Spring FactoryBean as reference for PropertySourcesPlaceholderConfigurer

Question

Creating a FactoryBeany for loading the properties from the Zookeeper.

public class ZkPropertiesFactoryBean extends AbstractFactoryBean<Properties> {..}

While using XML config it is possible to refer the bean as follows

<bean id="zkProperties" class="test.ZkPropertiesFactoryBean"/>
<context:property-placeholder properties-ref="zkProperties"/>

I'm trying to convert XML config to Java config, using PropertySourcesPlaceholderConfigurer

    @Bean
    public  static PropertySourcesPlaceholderConfigurer loadProperties() throws Exception {
        PropertySourcesPlaceholderConfigurer prop = new PropertySourcesPlaceholderConfigurer();
        prop.setIgnoreUnresolvablePlaceholders(true);
        return prop;
    }

What is the equivalent of properties-ref? I'm not able to find any reference for doing the same.

Answer 1

You can use the setProperties of the PropertySourcesPlaceholderConfigurer and set it by using your AbstractFactoryBean.getObject() method:

Your configuration could look something like:

   @Configuration
   public class ZookeeperConfig {

        @Autowired
        private ZkPropertiesFactoryBean zkPropertiesFactoryBean;

        @Bean
        public  static PropertySourcesPlaceholderConfigurer loadProperties() throws Exception {
            PropertySourcesPlaceholderConfigurer prop = new PropertySourcesPlaceholderConfigurer();
            prop.setIgnoreUnresolvablePlaceholders(true);
            prop.setProperties(zkPropertiesFactoryBean.getObject());
            return prop;
        }
    }