Tomcat vs Weblogic JNDI Lookup

Question

The Weblogic servers we are using have been configured to allow JNDI datasource names like "appds".

For development (localhost), we might be running Tomcat and when declared in the <context> section of server.xml, Tomcat will hang JNDI datasources on "java:comp/env/jdbc/*" in the JNDI tree.

Problem: in Weblogic, the JNDI lookup is "appds" whilst in Tomcat, it seems that that I must provide the formal "java:comp/env/jdbc/appds". I'm afraid the Tomcat version is an implicit standard but unfortunately, I can't change Weblogic's config ... so that means we end up with two different spring config files (we're using spring 2.5) to facilitate the different environments.

Is there an elegant way to address this. Can I look JNDI names up directly in Tomcat? Can Spring take a name and look in both places? Google searches or suggestions would be great.

Answer 1

How about an evironment variable? Set developers machines with the tomcat name and production with the Weblogic name. You can even set your code to use a default one (WebLogic) in case the variable don't exist.

Answer 2

My application also had a similar problem and this is how I solved it:

1) WEB-INF/classes/application.properties contains the entry:

ds.jndi=java:comp/env/jdbc/tcds

2) On the WLS machine, I have an entry in the /etc/sysenv file:

ds.jndi=wlsds

3) I configured spring to lookup the JNDI vis the property ${ds.jndi}, using a PropertyPlaceholderConfigurer bean with classpath:application.properties and file:/etc/sysenv as locations. I also set the ignoreResourceNotFound to true so that developers need not have /etc/sysenv on their machines.

4) I run an integration test using Cargo+Jetty and I could not properly set up a JNDI environment there. So I have a fallback BasicDataSource configured too using the defaultObject property of JndiObjectFactoryBean.

Answer 3

JndiLocatorSupport has a property resourceRef. When setting this true, "java:comp/env/" prefix will be prepended automatically. So I believe it would be correct to differentiate this parameter when moving from Tomcat to Weblogic.

Answer 4

How are you referencing the resource in spring?

This is what we have for tomcat:

context:

<Resource name="jms/ConnectionFactory" auth="Container" type="org.apache.activemq.ActiveMQConnectionFactory" description="
JMS Connection Factory"
        factory="org.apache.activemq.jndi.JNDIReferenceFactory" brokerURL="tcp://localhost:61615" brokerName="StandaloneAc
tiveMQBroker"/>

spring:

    <beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:util="http://www.springframework.org/schema/util"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:jee="http://www.springframework.org/schema/jee"
       xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd"&gt;

<jee:jndi-lookup jndi-name="jms/ConnectionFactory" id="connectionFactory" resource-ref="true"
                         expected-type="javax.jms.ConnectionFactory" lookup-on-startup="false"/>

The jee namespace comes from:

http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.0.xsd

Answer 5

I've managed the trick with Tomcat and WebLogic using Spring. Here is a description of how it worked for me.