Wildfly load system properties

Question

I have an application deployed in wildfly packaged in a war file. I need to load some properties to be used in my java code from a xml file placed outside the war file under deployment directory.

deployments
 -- myapplication.war
 -- myproperties.xml

How can my java code access this property ? Please advise.

Thanks..

A full example using just CDI is given here: http://stackoverflow.com/questions/27953261/wildfly-reading-properties-from-configuration-directory/28996863#28996863 — Chris Ritchie, Mar 11 '15 at 20:49

zellus · Accepted Answer · 2014-12-09T19:56:01.713

In combination with CDI OWNER does the job really well.

Update

Inject Java Properties in Java EE Using CDI provides an introduction together with some sample code on github. As a next step you may delegate the properties part to OWNER.

Create an annotation type definition Config.java:

@Qualifier
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE, ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER})
public @interface Config {
}

Get the ConfigProducer.java in place:

@Produces
@Config
public Configuration produce(InjectionPoint ip) {
    if (config == null) {
        config = ConfigFactory.create(Configuration.class);        
    }
    return config;
}

The producer must be instantiated by itself or another bean with @Startup @Singleton annotations.

Setup your OWNER backed Configuration.java

@HotReload(type = HotReloadType.SYNC)
@LoadPolicy(LoadType.MERGE)
@Sources("file:${config.filepath}/config.properties")
public interface Configuration extends Config, Reloadable, Mutable, Accessible {

    @Key("server.http.port")
    int port();

    @Key("server.host.name")
    String hostname();

}

Inject and use the configuration in some bean:

@Stateless
public class SomeBean {

    @Inject
    @Config
    private Configuration config;

}

Not to forget the path configuration in wildfly's standalone.xml:

<system-properties>
        <property name="config.filepath" value="/your/path/"/>
</system-properties>

Abhinav Gupta · Answer 2 · 2015-05-08T05:21:23.213

If you are ok accessing all this property at System level, ie , System.getProperty("propertyName") , then best option is to add a custom module for this property file.

Below is example from my custom module I create to keep oracle driver jar :

I created on directory under wildfly modules as system\layers\base\com\oracle\ojdbc14\main

Now put all your jars in this directory. Add one module.xml file in same directory with entries of your jar files :

<module xmlns="urn:jboss:module:1.1" name="com.oracle.ojdbc14">

<resources>

<resource-root path="ojdbc14.jar"/>

<resource-root path="second jar"/>

<resource-root path="third jar "/>



</resources>

<dependencies>

</dependencies>

</module>

pay attention , I keep my directory structure consistent to my Name property in module. You can add as many jars as you need to this directory and add entry for resource-root path

Now to use this module , you can add entry in jboss-deployment-structure.xml in your applications META-INF , like :

<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.1">

    <deployment>

        <dependencies>

              ..

..

..

 

                <module name = "com.oracle.ojdbc14"/>

        </dependencies>

..

..

..

</jboss-deployment-structure>

ref @ https://developer.jboss.org/thread/257516

Hope this helps.

Wildfly load system properties

2 Answers2