How to externalize configuration in spring?

Question

I am attempting to externalize the configurations using spring, but cannot get it to work properly..

Here is what I did so far:

create a property file inside the war file (src/test/resources/) for each environment. For example: nonprod-key.properties & prod-key.properties with content like so:

 key.name=NameOfPrivateKey.pfx key.password=JustAPasswordForPrivateKey

Then in my jboss-cxf.xml, I would like to read the above value as follows:

 <import resource="#{systemProperties['environment']}-key.properties" /> <http:conduit name="*.http-conduit"> <http:tlsClientParameters secureSocketProtocol="SSL"> <sec:keyManagers keyPassword="${key.password}"> <sec:keyStore type="PKCS12" password="${key.password}" resource="${key.name}" /> </sec:keyManagers> ... ... ... </http:tlsClientParameters> </http:conduit>

And then in eclipse, run configurations --> Arguments --> VM Arguments

 -Denvironment=nonprod

Unfortunately, the above does not work. :(

I am getting this error message:

 class path resource [#{systemProperties['environment']}-key.properties] cannot be opened because it does not exist

I was attempting to use the suggestion from here : http://forum.springsource.org/showthread.php?98988-Access-external-properties-file-from-SPRING-context-file&p=332278#post332278

But cannot seem to get it to work. What am I doing wrong? Could someone please give an example/sample of how best to do accomplish this.

Thank you.

-SGB

Obviously that template cannot be converted to the proper resource name. Consider using profiles instead of your method. — Sotirios Delimanolis
– Sotirios Delimanolis, Commented Sep 9, 2013 at 19:39
hmm.. do you have an sample code that I can use? It sounded like it should be possible from this link: forum.springsource.org/…? — SGB
– SGB, Commented Sep 9, 2013 at 21:07
I would imagine you need a PropertyPlaceholderConfigurer for that to work. Consider this — Sotirios Delimanolis
– Sotirios Delimanolis, Commented Sep 9, 2013 at 21:09

SGB · Accepted Answer · 2013-09-13 21:07:52Z

I believe one needs to be on Spring 3.1.x to use profiles. We are not ... yet.

Anyways, the final solution that seems to work for us is to use :

<context:property-placeholder location="classpath:${environment}-key.properties"/>

instead of

<import resource="#{systemProperties['environment']}-key.properties" />

Everything else is same as listed in my original post (question).

Hope someone finds this useful.

SGB

Community · Accepted Answer · 2017-05-23 12:24:56Z

You can use Property Place Holder. If you want a flexible configuration, eg. a default configuration stored in your war which can be overrided by an external configuration, you can use directly the PropertyPlaceholderConfigurer bean like :

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" p:ignoreResourceNotFound="true"> <property name="locations"> <array> <bean class="org.springframework.core.io.ClassPathResource" c:path="${environment}-key.properties"/> <bean class="org.springframework.core.io.FileSystemResource" c:path="relative/path"/> </array> </property> </bean>

path attributes can used SPEL for example to reference property or system env variable.

Have a look to this article and this how to read System environment variable in Spring applicationContext

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