Refresh bean with spring cloud's @RefreshScope support

Refresh bean with spring boot's @RefreshScope support

Prerequisite

• Spring 4.3.x
• Spring Boot 1.4.x

Add spring cloud dependency

<dependency>
	<groupId>org.springframework.cloud</groupId>
	<artifactId>spring-cloud-context</artifactId>
	<version>1.0.2.RELEASE</version>
</dependency>
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-autoconfigure</artifactId>
	<version>1.4.1.RELEASE</version>
</dependency>

Mark the bean with @RefreshScope and @EnableAutoConfiguration

@Component("exampleBeanWithSpel")
@RefreshScope
@EnableAutoConfiguration // somewhere
public class ExampleBeanWithSpel {

	@Value("#{propertyGroup1['string_property_key']}")
	private String stringProperty;

	@Value("#{propertyGroup1['int_property_key']}")
	private int intProperty;

	private String computedValue;

	@PostConstruct
	private void init() {
		computedValue = stringProperty + intProperty;
	}

	public void someMethod() {
		System.out.println(String.format("My properties: [%s] - [%s] - [%s]", stringProperty, intProperty, computedValue));
	}

}

Register the bean observed

ExampleBeanWithSpel bean = context.getBean(ExampleBeanWithSpel.class);
GeneralConfigGroup cg1 = (GeneralConfigGroup) context.getBean("propertyGroup1");

cg1.register(new IObserver() {

	@Override
	public void notified(String data, String value) {
		context.getBean(RefreshScope.class).refresh("exampleBeanWithSpel");
	}
});

Example code

config-toolkit-demo