How to merge PropertiesFactoryBean? - spring

Question

I have two spring profiles: development and production.
There should be a common properties file (placed in classpath:properties/common/*.properties) which will be overridden by the profile's properties file (placed in classpath:properties/development/*.properties.
This is my context config snippet to clarify my intention:
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.example.entities.*" />
<property name="hibernateProperties" ref="hibernateProperties" />
</bean>
<beans profile="development">
<context:property-placeholder location="classpath:properties/development/jdbc.properties" />
<bean id="hibernateProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="ignoreResourceNotFound" value="true" />
<property name="location" value="classpath:properties/development/hibernate.properties" />
</bean>
</beans>
<beans profile="production">
<context:property-placeholder location="classpath:properties/production/jdbc.properties" />
<bean id="hibernateProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="ignoreResourceNotFound" value="true" />
<property name="location" value="classpath:properties/production/hibernate.properties" />
</bean>
</beans>
Currently there's no common properties somewhere. How to merge a common properties file with the one in each profile for both jdbc.properties and hibernate.properties?

Answer 1

I've used JavaConfig for this:
#Configuration
#Profile("development")
public class DevelopmentConfig {
public #Bean String profile() {
return "development";
}
}
#Configuration
#Profile("production")
public class ProductionConfig {
public #Bean String profile() {
return "production";
}
}
public class PropertyUtils {
public static Properties getProperties(String profile, String filename) throws IOException {
Properties ret = new Properties();
ClassPathResource resource;
resource = new ClassPathResource("properties/common/" + filename + ".properties");
ret.putAll(PropertiesLoaderUtils.loadProperties(resource));
resource = new ClassPathResource("properties/" + profile + "/" + filename + ".properties");
if (resource.exists()) {
ret.putAll(PropertiesLoaderUtils.loadProperties(resource));
}
return ret;
}
}
#Configuration
public class MainConfig {
private #Autowired String profile;
// Here you can use: PropertyUtils.getProperties(profile, "jdbc"))
}

Answer 2

This should get you started
<bean id="allProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="singleton" value="true"/>
<property name="ignoreResourceNotFound" value="true"/>
<property name="locations">
<list>
<value>classpath*:default.properties</value>
<value>classpath*:overrides.properties</value>
<value>file:${APP_HOME}/**/*.properties</value>
</list>
</property>
</bean>