Re: How does one get an instance of the GenericDataSource?
I've adapted to Struts the first JDBC example from Core Servlets and JavaServer Pages by Marty Hall http://coreservlets.com/ . There's a ZIP available for download at http://husted.com/about/struts/ . Comments are of course welcome. The Struts treatment is only meant to be as robust as Hall's original example (see http://coreservlets.com - chapter 18). I'd be interested in any experience anyone has had with getting more of the business logic out of the Struts Actions. In a relational DBMS application, most of the real business logic is expressed in the SQL statements, and so it might be enough to just store the SQL statements in a seperate resource could be used by another (non-Web) application. Thoughts? fruits readme = This is a simple Struts adaption of the first JDBC example from Core Servlets and JavaServer Pages by Marty Hall http://coreservlets.com/ . Prequesites are a Servlet/JSP container, like Tomcat 3.2 and MySQL. To start, enter http://localhost:8080/coreservlets-jdbc/fruitCreation.do This should create a test table in your MySQL installation, and then retrieve and display a sample report. See WEB-INF/struts-config.xml for more about setting up MySQL. You can also configure for another JDBC from here. Java 2 binaries (JDK 1.2.2) are included, along with a sample build.xml for Ant. (See jakarta.apache.org for more about Ant.) The build file is setup to copy the class files to the webapps folder, so you may need to edit the path for it to work with your installation. To build, you will also need j2ee.jar in your classpath. You can get this from the jd2sdkee. This is setup as a ZIP file that you can extract to your webapps folder for now. WAR to follow. -- Ted Husted, 2000-DEC-27 [EMAIL PROTECTED] .
Re: Help: logic:iterate and form input fields
A clear statement of what you need to accomplish, without posing a particular implementation, might be helpful. I'm not exactly sure what it is you need to do. My first guess is that the part about "count" should be encapsulated in a bean, and not exposed to the JSP. But I'm not sure if I understand the business or application logic behind your question well enough. *** REPLY SEPARATOR ***On 12/27/2000 at 8:51 AM Chandan Kulkarni wrote: Actually OrderItem is an object with several fields. I trimmed it down to just one field to simplify the problem. So "items" is an ArrayList of OrderItems. I couldn't find the right combination of nested/indexed property names for the form:text tag to generate the correct input tag. Here's what I tried... form:text name="orderItems" property="%= "orderitems[" + count + "]" %" value="%= ((OrderItem)orderlist).getItemNumber() %" / When it can't find the correct property name in the bean it gives a compilation error.I used a run-time expression to create items[0].itemName. In this case the form:text tag is just ignored and is left in the html generated just as is... It seems the only way to use an indexed/nested property name is to use the input tag itself. I am using the struts 12/15 build Thanks, -Chandan -Original Message-From: Ted Husted [EMAIL PROTECTED]To: Struts List [EMAIL PROTECTED]Date: Tuesday, December 26, 2000 4:32 PMSubject: Re: Help: logic:iterate and form input fields If I understand the situation, you might be able to do this with an array of orderItem beans (orderItems), with getName and getValue methods. logic:iterate name="orderItems" id="orderItem" tr TD form:text name="orderItem" / /td /TR/logic:iterate form:text should then call getName and getValue for the name and value of each text field. getName might use and internal counter to give the text fields different names. *** REPLY SEPARATOR ***On 12/26/2000 at 3:50 PM Chandan Kulkarni wrote: I am trying to use logic:iterate to iterate through a list of order items.I cannot get it to work. I have seen several emails about patches for handling nested and indexed properties... OrderForm consists of an ArrayList of items. I have added indexed getters ArrayList getItems()and OrderItem getItems(int index) I can't see how an indexed setter would help for setting the properties of OrderItems. Here are partsof my orderform.jsp== form:form action="orderform.do" name="orderform" type="OrderForm" TABLETRTD Order Number : /TDTD form:text name="orderform" property="orderNumber" / /TD/TR ...% int count=0; %logic:iterate id="orderlist" name="orderform" property="items" length="2"tr TD form:text name="orderlist" property="itemNumber" value="%= ((OrderItem)orderlist).getItemNumber() %" / /td /TR% count++; %/logic:iterate form:submit//form:form== Unfortunately this generates input tags with identical names for each iteration. This is a problem when you try to set the properties in the items.The value= part of the form:text tag is a hack to get the values from the Bean. Since the name generated needs to be unique I replaced the form:text lines with input tags like this: input TYPE="TEXT" name="%= "items.itemName[" + count++ + "]" %" value="%= ((OrderItem)orderlist).getItemName() %" / the run-time expression used above cannot be used in the form:text property value, so you have to use the input tag. This still does not allow for setting the values in the OrderItem... Also what do you think of the name used above...should it be items[0].itemName (more semantically correct - I think) or should it be items.itemName[0]... I have tried both but that doesn't work... Does anyone have any pointers/suggestions to get this to work...? Thanks in advance -Chandan
Re: Help: logic:iterate and form input fields
Are youtrying to do something like this order form (Javascript) https://public.wxxi.org/schedules/fm/voice-order.htm This only shows one item, but the idea is that there would be one line for each item in a small inventory. -- Ted Husted, Husted dot Com, Fairport NY USA. -- Custom Software ~ Technical Services. -- Tel 716 425-0252; Fax 716 223-2506. -- http://www.husted.com/
Can't Connect to PostgreSQL with struts-example on Orion App Server
Can someone tell me what I'm missing? In web.xml I have: servlet servlet-namedatabase/servlet-name servlet-classorg.apache.struts.example.DatabaseServlet/servlet-class init-param param-namedebug/param-name param-value2/param-value /init-param load-on-startup1/load-on-startup /servlet In struts-config.xml I have: data-source autoCommit="false" description="Example Data Source Configuration" driverClass="org.postgresql.Driver" maxCount="4" minCount="2" password="password" url="jdbc:postgresql://localhost/galacy" user="galacy" / I know that my postgresql.jar is OK and have tried a connection successfully with the jdbc URL above. When I go to localhost/struts-example I get: ERROR: User database not loaded -- check servlet container logs for error messages What's weird is that since I have debug=2 I should see some log() statements about connecting to PostgreSQL. I get nothing in my log. The only thing I see on my console is: New org.apache.struts.util.GenericDataSource Set org.apache.struts.util.GenericDataSource properties Call org.apache.struts.action.ActionServlet.setDataSource(GenericDataSource[activ eCount=0, autoCommit=false, closed=false, description=Example Data Source Configuration, driverClass=org.postgresql.Driver, loginTimeout=0, maxCount=4, minCount=2, password=password, readOnly=false, url=jdbc:postgresql://localhost/galacy, useCount=0, user=galacy]) Pop org.apache.struts.util.GenericDataSource Any ideas? Thanks.
RE: Proposal: RetroFit Struts with the Delegation Event Model
I agree - I would like to see the inclusion of events for any and all interesting events. I think the following article link may be of some interest as well: http://www.sys-con.com/java/archives/0601/grant/ It includes an interesting implementation of events for template based processing - for pre and post processing of jsp includes. I like the concepts of a Document class and ModelContext. Personally, I would like to see a View class/interface and ViewContext and Controller class/interface and Controller Context as well. Coupled with appropriate event subscriptions and notifications Struts would more closely resemble the original MVC model. It would be interesting to use this notification mechanism to allow for multiple Views to be notified of Model Change Events. This would open the door ( a little wider at least ) for other types of application development such as B2B. The controller seems the appropriate place from which to fire events. * Single ActionEvent class, or subclasses for various types of events that have different properties (some events care about the current ActionMapping and some don't). Subclasses * SIngle registrations of ActionListeners that receive all types of events, or separate registrations for separate event families? Seperate event listener registrations for event families seems the cleanest implementation and would eliminate event-storm like activity. * An ActionEvent, or the ActionListener that receives it, should have knowledge of the ActionServlet it is associated with, to provide access to underlying resources provided by the servlet. (The whole event listener model is intimately tied to Struts anyway, so this does not seem onerous). This would be a good place for the Controller class/interface and ControllerContext. Just my 2 cents. Thanks, Larry -Original Message- From: Craig R. McClanahan To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: 12/26/00 9:57 PM Subject: Re: Proposal: RetroFit Struts with the Delegation Event Model I like the basic idea of event listeners for Struts events. About the particular proposal, though, I've got some comments and questions I would like feedback on. * As fleshed out, the only events reported with this model so far are before and after an Action's perform() method is called. The abstract talks about building listeners for all "interesting" events. If we're going to do a listeners model, I think we should extend it to basically all of the processXxx methods, not just processPerform(). * If we go with generalized events, putting the firing logic inside Action seems wrong -- general purpose support classes, or public methods inside ActionServlet, seem more appropriate. * Given that there will be many more events, we've got some representation choices: * Single ActionEvent class, or subclasses for various types of events that have different properties (some events care about the current ActionMapping and some don't). * SIngle registrations of ActionListeners that receive all types of events, or separate registrations for separate event families? * I also have a couple of nit-picky type thoughts: * Event type codes inside the ActionEvent seem redundant, given that the type is implicitly defined by which listener method you call. * An ActionEvent, or the ActionListener that receives it, should have knowledge of the ActionServlet it is associated with, to provide access to underlying resources provided by the servlet. (The whole event listener model is intimately tied to Struts anyway, so this does not seem onerous). * We need to use collection classes (with an implementation I'm currently working on) that do not require lots of synchronization locks or new object creations when processing event notifications, since they happen on every request. Thoughts? Craig David Geary wrote: ABSTRACT It's often convenient, and sometimes necessary, to handle Struts events, such as when an action has its locale set, or when the action servlet processes an action's form. This document proposes retrofitting Struts with the delegation event model. That model, which is used by the AWT and Swing, makes event handling simple, flexible, and scalable. CREDITS Delegation and Event Model for Struts? -- posted to struts-dev by Robert Leland INTRODUCTION Currently, you can use inheritance to handle Struts events like those described above. Typically, that means extending ActionServlet and overriding a protected method, such as ActionServlet.processActionPerform. Inheritance-based event handling is inflexible and does not scale well because event sources and listeners are tightly coupled at compile time. This was evident to AWT engineers, who replaced the AWT's original inheritance-based event model
Null Pointer Exception in Stuts 0.5 example
Hi. I am new to using struts. I requested the FAQ for this mailgroup and apparently there isn't one. I am using version 0.5 with Weblogic5.1 and trying to run the example application. I am getting the following stacktrace. It seems the ApplicationResources.properties files is not being found? I put this in the org.apache.stuts.example directory with the .class files? ANy help you can give is much appreciated. Wed Dec 27 08:46:26 PST 2000:E ServletContext-General Root cause of ServletException java.lang.NullPointerException at weblogic.servlet.jsp.PageContextImpl.getAttribute(PageContextImpl.java:159) at org.apache.struts.taglib.IfAttributeMissingTag.doStartTag(IfAttributeMissing Tag.java:94) at jsp.index_45_example._jspService(index_45_example.java:83) at weblogic.servlet.jsp.JspBase.service(JspBase.java:27) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java :124) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java :142) at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImp l.java:744) at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImp l.java:692) at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContext Manager.java:251) at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:363) at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:263) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
Re: Mildly complex bean:message situation
Erik Horstkotte wrote:
[snip]
The problem, of course, is that
bean:message key="foo" arg="uri"
won't work, because I can't use form:rewrite for the uri arg.
Any ideas?
How about something like this:
bean:message key="foo"
arg0='%= response.encodeURL("url") %'/
Craig
Re: Example App - A Walking Tour
Wong Kok Wai wrote: Thanks! I was hoping for Struts 1.0 FCS for Christmas I was too :-(. But this week should go a long ways towards getting to a 1.0 release. but this also make my day. Yep. Thanks Ted! Craig
Weblogic 510 struts
Can anyone help shed some light on this error? I have been aggrivated with this error all morning and havent the faintest clue ... Oh - and this is being deployed to Weblogic 510 sp6. Wed Dec 27 13:17:55 EST 2000:E WebAppServletContext-prototype Root cause of ServletException javax.servlet.ServletException: runtime failure in custom tag 'message' at jsp_servlet._index._jspService(_index.java:105) at weblogic.servlet.jsp.JspBase.service(JspBase.java:27) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl. java:123) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl. java:141) at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContex tImpl.java:761) at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContex tImpl.java:708) at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletCon textManager.java:252) at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:3 46) at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:246) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:135) Wed Dec 27 13:17:55 EST 2000:I ServletContext-General servletimages: init Any help is greatly apprecitated. Thanks! BTW - Has anyone been able to run a Struts web app on Weblogic ONLY? Sharon Curlee Software Engineer elogex, inc. 212 S. Tryon St. Ste 303 Charlotte NC, 28281 (704) 227-1928
Is there a good documentation for all the xml config files parameters/settings that can be used?
Hi, What parameters can i use and is recognized by struts in the WEB.XML file? And the struts-config.xml? (i know i can look into the dtd but is there also a doc/html that explains everything?) johan
Re: Weblogic 510 struts
Hi Sharon, Can anyone help shed some light on this error? I have been aggrivated with this error all morning and havent the faintest clue ... Oh - and this is being deployed to Weblogic 510 sp6. I guess your want to run the struts example application ... Please see the message "Re: Null Pointer Exception in Struts 0.5 example" by Alain Bienvenue. The basic problem is, that WLS 510 does not honor the "load-on-startup" attribute. This means that ActionServlet will not be properly initialized. One possible solution is to make a fake request to ActionServlet before any other processing. Regards, --Andreas
Re: Weblogic 510 struts
I guess your want to run the struts example application ... Please see the message "Re: Null Pointer Exception in Struts 0.5 example" by Alain Bienvenue. The basic problem is, that WLS 510 does not honor the "load-on-startup" attribute. This means that ActionServlet will not be properly initialized. One possible solution is to make a fake request to ActionServlet before any other processing. I've successfully worked around the problem by reconfiguring struts to "lazy initialize" itself, meaning that every servlet first runs an init method, which then checks the config and initializes it as necessary. This way the application is no longer dependant on the order in which the servlets initialize. Sure, the check adds a small amount of overhead, but it truely is negligable. -- He who pursues learning will increase every day; He who pursues The Eternal will decrease every day. He will decrease and continue to decrease, Till he comes at non-action; By non-action everything can be done. Lao-Tzu (fl. B.C. 600) Chinese Philosopher - Founder of Taoism
RE: Weblogic 510 struts
calling the .do directly worked. Grr .. just a tad bit frustrating. Thanks so much! -Original Message- From: Andreas Doerr [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 27, 2000 1:44 PM To: [EMAIL PROTECTED] Subject: Re: Weblogic 510 struts Hi Sharon, Can anyone help shed some light on this error? I have been aggrivated with this error all morning and havent the faintest clue ... Oh - and this is being deployed to Weblogic 510 sp6. I guess your want to run the struts example application ... Please see the message "Re: Null Pointer Exception in Struts 0.5 example" by Alain Bienvenue. The basic problem is, that WLS 510 does not honor the "load-on-startup" attribute. This means that ActionServlet will not be properly initialized. One possible solution is to make a fake request to ActionServlet before any other processing. Regards, --Andreas
Re: Weblogic 510 struts
Hi Doug, I've successfully worked around the problem by reconfiguring struts to "lazy initialize" itself, meaning that every servlet first runs an init method, which then checks the config and initializes it as necessary. could you please explain this in a little more detail? The problem with the struts example application is, that 'index.jsp' is configured to be the welcome file of the web app. This means it is kind of an 'index.html' for the web app. At the beginning of 'index.jsp' a message tag is used. Message tag relies on the initialization work done by ActionServlet. However at this point in time no servlet has been called at all. So I don't see how "lazy initialize" done by an init method should help in this case. Regards, --Andreas
Re: Example App - A Walking Tour
My pleasure! (Though, to be honest, I had to turn my clock back to make my Christmas deadline!) *** REPLY SEPARATOR *** On 12/27/2000 at 9:54 AM Craig R. McClanahan wrote: Wong Kok Wai wrote: Thanks! I was hoping for Struts 1.0 FCS for Christmas I was too :-(. But this week should go a long ways towards getting to a 1.0release. but this also make my day. Yep. Thanks Ted!
Re: Proposal: RetroFit Struts with the Delegation Event Model
"Craig R. McClanahan" wrote:
* As fleshed out, the only events reported with this model so far
are before and after an Action's perform() method is called.
The abstract talks about building listeners for all "interesting"
events. If we're going to do a listeners model, I think we should
extend it to basically all of the processXxx methods, not just
processPerform().
Yes.
* If we go with generalized events, putting the firing logic inside
Action seems wrong -- general purpose support classes, or
public methods inside ActionServlet, seem more appropriate.
Agreed. I vote for a support class.
* Given that there will be many more events, we've got some
representation choices:
* Single ActionEvent class, or subclasses for various types
of events that have different properties (some events care
about the current ActionMapping and some don't).
I envision an event hierarchy.
* SIngle registrations of ActionListeners that receive all types of
events, or separate registrations for separate event families?
The latter would be more type-safe, and is probably preferred.
* I also have a couple of nit-picky type thoughts:
* Event type codes inside the ActionEvent seem redundant,
given that the type is implicitly defined by which listener
method you call.
True, but that assumes that the handler will never pass the event
to other methods that need to distinguish the event type -- the
information's not available to those methods.
* An ActionEvent, or the ActionListener that receives it,
should have knowledge of the ActionServlet
it is associated with, to provide access to underlying resources
provided by the servlet. (The whole event listener model is
intimately tied to Struts anyway, so this does not seem onerous).
Agreed.
* We need to use collection classes (with an implementation I'm
currently working on) that do not require lots of synchronization locks
or new object creations when processing event notifications, since
they happen on every request.
Ok.
david
Thoughts?
Craig
David Geary wrote:
ABSTRACT
It's often convenient, and sometimes necessary, to handle Struts events,
such as when an action has its locale set, or when the action servlet
processes an action's form. This document proposes retrofitting Struts
with the delegation event model. That model, which is used by the AWT
and
Swing, makes event handling simple, flexible, and scalable.
CREDITS
Delegation and Event Model for Struts? -- posted to struts-dev by
Robert Leland
INTRODUCTION
Currently, you can use inheritance to handle Struts events like those
described above. Typically, that means extending ActionServlet and
overriding a protected method, such as
ActionServlet.processActionPerform.
Inheritance-based event handling is inflexible and does not scale well
because event sources and listeners are tightly coupled at compile time.
This was evident to AWT engineers, who replaced the AWT's original
inheritance-based event model with the delegation event model.
The delegation event model, which has its roots in java.util, implements
the Observer design pattern to loosely couple event sources and event
listeners at runtime. That loose coupling makes it easy to associate
disparate types of objects, so that event listeners can easily react to
changes in event sources.
STRUTS AND THE DELEGATION EVENT MODEL
So what does it mean to retrofit Struts with the delegation event model?
It means that Struts will fire events when it performs certain
functions. You can register with Struts as an event listener, and
handle events as you see fit.
This proposal advocates firing events for all interesting Struts
functions; for example, the action servlet should fire a robust set of
events for processing actions and forms, performing mappings, etc.
Implementing support for those events follows the same
design pattern discussed in this proposal for implementing action
events.
This proposal illustrates how to modify Struts to fire events just
before, and immediately after, a Struts action has its perform method
invoked. Those events are hereafter known as action events.
IMPLEMENTING ACTION EVENTS AND ACTION LISTENERS
Getting Struts to fire action events is easy. First, we define a
listener interface and an event class:
org/struts/apache/event/action/ActionListener.java
org/struts/apache/event/action/ActionEvent.java
Here's the listing for ActionListener:
public interface ActionListener {
public void beforeActionPerform(ActionEvent event)
throws ServletException;
public void afterActionPerform(ActionEvent event)
throws ServletException;
}
ActionListener methods are
RE: Weblogic 510 struts
calling the .do directly worked. Grr .. just a tad bit frustrating. What did you do exactly? This sounds like a nice and really simple work around. -- He who pursues learning will increase every day; He who pursues The Eternal will decrease every day. He will decrease and continue to decrease, Till he comes at non-action; By non-action everything can be done. Lao-Tzu (fl. B.C. 600) Chinese Philosopher - Founder of Taoism
Re: Proposal: RetroFit Struts with the Delegation Event Model
On 12/26/2000 at 6:57 PM Craig R. McClanahan wrote: An ActionEvent, or the ActionListener that receives it, should have knowledge of the ActionServlet it is associated with, to provide access to underlying resources provided by the servlet. (The whole event listener model is intimately tied to Struts anyway, so this does not seem onerous). I'm not sure of all the implications of this suggestion, but fools rush in ... As David mentioned in a followup, the Barracuda/Enhydra gang is working on an event framework, with the premise that they can then hook it up to a presentation framework, including Struts and their own. So, I wonder if the event framework could be another component, that could be used with or without Struts -- like the custom tag library. The event framework might link up to the ActionServlet, like a datasource. If a listener had something to say to Struts, it could post it in the form of a HTTP Request to the event queue. Struts would fire it's own events into the queue (if installed), and listen for HTTP Requests posted by others. -- Ted Husted, Husted dot Com, Fairport NY USA. -- Custom Software ~ Technical Services. -- Tel 716 425-0252; Fax 716 223-2506. -- http://www.husted.com/
Re: Can't Connect to PostgreSQL with struts-example on Orion App Server
On 12/27/2000 at 2:31 PM Ted Husted wrote: http://husted.com/struts/about/ Ooops, should be http://husted.com/about/struts/
RE: Weblogic 510 struts
That looks more like a classpath problem. Is the struts jar in listed in the weblogic servlet classpath, weblogic.httpd.servlet.classpath (in weblogic.properties)? On Wed, 27 Dec 2000, Sharon Curlee wrote: well, I spoke too soon. All I did was called action.do directly. It did well in bringing up the index.jsp, but when I try and called another .do, it blew up. I am back to this error. (and I called a .do in the URL before running it) Wed Dec 27 14:46:43 EST 2000:I WebAppServletContext-prototype action: Processing a GET for /addLoad Wed Dec 27 14:46:43 EST 2000:E WebAppServletContext-prototype Servlet failed with Exception java.lang.NoClassDefFoundError: org/apache/struts/util/PropertyUtils at com.elogex.web.taglib.logic.NullPropertyCheck.doStartTag(NullPropertyChe ck.java:103) -Original Message- From: Doug Bateman [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 27, 2000 2:45 PM To: [EMAIL PROTECTED] Subject: RE: Weblogic 510 struts calling the .do directly worked. Grr .. just a tad bit frustrating. What did you do exactly? This sounds like a nice and really simple work around. -- He who pursues learning will increase every day; He who pursues The Eternal will decrease every day. He will decrease and continue to decrease, Till he comes at non-action; By non-action everything can be done. Lao-Tzu (fl. B.C. 600) Chinese Philosopher - Founder of Taoism
RE: Weblogic 510 struts
no, but it I put it explicitly in the startWeblogic.cmd file. I will modify the .properties file and try again. (Should it matter?) -Original Message- From: Doug Bateman [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 27, 2000 3:00 PM To: [EMAIL PROTECTED] Subject: RE: Weblogic 510 struts That looks more like a classpath problem. Is the struts jar in listed in the weblogic servlet classpath, weblogic.httpd.servlet.classpath (in weblogic.properties)? On Wed, 27 Dec 2000, Sharon Curlee wrote: well, I spoke too soon. All I did was called action.do directly. It did well in bringing up the index.jsp, but when I try and called another .do, it blew up. I am back to this error. (and I called a .do in the URL before running it) Wed Dec 27 14:46:43 EST 2000:I WebAppServletContext-prototype action: Processing a GET for /addLoad Wed Dec 27 14:46:43 EST 2000:E WebAppServletContext-prototype Servlet failed with Exception java.lang.NoClassDefFoundError: org/apache/struts/util/PropertyUtils at com.elogex.web.taglib.logic.NullPropertyCheck.doStartTag(NullPropertyChe ck.java:103) -Original Message- From: Doug Bateman [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 27, 2000 2:45 PM To: [EMAIL PROTECTED] Subject: RE: Weblogic 510 struts calling the .do directly worked. Grr .. just a tad bit frustrating. What did you do exactly? This sounds like a nice and really simple work around. -- He who pursues learning will increase every day; He who pursues The Eternal will decrease every day. He will decrease and continue to decrease, Till he comes at non-action; By non-action everything can be done. Lao-Tzu (fl. B.C. 600) Chinese Philosopher - Founder of Taoism
PropertyUtils handling multiple getter methods
I had a question about this part of
PropertyUtils.java.
public static PropertyDescriptor getPropertyDescriptor(Object
bean,
String name)
snipped
PropertyDescriptor descriptors[] =
getPropertyDescriptors(bean); if (descriptors ==
null) return
(null); for (int i = 0; i descriptors.length;
i++) { if
(name.equals(descriptors[i].getName()))
return
(descriptors[i]); }
The method getPropertyDescriptor
calls
getPropertyDescriptors(bean)
and iterates through them to get a match on the
name.
Incase the Bean class contains
ArrayList items;
It requires to have 2 getItems methods
1) ArrayList getItems() - to be used when
you use the
logic:iterate name="Beanname" property="items"
2) It also requires an indexed getter
Item getItem(int
index)
to handle the form input fields within the
iterate tag.
If you find the wrong descriptor first, you get a
NoSuchMethodException
I proposegetPropertyDescriptor take another parameter
(which says whether its an Indexed
property we are looking for) or create another
getIndexedPropertyDescriptor.
I'll probably do that to handle nested, indexed properties to
get logic:iterate to work...
-Chandan.
Example app - ApplicationResources.properties not found?
ok, I'm getting warmer... I deployed the .war that came with the struts0.5 release. The ApplicationResources.properties file is in the .war file, in the same path as the example files. Where did I go wrong. btw: is there a better way to go through the archives besides the list-server commands? I requested some threads, but they came to me attached in a way that my mailreader (outlook) could not understand? thanks here's my stack trace: Wed Dec 27 12:08:17 PST 2000:E WebAppServletContext-struts-example action: Cannot load application resources bundle org.apache.struts.example.ApplicationResources java.util.MissingResourceException: Can't find bundle for base name org.apache.struts.example.ApplicationResource s, locale en_US at java.util.ResourceBundle.throwMissingResourceException(Unknown Source) at java.util.ResourceBundle.getBundleImpl(Unknown Source) at java.util.ResourceBundle.getBundle(Unknown Source) at org.apache.struts.util.MessageResources.init(MessageResources.java:102) at org.apache.struts.util.MessageResources.getMessageResources(MessageResources .java:579) at org.apache.struts.action.ActionServlet.initApplication(ActionServlet.java:49 4) at org.apache.struts.action.ActionServlet.init(ActionServlet.java:289) at javax.servlet.GenericServlet.init(GenericServlet.java:258) at weblogic.servlet.internal.ServletStubImpl.createServlet(ServletStubImpl.java :457) at weblogic.servlet.internal.ServletStubImpl.createInstances(ServletStubImpl.ja va:415) at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.jav a:404) at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.jav a:325) at weblogic.servlet.internal.ServletContextImpl.preloadServlet(ServletContextIm pl.java:736) at weblogic.servlet.internal.ServletContextImpl.preloadServlets(ServletContextI mpl.java:710) at weblogic.t3.srvr.HttpServer.initServletContexts(HttpServer.java:607) at weblogic.t3.srvr.HttpServer.start(HttpServer.java:418) at weblogic.t3.srvr.T3Srvr.start(T3Srvr.java:1312) at weblogic.t3.srvr.T3Srvr.main(T3Srvr.java:827) at java.lang.reflect.Method.invoke(Native Method) at weblogic.Server.startServerDynamically(Server.java:99) at weblogic.Server.main(Server.java:65) at weblogic.Server.main(Server.java:55)
RE: Example app - ApplicationResources.properties not found?
Never mind, I got this. I assumed the .war deployment would put this in my classpath for the ActionServlet but no dice. I made sure it was in the classpath and now I'm good to go. -Original Message- From: HT Levine To: '[EMAIL PROTECTED]' Sent: 12/27/2000 12:17 PM Subject: Example app - ApplicationResources.properties not found? ok, I'm getting warmer... I deployed the .war that came with the struts0.5 release. The ApplicationResources.properties file is in the .war file, in the same path as the example files. Where did I go wrong. btw: is there a better way to go through the archives besides the list-server commands? I requested some threads, but they came to me attached in a way that my mailreader (outlook) could not understand? thanks here's my stack trace: Wed Dec 27 12:08:17 PST 2000:E WebAppServletContext-struts-example action: Cannot load application resources bundle org.apache.struts.example.ApplicationResources java.util.MissingResourceException: Can't find bundle for base name org.apache.struts.example.ApplicationResource s, locale en_US at java.util.ResourceBundle.throwMissingResourceException(Unknown Source) at java.util.ResourceBundle.getBundleImpl(Unknown Source) at java.util.ResourceBundle.getBundle(Unknown Source) at org.apache.struts.util.MessageResources.init(MessageResources.java:102 ) at org.apache.struts.util.MessageResources.getMessageResources(MessageResou rces .java:579) at org.apache.struts.action.ActionServlet.initApplication(ActionServlet.jav a:49 4) at org.apache.struts.action.ActionServlet.init(ActionServlet.java:289) at javax.servlet.GenericServlet.init(GenericServlet.java:258) at weblogic.servlet.internal.ServletStubImpl.createServlet(ServletStubImpl. java :457) at weblogic.servlet.internal.ServletStubImpl.createInstances(ServletStubImp l.ja va:415) at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl .jav a:404) at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl .jav a:325) at weblogic.servlet.internal.ServletContextImpl.preloadServlet(ServletConte xtIm pl.java:736) at weblogic.servlet.internal.ServletContextImpl.preloadServlets(ServletCont extI mpl.java:710) at weblogic.t3.srvr.HttpServer.initServletContexts(HttpServer.java:607) at weblogic.t3.srvr.HttpServer.start(HttpServer.java:418) at weblogic.t3.srvr.T3Srvr.start(T3Srvr.java:1312) at weblogic.t3.srvr.T3Srvr.main(T3Srvr.java:827) at java.lang.reflect.Method.invoke(Native Method) at weblogic.Server.startServerDynamically(Server.java:99) at weblogic.Server.main(Server.java:65) at weblogic.Server.main(Server.java:55)
My fix for Weblogic5.1 and struts example
Having suffered through this problem this morning, here is what I added to my weblogic.properties file to successfully get the ActionServlet to initialize at the startup of Weblogic. this works like a charm and is way better than rewriting code? and browsing to a .do? Thanks for the help everyone gave me. = paste below into weblogic.properties === #setup struts control weblogic.httpd.register.ActionServlet=org.apache.struts.action.ActionServlet weblogic.system.startupClass.StartMyServlet=weblogic.servlet.utils.ServletSt artup weblogic.system.startupArgs.StartMyServlet=servlet=ActionServlet
Struts design question
Hi, I'm going through Struts code trying to understand how this whole thing works. I could figure out almost everything except one thing: Why do Action, ActionForm and ActionMappings classes keep references to the ActionServlet? Can anybody explain this? Thanks Alex
Re: Struts design question
Why do Action, ActionForm and ActionMappings classes keep references to the ActionServlet? So that they can access the many features available through the servlet, like logging and (lately) a JBDC DataSource. The ActionServlet is like a switchboard, and the references a way they can dial "0" for the operator. For more about how Struts works, there is a "Walking Tour of the Example Application" at http://husted.com/about/struts/ along with a sample JBDC applicaton. *** REPLY SEPARATOR *** On 12/27/2000 at 6:41 PM Punyansky, Alex wrote: Hi, I'm going through Struts code trying to understand how this whole thing works. I could figure out almost everything except one thing: Why do Action, ActionForm and ActionMappings classes keep references to the ActionServlet? Can anybody explain this? Thanks Alex
Re: Weblogic 510 struts
WLS 5.1 SP8 has fixed the load-on-startup problem. The Struts example works fine except for the ApplicationResources.properties file is not unjar from the WAR and will cause a null pointer exception when the bean:message is encountered. My workaround is to add ApplicationResources.properties manually to the correct path under the _tmp_war directory that WLS has created and the Struts example works fine after this. --- Andreas Doerr [EMAIL PROTECTED] wrote: Hi Sharon, Please see the message "Re: Null Pointer Exception in Struts 0.5 example" by Alain Bienvenue. The basic problem is, that WLS 510 does not honor the "load-on-startup" attribute. This means that ActionServlet will not be properly initialized. __ Do You Yahoo!? Yahoo! Photos - Share your holiday photos online! http://photos.yahoo.com/
Re: Missing resources attribute org.apache.struts.action.MESSAGE
In trying to set-up Struts on a hosted machine running Apache and Tomcat, I ran into javax.servlet.ServletException: Missing resources attribute org.apache.struts.action.MESSAGE The configuration works fine under my standalone Apache. Besides what is in the install file, do I need to do anything else under Apache for it to find the message resource. -- Ted Husted, Husted dot Com, Fairport NY USA. -- Custom Software ~ Technical Services. -- Tel 716 425-0252; Fax 716 223-2506. -- http://www.husted.com/
