@ConfigurationProperties prefix not working

Question

.yml file

cassandra:     keyspaceApp:junit solr:     keyspaceApp:xyz 

Bean

@Component @ConfigurationProperties(prefix="cassandra") public class CassandraClientNew {    @Value("${keyspaceApp:@null}") private String keyspaceApp; 

Main method file

@EnableAutoConfiguration @ComponentScan @PropertySource("application.yml") public class CommonDataApplication {     public static void main(String[] args) {         ConfigurableApplicationContext context = new SpringApplicationBuilder(CommonDataApplication.class)                 .web(false).headless(true).main(CommonDataApplication.class).run(args);     } } 

TestCase

@RunWith(SpringJUnit4ClassRunner.class) @SpringApplicationConfiguration(classes = CommonDataApplication.class) @IntegrationTest @EnableConfigurationProperties public class CassandraClientTest {      @Autowired     CassandraClientNew cassandraClientNew;      @Test     public void test(){         cassandraClientNew.getSession();         System.out.println(" **** done ****");     } } 

Instead of setting junit as the keyspaceApp it sets xyz.

Looks like prefix="cassandra" not working

Answer 1

It looks like you are trying to use Spring Boot Typesafe Configuration Properties feature.

So in order to have it working correctly, you have to add a few changes to your code:

First of all, your CommonDataApplication class should have @EnableConfigurationProperties annotation e.g.

@EnableAutoConfiguration @ComponentScan @PropertySource("application.yml") @EnableConfigurationProperties public class CommonDataApplication {      public static void main(String[] args) {         // ...     } } 

I do not believe you need @PropertySource("application.yml") annotation as application.yml (as well as application.properties and application.xml) is a default configuration file used by Spring Boot.

Your CassandraClientNew class does not need to have @Value annotation prefixing keyspaceApp property. And your keyspaceApp has to have a setter method.

@Component @ConfigurationProperties(prefix="cassandra") public class CassandraClientNew {     private String keyspaceApp;     public void setKeyspaceApp(final String keyspaceApp) {        this.keyspaceApp = keyspaceApp;    } } 

BTW, if you are using List's or Sets and you initialise collections (e.g. List<String> values = new ArrayList<>();), then only getter is required. If a collection is not initialised then you need to provide a setter method too (otherwise an exception will be thrown).

I hope that will help.