Conditional Logic around context element

[monster910]

I have been looking around and have not found much on conditional logic I can place into the context xml that would optionally add load-time-weaver.

For example, in WebSphere I want the line commented out

<!-- uncomment the following line to run in Tomcat locally
<context:load-time-weaver/>
-->

Yet, in Tomcat (i.e. our local development), I want the line active

<context:load-time-weaver/>


Is there a means to write something like

<if condition=${tomcatServer}>
<context:load-time-weaver/>
</if>

This is the ONLY line change in the entire config. Note: Please assume I would write something that would set the ${tomcatServer} variable



Any suggestions?

[ptalakanti]

I have solved a similar problem for deployment (dev or prod), I created two config files (appContextDS_dev.xml, appContextDS_prod.xml). I have my primary application context file (applicationContext.xml)

In applicationContext.xml I import the (dev or prod) some thing like this

<import resource="appContextDS_${server_env}.xml"/>

[monster910]

Hey ptalakanti

Thanks for the reply. I too have approached the the problem similar to you. I read the "env" via JNDI from the server directly. By doing so, I can build one ear for promotion with a checksum and signature and promote throughout the environments. The code required some extensions but essentially the web.xml looks like

...
<context-param>

<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext_env.xml</param-value>

</context-param>
<context-param>

<param-name>contextConfigEnv</param-name>
<param-value>ServerEnv</param-value>

</context-param>
<listener>

<listener-class>com.xxx.util.spring.EnvContextLoaderListener </listener-class>

</listener>
...
<resource-ref>

<description>The Server Environment Identifier</description>
<res-ref-name>ServerEnv</res-ref-name>
<res-type>java.lang.String</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>

</resource-ref>

Note: You cannot put EL (i.e. $env in the web.xml) so this just does a string substitution to become /WEB-INF/applicationContext_dev.xml, /WEB-INF/applicationContext_test.xml, etc.

I take the same approach in non-web systems. However, see my next post about using profiles (new to Spring) to determine the configuration based on server target (i.e. Jetty or Tomcat).

Kevin Clark

[monster910]

My original problem was how to configure Spring to use the

<context:load-time-weaver/>

directive when using Tomcat and not to use it when running in say WebSphere or Jetty or WebLogic.

Here is the best solution I found. Please comment

1. Create two spring configurations.

projectname-config-weaver.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"

xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns: p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
xmlns:sec="http://www.springframework.org/schema/security"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schem...-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd"
profile="tomcat">
<context:load-time-weaver/>

</beans:beans>

projectname-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"

xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns: p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
xmlns:sec="http://www.springframework.org/schema/security"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schem...-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schem...ontext-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd"
default-autowire="byName">
...

Note: NO PROFILE, so this is active on all servers

In my case the web.xml has

<context-param>

<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/application-security.xml, /WEB-INF/projectname-config.xml, /WEB-INF/projectname-config-weaver.xml</param-value>

</context-param>

In the tomcat VM args I add

-Dspring.profiles.active=tomcat