Concepts

@Component
public class SpringBeanLifecycleDemo implements BeanNameAware, BeanFactoryAware, ApplicationContextAware,
        InitializingBean, BeanPostProcessor, DisposableBean {

    /* Start */

    public SpringBeanLifecycleDemo() {
        System.out.println("# 1. Instantiation of Bean");
    }

    private String javaVersion;

    @Value("${java.specification.version}")
    public void setJavaVersion(String javaVersion) {
        this.javaVersion = javaVersion;
        System.out.println("# 2. Population of properties/dependencies: Java Version is " + this.javaVersion);
    }

    @Override
    public void setBeanName(String name) {
        System.out.println("# 3. Call BeanNameAware#setBeanName(String name): " + name);
    }

    @Override
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        System.out.println(
                "# 4. Call BeanFactoryAware#setBeanFactory(BeanFactory beanFactory): " + beanFactory.getClass().getSimpleName());
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        System.out.println("# 5. Call ApplicationContextAware#setApplicationContext(ApplicationContext applicationContext): " +
                applicationContext.getClass().getSimpleName());
    }

    @PostConstruct
    public void postConstruct() {
        System.out.println("# 6. Call @PostConstruct annotated method");
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("# 7. Call InitializingBean#afterPropertiesSet()");
    }

    public void init() {
        System.out.println("# 8. Call custom init method (can be set with @Bean#initMethod)");
    }

    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        System.out.println(
                "# 9. Pre Initialization (call BeanPostProcessor#postProcessBeforeInitialization(Object bean, String beanName)): " +
                        beanName);

        return BeanPostProcessor.super.postProcessBeforeInitialization(bean, beanName);
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        System.out.println(
                "# 10. Post Initialization (call BeanPostProcessor#postProcessAfterInitialization(Object bean, String beanName)): " +
                        beanName);

        return BeanPostProcessor.super.postProcessAfterInitialization(bean, beanName);
    }

    /* Termination */

    @PreDestroy
    public void preDestroy() {
        System.out.println("# 1. Container shutdown");
        System.out.println("# 2. Call @PreDestroy annotated method");
    }

    @Override
    public void destroy() throws Exception {
        System.out.println("# 3. Call DisposableBean#destroy()");
    }

    public void cleanup() {
        System.out.println("# 4. Call custom destroy method (can be set with @Bean#destroyMethod)");
    }

}

@Configuration
public class SpringBeanLifecycleConfig {

    @Bean(initMethod = "init", destroyMethod = "cleanup")
    public SpringBeanLifecycleDemo springBeanLifecycleDemo() {
        return new SpringBeanLifecycleDemo();
    }

}