Spring dynamic bean registration example sharing

Time:2020-10-25

1. In some special scenarios, it is necessary to register beans with spring dynamically
2. Spring version 2.5.6

Copy codeThe code is as follows:
public class ServiceServiceImpl implements ServiceService, ApplicationContextAware {

 @Override
 public void setApplicationContext(org.springframework.context.ApplicationContext applicationContext)
   throws BeansException {
  this.context = applicationContext;
 }

 public void addBeanService(Service service) throws BVSException {
  if (!context.containsBean(service.getServiceName())) {
   Class<?> serviceClass = getServiceClass(service.getClassName());
   BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder.genericBeanDefinition(serviceClass);
   beanDefinitionBuilder.addPropertyValue(“servicename”, service.getServiceName());
   registerBean(service.getServiceName(), beanDefinitionBuilder.getRawBeanDefinition());
  }

 }

 /**
* @ desc registers beans with spring container
  * @param beanName
  * @param beanDefinition
  */
 private void registerBean(String beanName, BeanDefinition beanDefinition) {
  ConfigurableApplicationContext configurableApplicationContext = (ConfigurableApplicationContext) context;
  BeanDefinitionRegistry beanDefinitonRegistry = (BeanDefinitionRegistry) configurableApplicationContext
    .getBeanFactory();
  beanDefinitonRegistry.registerBeanDefinition(beanName, beanDefinition);
 }

 /**
* @ desc find class by class name
  * @param className
  * @return
  * @throws BVSException
  */
 private Class<?> getServiceClass(String className) throws BVSException {
  try {
   return Thread.currentThread().getContextClassLoader().loadClass(className);
  } catch (ClassNotFoundException e) {
   log.error(“not found service class:” + className, e);
   throw new BVSException(“not found service class:” + className, e);
  }
 }
}

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