LookupDispatchAction qustion: how to name the method
Hi, Still strugling with the LookupDispatchAction. I got this error message: javax.servlet.ServletException: Action[/admin/OrgAction] missing resource 'button.list' in key method map . I suspect that there is something wrong with the string I used. Here is what I aming doing: 1. ApplicationResources.properties button.list=List 2. MethodLookups.properties button.list=list 3. JSP file html:submit property=method bean:message key=button.list/ /html:submit 4. In getKeyMethodMap() ResourceBundle methods = ResourceBundle.getBundleLookupMethods,Locale.ENGLISH); 5. I have list() in MyAction() the request is http://?method=list; Are there anything wrong ? many thanks li xin __ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
I suspect this is a bad idea...so what's a better one?
I got tired of, in all my action classes, beginning with something to
get a database connection and at the end destroy it. I want to automate
this a bit.
Here is a first shot at what I came with:
In my subclass of whatever flavor of Action I'm using, a have a
protected variable which holds my Persistence class object. My subclass
implements execute() such that it will instantiate the persistence
object, assign it to the protected class variable and call
super.execute(), getting rid of the connection afterwards. The action
methods themselves just refer to the protected class variable, rather
than doing anything to generate/obtain it itself.
Now, I can only count on this working if, and only if, the Action class
itself got instantiated for the purpose of processing the request, and
destroyed afterward (otherwise the protected variable is going to get
shared between requests). Am I safe here?
If not, I suppose I could make it a ThreadLocal, but then I'd just be
replacing the create/destroy steps with a casting step. And since my
goal here is to try abd have all the work done outside of the real
methods, that's kind of self-defeating. Same holds true with using
request.setAttribute() instead. Ideally the persistence layer shouldn't
have to know it's in a web application, so I'd like to not have to pass
in a request object to it at any point.
Am I safe with my first guess? (I suspect not). Failing that, what's a
better idea?
TIA
-Joe
-Basically what I have now is something like this-
protected Persistence persistence;
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws
Exception {
persistence = ActionHelper.getPersistenceObject(request);
ActionForward result = super.execute(mapping, form, request,
response);
persistence.release();
return result;
}
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File upload problem
A colleague gave me a nice file upload Servlet to use; it uses the jakarta commons file upload classes. I am trying to convert it to a Struts Action class. Converting the Servlet's doPost method to work in the Action class has not been a problem. The problem is with the source JSP. If I use html:form/html:file in the source JSP, the upload does not work -- DiskFileUpload.parseRequest returns zero FileItems. !-- doesn't work -- html:form action=/upload enctype=multipart/form-data html:file property=theFile/ /html:form Even if I change the html:file tag to a regular HTML input tag, and use a form bean that is just an empty class, it still doesn't work. !-- doesn't work -- html:form action=/upload enctype=multipart/form-data input type=file name=theFile/ /html:form If I change the html:form tag to be a regular HTML form tag, and change my struts-config action mapping so that it doesn't associate a form bean at all, everything works -- DiskFileUpload.parseRequest now returns 1 FileItem. !-- combined with a no-form action, works -- form action=/context/upload method=POST enctype=multipart/form-data input type=file name=theFile/ /form I assume that using a form bean at all is screwing this up, but I'm perhaps too tired to understand why. I couldn't really surmise by looking at the upload example that comes with Struts, as it appears to use a different technique for the upload implementation (not DiskFileUpload, etc.). How can I make the source JSP work with my Action class and at the same time use the struts tags and an associated form bean, so that I can take advantage of validation, etc.? Thanks, Erik - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: I suspect this is a bad idea...so what's a better one?
On Sun, 8 Aug 2004 03:23:35 -0400, Joe Hertz [EMAIL PROTECTED] wrote:
[snip]
Now, I can only count on this working if, and only if, the Action class
itself got instantiated for the purpose of processing the request, and
destroyed afterward (otherwise the protected variable is going to get
shared between requests). Am I safe here?
You are not safe here ... there is one and only one instance of each
Action, shared by all requests through the lifetime of the web
application.
If not, I suppose I could make it a ThreadLocal, but then I'd just be
replacing the create/destroy steps with a casting step. And since my
goal here is to try abd have all the work done outside of the real
methods, that's kind of self-defeating. Same holds true with using
request.setAttribute() instead. Ideally the persistence layer shouldn't
have to know it's in a web application, so I'd like to not have to pass
in a request object to it at any point.
Am I safe with my first guess? (I suspect not). Failing that, what's a
better idea?
A useful design pattern for something like this is to create a common
subclass for your actions that does the setup/teardown work in the
execute() method, and then delegates to the action-specific work in
some other method. For your scenario, it might look like this:
public abstract class BaseAction extends Action {
public ActionForward execute(...) throws Exception {
Persistence persistence =
ActionHelper.getPersistenceObject(request);
try {
ActionForward forward = delegate(mapping, form,
request, response, persistence);
} finally {
persistence.release)(;
}
}
protected abstract ActionForward delegate(ActionMapping
mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response,
Persistence persistence)
throws Exception;
}
Then, your real business logic is implemented in a delegate() method
that is passed in for you, and you never have to remember to allocate
and release the persistence object.
public class RealAction extends BaseAction {
protected ActionForward delegate(...) {
... use the persistence object as needed ...
}
}
This is pretty close to what you've got now ... the key difference is
that it uses a local variable instead of an instance variable to avoid
sharing problems. Also, because of the finally clause, it also
ensures that the persistence object is cleaned up, even if the
delegate() method throws an exception.
Craig
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Re: File upload problem
Craig McClanahan wrote: On Sun, 08 Aug 2004 06:37:33 -0400, Erik Weber [EMAIL PROTECTED] wrote: A colleague gave me a nice file upload Servlet to use; it uses the jakarta commons file upload classes. Is there a particular reason that you're not using the standard Struts support for file upload (also based on Commons FileUpload but already integrated into Struts)? The struts-upload.war (Struts 1.1) or struts-examples.war (Struts 1.2) webapp contains examples of using this feature. Craig - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Hi, with tha i always get a duplicate entry in classpath error when tomcat is loading the context (jdk 1.4.04). Does anybody know why? regards axel - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: File upload problem
Well the idea was to save time, since the upload Servlet already was working. I think I see the connection now -- it seems that FormFile is where the Commons implementation is lurking, whereas the Servlet works directly with FileItem objects. It is tough to make the connection to Commons FileUpload just by looking at those Struts examples, and I didn't want to reimplement features that DiskFileUpload gave me (such as the memory management/tmp dir). So I was trying to figure out how to use FormFile in my form, but somehow work with DiskFileUpload in myAction class. Probably not worth the trouble (but someone please let me know if you have done this or if there is a good reason to). I'll try handling the input stream myself with FormFile as the example shows. But that Commons FileUpload API is nice to work with. Thanks, Erik Craig McClanahan wrote: On Sun, 08 Aug 2004 06:37:33 -0400, Erik Weber [EMAIL PROTECTED] wrote: A colleague gave me a nice file upload Servlet to use; it uses the jakarta commons file upload classes. Is there a particular reason that you're not using the standard Struts support for file upload (also based on Commons FileUpload but already integrated into Struts)? The struts-upload.war (Struts 1.1) or struts-examples.war (Struts 1.2) webapp contains examples of using this feature. Craig - 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]
varying form element types using struts
I am creating a Struts form with some dynamically populated drop down lists. There is a general requirement that any drop down that contains just a single element should display as free html text instead of as a drop down. Is there any way to specify this type of variation using struts? Regards Victor - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Trying to highlate error causing fields
I'm trying to use #3 on this page: http://www.niallp.pwp.blueyonder.co.uk/. It is a tag library that I'm trying to use with my struts web app. But I have no clue how to use the class file he provided. I don't know where to put it at compile time, and it has a different package name than my current project (package lib.framework.taglib;) - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
ot: testing a forum - join?
I am testing a forum, that should be for advanced developers and people interested in operating RiA/SoA. If you want to help or are interested, please join baseBeans.com forum. I will be keeping it up to date on RiA/SoA. .V - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[ANN] Providers 0.5 Released
We have released the version 0.5 of Providers. Providers is a Struts extension that allows you to manipulate select options easily. This new version comes with some enhancements in ComboSelectTag (a tag to create dependant drop down lists) allowing you to set in each select a provider (in the previous version you need to create a matrix, and now this is no longer needed). You can download providers from https://sourceforge.net/project/showfiles.php?group_id=99364 https://sourceforge.net/project/showfiles.php?group_id=99364package_id =106580release_id=259054 package_id=106580release_id=259054 And can get some documentation or information (examples included) at http://providers.sourceforge.net/ Check out the ComboSelect example at http://providers.sourceforge.net/examples.html to see how you can create dependant drop down lists just defining some providers that collects data from your database. If you need more information please contact us or use the providers sf.net forums. Cheers. Guillermo.
Re: Struts, checkbox and optionally displaytag
Hi !
From your question, I guess that you need a multiple of checkboxes, so
you need html:multibox instead of html:checkbox
for your reference:
http://struts.apache.org/userGuide/struts-html.html#multibox
and a wonderful example:
http://j2ee.lagnada.com/struts/multibox-example1.htm
you would need an action form, which contains 2 arrays (normally they
would be String array)
eg. an Action form called FrmMultiBox with properties :
String [] options; String[] selected;
options[] is holding the options of the checkboxes that user going to select
selected[] would be populated by Struts after form submission, value
of selected[] is the value of checked checkboxes.
so if options = new String {1, 2, 3} (you can made them final or
load the values from another Action dynamically from somewhere else)
in your JSP:
struts-logic:iterate id=_bean name=FrmMultiBox property=options
struts-html:multibox property=selected
struts-bean:write name=_bean/
/struts-html:multibox
struts-bean:write name=_bean/
/struts-logic:iterate
if user check 1 and 3 then selected[] would contains 1 and 3
(Thanks Struts !)
and don't forget the formal getter and setter method of your Action form
Hope this help
Regards
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RE: null pointer --org.apache.commons.digester.Digester.getXMLReader(Digester.java:902)
Could you please check web.xml file, specifically if any hardcoded path is defined over there. - regards Raj (+91-11-31261821) -Original Message- From: Shilpa Nalgonda [mailto:[EMAIL PROTECTED] Sent: Friday, August 06, 2004 9:53 PM To: Struts Users Mailing List Subject: FW: null pointer --org.apache.commons.digester.Digester.getXMLReader(Digester.java:902) I am trying to deploy my prototype shoppingcart application onto linux environment , i am using apache tomcat4.0.4, and struts 1.1. The same application was deployed successfully on windows. I have copied prototype.war into /var/lib/tomcat4/webapps. restarted tomcat as /etc/init.d/tomcat4 restart and it does not work. I please help. And i get this error in log file :...localhost_log.2004-08-06.txt == 2004-08-06 03:32:25 StandardContext[/prototype]: Servlet /prototype threw load() exception javax.servlet.ServletException: Servlet.init() for servlet action threw exceptio n at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper. java:946) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:81 0) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContex t.java:3279) at org.apache.catalina.core.StandardContext.start(StandardContext.java:3 421) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:78 5) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:478) at org.apache.catalina.core.StandardHost.install(StandardHost.java:738) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:324 ) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:389) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java :232) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl eSupport.java:155) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1131) at org.apache.catalina.core.StandardHost.start(StandardHost.java:638) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343 ) at org.apache.catalina.core.StandardService.start(StandardService.java:3 88) at org.apache.catalina.core.StandardServer.start(StandardServer.java:506 ) at org.apache.catalina.startup.Catalina.start(Catalina.java:781) at org.apache.catalina.startup.Catalina.execute(Catalina.java:681) at org.apache.catalina.startup.Catalina.process(Catalina.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243) - Root Cause - - Root Cause - java.lang.NullPointerException at org.apache.commons.digester.Digester.getXMLReader(Digester.java:902) at org.apache.commons.digester.Digester.parse(Digester.java:1567) at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java :1433) at org.apache.struts.action.ActionServlet.init(ActionServlet.java:466) at javax.servlet.GenericServlet.init(GenericServlet.java:258) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper. java:918) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:81 0) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContex t.java:3279) at org.apache.catalina.core.StandardContext.start(StandardContext.java:3 421) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:78 5) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:478) at org.apache.catalina.core.StandardHost.install(StandardHost.java:738) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:324 ) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:389) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java :232) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl eSupport.java:155) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1131) at org.apache.catalina.core.StandardHost.start(StandardHost.java:638) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343 ) at org.apache.catalina.core.StandardService.start(StandardService.java:3 88) at org.apache.catalina.core.StandardServer.start(StandardServer.java:506 )
Re: Module and pages Behind WEB-INF don't work...???
Thanks for the help..yes it works that way...!!! Puneet Agarwal Tata Consultancy Services Mailto: [EMAIL PROTECTED] Website: http://www.tcs.com Jurn Ho [EMAIL PROTECTED] 07/29/2004 07:06 PM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To Struts Users Mailing List [EMAIL PROTECTED] cc Subject Re: Module and pages Behind WEB-INF don't work...??? Hi Puneet, I was just playing with hiding JSP beneath WEB-INF/ and Modules today. What you can do is edit your struts-module-config.xml and as part of the controller you can add the forwardPattern property e.g. My setup is set-property property=forwardPattern value=/WEB-INF/jsp$M$P/, so that my forward paths don't contain the WEB-INF/jsp read section 5.2.1 at http://struts.apache.org/userGuide/configuration.html $M is module, and $P is path By default it is $M$P like you have found out, but you're probably after $P. I think you might need to add this to each struts module config.xml that you do. Does anyone know if you can set default controller properties for all modules-config.xml? cya, Jurn At 04:48 PM 29/07/2004, [EMAIL PROTECTED] wrote: I want to do both hide my JSPs behind WEB-INF and use Struts modules. and this does not work, I looked into the struts code. it does the following If the path of ActionForward starts with /, it obtains the module prefix and prefixes this to the path so... If my path was say /WEB-INF/pages/INY0010S.jsp it becomes /iny/WEB-INF/pages/INY0010S.jsp ( which is unwanted..I wanted.../WEB-INF/pages/INY0010S.jsp ) but if the path of ActionForward does not start with /, it leaves the path as it is ( i.e. does not prefix the module-prefix) but then the requested URI becomes like this http://ipaddress:port/web-context-rootActionForward-path instead of http://ipaddress:port/web-context-root/ActionForward-path so the problem is there is no slash - / before ActionForward-path so if my path was WEB-INF/pages/INY0010S.jsp it searches for http://ipaddress:port/web-context-rootWEB-INF/pages/INY0010S.jsp which gives error...Can anyone suggest the way out..? or does this require a fix ? only a Quick resolution of this will be able help. Regards, Puneet Agarwal Tata Consultancy Services Mailto: [EMAIL PROTECTED] Website: http://www.tcs.com - 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] ForwardSourceID:NT3BD2 DISCLAIMER: The information contained in this message is intended only and solely for the addressed individual or entity indicated in this message and for the exclusive use of the said addressed individual or entity indicated in this message (or responsible for delivery of the message to such person) and may contain legally privileged and confidential information belonging to Tata Consultancy Services. It must not be printed, read, copied, disclosed, forwarded, distributed or used (in whatsoever manner) by any person other than the addressee. Unauthorized use, disclosure or copying is strictly prohibited and may constitute unlawful act and can possibly attract legal action, civil and/or criminal. The contents of this message need not necessarily reflect or endorse the views of Tata Consultancy Services on any subject matter.] Any action taken or omitted to be taken based on this message is entirely at your risk and neither the originator of this message nor Tata Consultancy Services takes any responsibility or liability towards the same. Opinions, conclusions and any other information contained in this message that do not relate to the official business of Tata Consultancy Services shall be understood as neither given nor endorsed by Tata Consultancy Services or any affiliate of Tata Consultancy Services. If you have received this message in error, you should destroy this message and may please notify the sender by e-mail. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
