EL in jtls tag attributes?

I keep getting an exception when I try to use an expression in a jstl tag attribute and I don't understand why. I'm new to jstl, but everywhere I look online people are using these expressions just like I'm trying to. In fact, if I'm not mistaken, this is what the expression language was originally developed for, so I'm extra confused.
an example:
<c:forEach items="${someClass.someCollection}" var="myItem">
blah blah blah
</c:forEach>throws this exception:
According to TLD or attribute directive in tag file, attribute items does not accept any expressionsthis happens when I run it with taglib uri set to http://java.sun.com/jstl/core but if I point it at a local .tld I get no exception. It appears that the tld at java.sun.com/jstl/core has a validator that disallows expressions in tag attributes, but I don't understand why. Will I always need to supply my own .tld files?
any clarification of whats going on would help scrape off some of my shiny newbieness, and thus would be greatly appreciated.
thanks

what webserver are you running? And what version of JSTL are you using?
You should go for a webserver that has JSP 2.0 support (Tomcat 5.5 for example) and you should use at least JSTL 1.1. You can download the latest version (1.2) here:
http://people.apache.org/builds/jakarta-taglibs/nightly/projects/standard/
Also be sure that in your web.xml file the servlet version is set to 2.4. It will look something like this:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
</web-app>Your best bet is to install an IDE like Netbeans and let it create a web project for you, then all the basic setup steps are performed for you and you have the correct library versions.

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Hi,
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Hi,
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Unable to Deploy WAR file (Unknown assembly root-tag attribute: version)

Hello,
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Thanks for the reply sasesha,
I've changed my web.xml to
<?xml version = '1.0' encoding = 'windows-1252'?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
     "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
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During the initial upload the previous error doesn't show anymore, however, I'm getting this new error and currently I'm a bit at a loss since i included the spring.jar library file in my war file. I tried the new war file in Tomcat and the war file deploys fine. Am I missing a configuration or setup ?
Failed to deploy web application "mytest". Nested exception Root Cause: Class not found: org.springframework.beans.factory.BeanDefinitionStoreException; nested exception is: java.lang.ClassNotFoundException: org.springframework.beans.factory.BeanDefinitionStoreException. Class not found: org.springframework.beans.factory.BeanDefinitionStoreException; nested exception is: java.lang.ClassNotFoundException: org.springframework.beans.factory.BeanDefinitionStoreException
Thanks again,
sethsera

How to tag attribute member with standard dimension member in EIS

hi,
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THANK U IN ADVANCE

In your OLAP model, view columns for the base dimension table. Go into the column properties and for the columns that have Attribute values highlight them and click the Attribute button.
Go into Metadata Model and those fields will be available to drag into your outline as attribute members.
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JSP ${} expressions in JSF tag attributes

Does anyone know why the expert group decided not to allow ${} style expressions within JSF tag attributes? I understand that a different syntax is needed to implement the 'late binding' #{} expressions used to link input controls to form beans, but not why the JSF tags actually prevent the use of immediately evaluated ${} expressions for accessing variables in the page scope in JSP 2.0.
I know there has been a lot of discussion about this and other threads mention a security loophole that would be opened up by allowing expressions like #{blah.${someProperty}}, but I'm not sure why this sort of thing would cause a problem. Is there any way to enable this behaviour, such as editing the JSF tag library descriptors to allow runtime expressions (horrible though that sounds)? Or perhaps another JSF implementation that supports both immediately evaluated and late-binding expressions? It seems a rather unnecessary restriction that is going to cause much confusion and mistyping for all...
Thanks in advance,
Keith.

Thanks Adam, I see the problem now. It's a fairly obscure loophole but serious nonetheless. Of course, this problem could also be avoided by not using request parameters within JSF tags as it doesn't affect the majority of legitimate uses for expressions.
I have to disagree with you about mixing ${} and #{} expressions though. The majority of developers will be used to writing ${} expressions in JSTL and JSP text and so will expect them to do work the same in JSF tags. Judging by the number of posts in this forum about being unable to use page scope variables in JSF tags this issue is already confusing a lot of people.
As a rule of thumb, "use ${} for expressions that are output to the page and #{} for binding controls to backing beans and invoking methods" (which perform clearly distinct functions) is a lot simpler and easier to learn IMHO than the current one, which is "use ${} for expressions that are output to the page except within a JSF tag, where you use #{} for the same thing and also to update form values and invoke action methods"! (OK, I'm exaggerating a little for effect, but you get the point... :-)
I agree that mixing both types of expression in the same attribute might be a little confusing, but this is an unlikely edge case that should probably be prevented in value binding or action attributes anyway. It's more of an issue for label values where mistyping one for the other is already very common and, although not especially difficult to debug, is just another pitfall awaiting the unwary JSP developer. I'm not sure that JSP expressions would be much more difficult to debug anyway as the value and method bindings will simply not work, which is pretty obvious as soon as you try and test the thing.
Is this something that the EG would be prepared to reconsider for the next release of JSF, or perhaps getting the security loophole addressed in the next JSP spec? In the meantime, is there any reason that developers shouldn't enable runtime expressions in the TLD file provided that they're willing to live with the consequences?
(Sorry to harp on about it, but I've already had several complaints about this after recommending JavaServer Faces for a major development project at ingenta.com.)
Many thanks,
Keith.

Extract function not working with tag attributes

Hi all,
I have an xml document stored in the db as an xmlType. I am trying to use the extract function to retrieve values. The extract will work fine on tags without attributes. Any tags with attributes or tags beyond the tags with attributes will not be accessible.
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<tag3 att="hello">bye</tag3>
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</tag1>
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here is my select statement
works
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does not work
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from test_xml e;
Any ideas?

Hi all,
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The tag attribute that I was not handling was xmlns="".
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Cheers

Custom tag attribute calculated by scriptlet expression

Hi,
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I had the same problem in a design a couple of months ago and could not get around it so I switched the functionality into code and out of the tag lib.
I take it you are trying to do something like this?
<%
String value="hiworld";
%>
<mytaglib:saysomething value="<%=value%>"/>

Custom tag attribute question

How to assign value of expression or variable to custom tag attribute in jsp?

I had the same problem in a design a couple of months ago and could not get around it so I switched the functionality into code and out of the tag lib.
I take it you are trying to do something like this?
<%
String value="hiworld";
%>
<mytaglib:saysomething value="<%=value%>"/>

Using TAG Attributes within JSF Tags

I'm using some .tag files for templating purposes. I'm using two tag attributes via <@% attribute %> directive. How can i access this attribute to do something like follows.
<%@ tag display-name="Area de Trabajo" language="java" %>
<%@ taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@ taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<%@ taglib prefix="t" uri="http://myfaces.apache.org/tomahawk"%>
<%@ attribute name="title" required="true"%>
<%@ attribute name="location" %>
<t:div styleClass="zonaArea#{(not empty location) ? location : 'Global'}">
<h:panelGrid columns="1">
<h:outputText value="#{title}" />
</h:panelGrid>
<jsp:doBody />
</t:div>

Hola Alberto.
Any luck? Did you worked that around?
I'm just trying to do the same thing...
Tried to do something like:
<%@attribute name="enabled" type="java.lang.String" %>
<h:outputText value="test: #{requestScope['enabled']}" style="font-weight: bold;" /> to no avail...
Let me know, please!
Hi,
Manrico

Updating tag attributes in design time

I have a design time renderer for my custom component... As the component renders itself in design time, I set some of the component properties from within the renderer... The property sheet correctly shows those values... However, the associated JSP tag in the source view does not show those attributes... The JSP tag attributes dictate the runtime behavior and since they are not set properly, my component misbehaves.
How do I make sure that the tag attributes sync up with the property sheet values?
Also, what is the motivation behind the property sheet displaying the component values and not the JSP tag values? Having it the way it is right now opens itself up to a bunch of out-of-sync problems like the one I encountered.
Thanks,
Keyur

Ok - here are a couple of scenarios:
1. I have a component, say chart component associated with a connection component like this:
<my:connection id="connection1" />
<my:chart connectionId="connection1" />The user first drags and drops the connection component. The ID connection1 is automatically associated to it. Next he drops the chart component. Now, I would like to automatically populate the connectionId attribute without the user having to type it in manually. I am able to do that (in design time) in the renderer of the chart component - I programmatically look for a connection component on the page and set the connectionId attribute of the control. And when I do that it correctly shows the connectionId attribute populated in the property sheet but the corresponding tag attribute is not.
Sure enough, at runtime, it is the tag attribute values that count and since those are not updated by the IDE, it does not work as expected.
2. Creator updates the style attribute when I move or resize the component. Now, I also have position attributes left and top defined on my component and I use these attributes at runtime to position my component. So, in design time I extract the left and top values from the style attribute and set them on the component. But again, the tag attributes are not populated and so the component is not positioned properly.
#1 is to convenience the user so that he doesn't have to manually enter values for attributes which can be automatically populated at design time.
In fact for #1, I would ideally like to show the user a drop down list of all the connections available to him in the property sheet and select the first one by default. Is this possible?
#2 is for backward compatibility reasons - We already have runtime renderers in place which use left and top attributes explicitly to render the components at runtime. And this is not restricted to left and top only but other client attributes as well - such as borders, backgrounds etc. which we expose as separate attributes.

JSP in custom tag attributes...

Sirs,
          A very nice feature from a development perspective, would be the ability
          to use JSP code within custom tags. Say I have a page on which I wish
          to give all the information on a widget. Say further that I have
          implemented a tag that writes out all the info of a widget as HTML
          table. I would like to write something like this:
          <mytaglib:widgetTag widgetID="<%=request.getParameter("widget_id")%>"
          />
          As far as I know, in the current implementation of custom taglibs this
          does not seem to be possible. Instead you end up writing something like
          this:
          <mytaglib:widgetTag>
          <mytaglib:getWidget><%=request.getParameter("widget_id")%>"</mytaglib:getWidget>
          <mytaglib:displayWidget />
          </mytaglib:widgetTag>
          Which is much more like a scripting language than a heirarchical XML .
          Now, I could always just use the request object within the tag helper
          classes, but this gives up flexibility and can introduce security
          issues, and it also makes the tags much more difficult to work with...
          In short, we should push for JSP evaluation of tag attributes. Weblogic
          could leap ahead of other app servers in this area (making up for the
          custom tag performance issues, to be solve in sp6) and Sun would, once
          again, follow Weblogic's lead and rewrite the standard to include this
          functionality.
          Regards,
          Carson Gross


Carson,
          Perhaps the problem is that you are treating custom tags like one would
          construct an imperative language. I have never had to put Java or use beans
          or %= or even parameters to tags into a JSP because of custom tags.
          The real problem is writing/packaging/maintaining all those tags; sure could
          use a tool that did just that ;-)
          Peace,
          Cameron Purdy
          [email protected]
          http://www.tangosol.com
          WebLogic Consulting Available
          "Carson Gross" <[email protected]> wrote in message
          news:[email protected]...
          > Sirs,
          >
          > A very nice feature from a development perspective, would be the ability
          > to use JSP code within custom tags. Say I have a page on which I wish
          > to give all the information on a widget. Say further that I have
          > implemented a tag that writes out all the info of a widget as HTML
          > table. I would like to write something like this:
          >
          > <mytaglib:widgetTag widgetID="<%=request.getParameter("widget_id")%>"
          > />
          >
          > As far as I know, in the current implementation of custom taglibs this
          > does not seem to be possible. Instead you end up writing something like
          > this:
          >
          > <mytaglib:widgetTag>
          >
          >
          <mytaglib:getWidget><%=request.getParameter("widget_id")%>"</mytaglib:getWid
          get>
          >
          > <mytaglib:displayWidget />
          > </mytaglib:widgetTag>
          >
          > Which is much more like a scripting language than a heirarchical XML .
          > Now, I could always just use the request object within the tag helper
          > classes, but this gives up flexibility and can introduce security
          > issues, and it also makes the tags much more difficult to work with...
          >
          > In short, we should push for JSP evaluation of tag attributes. Weblogic
          > could leap ahead of other app servers in this area (making up for the
          > custom tag performance issues, to be solve in sp6) and Sun would, once
          > again, follow Weblogic's lead and rewrite the standard to include this
          > functionality.
          >
          > Regards,
          > Carson Gross
          >

Repeating Regions and Editable Tag Attributes?

I want to produce a template that will let users create pages
that list items as a thumbnail image and a short text description,
one after the other.
I can set this up as a repeating region, but I would also
like to make only certain attributes of the image editable (src and
alt for example). However, when I use editable tag attributes to do
this, the image in each repeated region ends up with the same
attribute values - when I add a new repeat region and then change
the src tag through the Template Properties dialog,
all of the images take on the same src value. Looking at the
code, it looks like the editable instances in each repeated region
get the same name, and so I can see that DW will get confused.
Is this a limitation in DW? Is there a work around anyone can
suggest?
TIA

So, you have some number of people who are editing the child
pages and you
want to constrain their editing choices? Are you using
Contribute?
Anyhow, I am not aware of any convenient way you can do
something like this
using DW's Template features.
Murray --- ICQ 71997575
Adobe Community Expert
(If you *MUST* email me, don't LAUGH when you do so!)
==================
http://www.projectseven.com/go
- DW FAQs, Tutorials & Resources
http://www.dwfaq.com - DW FAQs,
Tutorials & Resources
==================
"manicbananic" <[email protected]> wrote in
message
news:g7pimq$fvg$[email protected]..
>I want to produce a template that will let users create
pages that list
>items
> as a thumbnail image and a short text description, one
after the other.
>
> I can set this up as a repeating region, but I would
also like to make
> only
> certain attributes of the image editable (src and alt
for example).
> However,
> when I use editable tag attributes to do this, the image
in each repeated
> region ends up with the same attribute values - when I
add a new repeat
> region
> and then change the src tag through the Template
Properties dialog,
>
all
> of the images take on the same src value. Looking at the
code, it looks
> like
> the editable instances in each repeated region get the
same name, and so I
> can
> see that DW will get confused.
>
> Is this a limitation in DW? Is there a work around
anyone can suggest?
>
> TIA
>

Struts2 and Tiles2 - Error executing tag: Attribute 'title' not found.

I keep getting Error executing tag: Attribute 'title' not found when I go to the baseLayout.jsp page. I am figuring it is not seeing the tiles.xml file, but I have placed it in the /WEB-INF directory like every web page I have found says too. Any help or pointers would be appreciated.
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
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     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:401)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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          <artifactId>struts2-core</artifactId>
          <version>2.2.1</version>
     </dependency>
     <dependency>
          <groupId>org.apache.struts</groupId>
          <artifactId>struts2-tiles-plugin</artifactId>
          <version>2.2.1</version>
     </dependency>
        <dependency>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
          <version>1.2.16</version>
     </dependency>
        <dependency>
          <groupId>jboss</groupId>
          <artifactId>javassist</artifactId>
          <version>3.1</version>
     </dependency>Struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
     <constant name="struts.enable.DynamicMethodInvocation"
          value="false" />
     <constant name="struts.devMode" value="false" />
     <constant name="struts.custom.i18n.resources"
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     <package name="default" namespace="/" extends="struts-default">
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          <action name="login" class="net.game_tech.LoginAction">
               <result name="success" type="tiles">/login.success.tiles</result>
               <result name="error" type="tiles">/login.tiles</result>
          </action>
          <action name="login-form">
               <result name="success" type="tiles">/login.tiles</result>
          </action>
     </package>
</struts>web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="http://java.sun.com/xml/ns/javaee"
     xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
     id="WebApp_ID" version="2.5">
     <display-name>Forum</display-name>
     <listener>
          <listener-class>
               org.apache.struts2.tiles.StrutsTilesListener
          </listener-class>
     </listener>
     <context-param>
          <param-name>tilesDefinitions</param-name>
          <param-value>/WEB-INF/tiles.xml</param-value>
     </context-param>
     <filter>
          <filter-name>struts2</filter-name>
          <filter-class>
               org.apache.struts2.dispatcher.FilterDispatcher
          </filter-class>
     </filter>
     <filter-mapping>
          <filter-name>struts2</filter-name>
          <url-pattern>/*</url-pattern>
     </filter-mapping>
     <welcome-file-list>
          <welcome-file>index.jsp</welcome-file>
     </welcome-file-list>
     <resource-ref>
          <description>Mysql Forum</description>
          <res-ref-name>jdbc/Forum</res-ref-name>
          <res-type>javax.sql.DataSource</res-type>
          <res-auth>Container</res-auth>
          <res-sharing-scope>Shareable</res-sharing-scope>
     </resource-ref>
</web-app>tiles.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE tiles-definitions PUBLIC
       "-//Apache Software Foundation//DTD Tiles Configuration 2.0//EN"
       "http://tiles.apache.org/dtds/tiles-config_2_0.dtd">
<tiles-definitions>
     <definition name="baseLayout" template="/baseLayout.jsp">
          <put-attribute name="title" value="Simple Java Forums" />
          <put-attribute name="header" value="/common/Header.jsp" />
          <put-attribute name="menu" value="/common/MenuNav.jsp" />
          <put-attribute name="body" value="" />
          <put-attribute name="footer" value="/common/Footer.jsp" />
     </definition>
     <definition name="/login.tiles" extends="baseLayout">
          <put-attribute name="header" value="/pvt/Login.jsp" />
     </definition>
     <definition name="/login.success.tiles" extends="baseLayout">
          <put-attribute name="header" value="/pvt/Welcome.jsp" />
     </definition>
</tiles-definitions>baseLayout.jsp
<%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
     <title><tiles:insertAttribute name="title" /></title>
     <link href="css/main.css" rel="stylesheet" type="text/css" media="all"/>
</head>
<body>
     <div id="page">
          <tiles:insertAttribute name="header" />
          <tiles:insertAttribute name="menu" />
          <tiles:insertAttribute name="body" />
          <tiles:insertAttribute name="footer" />
     </div>
</body>
</html>

I was playing around with it some more and was trying to follow this page:
http://www.vaannila.com/struts-2/struts-2-example/struts-2-tiles-example-1.html
I made sure I had the same jar versions. I still get the same exception in the Browser, but I get a few more log messages in the tomcat log;
Obviously I have something configured wrong. I'll see what searching brings up, and of course any help would be appreciated.
2010-08-24 10:30:59,885 DEBUG com.opensymphony.xwork2.config.ConfigurationManager.debug:57 - Checking ConfigurationProviders for reload.
2010-08-24 10:30:59,920 DEBUG com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler.debug:57 - Entering nullPropertyValue [target=[com.opensymphony.xwork2.DefaultTextProvider@4ba76eff], property=struts]
2010-08-24 10:30:59,956 WARN com.opensymphony.xwork2.ognl.OgnlValueStack.warn:45 - Could not find property [struts.actionMapping]
2010-08-24 10:30:59,957 DEBUG com.opensymphony.xwork2.config.ConfigurationManager.debug:57 - Checking ConfigurationProviders for reload.
2010-08-24 10:30:59,967 DEBUG com.opensymphony.xwork2.config.ConfigurationManager.debug:57 - Checking ConfigurationProviders for reload.
2010-08-24 10:30:59,969 DEBUG com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler.debug:57 - Entering nullPropertyValue [target=[com.opensymphony.xwork2.DefaultTextProvider@4ba76eff], property=org]
2010-08-24 10:30:59,969 WARN com.opensymphony.xwork2.ognl.OgnlValueStack.warn:45 - Could not find property [org.apache.catalina.jsp_file]
2010-08-24 10:31:00,089 DEBUG com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler.debug:57 - Entering nullPropertyValue [target=[com.opensymphony.xwork2.DefaultTextProvider@4ba76eff], property=org]
2010-08-24 10:31:00,089 WARN com.opensymphony.xwork2.ognl.OgnlValueStack.warn:45 - Could not find property [org.apache.tiles.servlet.context.ServletTilesRequestContext.CURRENT_CONTAINER_KEY]
2010-08-24 10:31:00,099 DEBUG com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler.debug:57 - Entering nullPropertyValue [target=[com.opensymphony.xwork2.DefaultTextProvider@4ba76eff], property=org]
2010-08-24 10:31:00,100 WARN com.opensymphony.xwork2.ognl.OgnlValueStack.warn:45 - Could not find property [org.apache.tiles.AttributeContext.STACK]
2010-08-24 10:31:00,100 DEBUG com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler.debug:57 - Entering nullPropertyValue [target=[com.opensymphony.xwork2.DefaultTextProvider@4ba76eff], property=org]
2010-08-24 10:31:00,100 WARN com.opensymphony.xwork2.ognl.OgnlValueStack.warn:45 - Could not find property [org.apache.tiles.AttributeContext.STACK]
Aug 24, 2010 10:31:00 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
org.apache.tiles.jsp.taglib.NoSuchAttributeException: Attribute 'title' not found.

Embedded QuickTime - Embed Tag Attributes

Is there an embed tag attribute that controls playback speed? I run a website that streams MIDI and users have a need to speed up or slow down the playback speed.

Not part of the embed tag attributes but you can launch the MIDI files via the QuickTime Player app (target="quicktimeplayer") and then the visitor can use the built in A/V Controls window to adjust playback speed and pitch.

How to get and set custom tag attributes

How do i get and set custom tag attributes from a jsp page?

Not sure if this is what your looking for, but....
example...
< taglibprefix:testtag attribute1="x" attribute2="y">
...of course, the attributes have to be defined in your taglib (.tld) file

EL in jtls tag attributes?

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