| 提交 | 用户 | age | ||
| 0b055a | 1 | package com.hz.canal.starter.configuration; |
| R | 2 | |
| 3 | ||
| 4 | import com.hz.canal.starter.annotation.CanalListener; | |
| 5 | import com.hz.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; | |
| 14 | import org.springframework.context.ApplicationContext; | |
| 15 | import org.springframework.context.ApplicationContextAware; | |
| 16 | import org.springframework.core.MethodIntrospector; | |
| 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 | |
| 30 | BeanPostProcessor, SmartInitializingSingleton, BeanFactoryPostProcessor, ApplicationContextAware { | |
| 31 | ||
| 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; | |
| 38 | private ApplicationContext applicationContext; | |
| 39 | ||
| 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); | |
| 44 | // 只扫描类的方法，目前 CanalListener 只支持在方法上 | |
| 45 | Map<Method, CanalListener> annotatedMethods = MethodIntrospector.selectMethods(targetClass, | |
| 46 | (MethodIntrospector.MetadataLookup<CanalListener>) method -> findListenerAnnotations(method)); | |
| 47 | if (annotatedMethods.isEmpty()) { | |
| 48 | this.notAnnotatedClasses.add(bean.getClass()); | |
| 49 | } else { | |
| 50 | // 先加入到待注册里面 | |
| 51 | annotatedMethods.entrySet().stream() | |
| 52 | .filter(e -> e != null) | |
| 53 | .forEach(ele -> registrars.add(createRegistrar(bean, ele))); | |
| 54 | logger.info("Registered @CanalListener methods processed on bean:{} , Methods :{} ", beanName, | |
| 55 | annotatedMethods.keySet().stream().map(e -> e.getName()).collect(Collectors.toSet())); | |
| 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 | ||
| 77 | @Override | |
| 78 | public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { | |
| 79 | this.applicationContext = applicationContext; | |
| 80 | } | |
| 81 | ||
| 82 | private CanalListenerEndpointRegistrar createRegistrar(Object bean, Map.Entry<Method, CanalListener> entry) { | |
| 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 | } | |
| 88 | } | |
