| 提交 | 用户 | age | ||
| de8c2b | 1 | package com.duxinglangzi.canal.starter.configuration; |
| D | 2 | |
| 3 | ||
| 4 | import com.duxinglangzi.canal.starter.annotation.CanalListener; | |
| 5 | import com.duxinglangzi.canal.starter.factory.TransponderContainerFactory; | |
| 6 | import org.slf4j.Logger; | |
| 7 | import org.slf4j.LoggerFactory; | |
| 8 | import org.springframework.aop.support.AopUtils; | |
| 9 | import org.springframework.beans.BeansException; | |
| 10 | import org.springframework.beans.factory.SmartInitializingSingleton; | |
| 11 | import org.springframework.beans.factory.config.BeanFactoryPostProcessor; | |
| 12 | import org.springframework.beans.factory.config.BeanPostProcessor; | |
| 13 | import org.springframework.beans.factory.config.ConfigurableListableBeanFactory; | |
| a87aa7 | 14 | import org.springframework.context.ApplicationContext; |
| D | 15 | import org.springframework.context.ApplicationContextAware; |
| de8c2b | 16 | import org.springframework.core.MethodIntrospector; |
| D | 17 | import org.springframework.core.annotation.AnnotatedElementUtils; |
| 18 | ||
| 19 | import java.lang.reflect.Method; | |
| 20 | import java.util.Collections; | |
| 21 | import java.util.Map; | |
| 22 | import java.util.Set; | |
| 23 | import java.util.concurrent.ConcurrentHashMap; | |
| 24 | import java.util.stream.Collectors; | |
| 25 | ||
| 26 | /** | |
| 27 | * @author wuqiong 2022/4/11 | |
| 28 | */ | |
| 29 | public class CanalListenerAnnotationBeanPostProcessor implements | |
| a87aa7 | 30 | BeanPostProcessor, SmartInitializingSingleton, BeanFactoryPostProcessor, ApplicationContextAware { |
| de8c2b | 31 | |
| D | 32 | private static final Logger logger = LoggerFactory.getLogger(CanalListenerAnnotationBeanPostProcessor.class); |
| 33 | ||
| 34 | private final Set<Class<?>> notAnnotatedClasses = Collections.newSetFromMap(new ConcurrentHashMap<>(256)); | |
| 35 | private Set<CanalListenerEndpointRegistrar> registrars = Collections.newSetFromMap(new ConcurrentHashMap<>()); | |
| 36 | private ConfigurableListableBeanFactory configurableListableBeanFactory; | |
| 37 | private CanalAutoConfigurationProperties canalAutoConfigurationProperties; | |
| a87aa7 | 38 | private ApplicationContext applicationContext; |
| de8c2b | 39 | |
| D | 40 | @Override |
| 41 | public Object postProcessAfterInitialization(final Object bean, final String beanName) throws BeansException { | |
| 42 | if (notAnnotatedClasses.contains(bean.getClass())) return bean; | |
| 43 | Class<?> targetClass = AopUtils.getTargetClass(bean); | |
| 627420 | 44 | // 只扫描类的方法，目前 CanalListener 只支持在方法上 |
| de8c2b | 45 | Map<Method, CanalListener> annotatedMethods = MethodIntrospector.selectMethods(targetClass, |
| D | 46 | (MethodIntrospector.MetadataLookup<CanalListener>) method -> findListenerAnnotations(method)); |
| 47 | if (annotatedMethods.isEmpty()) { | |
| 48 | this.notAnnotatedClasses.add(bean.getClass()); | |
| 49 | } else { | |
| 627420 | 50 | // 先加入到待注册里面 |
| de8c2b | 51 | annotatedMethods.entrySet().stream() |
| D | 52 | .filter(e -> e != null) |
| a87aa7 | 53 | .forEach(ele -> registrars.add(createRegistrar(bean, ele))); |
| 627420 | 54 | logger.info("Registered @CanalListener methods processed on bean:{} , Methods :{} ", beanName, |
| de8c2b | 55 | annotatedMethods.keySet().stream().map(e -> e.getName()).collect(Collectors.toSet())); |
| D | 56 | } |
| 57 | return bean; | |
| 58 | } | |
| 59 | ||
| 60 | ||
| 61 | private CanalListener findListenerAnnotations(Method method) { | |
| 62 | return AnnotatedElementUtils.findMergedAnnotation(method, CanalListener.class); | |
| 63 | } | |
| 64 | ||
| 65 | ||
| 66 | @Override | |
| 67 | public void afterSingletonsInstantiated() { | |
| 68 | canalAutoConfigurationProperties = configurableListableBeanFactory.getBean(CanalAutoConfigurationProperties.class); | |
| 69 | TransponderContainerFactory.registerListenerContainer(configurableListableBeanFactory, canalAutoConfigurationProperties, registrars); | |
| 70 | } | |
| 71 | ||
| 72 | @Override | |
| 73 | public void postProcessBeanFactory(ConfigurableListableBeanFactory configurableListableBeanFactory) throws BeansException { | |
| 74 | this.configurableListableBeanFactory = configurableListableBeanFactory; | |
| 75 | } | |
| 76 | ||
| a87aa7 | 77 | @Override |
| D | 78 | public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { |
| 79 | this.applicationContext = applicationContext; | |
| 80 | } | |
| de8c2b | 81 | |
| a87aa7 | 82 | private CanalListenerEndpointRegistrar createRegistrar(Object bean, Map.Entry<Method, CanalListener> entry) { |
| D | 83 | return new CanalListenerEndpointRegistrar(bean, entry.getKey(), |
| 84 | applicationContext.getEnvironment().resolvePlaceholders(entry.getValue().destination()), | |
| 85 | applicationContext.getEnvironment().resolvePlaceholders(entry.getValue().database()), | |
| 86 | entry.getValue().table(), entry.getValue().eventType()); | |
| 87 | } | |
| de8c2b | 88 | } |
