in order to access global values stored in the file src/resources/settings.properties from web.xml on a JBoss EAP 7 Server, I implemented the following class from a similar Stack Overflow topic:
public class ConfigurationWebFilter implements ServletContextListener {
protected static final Properties properties = new Properties();
@Override
public void contextInitialized(final ServletContextEvent event){
try {
try (InputStream stream = new FileInputStream("/settings.properties")) {
properties.load(stream);
}
for (String prop : properties.stringPropertyNames())
{
if (System.getProperty(prop) == null)
{
System.setProperty(prop, properties.getProperty(prop));
}
}
} catch (IOException ex) {
logger.error("Failed loading settings from configuration file for web.xml", ex);
}
}
}
Then I added the according listener to web.xml:
<listener>
<listener-class>
com.product.util.ConfigurationWebFilter
</listener-class>
</listener>
The code gets called properly and I can verify by debugging that the system variables get set correctly. However, the properties of my web.xml do not seem to be replaced/interpreted. The following parameter does still evaluate to ${serverName}, even after restarting the server and/or republishing:
<filter>
<filter-name>CAS Authentication Filter</filter-name>
<filter-class>(...)</filter-class>
<init-param>
<param-name>serverName</param-name>
<param-value>${serverName}</param-value>
</init-param>
</filter>
All the other topics on this issue were of no use because no solution worked for me. How can I replace web.xml parameters by values stored in a properties file?
