OC4J & Java VM & Custom tags

I'm getting a NoClassDefFoundError, but the class is in orion.jar! Its javax.servlet.jsp.tagext.TagSupport. There is some code in a jar file (under WEB-INF/lib) that tries to use that class, but apparently can't find it. I'm baffled. I'm not using the JDK that comes with OC4J. I installed JDK1.3.1 in a parent directory, and set the PATH to the /bin directory of the newer JDK installation. Then from j2ee/home/ I start OC4J with the java -jar orion.jar command. Sound good so far? This method works just fine on one machine (test), but I'm trying to get this application going on a different machine (production)and that's the one I'm having trouble with. As far as I can tell, both machines are set up the same. I'm apparently not an expert on classloading, JAR files or how JVMs work with OC4J. What could've gotten so messed up?

Try replaciing tools.jar in $OC4J_HOME/j2ee/home with the newer version of tools.jar from $JDK_HOME/lib/tools.jar.
regards
Debu

Similar Messages

Custom Tag in race condition with OC4J v9.0.2.0.0...

Hello all,
(I tried deploying my application with OC4J 9.0.3 but none of my existing
tags worked)
I developed a OC4J web application implementing my own tag library extension
and found out that there was occurring a race condition to the fact that two
users (different sessions) where accessing the same
tag at the same time. In the offending tag implementation I only have
instance members and not static which could also cause a
concurrent access problem.
I found that OC4J was reusing concurrently the same
Tag instance when it should not do that!!!
public class pagesIteratorTag extends BodyTagSupport {
// only instance class members...
public void doInitBody() throws JspException {
System.out.println("pageSetIteratorTag::doInitBody - Tag instance value: " + this.toString() + " for user: " + this.pageContext.getSession().getAttribute("j_username"));
public int doAfterBody() throws JspException {
System.out.println("pageSetIteratorTag::doAfterBody - Tag instance value: " + this.toString() + " for user: " + this.pageContext.getSession().getAttribute("j_username"));
Note the pagesIteratorTag@2e same instance is used when it should not
1 because the tag instance should be protected from multiple concurrent
access even though it can be pooled and reused if it is free.
pageSetIteratorTag::doInitBody - Tag instance value: com.kdlabs.fogal.tagext.pagesIteratorTag@2e for user: Frank
pageSetIteratorTag::doAfterBody - Tag instance value: com.kdlabs.fogal.tagext.pagesIteratorTag@2e for user: Frank
pageSetIteratorTag::doInitBody - Tag instance value: com.kdlabs.fogal.tagext.pagesIteratorTag@2e for user: Giovanni
pageSetIteratorTag::doAfterBody - Tag instance value: com.kdlabs.fogal.tagext.pagesIteratorTag@2e for user: Giovanni
pageSetIteratorTag::doInitBody - Tag instance value: com.kdlabs.fogal.tagext.pagesIteratorTag@2e for user: Giovanni
pageSetIteratorTag::doAfterBody - Tag instance value: com.kdlabs.fogal.tagext.pagesIteratorTag@2e for user: Giovanni
Session for user Frank throws a null pointer exception because Giovanni's session
started accessing the variable.
Can anyone advise please?
Best Regards,
Giovanni

First of all, you said none of your tags worked in 9.0.3. What happened? Did you do any debugging of the problem?
Comparing the "toString()" output of your tag does not guarantee they are the same instance. That is just the output of "hashcode()", not the "pointer" to the object. The hashcode is generated from the contents of the object, not its "identity".
I suggest you track the NPE in the debugger and get more information before you assume the container is at fault (which is still an outside possibility). SDK API Javadoc
Object class:
The general contract of hashCode is:
1-. Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
So, the toString() is properly returning the suffix of the object instance
number unique for that instance and is then being reused by OC4J even though
it is being accessed from another session thread, that must not happen and it
is not compliant with the JSP spec.
The other history is that when I implemented my custom tags OC4J was JSP 1.1 compliant
and not 1.2, so after moving to 1.2 the scripting variables can be defined in XML and
by subclassing TagInfo class, the last option doesn't work with OC4J 9.0.3, not good...
Thanks for your help,
I will keep trying to figure out what the problem migth be,
Best Regards,
Giovanni

How to use a variable of jsp custom tag in my java code?

hi folks,
i got a folderList tag like this:
ArrayList list = new ArrayList(20);
%>
<foo:folderList path="${attributes.newsPath}" var="year" contentType="folder">
<%
          list.add(${year.contentEntryName});   // of course, this doesn't work
%>
</foo:folderList>I think, its clear what I want to do. I am just wondering how I can use my Variable "year" in the Java code between <% %>...

<% list.add(year.getContentEntryName()); %>
You have to have defined in the custom tag that "var" relates to a scripting variable that you want defined.
<tag>
<variable>
    <name-given>var</name-given>
    <variable-class>myPackage.myClass</variable-class>
    <declare>true</declare>
    <scope>NESTED</scope>
</variable>
</tag> Cheers,
evnafets

Installing java custom tag

I'm trying to install a custom tag written in java
(cfx_ExcelQuery) and am not having any success.
The tag was in a .jar file which I downloaded to the server
and extracted to the /classes subdirectory. The actual .class file
ended up in a subdirectory several levels below.
I registered the tag as ExcelQuery and wrote a test program
to call the tag according to the specs.
I got a CF error indicating the tag didn't exist until I
added the directory path containing the .class file (the exact
subdirectory). Now I get an internal server error instead (progress
I guess).
I have no experience installing/using java custom tags so I
may be missing something that would be obvious to someone else.
If anyone has any ideas please let me know.
Thanks,
Ken

I got this error:
Error processing CFX custom tag CFX_net.sourceforge.openxcf.javacfx.text2query.
The CFX custom tag CFX_net.sourceforge.openxcf.javacfx.text2query was not found in the custom tag database. You must add custom tags to the database before using them. If you have added your tag to the database, check the spelling of the tag within your template to ensure that it matches the database entry.
The error occurred in C:\Inetpub\wwwroot\scratch\DataLoad\checkGradData_NEW_July.cfm: line 191
189 :
190 :      <cfx_text2Query
191 :       file="#FeedPath##FileName#"
192 :       firstRowIsHeader="false"
193 :       delimiter="#chr(9)#"

Custom tags v/s java beans

Hi all,
Is there any thumb rule when to use Custom Tag and when to use Java Beans.
I feel we can get the solution using either of them.
Am I right?
Cheers

Hi all,
Is there any thumb rule when to use Custom Tag and
when to use Java Beans.
I feel we can get the solution using either of them.
Am I right?
Usually you can indeed use either. Custom tags will create cleaner JSPs with less (if any) Java code, which makes it a lot easier for non-Java people to maintain them.
Custom beans are often quicker to create, and therefore better suited as interim solutions or for pages that won't be around for long (maybe that one-time action?).
Of course custom tags will often also make use of beans :)

IOException when flush is called from a custom tag

Thanks is advance for the help. I've encountered an oddity in OC4J 10.1.3 Standalone using java 1.5 the 2.4 servlet spec and struts 1.1 and I'm wondering how to resolve it. In our current application we use custom tags to define certain fields. Every tag in our web front end does the same thing.
<pre>
JspWriter writer = pageContext.getOut();
writer.print(sb.toString());
writer.flush();
</pre>
I would understand if the tag was calling a commit then flush and then trying to write to the buffer again. That should raise this exception. We have tags that do the same thing without issue, But some others fail. This is the stack trace we see in the logs.
<pre>
WARN - SpecialReviewTag.doStartTag() IOException:
java.io.IOException: InValid to flush BodyContent: no backing stream behind it
at com.evermind.server.http.EvermindBodyContent.flush(EvermindBodyContent.java:213)
at xxx.xxxx.xxxxx.xxxxxx.receiving.struts.tag.SpecialReviewTag.doStartTag(SpecialReviewTag.java:198)
at receiving.item__receipt__items._jspService(_item__receipt__items.java:897)
at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59)
at oracle.jsp.runtimev2.JspPageTable.compileAndServe(JspPageTable.java:724)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:414)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
</pre>
Here is where the oddity comes into play. The page still renders all the needed information for the user. The problem lies with this exception being flooded into our production logs.
This is the web.xml file being used to define our .jsp configuration
<pre>
<jsp-property-group>
<display-name>Ignore EL</display-name>
<url-pattern>*.jsp</url-pattern>
<el-ignored>true</el-ignored>
<scripting-invalid>false</scripting-invalid>
<is-xml>false</is-xml>
</jsp-property-group>
</pre>
One other not these tags worked fine in the OC4J 10.1.2 Container this happened after the conversion to OC4J 10.1.3
Thanks alot for the help,
Charles
Edited by: CharMow on Feb 11, 2009 5:14 AM

Hi,
I am also getting the same error, when we move to OC4J 10.1.3.
If you find any solution for this please let me know, Thanks in advance.
Following the stack trace..
Can't insert page '/main.jsp' : InValid to flush BodyContent: no backing stream behind it java.io.IOException: InValid to flush BodyContent: no backing stream behind it at com.evermind.server.http.EvermindBodyContent.flush(EvermindBodyContent.java:213) at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:878) at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:473) at layouts.leftLayout._jspService(_leftLayout.java:126) at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:462) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:713) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370) at com.evermind.server.http.ServletRequestDispatcher.unprivileged_forward(ServletRequestDispatcher.java:259) at com.evermind.server.http.ServletRequestDispatcher.access$100(ServletRequestDispatcher.java:51) at com.evermind.server.http.ServletRequestDispatcher$2.oc4jRun(ServletRequestDispatcher.java:193) at oracle.oc4j.security.OC4JSecurity.doPrivileged(OC4JSecurity.java:283) at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:198) at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069) at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:274) at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455) at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:320) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507) at javax.servlet.http.HttpServlet.service(HttpServlet.java:743) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:713) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370) at com.evermind.server.http.ServletRequestDispatcher.unprivileged_forward(ServletRequestDispatcher.java:259) at com.evermind.server.http.ServletRequestDispatcher.access$100(ServletRequestDispatcher.java:51) at com.evermind.server.http.ServletRequestDispatcher$2.oc4jRun(ServletRequestDispatcher.java:193) at oracle.oc4j.security.OC4JSecurity.doPrivileged(OC4JSecurity.java:283) at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:198) at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069) at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:274) at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:254) at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:309) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507) at javax.servlet.http.HttpServlet.service(HttpServlet.java:743) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:713) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370) at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871) at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453) at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:221) at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:122) at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:111) at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260) at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303) at java.lang.Thread.run(Unknown Source)
Thanks,
Jam

Tomcat4: Illegal to flush within a custom tag

I tried to deploy to Tomcat4.1.18 a jsp-struts application developed with JDeveloper 9.0.3.1, simply obtained using the "Complete Struts-Based JSP Application" Wizard.
When I access to a page containing the
"jbo:DataRecord" tag or the "jbo:DataTable" I get this exception in the error log file (I do not know if other tags give this same error, but for example "jbo:DataScroller" does not):
2003-04-15 09:28:35 ApplicationModule release mode is: Stateful
2003-04-15 09:28:36 jsp: init
2003-04-15 09:28:37 jsp: init
2003-04-15 09:28:37 IO Error
java.io.IOException: Illegal to flush within a custom tag
     at javax.servlet.jsp.tagext.BodyContent.flush(BodyContent.java:115)
     at oracle.jbo.html.jsp.datatags.ComponentTag.doStartTag(ComponentTag.java:69)
     at org.apache.jsp.PazientiDateEventiViewLink1_0005fDateEventiEventiViewLink1$jsp._jspService(PazientiDateEventiViewLink1_0005fDateEventiEventiViewLink1$jsp.java:157)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:202)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:382)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:474)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:683)
     at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:431)
     at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:355)
     at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1014)
     at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:417)
     at org.apache.struts.action.RequestProcessor.processActionForward(RequestProcessor.java:390)
     at oracle.jbo.html.struts11.BC4JRequestProcessor.processActionForward(BC4JRequestProcessor.java:98)
     at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:271)
     at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1292)
     at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:492)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:429)
     at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:495)
     at java.lang.Thread.run(Thread.java:484)
2003-04-15 09:28:46 jsp: init
2003-04-15 09:28:46 ApplicationModule release mode is: Stateful
Deploying on a standalone OC4J everything works.
Is there some configuration to add to the web.xml file or somewhere else? I tried also on Tomcat 4.0.3 with same results.
I added this lines in web.xml to avoid the problems descripted in thread BC4J entity objects vs EJB2.0 entity beans
<init-param>
<param-name>enablePooling</param-name>
<param-value>false</param-value>
</init-param>
Other non-struts-based webapps developed with JDev 9.0.2 and 9.0.3 were deployed correctly on Tomcat 4.1.18.
Thanks,
Marco.

Hi Steve,
I looked better at my page and it has been modified from that produced by the wizard. In fact, the problem arises substituting a DataTable tag with a RowsetIterate in which I put a DataRecord.
Here there is a simple page which produces this error (I see the error only in the error log of Tomcat localhost_log.txt, not on the page):
<%@ page language="java" import="oracle.jbo.*" errorPage="errorpage.jsp" contentType="text/html;charset=windows-1252" %>
<%@ taglib uri="/webapp/DataTags.tld" prefix="jbo" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<html>
<head>
<META NAME="GENERATOR" CONTENT="Oracle JDeveloper">
<LINK REL=STYLESHEET TYPE="text/css" HREF="bc4j.css">
<TITLE><bean:message key="browse.title"/></TITLE>
</head>
<body>
<jbo:DataTransaction appid="Test3Module" />
<h3><bean:message key="browse.header" arg0="CategoryView1"/></h3>
<table border="0">
<tr>
<td ALIGN="right"><jbo:DataScroller datasource="Test3Module.CategoryView1"/></td>
</tr>
<tr>
<%-- REPLACED DataTable WITH a RowsetIterate in which I put a DataRecord --%>
<jbo:RowsetIterate datasource="Test3Module.CategoryView1" userange="true" >
<td>
<jbo:DataRecord datasource="Test3Module.CategoryView1" />
</td>
</jbo:RowsetIterate>
<%--
<td><jbo:DataTable datasource="Test3Module.CategoryView1" edittarget="/edit_CategoryView1.do"/></td>
--%>
</tr>
</table>
</body>
</html>
In this case, it is not so hard to avoid to put in the pages such a code.
Thanks,
Marco.

Jsp 2.0 and jdev 10g production (custom tags)

there are some examples at
http://otn.oracle.com/sample_code/tech/java/jsps/index.html
I have certian questions it would be great if some one would clear these for me..
In JSP 1.2 if we wanted to write the custom tag's we had tag classes that extend TagSupport or TagBodySupport and the doStart() and doEnd() tag with the evaluate body. I could spit out the complete html text on an encounter of a tag! but in the JSP 2.0 a doTag() seems to take care of the intracies! how??
Now with jsp 2.0 I want to do the same... say some thing like this ....
<tg:myTag list="${somelist}"></tg:myTag> and say in my tag handler class I know what to do with this list. May be I will create complete html code and will use jspWriter to write out the html inbetween these tags!!
I have downloaded the eStore example but this class
javax.servlet.jsp.tagext.SimpleTagSupport; is not imported. So I am not able to look at the SimpleTagSupport class.
If I am trying to run the example in jdev 10g production should I have to specify that I am using jsp 2.0 so that jdev knows not to use jsp 1.2? if so how can I do this.
Does all the examples provided use the OC4J standalone? Can I use the embedded oc4J instead?
regards.

After reading a bit more now I know how the tags work.
However from the example I see (eStore) an array called by name "products" is created and set on the jspContext. If I already have the list and want to pass on the list which is in a bean or a session or a request can I provide it this way.
<tag:myTag var=${bean.list}>
or
<tag:myTag var=${session.list}>
or
<tag:myTag var=${request.list}>in the .tld file I should specify the attribute var and whether it should be runtime evaluable.
and in the TagClass
private Collection var;
private String listName;
public void setVar(Colloection aList) {
this.var = aList;
public Collection getVar() {
return var;
public void doTag( ) throws JspException{
// do i always need to this next line ------
getJspContext( ).setAttribute(listName, getVar());
}so that in my .tag file I can use some thing like this
<c:forEach var="list" items="${item}">
<td>${item.subObject.name}</td>
<td>${item.subObject.value}</td>
</c:forEach>And finally... as and when a tag is encountered the .tag file contents corresponding to that tag is called to get the html text and all that text is printed out in the jsp page right (without the jspWriter "out"). How does the browser know when to stop? like doEndTag() function? are these functions implicitly called?
regards.

Why doesn't my custom tag work?

First, my backend database is MS Access. Nothing I can do about that, unfortunately.
I have defined three custom tags (no body, no attributes) to display report information from my project tracking/metrics Access database:
<prefix:showProjectInfo />
<prefix:showProjectTeam />
<prefix:showProjectHistory />
In my JSP, the first tag I use, <prefix:showProjectInfo />, works perfectly. However, <prefix:showProjectTeam /> gives no output.
First, here is the tld file that defines the tags (report.tld):
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE taglib
        PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
        "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
    <tlib-version>1.0</tlib-version>
    <jsp-version>1.2</jsp-version>
    <short-name>report</short-name>
    <uri>/report</uri>
    
    
   
   <tag>
        <name>showProjectInfo</name>
        <tag-class>mil.usaf.rad.metrics.report.showProjectInfoTag</tag-class>
        <body-content>empty</body-content>
        <description>Shows the basic project information</description>
   </tag>
   <tag>
        <name>showProjectTeam</name>
        <tag-class>mil.usaf.rad.metrics.report.showProjectTeamTag</tag-class>
        <body-content>empty</body-content>
   </tag>
   <tag>
        <name>showProjectHistory</name>
        <tag-class>mil.usaf.rad.metrics.report.showProjectHistoryTag</tag-class>
        <body-content>empty</body-content>
   </tag>
</taglib>Next, here is the relevant section of web.xml that defines this taglib:
<taglib>
        <taglib-uri>/WEB-INF/report.tld</taglib-uri>
        <taglib-location>/WEB-INF/report.tld</taglib-location>
</taglib>Next, the code for showProjectTeamTag.java:
* showProjectTeam.java
* Created on March 9, 2005, 10:46 AM
package mil.usaf.rad.metrics.report;
import java.io.*;
import java.sql.*;
import java.lang.Integer;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
* @author jason.ferguson
public class showProjectTeamTag extends TagSupport
    public showProjectTeamTag()
        super();
    public int doAfterBody() throws JspException
        HttpServletRequest req = (HttpServletRequest) pageContext.getRequest();
        int pr_id = Integer.parseInt(req.getParameter("pr_id"));
        JspWriter out = pageContext.getOut();
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;
        try
           out.print("test");
           Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
           conn = DriverManager.getConnection("jdbc:odbc:Metrics");
        catch (Exception e)
            throw new JspException(e.getMessage());
        String queryGetTeam = "SELECT Projects.pr_id, Accounts.name AS Name, Sum(Schedule.hours) AS SumOfhours FROM tblTAAccounts AS Accounts INNER JOIN ((tblTAScheduleEntries AS Schedule INNER JOIN tblProjectRelease AS ProjectRelease ON Schedule.projectID = ProjectRelease.tblFKTimeAccntProject) INNER JOIN tblPMProjects AS Projects ON ProjectRelease.Release_ID = Projects.pr_id) ON Accounts.accountID = Schedule.accountID WHERE Projects.pr_id=" + pr_id + " GROUP BY Projects.pr_id, Accounts.name, ProjectRelease.Release_number, Projects.Project_name";
        try
            out.print(queryGetTeam);
            stmt = conn.createStatement();
            rs = stmt.executeQuery(queryGetTeam);
            if (rs == null)
                out.print("No Results!");
            out.print("<table>\n");
            out.print("<tr>\n");
            out.print("<th>Name</th>\n");
            out.print("<th>Total Hours</th>\n");
            out.print("</tr>\n");
            while(rs.next())
                out.print("<tr>\n");
                out.print("<td>" + rs.getString("Name") + "</td>\n");
                out.print("<td>" + rs.getInt("SumOfhours") + "</td>\n");
                out.print("</tr>\n");
            out.print("</table>\n");
            rs.close();
            stmt.close();
            conn.close();
        catch (Exception e)
            throw new JspException(e.getMessage());
        return SKIP_BODY;
}Finally, projectdetail.jsp, where the tag is called:
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%@page import="java.sql.*" %>
<%@page import="java.lang.Integer" %>
<%@taglib uri="/WEB-INF/report.tld" prefix="report" %>
<html>
<head><title>Project Detail</title></head>
<body>
<h1 align="center">Project Status</h1>
<h3>Project Description</h3>
<report:showProjectInfo />
<h3>Team Members</h3>
<report:showProjectTeam />
</body>
</html>The first tag, <report:showProjectInfo />, works fine. However, I get no output whatsoever when the system encounters <report:showProjectTeam />. I am a relative newbie at this, so any help is appreciated.
Jason

It doesnt seem to matter if the code is in doStartTag(), doEndTag(), orr any of the other functions.
I also put, as the first item in the function:
System.out.println("TEST");Nothing.
Just as an aside, here is the code for the <prefix:showProjectInfo />. Maybe I made a mistake in it? I closed the resultset and connection...
import java.io.*;
import java.sql.*;
import java.lang.Integer;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
* @author jason.ferguson
public class showProjectInfoTag extends BodyTagSupport
    public int doEndTag() throws JspException
        HttpServletRequest req = (HttpServletRequest) pageContext.getRequest();
        int pr_id = Integer.parseInt(req.getParameter("pr_id"));
        JspWriter out = pageContext.getOut();
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;
        try
           Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            conn = DriverManager.getConnection("jdbc:odbc:Metrics");
        catch (Exception e)
            throw new JspException(e.getMessage());
        String queryProjectInfo = "SELECT * FROM tblPMProjects WHERE pr_id=" + pr_id;
        try
            stmt = conn.createStatement();
            rs = stmt.executeQuery(queryProjectInfo);
            while (rs.next())
                out.print("<table border=\"1\" style=\"border-collapse:collapse\">\n");
                out.print("<tr>\n");
                out.print("<td><b>Project Name:</b>" + rs.getString("Project_name") + "</td>\n");
                out.print("<td align=\"right\"><b>RAD Number:</b>" + rs.getString("tblProjectNumber") + "</td>\n");
                out.print("</tr>\n");
                out.print("<tr>\n");
                out.print("<td>Project description: " + rs.getString("Project_description") + "</td>\n");
                out.print("</tr>\n");
                out.print("<tr>\n");
                out.print("<td>Customer: " + rs.getString("Customer_POC") + "</td>");
                out.print("<tr>\n");
                out.print("<tr>\n");
                out.print("<td>Customer Unit: " + rs.getString("Customer_OFC") + "</td>\n");
                out.print("</tr>\n");
                out.print("<tr>\n");
                out.print("<td>Customer Phone: " + rs.getString("Customer_phone") + "</td>\n");
                out.print("</tr>\n");
                out.print("</table>\n");
                rs.close();
                stmt.close();
                conn.close();
        catch (Exception e)
            throw new JspException(e.getMessage());
        finally
            //conn.close();
        return SKIP_BODY;

Weblogic Commerce Server 3.5 runtime failure in custom tag

An error occurred:
javax.servlet.ServletException: runtime failure in custom tag 'process'
     at jsp_compiled._tools._property._propset_create._jspService(_propset_create.java:641)
     at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
     at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:208)
     at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:149)
     at com.beasys.commerce.foundation.flow.ServletDestinationHandler.handleDestination(ServletDestinationHandler.java:51)
     at com.beasys.commerce.foundation.flow.FlowManager.service(FlowManager.java:540)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:208)
     at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:1127)
     at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:1529)
     at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137)
     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)

I just started getting this error after a year in production environment without any problems. Did you every find out what caused this or better yet how to prevent this?
          Dan.

Connection Pooling and JSP Custom Tag Library - is code (inside) the best way/correc?

Hi, can anyone advise as to whether my tag library code (based
on Apache Jakarta Project) will actually achieve connection
pooling functionality across my entire JSP based application? I
am slightly concerned that my OracleConnectionCacheImpl object
may exist multiple times, hence rendering my conection pooling
attempt useless.
package com.solved.tag.dbtags.connection;
import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import javax.servlet.jsp.tagext.TagSupport;
import javax.servlet.jsp.JspTagException;
import javax.sql.DataSource;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import oracle.jdbc.pool.OracleConnectionCacheImpl;
* <p>JSP tag connection, used to get a
* java.sql.Connection object.</p>
* <p>JSP Tag Lib Descriptor
* <pre>
* <name>connection</name>
<tagclass>com.solved.tag.dbtags.connection.ConnectionTag</t
agclass>
* <bodycontent>JSP</bodycontent>
<teiclass>com.solved.tag.dbtags.connection.ConnectionTEI</t
eiclass>
* <info>Opens a connection based on a jndiName.</info>
* <attribute>
* <name>id</name>
* <required>true</required>
* <rtexprvalue>false</rtexprvalue>
* </attribute>
* </pre>
* @author Matt Shannon
public class ConnectionTag extends TagSupport {
static private OracleConnectionCacheImpl cache = null;
public int doStartTag() throws JspTagException {
try {
Connection conn = null;
if (cache == null) {
try {
InitialContext ic = new InitialContext();
DataSource ds = (DataSource) ic.lookup
("jdbc/pool/OracleCache");
cache = (OracleConnectionCacheImpl)ds;
catch (NamingException ne) {
throw new JspTagException(ne.toString());
conn = cache.getConnection();
pageContext.setAttribute(getId(),conn);
catch (SQLException e) {
throw new JspTagException(e.toString());
return EVAL_BODY_INCLUDE;
package com.solved.tag.dbtags.connection;
import java.sql.Connection;
import java.sql.SQLException;
import javax.servlet.jsp.tagext.TagSupport;
* <p>JSP tag closeconnection, used to close the
* specified java.sql.Connection.<p>
* <p>JSP Tag Lib Descriptor
* <pre>
* <name>closeConnection</name>
<tagclass>com.solved.tag.dbtags.connection.CloseConnectionTag&
lt;/tagclass>
* <bodycontent>empty</bodycontent>
* <info>Close the specified connection. The "conn"
attribute is the name of a
* connection object in the page context.</info>
* <attribute>
* <name>conn</name>
* <required>true</required>
* <rtexprvalue>false</rtexprvalue>
* </attribute>
* </pre>
* @author Matt Shannon
* @see ConnectionTag
public class CloseConnectionTag extends TagSupport {
private String _connId = null;
* The "conn" attribute is the name of a
* page context object containing a
* java.sql.Connection.
* @param connectionId
* attribute name of the java.sql.Connection to
close.
* @see ConnectionTag
public void setConn(String connectionId) {
_connId = connectionId;
public int doStartTag() {
try {
Connection conn = (Connection)pageContext.getAttribute
(_connId);
conn.close();
} catch (SQLException e) {
// failing to close a connection is not fatal
e.printStackTrace();
return EVAL_BODY_INCLUDE;
public void release() {
_connId = null;
package com.solved.tag.dbtags.connection;
import javax.servlet.jsp.tagext.TagData;
import javax.servlet.jsp.tagext.TagExtraInfo;
import javax.servlet.jsp.tagext.VariableInfo;
* TagExtraInfo for the connection tag. This
* TagExtraInfo specifies that the ConnectionTag
* assigns a java.sql.Connection object to the
* "id" attribute at the end tag.
* @author Matt Shannon
* @see ConnectionTag
public class ConnectionTEI extends TagExtraInfo {
public final VariableInfo[] getVariableInfo(TagData data)
return new VariableInfo[]
new VariableInfo(
data.getAttributeString("id"),
"java.sql.Connection",
true,
VariableInfo.AT_END
data-sources.xml:
<?xml version="1.0"?>
<!DOCTYPE data-sources PUBLIC "Orion data-
sources" "http://xmlns.oracle.com/ias/dtds/data-sources.dtd">
<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" />
<property name="password" value="console" />
<description>
This DataSource is using an Oracle-native DataSource Class so as
to allow Oracle Specific extensions.
A getConnection() call on this DataSource will return
oracle.jdbc.driver.OracleConnection.
The connection returned is a logical connection.
The caching scheme in place is Fixed Wait. Refer below to
possible values.
Dynamic 1
Fixed Wait 2
Fixed Return Null 3
</description>
</data-source>
</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.
When I created jsp page to connect to the connection pool using sqltags custom tag library, I am getting the error
"javax.servlet.jsp.JspException: Failed to write body content
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

Is possible to write a custom tag inside another custom tag ??

Hi
I�m trying to reduce the time needed to code mi app presentation layer, it uses some custom tags with certain configuration, i would like to know if its possible to do something like this inside my custom tag doAfterBody().
public int doAfterBody() throws JspException {
          JspWriter writer=bodyContent.getEnclosingWriter();
          try {
               writer.print("<customTag:myAnotherTag someEspecificConfigurationParams="someEspecificValues"/>");
          } catch (IOException e) {
               pageContext.getServletContext().log("Error: "+e.getMessage());
          }return SKIP_BODY;
     }The goal is to simplify the jsp code because the configuration params for the custom tags (css styles and similar) are allways the same.
That don�t work, it simply prints <customTag:myAnotherTag/> in screen but the tag is not evaluated, i�ve tried too something like
public int doAfterBody() throws JspException {
          if (repeat) {
               JspWriter writer = bodyContent.getEnclosingWriter();
               try {
                    writer.print("<customTag:myAnotherTag/>");
               } catch (IOException e) {
                    pageContext.getServletContext().log("Error: " + e.getMessage());
               repeat = false;
               return EVAL_BODY_AGAIN;
          return SKIP_BODY;
     }And it doesn�t worked worked. Maybe using the taghandler classes and calls to the doAfterBody could make it work, but when you need to nest tags it could be a little hell of coupling calls, so before doing it i would like to know if what i want is possible. After reading some books i tought it could work because the stack of out objects, but i can�t make it work.
Another idea is to inherit from tagHandler and override some properties in the tags, but i don�t like the idea to much.
So, can anyone help me??
Thanks.

You cannot do that and I have listed out the reason and a possible solution in this post http://forum.java.sun.com/thread.jspa?threadID=697243 from yesterday.
cheers,
ram.

Make new custom tag in A2

Good evening,
I'm trying to add a custom tag to an image in Aperture 2.0. I've looked all over the internet and find no examples what so ever of AS and Aperture 2.0.
I have a few guesses that produce one of two different errors - but no idea how to actually make this work. Any ideas ?
tell application "Aperture"
copy selection to theSel
repeat with curImg in theSel
class of curImg
--image version
-- make new custom tag at curImg with properties {name:"NewTag", value:"New Tag's Value"}
-- set aNewTag to make new custom tag with properties {name:"NewTag", value:"New Tag's Value"}
-- Aperture got an error: Can’t make or move that element into that container.
-- make new custom tag at end of curImg with properties {name:"NewTag", value:"New Tag's Value"}
-- make new custom tag at end of (curImg) with properties {name:"NewTag", value:"New Tag's Value"}
-- make new custom tag at end of custom tags of curImg with properties {name:"NewTag", value:"New Tag's Value"}
-- make new custom tag at end of curImg's custom tags with properties {name:"NewTag", value:"New Tag's Value"}
--Aperture got an error: Can’t make application "Aperture" into type specifier.
end repeat
end tell

If I recall, it was done because how tags were to be handled in 1.2 was very different from 1.1 and it was felt that developers shouldn't rely on implementation specific classes (unless they were SPI) for several other reasons (application portability being the big one here).
If it's felt that this was the wrong decision, please feel free to log an issue [1] against the RI (to date, no one has).
As to the 'borked' dependency URLs, please log an issue [1] if you find these. We have nightly builds going that work from a clean workspace and checking today's result, it seems ok.
[1] https://javaserverfaces.dev.java.net/issues

Passing Javascript Enabled or Disabled value in a custom tag

Hi,
In my JSP I am using a custom tag.
This custom tag is having one attribute called status(whose value will be jsenabled means true or jsdisabled means false) depending on the browser's javascript enabled or disabled
How can i find the value of javascript enabled or javascript disabled and set the value of the attribute status in my jsp.
This is the custom tag
<t:tab summary="tabs" url="/services/eservicepac/registrationprocess/process.wss" tabNames='<%=tabList%>' currentTab="<%=currentTab%>" zone="WWW_ZONE" fetchText="false" status=" "
</t:tab>
The value of this attribute status=" " should be the value of jsenabled or disabled.
Since the user can visit any page at any time, the jsenabled value is not maintained in session or request, so i can't take from session or request also.
As this is urgent,
--I am expecting the reply

Hi Merlin,
In addition to what was written above, you must make sure that you tell your web application to run as a JSP 2.0 web application.
You do this by defining your web.xml a little differently. Like this at the top:
<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 web-app_2_4.xsd">
That should be what you need to get it working correctly.
Damian Sutton

How to create a custom tag for a custom converter

In Jdeveloper 11g, I have a project where I have created a custom converter class that impements the javax.faces.convert.Converter class. I have registered the converter with an id in the faces-config.xml file of the project, and the converter works fine by using the <f:converter type="myconverter"> tag. However, the custom converter has a field which I would like to set from the tag itself. Hence, I would like to add an attribute to <f:converter> tag if possible or create a custom tag that has the attribute.
I have done some reserach and I found that a custom tag can be implemented: I need to create a class which extends from the ConverterTag class or javax.faces.webapp.ConverterElTag class, which I did, but I also need to create ".tld" (tag library) file which defines the tag itself.
The part about creating the ".tld" file and registring the new tag is what I'm not sure how to do.
Does someone know how to do this?
thank you

Hi frank,
that's a good document, and it explains how to make a custom converter. I already created the custom converter, it converts a number to any currency pattern. I know java already has a currency converter, but it doesn't support Rupee currency format, and I need that format.
My converter works, but I would like to pass the pattern of the format through an attribute in a tag. Since f:converter doesn't seem to support that, I created a custom tag which uses my converter, and it enables me to pass a pattern to the converter.
All of that works, but I need to be able to pass the pattern as an EL expression, and it's not evaluating the expression before passing it to the converter. It just passes the whole expression as a string. I'm thinking It may be something I'm doing wrong.
this is the tag library definition file:
<!DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
<tlib-version>1.2</tlib-version>
<jsp-version>2.1</jsp-version>
<short-name>custom</short-name>
<uri>custom-currency-converter</uri>
<description>
custom currency custom tag library
</description>
<tag>
<name>CurrencyConverter</name>
<tag-class>
converter.Tag.CurrencyConverterTag
</tag-class>
<body-content>JSP</body-content>
<attribute>
<name>pattern</name>
<type>java.util.String</type>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
</taglib>
Edited by: Abraham Ciokler on Feb 4, 2011 11:20 AM

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