struts job... _ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Neil Erdwien, [EMAIL PROTECTED], Web Technologies Manager Computing and Network Services, Kansas State University - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Typical Struts development team and distribution of tasks?
At 21:35 11.03.2005, you wrote: In practice, there are mutliple iterations of this, and I couldn't conceive of it working unless the framework person and the developer person work well together and are close both in the organization chart and geographically. You can't get any closer than the two being the same person! :-) We have three Java/Web/SQL developers. We all pretty much have our hands in all of the layers of the application code, from SQL and PL/SQL all the way to HTML and JavaScript. Yeah... sad but true. -- Jeff Beal Webmedx, Inc. Pittsburgh, PA USA - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: using Taglibs
In theory, you could... But in practice it's virtually impossible (unless you're building an app with just a few pages/forms/actions). I suggest you take a look at Tapestry - it uses more than simple pages (they are instrumented HTML, not even JSPs) that can even be designed by a designer totally agnostic of JSP and maintain their original form. At 09:46 11.03.2005, you wrote: Hello, Can we use struts without using its taglibs ? We will just write plain JSPs. If yes how do we get the values into and from our ActionForms ? regards, Nitin __ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Typical Struts development team and distribution of tasks?
Good question! I barely can wait for answers from the other guys out there; cuz in what I saw so far, the Java Developers are supposed to be able to turn static visual models (often not even html) into Struts web applications, finding clever solutions (usually good ol' javascript) to UI designs that don't account for the nature of web applications (request/response interactions). So a Java [web] Developer must know a lot of html, css, javascript (and of course Struts tags / JSTL) or at least enough to know where to find solutions to particular problems... On the other hand, I'm just starting with Tapestry right now and beginning to see that it could really make possible starting with a static html design of a UI and enhancing it to become a dynamic web app. Also it provides an almost event-driven kind of framework... Also note that Shale is supposed that will support pretty much of the same design (components and events, but without the almost pure html templates), and even better, support for dialog-like interactions across multiple requests. At 18:38 11.03.2005, you wrote: Do most companies developing Struts applications tend to employ Web Designers, or is it more common for Struts development to be undertaken by a team consisting solely of Java Developers (who therefore need strong knowledge of HTML, Struts Tags, JSTL, CSS, JavaScript, etc as well as J2EE)? Along the same lines... If you are working in a mixed team of Web Designers and Java Developers, what is the best way to divide up Struts (+ Tiles) development between these groups? The reason I ask these questions is that the vast majority of my previous experience has been in back-end development (EJB, JMS, ORM, RDBMS, etc), and now that I am learning Struts I am more than a little bit confused as to what I'd be expected to know for the average Struts job... _ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: map-backed forms with multibox/multiselect lists?
That's great! Thanks for sharing.
Next time I'll know how to do it. Luckily you proved to be more
determined and finally solved it. Congratulations!
Nidel, Mike wrote:
The good news is that this DOES work.
I simply declared my methods to be
public void setFoo(String key, String[] foos)
{
...
}
public String[] getFoo(String key)
{
...
}
and everything works fine. It took a detour through the Struts
source (and ultimately from there through the beanutils source)
to figure this out, but the problem was essentially that when
doing the bean introspection, the beanutils first finds the getFoo()
method and stores its return type. It then looks for a setFoo()
method with the same argument type as the return type of getFoo().
If you try to return foo as an Object, it just won't work -- your
setter won't be found and the method will never be called.
thanks for the input,
Mike
-Original Message-
From: Radu Badita [mailto:[EMAIL PROTECTED]
Sent: Monday, March 07, 2005 11:10 AM
To: Struts Users Mailing List
Subject: RE: map-backed forms with multibox/multiselect lists?
I had the same problem some time ago (the solution vaguely
suggested by
Jack wouldn't had been an option since the properties were
dynamic so I
needed the key to distinguish between them). I asked on this
list for help
at that time, but didn't got an answer, so I guess nobody
succeeded in
doing something like this. Therefore I had to find some other
solution to
my problem...
I'm guessing this might be some sort of a problem with
commons-binutils
(although public void setFoos(String key, String[] foos)
isn't a valid
javabeans setter so maybe it's just a bit out of it's scope).
At 16:44 07.03.2005, you wrote:
This works fine for list-backed form items (which we also use)
but in this case I need something like
public void setFoos(String key, String[] foos)
is this possible?
There are several workarounds I can think of, but this appears
to be the cleanest solution if I can make it work.
Mike
-Original Message-
From: Dakota Jack [mailto:[EMAIL PROTECTED]
Sent: Monday, March 07, 2005 9:42 AM
To: Struts Users Mailing List
Subject: Re: map-backed forms with multibox/multiselect lists?
public void setFoos(String [] foos)
On Fri, 4 Mar 2005 18:55:53 + (UTC), Mike Nidel
[EMAIL PROTECTED] wrote:
I'm trying to build a form element that combines the
features of a map-backed
property with a multibox (and the same for a
multiple-selection list). I've made
multiboxes work fine without the map-backed element, but I
can't seem to get
this to work.
I've tried various method signatures in my form bean, but
to no avail. For
example, for a field called foo I have tried the following:
public void setFoo(String key, Object val)
{
...
}
or
public void setFoo(String key, String[] val)
{
...
}
I'm using a set of checkboxes on the JSP which should
result in a list of the
values of whichever boxes are selected. I can think of a
number of javascript
workarounds, as well as workarounds in my Action that go
directly to the request
parameters... but all of those are kludges and it seems
like there should be a
way to have multiple checkboxes that all reference a
map-backed form property.
Any thoughts?
thanks a bunch,
Mike Nidel
-
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You can lead a horse to water but you cannot make it float
on its back.
~Dakota Jack~
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RE: map-backed forms with multibox/multiselect lists?
I had the same problem some time ago (the solution vaguely suggested by
Jack wouldn't had been an option since the properties were dynamic so I
needed the key to distinguish between them). I asked on this list for help
at that time, but didn't got an answer, so I guess nobody succeeded in
doing something like this. Therefore I had to find some other solution to
my problem...
I'm guessing this might be some sort of a problem with commons-binutils
(although public void setFoos(String key, String[] foos) isn't a valid
javabeans setter so maybe it's just a bit out of it's scope).
At 16:44 07.03.2005, you wrote:
This works fine for list-backed form items (which we also use)
but in this case I need something like
public void setFoos(String key, String[] foos)
is this possible?
There are several workarounds I can think of, but this appears
to be the cleanest solution if I can make it work.
Mike
-Original Message-
From: Dakota Jack [mailto:[EMAIL PROTECTED]
Sent: Monday, March 07, 2005 9:42 AM
To: Struts Users Mailing List
Subject: Re: map-backed forms with multibox/multiselect lists?
public void setFoos(String [] foos)
On Fri, 4 Mar 2005 18:55:53 + (UTC), Mike Nidel
[EMAIL PROTECTED] wrote:
I'm trying to build a form element that combines the
features of a map-backed
property with a multibox (and the same for a
multiple-selection list). I've made
multiboxes work fine without the map-backed element, but I
can't seem to get
this to work.
I've tried various method signatures in my form bean, but
to no avail. For
example, for a field called foo I have tried the following:
public void setFoo(String key, Object val)
{
...
}
or
public void setFoo(String key, String[] val)
{
...
}
I'm using a set of checkboxes on the JSP which should
result in a list of the
values of whichever boxes are selected. I can think of a
number of javascript
workarounds, as well as workarounds in my Action that go
directly to the request
parameters... but all of those are kludges and it seems
like there should be a
way to have multiple checkboxes that all reference a
map-backed form property.
Any thoughts?
thanks a bunch,
Mike Nidel
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
You can lead a horse to water but you cannot make it float
on its back.
~Dakota Jack~
-
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Re: [Very OT] Hypothetical challege
Hi, there It happens that I'm having this same design problem today :-) (pretty interesting how things matched, huh?!) I totally agree with Wiebe here - his is the only reasonable work-around that i could imagine to this problem. I also thought about serializing the Handle, but i think it won't work because the stateful session with the SFSB could time-out while the web server restarts and until it will get called again. So I cannot see another way, other than persisting the HttpSession data until the same user logs-in again. But, maybe, someone else has another, even more interesting solution... Radu Wiebe de Jong wrote: The simple answer is to store all your session data in a database, with a cookie value as the key. When the client connects, get the cookie value, read the session data from the database, do your stuff, update the database, and respond to the user. This will create a permanent session, which will survive shutting down the browser, web server, app server, and whatever else. The session will only end when the user explicitly logs out and terminates the session. If you don't like the performance hit of going to the database every time, then add a plugin. When the application starts, the plugin will read all the sessions from the database into memory. When the application ends, the plugin would write out all the sessions to the database. Wiebe de Jong -Original Message- From: Chaikin, Yaakov Y. [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 26, 2005 12:37 PM To: 'Struts Users Mailing List' Subject: [Very OT] Hypothetical challege Hi, This is a hypothetical question, but it's interesting to me if anyone can come up with a solution and what that solution would be. A few facts and requirements: 1) Suppose you have 2 machines. One must serve as your web server and the other must serve as your EJB server. 2) Suppose you must keep track of some sort of session data for each client. How you store the session data is flexible to a point... You want to take advantage of stateful sessions for whatever reason (maybe your EJB server has more resources or something like that). 3) You obviously have a remote reference to your stateful session EJBObject in your web tier. 4) For whatever reason, you anticipate that you will want to restart your web server now and then while there will be some moderate traffic to it going on. Yet, you don't want to make all the clients lose their state. 5) You can use a cookie if you want to remember which client was which when the server restarts. 6) You have the option of storing the remote references to you stateful session EJBObject by getting EJBObject.getHandle() and storing it on the web server machine in a serialized form. 7) No, you can not buy another web server and cluster them! Let's say there is no more money left. How do you catch server/web app shutdown event with no non-portable code, so you can go through all your sessions and save the remote references to your stateful beans on the EJB tier on hard disk so when the server starts back up you would be able to restart the entire app without making the clients lose their state? Yes, this way of a contrived situation, but I am just very interested in how this could be accomplished. Anyone? Thanks, Yaakov. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Nested and javascript'
Sure it is a way to access those: just assign an unique id - maybe same as the name, but without the dots. At 13:56 13.01.2005, you wrote: Well, this is kinda off topic, but I thought that maybe some of you may ran into this problem. I have a nested text field. It's name is : destiny[0].airShip.name I need to use a javascript function to get this value. But document.forms[0].destiny[0].airShip.name will not work, which seems logical since those are not objects but a string generated by struts. Is there a way to access those properties? thanks - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: prevent reset of bean after submit
As Hubert pointed out: your form won't hold the state from your first.jsp unless you store it in session scope, as the request created on first.jsp submit will cease to exist after second.jsp is run. But if you really don't wanna keep it in user's session, the only workaround I see possible it's copying the properties from your first.jsp in hidden inputs in your second.jsp, this way the values will be introduced in the second request. On Tue, 28 Dec 2004 14:12:30 +0530, sachin [EMAIL PROTECTED] wrote: hi Cliff , You may consider put all the fields which are populated from frist.jsp in the second.jsp using hidden field. This is one solution and it helps .. only problem is that if the first.jsp have a number of fields then the second.jsp will be overloaded with that much number of hidden fields. and making the bean a session bean is also a solution , but it brings with some other problems in my project. I think there are so many solutions can solve this problem. Please if u know any other solution to this problem , it will help me design the project in a better way . . Regards, Sachin Hegde -- Original Message --- From: Cliff [EMAIL PROTECTED] To: struts-user@jakarta.apache.org Sent: Thu, 23 Dec 2004 02:21:16 - Subject: Re: prevent reset of bean after submit You may consider put all the fields which are populated from frist.jsp in the second.jsp using hidden field. I think there are so many solutions can solve this problem. Good Luck Merry Christmas Cliff --- In [EMAIL PROTECTED], Hubert Rabago [EMAIL PROTECTED] wrote: It's possible that you have your bean in request scope. If so, a new bean is being used for each request. Try putting your bean in session scope. Hubert On Tue, 21 Dec 2004 12:49:55 +0530, sachin [EMAIL PROTECTED] wrote: hi all , On submit of a form , struts resets the bean before populating the form . For that perticular action can i stop the resetting of bean ? in my application i need to pupulate one bean from two forms . It has following structure :- JSP pages - First.jsp , Second.jsp Actions - FirstAction.java , SecondAction.java which refer to same CommonBean. the commonBean is first populated from First.jsp then it is forwarded to Second.jsp to populate the remaining fields .. But here the commonBean gets resetted ... I tried to override reset action in CommonBean with a blank method .. but it not doing .. any help is appreciated Thanks in advance Regards, Sachin Hegde Software Developer Paradyne Infotech Limited Mumbai 022-38546711 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- End of Original Message --- - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Inheritance of DynaActionForms
Regarding the inheritance of DynaActionForms I've once read an very good and interesting article of someone who found an workaround. I don't have the url though, so maybe you'll get lucky with google ;-) Hi, I am looking for a Best practice of using the ActionForms. We are using lot of Forms(both ActionForm and DynaActionForms) in our application. All these Forms share some common properties and some validation logic is also common. Currently we are using the Inheritance in the ActionForms, to solve this requirement(Like we have a Super ActionForm and all the other ActionForms extend that Super ActionForm). I would like to know, is there any possibility with the DynaActionForms. I mean, we configure the properties of DynaActionForm in the struts-config.xml, is there a possibility that we can say that one DynaActionForm extends other DynaActionForm ? (with out replicating the properties in all DynaActionForms) As the struts-config.xml is an XML file, i guess we can imitate this by using the XML INCLUDES( we include the super DynaActionForm properties in the child DynaActionForms). Is there any configuration possible in struts-config.xml ? I wonder what are the advantages of DynaActionForms(whose properties are configured in struts-config.xml) over ActionForms(which are Java Classes created as JavaBeans) except the creation of extra java classes ? Thanks, Vijay. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: ActionMessage replacement keys ?
For the 99.9% of the situations I agree with you Jim, but when you do some kind of generic subsystem to reuse across applications it's very possible to need such behavior. Here might be arguable that such situations can be avoided, but still... you might end up presenting messages that are much too general to the user. At 17:53 21.12.2004, you wrote: -Original Message- From: Woodchuck [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 21, 2004 8:23 AM To: struts Subject: ActionMessage replacement keys ? hihi all, is everyone rolling their own helper function to use other message keys as replacement values when creating ActionMessage or ActionError objects? i'm wondering if there's a better way to do this other than getting the MessageResources object and calling the getMessage() function then putting the results into an object array and then passing this to the ActionMessage constructor... can/will this functionality be added to the ActionMessage object in the future? If you're talking about building a message using other keys, no. I generally find that I am better off using a seperate key for such situations. The problem I run usually into is one of syntax, especially with other languages. Breaking things up like that can make it harder to structure a well formed sentence. Since one of my pet peeves is messages that are not grammatically correct, I avoid this at all costs. Consider an English message translated into say German. IIRC there is a joke about a German teacher who ends every class with 5 minutes of verbs. Apparently German verb structure is different then English, so how would fit that structure into your messages? Or Navajo, which is completely different from any other language? Such flexibitlity in your messages might be nice from a programming standpoint, but could be a major pain when translating into foreign languages. So, my answer to your question is that I don't use message resource keys as arguments to my messages. In such cases I just use a different message key for each possibilty. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Missing message for key analystprofile.edit.screen.title
The problem here is the tag in your jsp: bean:message bundle=ANALYSTPROFILE_LABEL/ad key=analystprofile.edit.screen.title/ It should be: bean:message bundle=ANALYSTPROFILE_LABEL key=analystprofile.edit.screen.title/ Why without '/ad' ? you may ask. Probably the example you copied from is a Struts module named 'ad'; in such cases, when the message-resources tag is in a Struts module config, then /name-of-the-module is appended to the name of the messages resource. In your case, you are not in a module, so nothing gets appended to the name of the bundle. Hope it works. Good luck. Hi, I am new to struts and currently encountered these errors: Error 500--Internal Server Error javax.servlet.jsp.JspException: Missing message for key analystprofile.edit.screen.title In struts-config.xml message-resources key=ANALYSTPROFILE_LABEL parameter=resources.i18n.ad.analystprofile_labels/ in analystprofile_labels_en_GB.properties analystprofile.edit.screen.title=Edit Analyst Profile in the jsp titlebean:message bundle=ANALYSTPROFILE_LABEL/ad key=analystprofile.edit.screen.title//title I followed the example from other source, which is working in other machine. Any advice..? Thanks rgds, Yen LeadingSide (M) Sdn Bhd #29-11 The Boulevard Mid Valley City Lingkaran Syed Putra 59200 Kuala Lumpur, Malaysia Tel: +603 2287 9631/2 Fax: +603 2287 9630 Email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [ot] Naming generated files
I see no point in such design... That will be replicating the same data (the images) in two separate systems (your database and your file system) and keeping the two synchronized. Too much overhead for a simple problem. Why don't you just make your servlet simply output the images (read from the database based on the user's id) in the response (setting first the content-type to image/jpg or something appropriate). Then, in your html, you can simply put: image src=http://yourserver/pathtoyourservlet/ Regarding your java.io.File problem: I used it many times before to create files and it never added anything to the filename. Maybe you can send a snippet of the code where you create the filename... Is it something like '@' followed by a number the weird stuff what you get? Radu Mark Lowe wrote: Not really entirely a struts question but here seems as gooder place as any. To have the benefits of storing images in the database without having to write a byte array to an output stream, I figured have a servlet that lists all the blobs from a data base and then create files based on those at start up. And when new images are added perhaps generate them then. Likewise when deleting images from the database, then delete those files. The only problem I'm having is that the files I create using the java.io.File appends some weird shite to the file name when i need these to match exactly the uids and such like I'm trying to call them. Anyone had to deal with this before? Mark - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Problem downloading file
I have the same problem trying to do the same as Morales... To overcome
this, i've made a JSP (just because i was too lazy to write a Servlet
:) where I get the OutputStream from the response, set the content type
and content-disposintion:
response.setContentType(application/octet-stream);
response.setHeader(Content-Disposition, attachment; filename= +
exportedFile().getName() + ;);
then I output the content of the file.
Works perfectly in the browser, but in log i get:
org.apache.jasper.JasperException: getOutputStream called (probably
just as warning). I suppose that if I'll put a servlet instead of the
JSP, it won't throw this anymore.
Regards.
Morales de Frías wrote:
Hi¡
I already know that this problem have been resolved before, but i can't find
the solution searching in this post. (Or solutions founded don't help me).
I have an action that generates pdf files, and zip them. And i want to download
it... but i have two problems:
-- File that appears in dialog is Action'sNameA.do, no MyFile.zip
code is like this
-
if (gz.exists()) {
response.setContentType(application/zip);
response.setHeader(Content-Disposition,attachment; fichero=\ + nombreBaseFichero + \;);
response.setContentLength((int)gz.length());
ServletOutputStream sos;
sos = response.getOutputStream();
FileInputStream stream = new
FileInputStream(gz);
BufferedInputStream bis = new
BufferedInputStream(stream);
InputStream is = new BufferedInputStream(bis);
int count;
byte buf[] = new byte[4096];
while ((count = is.read(buf)) -1)
sos.write(buf, 0, count);
is.close();
sos.close();
}
-
--- Dialog appears two times, and next any action i take, download's dialog appears. I
read that action must return null but iit doesn't work.
Can you help me, please???
Thanks in advance.
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Re: Help with message resource on Struts module
Sadly, nobody gave me any useful help with this issue.
Fortunately I have found the answer myself looking at the DTD for
struts-config.xml files: The module prefix (if any) is appended to
the key (${key}${prefix}). So, in my JSP I should have written
something like:
bean:message bundle=mymodulekey/mymodule key=gs.filters.title/
On Fri, 19 Nov 2004 10:49:56 +0200, Radu Badita [EMAIL PROTECTED] wrote:
Actually you are right - it is a typo, but only in the email (in the real
files I have other names, and there are spelled right).
At 21:53 18.11.2004, you wrote:
Maybe this is just a typo but shouldn't you be using
'bundle=mymodulekey' instead of 'bundle=mymodule'?
bean:message bundle=mymodulekey key=gs.filters.title/
Radu Badita wrote:
Hello,
I have a Struts module with the following message bundle:
message-resources parameter=mymodule.Application key=mymodulekey /
Inside an Action I can get messages from it with:
dateFormat = getResources(request,mymodulekey).getMessage(date.format);
and it works fine. But this Action forwards to a jsp in which I have this
tag:
bean:message bundle=mymodule key=gs.filters.title/
it doesn't work because it cannot find the bundle in any scope.
Can anyone please help me with this? Maybe I don't use the bean:message
/ as it should be used...
Thanks
Radu
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Alternate bundle with ActionMessage
Hi, I have a problem related with using a keyed MessageResources in a module and creating an ActionMessage with keys from it. Sorry if it has been discussed before, but I haven't found anything searching the list... So here it is: in my module I have defined a message-resource with a key (let's say myresources) and when the form is validated I want to create an ActionMessage specifying a key from this resource. My question is how should I do this? If I manually get a message from the resource like this: String paramLabel = ((MessageResources) request.getSession().getServletContext() .getAttribute(Constants.MESSAGE_BUNDLE)) .getMessage(reports.param. + paramId + .prompt); it works fine. But how do I construct an ActionMessage with another key from it? - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [Validation] and local string insertion
I think the problem might be that you don't get the right
MessageResources. Here is what Struts API says about
public MessageResources getInternal() : Return the MessageResources
instance containing our internal message strings.
You should use:
MessageResources resources = request.getSession().getServletContext()
.getAttribute(Globals.MESSAGES_KEY));
to retrieve your bundle.
I hope this helps you.
On Thu, 18 Nov 2004 13:07:18 +0800, Corey Scott [EMAIL PROTECTED] wrote:
Sorry ... resend, I cant find the previous one in the mail archive and
I am not sure why the first one disappeared
-Corey
-- Forwarded message --
From: Corey Scott [EMAIL PROTECTED]
Date: Thu, 18 Nov 2004 01:36:54 +0800
Subject: [Validation] and local string insertion
To: [EMAIL PROTECTED]
Hi,
I have been trying to achieve the same in my validate method to the
following extract from me validation.xml
form name=UpdateTaskForm
field property=txtTaskSummary
depends=required
msg
name=required
key=stdError.missing/
arg0 key=UpdateTaskForm.txtTaskSummary/
/field
/form
Extract from my message bundle:
stdError.required.field=Please enter/choose a {0}
UpdateTaskForm.txtTaskSummary=Task Summary
My validate method:
public ActionErrors validate(
ActionMapping mapping,
HttpServletRequest request)
{
ActionErrors errors = new ActionErrors();
if ((this.txtTaskSummary == null)
|| (this.txtTaskSummary.length() == 0))
{
MessageResources resources = this.getServlet().getInternal();
errors.add(
txtTaskSummary,
new ActionMessage(
stdError.required.field,
resources.getMessage( request.getLocale(),
UpdateTaskForm.txtTaskSummary)));
}
return errors;
}
Hopefully it is clear that I am trying get an output similar to:
Please enter/choose a Task Summary
But all I can get is:
Please enter/choose a {0} // without the whole get resources stuff
or
Please enter/choose a null //code above
I am getting the impression I am very much off track, any help would be great.
Thanks,
Corey
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Re: Help with message resource on Struts module
Actually you are right - it is a typo, but only in the email (in the real files I have other names, and there are spelled right). At 21:53 18.11.2004, you wrote: Maybe this is just a typo but shouldn't you be using 'bundle=mymodulekey' instead of 'bundle=mymodule'? bean:message bundle=mymodulekey key=gs.filters.title/ Radu Badita wrote: Hello, I have a Struts module with the following message bundle: message-resources parameter=mymodule.Application key=mymodulekey / Inside an Action I can get messages from it with: dateFormat = getResources(request,mymodulekey).getMessage(date.format); and it works fine. But this Action forwards to a jsp in which I have this tag: bean:message bundle=mymodule key=gs.filters.title/ it doesn't work because it cannot find the bundle in any scope. Can anyone please help me with this? Maybe I don't use the bean:message / as it should be used... Thanks Radu - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Help with message resource on Struts module
Hello, I have a Struts module with the following message bundle: message-resources parameter=mymodule.Application key=mymodulekey / Inside an Action I can get messages from it with: dateFormat = getResources(request,mymodulekey).getMessage(date.format); and it works fine. But this Action forwards to a jsp in which I have this tag: bean:message bundle=mymodule key=gs.filters.title/ it doesn't work because it cannot find the bundle in any scope. Can anyone please help me with this? Maybe I don't use the bean:message / as it should be used... Thanks Radu - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Question about multiple fields in forms
Hi, It could be done using indexed properties and nested properties. Take a look at: http://struts.apache.org/faqs/indexedprops.html You can find lots of threads on this. On Fri, 12 Nov 2004 11:15:45 +0100, Hevia Vega, Andrés [EMAIL PROTECTED] wrote: Hi, We have a dynamic table that we would like to submit to an action. The number of columns and records are unknown. Is there any built in mechanism or trick in Struts that we can use in order to do this? A possible solution is to use arrays of fields that are send to the action: Cheers, - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Radu Badita Galati, Romania Phone : 004-0745-36.10.17 Email : [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How use the BeanUtils and interface converts
A simpler alternative to that approach would be to simply make an
additional setter method in you bean (and getter if appropriate) for
your Date member which takes a String, parses it (preferably according
to the user's Locale) and sets your Date member. The form data should
be first validated, otherwise you'll get a ParseException.
I hope this is useful to you.
On Fri, 5 Nov 2004 09:46:06 -0600, Joe Germuska [EMAIL PROTECTED] wrote:
Writing a date converter is pretty simple; the
only reason there isn't one included in the
beanutils distribution is that there's not a very
easy way to configure the date format in a
universal way.
Below is an example. This one is implemented as
a static inner class within the only class which
uses it, but you could do it differently:
static class SimpleDateFormatDateConverter
implements org.apache.commons.beanutils.Converter
{
String dateFormat = null;
SimpleDateFormatDateConverter(String dateFormat)
{
this.dateFormat = dateFormat;
}
public Object convert(Class clazz, Object obj)
{
if (obj == null) return null;
if (obj instanceof java.util.Date) return obj;
String toParse = obj.toString();
if (toParse.trim().length() == 0) return null;
java.text.SimpleDateFormat fmt = new
java.text.SimpleDateFormat(dateFormat);
try
{
return fmt.parse(obj.toString());
}
catch (Exception ex)
{
throw new
org.apache.commons.beanutils.ConversionException(ex);
}
}
}
Then, elsewhere in your Java code, you would
register the converter doing something like this:
String dateFormat = -MM-dd;
ConvertUtils.register(new
SimpleDateFormatDateConverter(dateFormat),
java.util.Date.class);
Since this code was written, beanutils has made
good progress away from using static methods for
everything, which makes it easier to have
Converters in different parts of your app that
behave differently. See
http://jakarta.apache.org/commons/beanutils/api/index.html
and more specifically
http://jakarta.apache.org/commons/beanutils/api/org/apache/commons/beanutils/BeanUtilsBean.html#BeanUtilsBean(org.apache.commons.beanutils.ConvertUtilsBean,%20org.apache.commons.beanutils.PropertyUtilsBean)
for the doc details.
Joe
At 12:13 PM -0300 11/5/04, Gabriel França Campolina wrote:
Hi,
I'd like know how I can use BeanUtils.copyProperties(form, model),
when I my objects have name equals but types noequals, example, in my
form I have a attribuite named dateInsert of type string, but in my
model I have this attribuite of the type java.util.Date. How I
specified to BeanUtils this type of conversion. I read some articles
in internet saw that I can implements a inteface converter, but i
don't know use. SomeBody can hope me, with link or example use this
classe???
Thanks folks,
--
Gabriel França Campolina
Sun Certified Programmer for the Java 2 Plataform
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--
Joe Germuska
[EMAIL PROTECTED]
http://blog.germuska.com
In fact, when I die, if I don't hear 'A Love
Supreme,' I'll turn back; I'll know I'm in the
wrong place.
- Carlos Santana
--
Radu Badita
Galati, Romania
Phone : 004-0745-36.10.17
Email : [EMAIL PROTECTED]
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Re: How to use getServletConfig( ) outside a Servlet.
Hi, I had a problem similar to yours, and here is how I solved it: 1. made a Struts PlugIn (a class that implements org.apache.struts.action.PlugIn) and has a method init(ActionServlet , ModuleConfig) and a String property (let's say configFileName). The property will be automatically set by Struts at startup, and then the init(...) method will be called. 2. in the init(...) method I read the file: InputStream is = actionServlet.getServletContext().getResourceAsStream(configFileName); 3. the config file name is set from the struts-config.xml as follows: plug-in className=mypackage.MyPlugIn set-property value=/WEB-INF/config.xml property=configFileName/ /plug-in This should work for you, too. Good luck! :-) On Fri, 05 Nov 2004 17:28:25 +0100, Morkeleb [EMAIL PROTECTED] wrote: Hi. I want to make a static class which access a configuration file in /WEB-INF/. I tried Classname.class.getResourceAsStream(/WEB-INF/config-file.xml); but it wont work. So I thought I have to do it by using getServletConfig().getServletContext( ).getResourceAsStream(/WEB-INF/config-file.xml) but I did not figure out how to do that because getServletCofig only works in Servlets, not in static beans. Can you help me? Thanx in Advance, Lukas - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Radu Badita Galati, Romania Phone : 004-0745-36.10.17 Email : [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Map-backed form property and multi-select
Hi, I'm using a map-backed property to get the data from a run-time generated form. If one of the controls in the form is a multi-select, I only get the first selected option. The form definition: form-bean name=myForm type=test.MyForm form-property name=paramValue type=java.util.Map/ ... /form-bean Setter method: public void setParamValue(String paramId, Object value) The select: html:select property=paramValue(%=paramName%) multiple=true html:options collection=entryes property=key labelProperty=value/ /html:select The setter is called only once having a String for value, even if I select multiple options. Can anyone please give me a hint? Thanks -- Radu - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
