when i click on java:/comp
<http://localhost:8080/ClientDAOTest/newjsp.jsp?path=java:/comp> it gave
error
Error: Cannot create resource instance
javax.naming.NamingException: Cannot create resource instance
at
org.apache.naming.factory.TransactionFactory.getObjectInstance(TransactionFactory.java:113)
at
javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
at org.apache.naming.NamingContext.lookup(NamingContext.java:793)
at org.apache.naming.NamingContext.lookup(NamingContext.java:140)
at
org.apache.naming.NamingContextBindingsEnumeration.nextElementInternal(NamingContextBindingsEnumeration.java:113)
at
org.apache.naming.NamingContextBindingsEnumeration.next(NamingContextBindingsEnumeration.java:71)
at org.apache.jsp.newjsp_jsp._jspService(newjsp_jsp.java:106)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
When I click onjdbc
<http://localhost:8080/ClientDAOTest/newjsp.jsp?path=java:comp/env/jdbc>
it give error
Error: Name jdbc is not bound in this Context
javax.naming.NameNotFoundException: Name jdbc is not
bound in this Context
at org.apache.naming.NamingContext.lookup(NamingContext.java:770)
at org.apache.naming.NamingContext.lookup(NamingContext.java:153)
at
org.apache.naming.factory.ResourceLinkFactory.getObjectInstance(ResourceLinkFactory.java:97)
at
javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
at org.apache.naming.NamingContext.lookup(NamingContext.java:793)
at org.apache.naming.NamingContext.lookup(NamingContext.java:140)
at
org.apache.naming.NamingContextBindingsEnumeration.nextElementInternal(NamingContextBindingsEnumeration.java:113)
at
org.apache.naming.NamingContextBindingsEnumeration.next(NamingContextBindingsEnumeration.java:71)
at org.apache.jsp.newjsp_jsp._jspService(newjsp_jsp.java:106)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
On 9/8/2011 5:11 PM, Christopher Schultz wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Anjib,
On 9/8/2011 4:51 PM, Anjib Mulepati wrote:
DataSource ds = null; try { 40. Context initCtx = new
InitialContext(); 41. Context envCtx = (Context)
initCtx.lookup("java:comp/env"); 42. ds = (DataSource)
envCtx.lookup("jdbc/dynic");
Odd to use a local variable for this, but I guess you could do that.
I've seen "java:comp/env" and "java:/comp/env", but both seem to work.
Try running this JSP. It's a bit fragile, but it should get the job done.
- -chris
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";>
<%@page pageEncoding="UTF-8"
session="false"
language="Java"
import="
javax.naming.InitialContext,
javax.naming.Binding,
javax.naming.Context,
javax.naming.NamingEnumeration,
javax.naming.NamingException
"
%>
<%
String path = "java:/comp/env";
String pathParam = request.getParameter("path");
if(null != pathParam&& !"".equals(pathParam.trim()))
path = pathParam.trim();
int pos = path.lastIndexOf('/');
String parent = pos> 0 ? path.substring(0, pos) : "java:comp/env";
%>
<html xmlns="http://www.w3.org/1999/xhtml"; xml:lang="en" lang="en">
<head>
<title>JNDI Browser:<%= path %></title>
</head>
<body>
<h1>JNDI Browser:<%= path %></h1>
<p><a href="?path=<%= parent %>"><%= parent %></a></p>
<%
InitialContext ctx = null;
NamingEnumeration e = null;
try
{
ctx = new InitialContext();
e = ctx.listBindings(path);
if(e.hasMoreElements())
{
%>
<ul>
<%
while(e.hasMoreElements())
{
Binding b = (Binding)e.next();
%>
<li>
<%
if(b.getObject() instanceof Context)
{
%>
<a href="?path=<%= path %>/<%= b.getName() %>"><%=
b.getName() %></a>
<%
}
else
{
%>
<%= b.getName() %> (<%= b.getClassName() %>)
<%
}
%>
</li>
<%
}
%>
</ul>
<%
}
else
{
%>
<p>JNDI context is empty</p>
<%
}
}
catch (NamingException ne)
{
%>
<p>Error:<%= ne.getMessage() %><pre>
<%
java.io.PrintWriter myout = new java.io.PrintWriter(out);
ne.printStackTrace(myout);
myout.flush();
%>
</pre></p>
<%
}
finally
{
if(null != e) try { e.close(); } catch (NamingException ne)
{ %><p><%= ne.getMessage() %></p><% }
if(null != ctx) try { ctx.close(); } catch (NamingException ne)
{ %><p><%= ne.getMessage() %></p><% }
}//foo
%>
</body>
</html>
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