Problem using custom tag library in portlet's jsp

Hi,
I created a custom portlet (a JSR 168 portlet) and I'm using a tag library that I previously developed. Normally it works fine, but sometimes I get a ClassCastException. Once I redeploy the portlet everything works again. This is Oracle Portal 10.1.4.
Has anybody encountered similar problems?
Here's the exception:
taglib exception:
java.lang.ClassCastException at timecardreminderportlet.html._view._jspService(_view.java:201) at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:350) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:824) at com.evermind.server.http.ServletRequestDispatcher.include(ServletRequestDispatcher.java:121) at oracle.webdb.wsrp.server.RequestDispatcherImpl.include(Unknown Source) at org.mitre.isis.trs.reminder.portlet.TimecardReminderPortlet.doDispatch(TimecardReminderPortlet.java:108) at javax.portlet.GenericPortlet.render(Unknown Source) at oracle.webdb.wsrp.server.Server.getMarkup(Unknown Source) at oracle.webdb.wsrp.WSRP_v1_Markup_PortType_Tie.invoke_getMarkup(WSRP_v1_Markup_PortType_Tie.java:224) at oracle.webdb.wsrp.WSRP_v1_Markup_PortType_Tie.processingHook(WSRP_v1_Markup_PortType_Tie.java:499) at com.sun.xml.rpc.server.StreamingHandler.handle(StreamingHandler.java:230) at com.sun.xml.rpc.server.http.ea.JAXRPCServletDelegate.doPost(JAXRPCServletDelegate.java:153) at com.sun.xml.rpc.server.http.JAXRPCServlet.doPost(JAXRPCServlet.java:69) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65) at oracle.webdb.wsrp.server.ContextFilter.doFilter(Unknown Source) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:663) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330) at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:830) at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:224) at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:133) at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192) at java.lang.Thread.run(Thread.java:534)

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Hi All,
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Could anyone please let me know what is going on here?
          SundayFunday!
          [email protected] (SundayFunday) wrote in message news:<[email protected]>...
          > Can anyone help me with this?!!
          >
          > Thanks!
          >
          > Sundayfunday.
          >
          > [email protected] (SundayFunday) wrote in message news:<[email protected]>...
          > > Hi All,
          > >
          > > I am getting the following error:
          > >
          > > On the browzer page when I invoke the foo.jsp page containing a tag
          > > library.
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          > > probably occurred due to an error in /jsp/foo.jsp line 7:
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          > > Wed Mar 27 13:17:49 PST 2002
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          > >
          > >
          > > The configutation is as follows
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          > >
          > >
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Iam facing problem when i am deploying my files on j2ee 1.4 server it give following erroer::
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any body can help me;
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<<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE taglib
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thanks for reply it still giving error :
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Problem using custom tags

Hi All,
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<?xml version="1.0" encoding="ISO-8859-1" ?>
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16:
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18:
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<tagclass>FirstTag</tagclass>Package your classes first. Read this:
[http://faq.javaranch.com/java/PackageYourBeans|http://faq.javaranch.com/java/PackageYourBeans]

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Let me explain the problem again
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null

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<data-sources>
<data-source
class="oracle.jdbc.pool.OracleConnectionCacheImpl"
name="jdbc/pool/OracleCache"
location="jdbc/pool/OracleCache"
url="jdbc:oracle:thin:@oracle1:1521:pdev"
>
<property name="maxLimit" value="15" />
<property name="cacheScheme" value="2" />
<property name="user" value="console" />
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possible values.
Dynamic 1
Fixed Wait 2
Fixed Return Null 3
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</data-sources>
many thanks,
Matt.

Hi. Show me your pool definition.
Joe
Ramamurthy wrote:
I am using the jsp custom tag library from BEA called sqltags.tld which came with Weblogic 5.1. Currently I am using Weblogic6.1 sp2 on Solaris.
I have created a Connection Pool for Sybase database using the driver com.sybase.jdbc.SybDriver.
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at weblogic.taglib.sql.ConnectionTag.doAfterBody(ConnectionTag.java:43)
at jsp_servlet.__hubwcdata._jspService(__sampletest.java:1014)"
After this message, whenever I try to access the same jsp page I am getting the message
"javax.servlet.jsp.JspException: Failed to load JDBC driver: weblogic.jdbc.pool.D
river
at weblogic.taglib.sql.ConnectionTag.doStartTag(ConnectionTag.java:34)
at jsp_servlet.__hubwcdata._jspService(__sampletest.java:205)".
Can you please help me the reason why this problem is happening and how to fix this ?
This problem doexn't happen consistently. This occurs once in a while.
I tried to increase Login delay Seconds parameter in the Connection Pool to 15 sec. It didn't help me much.
Thanks for your help !!!
Ram

How to use a tag library in multiple web applications?

Morning all,
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I have developed a custom tag library and tested it out and its working great.
Now, How do I use in my other web applications? Do I need to copy the JAR file to webapps\app1\WEB-INF\lib, webapps\app2\WEB-INF\lib etc directories?
The problem with this approach is, if I happen to change the tag library code, I will have to make sure that I remember to copy the new JAR file to the above mentioned directories. Ofcourse I can write a simple ant script that would do it for me, but I was wondering if there was an efficient and yet simple way of achieving the same.
Thanks in advance,
Joe

Thanks Vidyut! You've answered my question.
I placed the jar file in the $CATALINA_HOME/shared/lib directory. But where should I place the taglib TLD file? And how should I reference it in web.xml?
Currently, my web.xml is as follows and it doesn't work.
<?xml version="1.0" encoding="ISO-8859-1"?>
<!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>
<taglib>
<taglib-uri>http://abc.com</taglib-uri>
<taglib-location>c:\Tomcat\shared\lib\mytags-taglib.tld</taglib-location>
</taglib>
</web-app>
Thanks again!
Joe

Problems with custom tags (Tomcat 4.1)

I have been trying to set up an existing web application to use a custom tag library. I have these tag-related files:
/photodb/WEB-INF/photodb.tld
/photodb/WEB-INF/classes/PhotoListTag.class
/photodb/photolist.jsp
This is how i have the photoList tag configured in photodb.tld
<tag>
<name>photoList</name>
<tag-class>PhotoListTag</tag-class>
<body-content>JSP</body-content>
<attribute>
<name>startIndex</name>
</attribute>
</tag>
When i try to view photolist.jsp, i get this error:
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: -1 in the jsp file: null
Generated servlet error:
[javac] Compiling 1 source file
C:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\photodb\photolist_jsp.java:73: cannot resolve symbol
symbol : class PhotoListTag
location: class org.apache.jsp.photolist_jsp
PhotoListTag jspxth_photodb_photoList_0 = (PhotoListTag) jspxtagPool_photodb_photoList.get(PhotoListTag.class);
^
C:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\photodb\photolist_jsp.java:73: cannot resolve symbol
symbol : class PhotoListTag
location: class org.apache.jsp.photolist_jsp
PhotoListTag jspxth_photodb_photoList_0 = (PhotoListTag) jspxtagPool_photodb_photoList.get(PhotoListTag.class);
^
C:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\photodb\photolist_jsp.java:73: cannot resolve symbol
symbol : class PhotoListTag
location: class org.apache.jsp.photolist_jsp
PhotoListTag jspxth_photodb_photoList_0 = (PhotoListTag) jspxtagPool_photodb_photoList.get(PhotoListTag.class);
^
3 errors
I have tried many ideas, such as packaging the tag handler class, and putting the class file in other loctions, but nothing has helped.
I know that Tomcat is recognizing PhotoListTag at some point (when it parses the TLD file, but not when compiling the JSP, I think), because if i change the <tag-class> to an invalid class, i get an "Unable to load class photoList" (which is a confusing error message btw, as photoList is not a class, but a tag name).
Does anyone know how to fix this problem? I've been going in circles for hours, and i'm thinking this problem has a simple solution.

Thank you for your quick replies. Unfortunately, they do not solve my problem. If I put PhotoListTag in the com.yourdomain package (and move it to classes/com/yourdomain), the error changes to reflect the different package (e.g. package com.yourdomain does not exist). Also, deleting the class files and restarting Tomcat did not cause any changes.
Although my knowledge of how Tomcat works is limited, it seems to me that something like this is happening:
When a request for /photodb/photolist.jsp is recieved, tomcat processes that file, processes the tld file, and checks for that any classes called using a tag--in this case <photodb:photoList>--exist. If the class is invalid, the error message "Unable to load class photoList" is given.
Otherwise, it translates the jsp into java, and attempts to compile it. This is where the problem occurs. It seems that the jasper compiler does not know where to look for the PhotoListTag class. Is there a way that this can be changed, or is could the problem be caused by something else?

Custom tag library called multiple times

Hi ppl ,
I have a custom tag library which i use to populate some menu components. When i do call my custom tag library though , it is called multiple times, use case is as follows.
I have menu tabs and menu bars which thanks to Mr.Brenden is working splendidly as so:-
<af:menuTabs>
<af:forEach var="menuTab" items="#{bindings.menu.vwUserMenuTabRenderer.rangeSet}">
<af:commandMenuItem text="#{menuTab.MenuLabel}"
shortDesc="#{menuTab.MenuHint}"
rendered="true"
immediate="true"
selected="#{sessionScope.selectedMenuId == menuTab.MenuId }"
onclick="fnSetSelectedValue('#{menuTab.MenuId}')" >
</af:commandMenuItem>
</af:forEach>
</af:menuTabs>
<af:menuBar>
<af:forEach var="menuBar" items="#{bindings.menu.vwUserMenuBarRenderer.rangeSet}">
<af:commandMenuItem onclick="return clickreturnvalue()"
onmouseover="dropdownmenu(this, event,#{menuBar.MenuId}, '150px')"
onmouseout="delayhidemenu()"
text="#{menuBar.MenuLabel}"
action="#{menuBar.MenuUri}"
rendered="#{menuBar.ParentId == sessionScope.selectedMenuId}"
immediate="true" />
</af:forEach>
</af:menuBar>
</afc:cache>
now all of this code is within a subview , and just directly below the subview tag , i have the call to my custom tag library:-
<myCustomTagLib:menuCascade />
only issue now is that assuming i have in all 7 menu bar components, the doStartTag is called 7 times. the relevant code within my custom tag class is as follows :-
public int doStartTag() throws JspException {
return (EVAL_BODY_INCLUDE);
public int doEndTag() throws JspException {
try {
declareVariables();
return EVAL_PAGE;
}catch (Exception ioe) {
throw new JspException(ioe.getMessage());
and within my declareVariables method i do an out of the jscript ( out.print(jscript.toString()); ) which is a simple string generated based on certain conditions...
now it seems to be working fine on the front end , but when i view the source of the page, i notice that the declaration is called multiple times, and this happens because the doStartTag method is called multiple times, i haven't even nested the call to the custom tag within the menu components , any clue as to whats going wrong ?
Cheers
K

Hi,
if you add the following print statement
System.out.println("rendering "+FacesContext.getCurrentInstance().getViewRoot().getViewId());
Then the output in my case is
07/04/24 08:14:04 rendering /BrowsePage.jsp
07/04/24 08:14:05 rendering /otn_logo_small.gif
The image comes from the file system, which means it is rendered by the JSF lifecycle. If you reference the image with a URL then the lifecycle doesn't render the image but only refrences it.
To avoid your prepare render code to be executed multiple times, just check for jsp and jspx file extensions, which will guarantee that your code only executes for JSF pages, not for loaded files.
The reason why this happens is because the JSF filter is set to /faces , which means all files that are loaded through that path
Frank

Jsp:include problem in custom tag

I call <jsp:include page="emailbody.jsp" /> within a custom tag(in a file
          caller.jsp), which does emailing.
          When I invoke caller.jsp from browser, I do get the output(body of the
          email) on the browser screen, but not the output is not send as the body of
          the email.
          When I use static include namely, <@include file="emailbody.jsp" />, the
          output is directed to the body of the email.
          The above means, for a static jsp include file, it is parsed and included in
          the body-evaluation of the custom tag.
          For a dynamic include file, it is NOT parsed and NOT included in the
          body-evaluation of the custome tag.
          The reason could be, How Weblogic loads classes for custom-tag for dynamic
          include files.
          Can anybody at BEA throw loght on this and the solution.
          Thanks in advance.
          Chandra


Well I found out jsp:include is not supported inside custom tags for JSP
          spec 1.1.
          This was stated in section 5.4.5 of spec 1.1.
          May be in future spec 1.2.
          Thanks
          Chandra
          "Cameron Purdy" <[email protected]> wrote in message
          news:[email protected]...
          > Have you sent this to [email protected]?
          >
          > It sounds serious.
          >
          > Peace,
          >
          > --
          > Cameron Purdy
          > Tangosol, Inc.
          > http://www.tangosol.com
          > +1.617.623.5782
          > WebLogic Consulting Available
          >
          >
          > "matthew mcclain" <[email protected]> wrote in message
          > news:[email protected]...
          > > I have run into the same problem.
          > > I'm certain it's because CustomTags have their own buffer and
          > > jsp:include or pageContext.include() or requestDispatcher.include()
          > > all bypass the buffer and write to the underlying stream.
          > >
          > > I attempted to define jspx:include by wrapping the response object
          > > which is sent to requestDispatcher.include and then wrapping the
          > > OutputStream returned from the response with a stream which
          > > writes to the "out" of the pageContext for my tag.
          > >
          > > Unfortunately, I get a class cast exception because weblogic expects
          > > it's own class to be there as a ServletOutputStream:
          > >
          > > java.lang.ClassCastException:
          com.allmystuff.wif.IncludeServletResponse$1
          > > at
          > >
          >
          weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImp
          > > l.java:202)
          > > at
          > >
          >
          weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImp
          > > l.java:172)
          > > at com.allmystuff.wif.Include.doStartTag(Include.java:37)
          > >
          > > So any chance, jsp:include will get fixed?
          > >
          > > Thanks,
          > > Matthew McClain
          > > [email protected]
          > >
          > >
          > > "chandra" <[email protected]> wrote in message
          > > news:[email protected]...
          > > > I call <jsp:include page="emailbody.jsp" /> within a custom tag(in a
          > file
          > > > caller.jsp), which does emailing.
          > > > When I invoke caller.jsp from browser, I do get the output(body of the
          > > > email) on the browser screen, but not the output is not send as the
          body
          > > of
          > > > the email.
          > > > When I use static include namely, <@include file="emailbody.jsp" />,
          the
          > > > output is directed to the body of the email.
          > > >
          > > > The above means, for a static jsp include file, it is parsed and
          > included
          > > in
          > > > the body-evaluation of the custom tag.
          > > > For a dynamic include file, it is NOT parsed and NOT included in the
          > > > body-evaluation of the custome tag.
          > > > The reason could be, How Weblogic loads classes for custom-tag for
          > dynamic
          > > > include files.
          > > > Can anybody at BEA throw loght on this and the solution.
          > > > Thanks in advance.
          > > > Chandra
          > > >
          > > >
          > >
          > >
          >
          >

Trying to create custom tag library

I'm a novice trying to create a simple custom tag library application. As such I need a couple import statements like
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext;
This statements will not compile. I'm using Java 2 1.4_03 and WSDP 1.3. My CLASSPATH currently holds
c:\jwsdp\common\lib\servlet-api.jar
and
c:\j2sdk\lib\mysql-connector-java-3.0.11-stable-bin.jar.
I've got JAVA_HOME set to c:\j2sdk and JWSDP_HOME set to c:\jwsdp.
Thank you very much for any assistance you are able to render.

Thanks for your reply. I'm using the TextPad editor, which uses CLASSPATH.
I've figured out the answer. I needed to add
c:\jwsdp\common\lib\jsp-api.jar
to my CLASSPATH.
Again, thanks.

Problem creating custom tags for site that has no outside internet connecti

I've created a set of custom tags that work fine until we install our app at the customer site. The customer site has no outside Internet access, and so the DOCTYPE is failing since it references the web-jsptaglibrary_1_1.dtd located on Sun's site.
I tried copying the dtd locally and got it to work, but the solution sucks because this web-jsptaglibrary_1_1.dtd file is referenced in both my taglib.tld file AND the web-jsptaglibrary_1_1.dtd itself. Soooo....I can put in a URL that references it on the local machine, e.g.,
In the taglib.tld file:
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.// DTD JSP Tag Library 1.1//EN"
"http://ClientAAA/web-jsptaglibrary_1_1.dtd">
In the web-jsptaglibrary_1_1.dtd file:
<!ATTLIST taglib id ID #IMPLIED
xmlns CDATA #FIXED
"http://ClientAAA/AdProduction/web-jsptaglibrary_1_1.dtd"
>
but that means for every client that uses this app (and we have several) I have to change that URL inside both these files.
I tried simply changing it to the relative "web-jsptaglibrary_1_1.dtd", e.g.,
taglib.tld:
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.// DTD JSP Tag Library 1.1//EN"
"web-jsptaglibrary_1_1.dtd">
web-jsptaglibrary_1_1.dtd:
<!ATTLIST taglib id ID #IMPLIED
xmlns CDATA #FIXED
"web-jsptaglibrary_1_1.dtd"
>
but then it is requiring me to put the dtd in both my web app root directory AND my jakarta/bin directory. I get the following error:
XML parsing error on file ../vtaglib.tld: java.io.FileNotFoundException: D:\jakarta\jakarta-tomcat-4.1.29\bin\web-jsptaglibrary_1_1.dtd (The system cannot find the file specified)
It seems like I must be missing something here. This shouldn't be this hard. And it seems funny that to use custom tags, you have to have Internet access in the first place.
Help!!! :)
Thanks.

Yeah, I think it's a bit ridiculous that in order to make all the tag library examples and instructions work, you have to have access to the Internet. I haven't seen a single example on how to make it work if there is no Internet access. That's very limiting. And I've tried all sorts of other ways of doing it, such as
<!DOCTYPE taglib SYSTEM "web-jsptaglibrary_1_1.dtd">
but even then it won't work because I get an error message saying:
XML parsing error on file /assets/../vtaglib.tld: java.io.FileNotFoundException: D:\jakarta\jakarta-tomcat-4.1.29\bin\web-jsptaglibrary_1_1.dtd (The system cannot find the file specified)
I just don't think I should have to place this file in the bin directory. There has to be another way. Do I need to modify the dtd somehow? Cuz the dtd has the following line...is this messing it up??
<!ATTLIST taglib id ID #IMPLIED xmlns CDATA #FIXED "web-jsptaglibrary_1_1.dtd">
I sure could use some help.

How to use custome tag lib in the JSP page?

How to use custome tag lib in the JSP page?...with JDeveloper

http://www.oracle.com/webapps/online-help/jdeveloper/10.1.2/state/content/navId.4/navSetId._/vtTopicFile.working_with_jsp_pages%7Cjsp_ptagsregistering~html/

Problem using custom tag library in portlet's jsp

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