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From: Martin Gainty <mgainty@hotmail.com>
To: Tomcat Users List <users@tomcat.apache.org>
Subject: RE: Problem with JNDI environment entry resources
Date: Tue, 2 Sep 2008 20:35:19 -0400
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http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html=
<BR>
/WEB-INF/web.xml contents which contain a jndi reference <BR><web-app xmlns=
=3D"http://java.sun.com/xml/ns/j2ee"<BR>
    xmlns:xsi=3D"http://www.w3.org/2001/XMLSchema-instance"<BR>
    xsi:schemaLocation=3D"http://java.sun.com/xml/ns/j2ee<BR>
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"<BR>
    version=3D"2.4"><BR>
  <description>MySQL Test App</description><BR>
  <resource-ref><BR>
      <description>DB Connection</description><BR>
      <res-ref-name>teststring</res-ref-name><BR>
      <res-type>javax.sql.DataSource</res-type><BR>
      <res-auth>Container</res-auth><BR>
  </resource-ref><BR>
</web-app><BR>

the lookup to teststring will get you a connection to the DB<BR>

HTH<BR>
Martin<BR>
______________________________________________=20
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=20


> Date: Wed=2C 3 Sep 2008 01:01:40 +0100
> From: sip.sniffa@gmail.com
> To: users@tomcat.apache.org
> Subject: Problem with JNDI environment entry resources
>=20
> Tomcat 6.0.18
> java version "1.6.0_06" (sun-java6-jdk on Ubuntu 8.04 i386)
>=20
> I'm attempting to create environment entry resources=2C of type
> java.lang.String=2C within conf/server.xml and access them from web
> applications using JNDI. I've created a bare-bones test web app=2C
> jndistring=2C with the following conf/server.xml configuration:
>=20
> server.xml (snipped):
> -----------------------------
>       <Host name=3D"localhost"
>             appBase=3D"webapps"
>             unpackWARs=3D"true"
>             autoDeploy=3D"false"
>             deployOnStarup=3D"true"
>             xmlValidation=3D"false"
>             xmlNamespaceAware=3D"false">
>=20
>             <Context docBase=3D"jndistring.war"
>                     path=3D"jndistring"
>                     useNaming=3D"true">
>=20
>                 <Environment name=3D"teststring"
>                     value=3D"a test value"
>                     type=3D"java.lang.String"
>                     override=3D"false"
>                 />
>             </Context>
>=20
>       </Host>
>=20
> For the purpose of this test I've used jsp to access the value of teststr=
ing.
>=20
> jndistring.jsp (snipped):
> --------------------------------
> <%
> Context initCtx =3D new InitialContext()=3B
> Context envCtx =3D (Context) initCtx.lookup("java:comp/env")=3B
>=20
> String teststring =3D (String) envCtx.lookup("teststring")=3B
> out.println("teststring: " + teststring)=3B
> %>
>=20
> Accessing this page throws an exception:
> org.apache.jasper.JasperException: An exception occurred processing
> JSP page /test.jsp at line 18
> 15: Context initCtx =3D new InitialContext()=3B
> 16: Context envCtx =3D (Context) initCtx.lookup("java:comp/env")=3B
> 17:
> 18: String teststring =3D (String) envCtx.lookup("teststring")=3B
> 19: out.println("teststring: " + teststring)=3B
> 20: %>
>=20
> The top frame of the root cause is shown as:
> javax.servlet.ServletException: javax.naming.NameNotFoundException:
> Name teststring is not bound in this Context
>=20
> If I attempt to create an environment entry resource using
> <env-entry/> (and sub-elements) within web.xml=2C then the resource is
> created and I can access it!!!
>=20
> I've read the "JNDI resources howto"=2C docs regarding the <Host/>=2C
> <Context/> and <Environment/> elements (and others)=2C but don't see
> that I have missed anything.
>=20
> Can anyone suggest what I might have missed? Has anyone else had
> similar problems?
>=20
> Thanks=2C
>=20
> Paul.
>=20
> ---------------------------------------------------------------------
> To start a new topic=2C e-mail: users@tomcat.apache.org
> To unsubscribe=2C e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands=2C e-mail: users-help@tomcat.apache.org
>=20

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