This project was not touched for 2 years. Following code is written in spring-security.xml 

```
  <b:bean id="mappings" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <b:property name="location">
            <b:value>classpath:/application.properties</b:value>
        </b:property>
  </b:bean> 
  <b:bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <b:property name="driverClassName" value="com.mysql.jdbc.Driver" /> 
        <b:property name="url" value="${SPRING_DATASOURCE_URL}" />
        <b:property name="username" value="${SPRING_DATASOURCE_USERNAME}" />
        <b:property name="password" value="${SPRING_DATASOURCE_PASSWORD}" />
  </b:bean>

```

I checked 
`src/main/resources`, 
entire code base, 
entire system (macOS level search) and I couldn't find application.properties. 

What I know for sure is, when the application is run locally(in my laptop) it uses `SPRING_DATASOURCE_URL`, `USERNAME` and `PASSWORD` to connect to remote AWS db.

Question: How can I debug and find out the location of the file?

PS: I did try file search etc. for search string 'SPRING\_DATASOURCE\_URL'