support nacos config annotation (#3856)

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigAutoConfiguration.java

@@ -16,6 +16,7 @@
 
 package com.alibaba.cloud.nacos;
 
+import com.alibaba.cloud.nacos.annotation.NacosAnnotationProcessor;
 import com.alibaba.cloud.nacos.refresh.NacosContextRefresher;
 import com.alibaba.cloud.nacos.refresh.NacosRefreshHistory;
 import com.alibaba.cloud.nacos.refresh.NacosRefreshProperties;
@@ -68,8 +69,12 @@ public class NacosConfigAutoConfiguration {
 	}
 
 	@Bean
-	public NacosContextRefresher nacosContextRefresher(
-			NacosConfigManager nacosConfigManager,
+	public NacosAnnotationProcessor nacosAnnotationProcessor() {
+		return new NacosAnnotationProcessor();
+	}
+
+	@Bean
+	public NacosContextRefresher nacosContextRefresher(NacosConfigManager nacosConfigManager,
 			NacosRefreshHistory nacosRefreshHistory) {
 		// Consider that it is not necessary to be compatible with the previous
 		// configuration

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/AbstractConfigChangeListener.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.util.Map;
+
+import com.alibaba.nacos.api.config.ConfigChangeEvent;
+import com.alibaba.nacos.api.config.ConfigChangeItem;
+import com.alibaba.nacos.api.config.listener.AbstractSharedListener;
+import com.alibaba.nacos.client.config.impl.ConfigChangeHandler;
+
+public abstract class AbstractConfigChangeListener extends AbstractSharedListener implements TargetRefreshable {
+
+	String lastContent;
+
+	Object target;
+
+	@Override
+	public Object getTarget() {
+		return target;
+	}
+
+	@Override
+	public void setTarget(Object target) {
+		this.target = target;
+	}
+
+	public AbstractConfigChangeListener(Object target) {
+		this.target = target;
+	}
+
+	protected void setLastContent(String lastContent) {
+		this.lastContent = lastContent;
+	}
+
+	@Override
+	public void innerReceive(String dataId, String group, String configInfo) {
+
+		Map<String, ConfigChangeItem> data = null;
+		try {
+			data = ConfigChangeHandler.getInstance().parseChangeData(lastContent, configInfo, type(dataId));
+		}
+		catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+		ConfigChangeEvent event = new ConfigChangeEvent(data);
+		receiveConfigChange(event);
+		lastContent = configInfo;
+	}
+
+	private String type(String dataId) {
+		if (dataId.endsWith(".yml") || dataId.endsWith(".yaml")) {
+			return "yaml";
+		}
+		return "properties";
+	}
+
+	abstract void receiveConfigChange(ConfigChangeEvent event);
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/CustomDateDeserializer.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.databind.JsonNode;
+
+public class CustomDateDeserializer extends JsonDeserializer<Date> {
+
+	private static final long serialVersionUID = 1L;
+
+	private SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+
+	public CustomDateDeserializer() {
+		super();
+	}
+
+	@Override
+	public Date deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
+		JsonNode node = jsonParser.getCodec().readTree(jsonParser);
+		String date = node.textValue();
+		try {
+			return dateFormat.parse(date);
+		}
+		catch (Exception e) {
+			throw new IOException("Invalid date format");
+		}
+	}
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/JsonUtils.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.io.IOException;
+import java.lang.reflect.Type;
+
+import com.alibaba.nacos.api.exception.runtime.NacosDeserializationException;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.type.TypeFactory;
+
+final class JsonUtils {
+
+	private JsonUtils() {
+	}
+
+	static ObjectMapper mapper = new ObjectMapper();
+
+	static {
+		mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
+		mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+	}
+
+	/**
+	 * Json string deserialize to Object.
+	 *
+	 * @param json json string
+	 * @param cls  class of object
+	 * @param <T>  General type
+	 * @return object
+	 * @throws NacosDeserializationException if deserialize failed
+	 */
+	public static <T> T toObj(String json, Class<T> cls) {
+		try {
+			return mapper.readValue(json, cls);
+		}
+		catch (IOException e) {
+			throw new NacosDeserializationException(cls, e);
+		}
+	}
+
+	public static <T> T toObj(String json, Type type) {
+		try {
+			return mapper.readValue(json, TypeFactory.defaultInstance().constructType(type));
+		}
+		catch (IOException e) {
+			throw new NacosDeserializationException(type, e);
+		}
+	}
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/NacosAnnotationProcessor.java

@@ -0,0 +1,617 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicReference;
+
+import com.alibaba.cloud.nacos.NacosConfigManager;
+import com.alibaba.nacos.api.config.ConfigChangeEvent;
+import com.alibaba.nacos.api.config.ConfigChangeItem;
+import com.alibaba.nacos.api.config.listener.AbstractListener;
+import com.alibaba.nacos.client.config.common.GroupKey;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.config.BeanPostProcessor;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+import org.springframework.core.PriorityOrdered;
+import org.springframework.core.annotation.AnnotationUtils;
+import org.springframework.util.ReflectionUtils;
+
+public class NacosAnnotationProcessor implements BeanPostProcessor, PriorityOrdered, ApplicationContextAware {
+
+	private NacosConfigManager nacosConfigManager;
+
+	private ApplicationContext applicationContext;
+
+	private final static Logger log = LoggerFactory
+			.getLogger(NacosAnnotationProcessor.class);
+
+	@Override
+	public int getOrder() {
+		return 0;
+	}
+
+	private Map<String, TargetRefreshable> targetListenerMap = new ConcurrentHashMap<>();
+	private Map<String, AtomicReference<String>> groupKeyCache = new ConcurrentHashMap<>();
+
+	private String getGroupKeyContent(String dataId, String group) throws Exception {
+		if (groupKeyCache.containsKey(GroupKey.getKey(dataId, group))) {
+			return groupKeyCache.get(GroupKey.getKey(dataId, group)).get();
+		}
+		synchronized (this) {
+			if (!groupKeyCache.containsKey(GroupKey.getKey(dataId, group))) {
+				String content = nacosConfigManager.getConfigService().getConfig(dataId, group, 5000);
+				groupKeyCache.put(GroupKey.getKey(dataId, group), new AtomicReference<>(content));
+
+				log.info("[Nacos Config] Listening config for annotation: dataId={}, group={}", dataId,
+						group);
+				nacosConfigManager.getConfigService().addListener(dataId, group, new AbstractListener() {
+					@Override
+					public void receiveConfigInfo(String s) {
+						groupKeyCache.get(GroupKey.getKey(dataId, group)).set(s);
+					}
+
+					@Override
+					public String toString() {
+						return String.format("sca nacos config annotation cache config listener");
+					}
+				});
+
+			}
+
+			return groupKeyCache.get(GroupKey.getKey(dataId, group)).get();
+		}
+
+	}
+
+	@Override
+	public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
+		return BeanPostProcessor.super.postProcessBeforeInitialization(bean, beanName);
+	}
+
+	@Override
+	public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
+		BeanPostProcessor.super.postProcessAfterInitialization(bean, beanName);
+		Class clazz = bean.getClass();
+		for (Field field : getBeanFields(clazz)) {
+			handleFiledAnnotation(bean, beanName, field);
+		}
+		for (Method method : getBeanMethods(clazz)) {
+			handleMethodAnnotation(bean, beanName, method);
+		}
+		return bean;
+	}
+
+	private List<Field> getBeanFields(Class clazz) {
+		List<Field> res = new ArrayList<>();
+		ReflectionUtils.doWithFields(clazz, field -> res.add(field));
+		return res;
+	}
+
+	private List<Method> getBeanMethods(Class clazz) {
+		List<Method> res = new ArrayList<>();
+		ReflectionUtils.doWithMethods(clazz, method -> res.add(method));
+		return res;
+	}
+
+	private void handleFiledAnnotation(Object bean, String beanName, Field field) {
+		NacosConfig annotation = AnnotationUtils.getAnnotation(field, NacosConfig.class);
+		if (annotation != null) {
+			handleFiledNacosConfigAnnotation(annotation, beanName, bean, field);
+		}
+	}
+
+	private void handleMethodNacosConfigKeysChangeListener(NacosConfigKeysListener annotation, String beanName, Object bean,
+			Method method) {
+		String dataId = annotation.dataId();
+		String group = annotation.group();
+		try {
+			Class<?>[] parameterTypes = method.getParameterTypes();
+			if (parameterTypes.length != 1 || !ConfigChangeEvent.class.isAssignableFrom(parameterTypes[0])) {
+				throw new RuntimeException(
+						"NacosConfigKeysChangeListener must be marked as a single parameter with ConfigChangeEvent");
+			}
+
+			String refreshTargetKey = beanName + "#method#" + methodSignature(method);
+			TargetRefreshable currentTarget = targetListenerMap.get(refreshTargetKey);
+			if (currentTarget != null) {
+				log.info("[Nacos Config] reset {} listener from  {} to {} ", refreshTargetKey,
+						currentTarget.getTarget(), bean);
+				targetListenerMap.get(refreshTargetKey).setTarget(bean);
+				return;
+			}
+
+			log.info("[Nacos Config] register {} listener on {} ", refreshTargetKey,
+					bean);
+			// annotation on string.
+			NacosPropertiesKeyListener nacosPropertiesKeyListener = new NacosPropertiesKeyListener(bean, wrapArrayToSet(annotation.interestedKeys()),
+					wrapArrayToSet(annotation.interestedKeyPrefixes())) {
+
+				@Override
+				public void configChanged(ConfigChangeEvent event) {
+					ReflectionUtils.invokeMethod(method, this.getTarget(), event);
+				}
+
+				@Override
+				public String toString() {
+					return String.format("sca nacos config listener on bean method %s", bean + "#" + methodSignature(method));
+				}
+			};
+			nacosPropertiesKeyListener.setLastContent(getGroupKeyContent(dataId, group));
+			nacosConfigManager.getConfigService().addListener(dataId, group,
+					nacosPropertiesKeyListener);
+			targetListenerMap.put(refreshTargetKey, nacosPropertiesKeyListener);
+		}
+		catch (Throwable e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	private Set<String> wrapArrayToSet(String... arrayKeys) {
+		return new HashSet<>(Arrays.asList(arrayKeys));
+	}
+
+	private String methodSignature(Method method) {
+		StringBuilder signature = new StringBuilder(method.getName() + "(");
+		Class<?>[] parameterTypes = method.getParameterTypes();
+		for (int i = 0; i < parameterTypes.length; i++) {
+			signature.append(parameterTypes[i].getSimpleName());
+			if (i < parameterTypes.length - 1) {
+				signature.append(", ");
+			}
+		}
+
+		signature.append(")");
+		return signature.toString();
+	}
+
+	private void handleMethodNacosConfigListener(NacosConfigListener annotation, String beanName, Object bean, Method method) {
+		String dataId = annotation.dataId();
+		String group = annotation.group();
+		String key = annotation.key();
+		try {
+			Type[] parameterTypes = method.getGenericParameterTypes();
+			if (parameterTypes.length != 1) {
+				throw new RuntimeException(
+						"@NacosConfigListener  must be over a method with  a single parameter");
+			}
+
+			String configInfo = getGroupKeyContent(dataId, group);
+			String refreshTargetKey = beanName + "#method#" + methodSignature(method);
+			TargetRefreshable currentTarget = targetListenerMap.get(refreshTargetKey);
+			if (currentTarget != null) {
+				log.info("[Nacos Config] reset {} listener from  {} to {} ", refreshTargetKey,
+						currentTarget.getTarget(), bean);
+				targetListenerMap.get(refreshTargetKey).setTarget(bean);
+				return;
+			}
+
+			log.info("[Nacos Config] register {} listener on {} ", refreshTargetKey,
+					bean);
+
+			TargetRefreshable listener = null;
+			if (org.springframework.util.StringUtils.hasText(key)) {
+				listener = new NacosPropertiesKeyListener(bean, wrapArrayToSet(key)) {
+
+					@Override
+					public void configChanged(ConfigChangeEvent event) {
+						try {
+							ConfigChangeItem changeItem = event.getChangeItem(key);
+							String newConfig = changeItem == null ? null : changeItem.getNewValue();
+
+							if (org.springframework.util.StringUtils.hasText(newConfig)) {
+								if (invokePrimitiveMethod(method, getTarget(), newConfig)) {
+									return;
+								}
+
+								Object targetObject = convertContentToTargetType(newConfig, parameterTypes[0]);
+								ReflectionUtils.invokeMethod(method, getTarget(), targetObject);
+							}
+						}
+						catch (Exception e) {
+							throw new RuntimeException(e);
+						}
+					}
+
+					@Override
+					public String toString() {
+						return String.format("[spring cloud alibaba nacos config key listener , key %s , target %s ] ", key, bean + "#" + methodSignature(method));
+					}
+				};
+				((AbstractConfigChangeListener) listener).fillContext(dataId, group);
+				if (!annotation.initNotify()) {
+					((AbstractConfigChangeListener) listener).setLastContent(configInfo);
+				}
+			}
+			else {
+				listener = new NacosConfigRefreshableListener(bean) {
+
+					@Override
+					public void receiveConfigInfo(String configInfo) {
+						if (org.springframework.util.StringUtils.hasText(configInfo)) {
+							try {
+								if (invokePrimitiveMethod(method, getTarget(), configInfo)) {
+									return;
+								}
+								Object targetObject = convertContentToTargetType(configInfo, parameterTypes[0]);
+								ReflectionUtils.invokeMethod(method, getTarget(), targetObject);
+							}
+							catch (Exception e) {
+								throw new RuntimeException(e);
+							}
+
+						}
+					}
+
+					@Override
+					public String toString() {
+						return String.format("[spring cloud alibaba nacos config  listener ,  target %s ] ", bean + "#" + methodSignature(method));
+					}
+				};
+			}
+
+			nacosConfigManager.getConfigService().addListener(dataId, group, listener);
+			targetListenerMap.put(refreshTargetKey, listener);
+			if (annotation.initNotify() && org.springframework.util.StringUtils.hasText(configInfo)) {
+				try {
+					log.info("[Nacos Config] init notify listener of {}  on {} start...", refreshTargetKey,
+							bean);
+					listener.receiveConfigInfo(configInfo);
+					log.info("[Nacos Config] init notify listener of {}  on {} finished ", refreshTargetKey,
+							bean);
+				}
+				catch (Throwable throwable) {
+					log.warn("[Nacos Config] init notify listener error", throwable);
+					throw throwable;
+				}
+			}
+		}
+		catch (Throwable e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+
+	Object convertContentToTargetType(String rawContent, Type type) {
+
+		if (String.class.getCanonicalName().equals(type.getTypeName())) {
+			return rawContent;
+		}
+
+		if (Properties.class.getCanonicalName().equals(type.getTypeName())) {
+			//properties and yaml config to properties.
+			Properties properties = new Properties();
+			try {
+				if (org.springframework.util.StringUtils.hasText(rawContent)) {
+					properties = PropertiesUtils.convertToProperties(rawContent);
+				}
+			}
+			catch (Throwable throwable) {
+				throw new RuntimeException(throwable);
+			}
+			return properties;
+		}
+		return ObjectUtils.convertToObject(rawContent, type);
+	}
+
+	private void handleFiledNacosConfigAnnotation(NacosConfig annotation, String beanName, Object bean, Field field) {
+		String dataId = annotation.dataId();
+		String group = annotation.group();
+		String key = annotation.key();
+		try {
+			ReflectionUtils.makeAccessible(field);
+			handleFiledNacosConfigAnnotationInner(dataId, group, key, beanName, bean, field, annotation.defaultValue());
+		}
+		catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	private void handleFiledNacosConfigAnnotationInner(String dataId, String group, String key, String beanName, Object bean,
+			Field field, String defaultValue) {
+		try {
+			String config = getDestContent(getGroupKeyContent(dataId, group), key);
+			if (!org.springframework.util.StringUtils.hasText(config)) {
+				config = defaultValue;
+			}
+
+			//primitive type
+			if (handPrimitiveFiled(field, dataId, group, config, key, defaultValue, beanName, bean)) {
+				return;
+			}
+
+			//for other type.
+			if (org.springframework.util.StringUtils.hasText(config)) {
+				Object targetObject = convertContentToTargetType(config, field.getGenericType());
+				//yaml and json to object
+				ReflectionUtils.setField(field, bean, targetObject);
+			}
+
+			String refreshTargetKey = beanName + "#filed#" + field.getName();
+			TargetRefreshable currentTarget = targetListenerMap.get(refreshTargetKey);
+			if (currentTarget != null) {
+				log.info("[Nacos Config] reset {} listener from  {} to {} ", refreshTargetKey,
+						currentTarget.getTarget(), bean);
+				targetListenerMap.get(refreshTargetKey).setTarget(bean);
+				return;
+			}
+
+			log.info("[Nacos Config] register {} listener on {} ", refreshTargetKey,
+					bean);
+			TargetRefreshable listener = null;
+			if (org.springframework.util.StringUtils.hasText(key)) {
+				listener = new NacosPropertiesKeyListener(bean, wrapArrayToSet(key)) {
+
+					@Override
+					public void configChanged(ConfigChangeEvent event) {
+						try {
+							ConfigChangeItem changeItem = event.getChangeItem(key);
+							String newConfig = changeItem == null ? null : changeItem.getNewValue();
+							if (!org.springframework.util.StringUtils.hasText(newConfig)) {
+								newConfig = defaultValue;
+							}
+							if (org.springframework.util.StringUtils.hasText(newConfig)) {
+								Object targetObject = convertContentToTargetType(newConfig, field.getGenericType());
+								ReflectionUtils.setField(field, getTarget(), targetObject);
+							}
+						}
+						catch (Exception e) {
+							throw new RuntimeException(e);
+						}
+					}
+
+					@Override
+					public String toString() {
+						return String.format("[spring cloud alibaba nacos config key listener , key %s , target %s ] ", key, bean + "#" + field.getName());
+					}
+				};
+			}
+			else {
+				listener = new NacosConfigRefreshableListener(bean) {
+
+					@Override
+					public void receiveConfigInfo(String configInfo) {
+						if (!org.springframework.util.StringUtils.hasText(configInfo)) {
+							configInfo = defaultValue;
+						}
+						if (org.springframework.util.StringUtils.hasText(configInfo)) {
+							Object targetObject = convertContentToTargetType(configInfo, field.getGenericType());
+							ReflectionUtils.setField(field, getTarget(), targetObject);
+						}
+					}
+
+					@Override
+					public String toString() {
+						return String.format("[spring cloud alibaba nacos config key listener , key %s , target %s ] ", key, bean + "#" + field.getName());
+					}
+				};
+			}
+
+			nacosConfigManager.getConfigService()
+					.addListener(dataId, group, listener);
+			targetListenerMap.put(refreshTargetKey, listener);
+
+		}
+		catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	private boolean handPrimitiveFiled(Field field, String dataId, String group, String config, String key, String defaultValue, String beanName, Object bean) throws Exception {
+		if (field.getType().isPrimitive()) {
+
+			if (org.springframework.util.StringUtils.hasText(config)) {
+				try {
+					setPrimitiveFiled(field, bean, config);
+				}
+				catch (Throwable throwable) {
+					throw new RuntimeException(throwable);
+				}
+			}
+
+			String refreshTargetKey = beanName + "#filed#" + field.getName();
+			TargetRefreshable currentTarget = targetListenerMap.get(refreshTargetKey);
+			if (currentTarget != null) {
+				log.info("[Nacos Config] reset {} listener from  {} to {} ", refreshTargetKey,
+						currentTarget.getTarget(), bean);
+				targetListenerMap.get(refreshTargetKey).setTarget(bean);
+				return true;
+			}
+
+			log.info("[Nacos Config] register {} listener on {} ", refreshTargetKey,
+					bean);
+			TargetRefreshable listener = null;
+			if (org.springframework.util.StringUtils.hasText(key)) {
+				listener = new NacosPropertiesKeyListener(bean, wrapArrayToSet(key)) {
+
+					@Override
+					public void configChanged(ConfigChangeEvent event) {
+						try {
+							ConfigChangeItem changeItem = event.getChangeItem(key);
+							String newConfig = changeItem == null ? null : changeItem.getNewValue();
+							if (!org.springframework.util.StringUtils.hasText(newConfig)) {
+								newConfig = defaultValue;
+							}
+							if (org.springframework.util.StringUtils.hasText(newConfig)) {
+								setPrimitiveFiled(field, getTarget(), newConfig);
+							}
+						}
+						catch (Exception e) {
+							throw new RuntimeException(e);
+						}
+					}
+
+					@Override
+					public String toString() {
+						return String.format("[spring cloud alibaba nacos config key listener , key %s , target %s ] ", key, bean + "#" + field.getName());
+					}
+				};
+			}
+			else {
+				listener = new NacosConfigRefreshableListener(bean) {
+
+					@Override
+					public void receiveConfigInfo(String configInfo) {
+						if (!org.springframework.util.StringUtils.hasText(configInfo)) {
+							configInfo = defaultValue;
+						}
+						if (org.springframework.util.StringUtils.hasText(configInfo)) {
+							try {
+								setPrimitiveFiled(field, getTarget(), configInfo);
+							}
+							catch (Exception e) {
+								throw new RuntimeException(e);
+							}
+						}
+					}
+
+					@Override
+					public String toString() {
+						return String.format("[spring cloud alibaba nacos config key listener , key %s , target %s ] ", key, bean + "#" + field.getName());
+					}
+				};
+			}
+
+			nacosConfigManager.getConfigService()
+					.addListener(dataId, group, listener);
+			targetListenerMap.put(refreshTargetKey, listener);
+			return true;
+		}
+		return false;
+	}
+
+	private boolean setPrimitiveFiled(Field filed, Object bean, String value) throws Exception {
+		if (filed.getType() == int.class) {
+			filed.setInt(bean, Integer.parseInt(value));
+		}
+		else if (filed.getType() == Integer.class) {
+			ReflectionUtils.setField(filed, bean, Integer.valueOf(value));
+		}
+		else if (filed.getType() == long.class) {
+			filed.setLong(bean, Long.parseLong(value));
+		}
+		else if (filed.getType() == Long.class) {
+			ReflectionUtils.setField(filed, bean, Long.valueOf(value));
+		}
+		else if (filed.getType() == boolean.class) {
+			filed.setBoolean(bean, Boolean.parseBoolean(value));
+		}
+		else if (filed.getType() == Boolean.class) {
+			ReflectionUtils.setField(filed, bean, Boolean.valueOf(value));
+		}
+		else if (filed.getType() == double.class) {
+			filed.setDouble(bean, Double.parseDouble(value));
+		}
+		else if (filed.getType() == Double.class) {
+			ReflectionUtils.setField(filed, bean, Double.valueOf(value));
+		}
+		else if (filed.getType() == float.class) {
+			filed.setFloat(bean, Float.parseFloat(value));
+		}
+		else if (filed.getType() == Float.class) {
+			ReflectionUtils.setField(filed, bean, Float.valueOf(value));
+		}
+		else {
+			return false;
+		}
+		return true;
+	}
+
+	private boolean invokePrimitiveMethod(Method method, Object bean, String value) throws Exception {
+		Class<?> parameterType = method.getParameterTypes()[0];
+		if (parameterType == int.class) {
+			ReflectionUtils.invokeMethod(method, bean, Integer.parseInt(value));
+		}
+		else if (parameterType == Integer.class) {
+			ReflectionUtils.invokeMethod(method, bean, Integer.valueOf(value));
+		}
+		else if (parameterType == long.class) {
+			ReflectionUtils.invokeMethod(method, bean, Long.parseLong(value));
+		}
+		else if (parameterType == Long.class) {
+			ReflectionUtils.invokeMethod(method, bean, Long.valueOf(value));
+		}
+		else if (parameterType == boolean.class) {
+			ReflectionUtils.invokeMethod(method, bean, Boolean.parseBoolean(value));
+		}
+		else if (parameterType == Boolean.class) {
+			ReflectionUtils.invokeMethod(method, bean, Boolean.valueOf(value));
+		}
+		else if (parameterType == double.class) {
+			ReflectionUtils.invokeMethod(method, bean, Double.parseDouble(value));
+		}
+		else if (parameterType == Double.class) {
+			ReflectionUtils.invokeMethod(method, bean, Double.valueOf(value));
+		}
+		else if (parameterType == float.class) {
+			ReflectionUtils.invokeMethod(method, bean, Float.parseFloat(value));
+		}
+		else if (parameterType == Float.class) {
+			ReflectionUtils.invokeMethod(method, bean, Float.valueOf(value));
+		}
+		else {
+			return false;
+		}
+		return true;
+	}
+
+	private String getDestContent(String content, String key) throws Exception {
+		if (org.springframework.util.StringUtils.hasText(key)) {
+			Properties properties = PropertiesUtils.convertToProperties(content);
+			return properties.getProperty(key);
+		}
+		else {
+			return content;
+		}
+	}
+
+	private void handleMethodAnnotation(final Object bean, String beanName, final Method method) {
+		NacosConfigKeysListener keysAnnotation = AnnotationUtils.getAnnotation(method, NacosConfigKeysListener.class);
+		if (keysAnnotation != null) {
+			ReflectionUtils.makeAccessible(method);
+			handleMethodNacosConfigKeysChangeListener(keysAnnotation, beanName, bean, method);
+			return;
+		}
+		NacosConfigListener configAnnotation = AnnotationUtils.getAnnotation(method, NacosConfigListener.class);
+		if (configAnnotation != null) {
+			ReflectionUtils.makeAccessible(method);
+			handleMethodNacosConfigListener(configAnnotation, beanName, bean, method);
+			return;
+		}
+
+	}
+
+	@Override
+	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
+		this.applicationContext = applicationContext;
+		nacosConfigManager = this.applicationContext.getBean(NacosConfigManager.class);
+	}
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/NacosConfig.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Nacos Config annotation.
+ *
+ * @author shiyiyue1102
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.FIELD})
+@Documented
+public @interface NacosConfig {
+
+	String group();
+
+	String dataId();
+
+	String key() default "";
+
+	String defaultValue() default "";
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/NacosConfigKeysListener.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * @ConfigChangeEvent
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD})
+public @interface NacosConfigKeysListener {
+
+	String dataId();
+
+	String group();
+
+	String[] interestedKeys() default {};
+
+	String[] interestedKeyPrefixes() default {};
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/NacosConfigListener.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD})
+public @interface NacosConfigListener {
+
+	String dataId();
+
+	String group();
+
+	String key() default "";
+
+	boolean initNotify() default false;
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/NacosConfigRefreshableListener.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import com.alibaba.nacos.api.config.listener.AbstractListener;
+
+public abstract class NacosConfigRefreshableListener extends AbstractListener implements TargetRefreshable {
+
+	Object target;
+
+	NacosConfigRefreshableListener(Object target) {
+		this.target = target;
+	}
+
+	public Object getTarget() {
+		return target;
+	}
+
+	@Override
+	public void setTarget(Object target) {
+		this.target = target;
+	}
+
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/NacosPropertiesKeyListener.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.util.Set;
+
+import com.alibaba.nacos.api.config.ConfigChangeEvent;
+import com.alibaba.nacos.api.config.ConfigChangeItem;
+import com.alibaba.nacos.common.utils.CollectionUtils;
+
+public abstract class NacosPropertiesKeyListener extends AbstractConfigChangeListener {
+
+	Set<String> interestedKeys;
+
+	Set<String> interestedKeyPrefixes;
+
+	NacosPropertiesKeyListener(Object target) {
+		super(target);
+	}
+
+	NacosPropertiesKeyListener(Object target, Set<String> interestedKeys) {
+		this(target);
+		this.interestedKeys = interestedKeys;
+	}
+
+	public NacosPropertiesKeyListener(Object target, Set<String> interestedKeys, Set<String> interestedKeyPrefixes) {
+		this(target);
+		this.interestedKeys = interestedKeys;
+		this.interestedKeyPrefixes = interestedKeyPrefixes;
+	}
+
+	@Override
+	public final void receiveConfigChange(ConfigChangeEvent event) {
+		if (CollectionUtils.isNotEmpty(interestedKeys) || CollectionUtils.isNotEmpty(interestedKeyPrefixes)) {
+			boolean foundInterested = false;
+			for (ConfigChangeItem changeItem : event.getChangeItems()) {
+				if (interestedKeys != null && interestedKeys.contains(changeItem.getKey())) {
+					foundInterested = true;
+					break;
+				}
+				if (interestedKeyPrefixes != null) {
+					for (String prefix : interestedKeyPrefixes) {
+						if (changeItem.getKey().startsWith(prefix)) {
+							foundInterested = true;
+							break;
+						}
+					}
+				}
+			}
+			if (!foundInterested) {
+				return;
+			}
+		}
+		configChanged(event);
+	}
+
+	@Override
+	public String toString() {
+		return "NacosPropertiesKeyListener{" + "interestedKeys=" + interestedKeys + ", interestedKeyPrefixes="
+				+ interestedKeyPrefixes + '}' + "@" + hashCode();
+	}
+
+	public abstract void configChanged(ConfigChangeEvent event);
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/ObjectUtils.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.lang.reflect.Type;
+
+import org.springframework.util.StringUtils;
+
+final class ObjectUtils {
+
+	private ObjectUtils() {
+	}
+
+	public static Object convertToObject(String content, Type clazz) {
+		if (!StringUtils.hasText(content)) {
+			return null;
+		}
+
+		return convertFormJsonContent(content, clazz);
+	}
+
+	private static Object convertFormJsonContent(String content, Type clazz) {
+
+		return JsonUtils.toObj(content, clazz);
+	}
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/PropertiesUtils.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.io.StringReader;
+import java.util.Map;
+import java.util.Properties;
+
+import com.alibaba.nacos.common.utils.StringUtils;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+final class PropertiesUtils {
+
+	private PropertiesUtils() {
+	}
+
+	public static Properties convertToProperties(String content) throws Exception {
+		if (StringUtils.isBlank(content)) {
+			return new Properties();
+		}
+		try {
+			return convertFormYamlContent(content);
+		}
+		catch (Exception e) {
+			return convertFormPropertiesContent(content);
+		}
+	}
+
+	private static Properties convertFormPropertiesContent(String content) throws Exception {
+		Properties properties = new Properties();
+		properties.load(new StringReader(content));
+		return properties;
+	}
+
+	private static Properties convertFormYamlContent(String content) {
+
+		Yaml yaml = new Yaml(new SafeConstructor(new LoaderOptions()));
+		Map<String, Object> yamlMap = yaml.load(content);
+
+		Properties properties = new Properties();
+		flattenMap("", yamlMap, properties);
+
+		return properties;
+	}
+
+	private static void flattenMap(String prefix, Map<String, Object> map, Properties properties) {
+		for (Map.Entry<String, Object> entry : map.entrySet()) {
+			String key =
+					prefix.isEmpty() ? String.valueOf(entry.getKey()) : prefix + "." + String.valueOf(entry.getKey());
+			if (entry.getValue() instanceof Map) {
+				flattenMap(key, (Map<String, Object>) entry.getValue(), properties);
+			}
+			else {
+				properties.setProperty(key, entry.getValue().toString());
+			}
+		}
+	}
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/ScaYamlConfigChangeParser.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import com.alibaba.nacos.api.config.ConfigChangeItem;
+import com.alibaba.nacos.api.exception.NacosException;
+import com.alibaba.nacos.api.exception.runtime.NacosRuntimeException;
+import com.alibaba.nacos.client.config.impl.YmlChangeParser;
+import com.alibaba.nacos.common.utils.StringUtils;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.composer.ComposerException;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+import org.yaml.snakeyaml.error.MarkedYAMLException;
+
+public class ScaYamlConfigChangeParser extends YmlChangeParser {
+	private static final String INVALID_CONSTRUCTOR_ERROR_INFO = "could not determine a constructor for the tag";
+
+	public ScaYamlConfigChangeParser() {
+		super();
+	}
+
+	@Override
+	public Map<String, ConfigChangeItem> doParse(String oldContent, String newContent, String type) {
+		Map<String, Object> oldMap = Collections.emptyMap();
+		Map<String, Object> newMap = Collections.emptyMap();
+		try {
+			Yaml yaml = new Yaml(new SafeConstructor(new LoaderOptions()));
+			if (StringUtils.isNotBlank(oldContent)) {
+				oldMap = yaml.load(oldContent);
+				oldMap = getFlattenedMap(oldMap);
+			}
+			if (StringUtils.isNotBlank(newContent)) {
+				newMap = yaml.load(newContent);
+				newMap = getFlattenedMap(newMap);
+			}
+		}
+		catch (MarkedYAMLException e) {
+			handleYamlException(e);
+		}
+
+		return filterChangeData(oldMap, newMap);
+	}
+
+	private void handleYamlException(MarkedYAMLException e) {
+		if (e.getMessage().startsWith(INVALID_CONSTRUCTOR_ERROR_INFO) || e instanceof ComposerException) {
+			throw new NacosRuntimeException(NacosException.INVALID_PARAM,
+					"AbstractConfigChangeListener only support basic java data type for yaml. If you want to listen "
+							+ "key changes for custom classes, please use `Listener` to listener whole yaml configuration and parse it by yourself.",
+					e);
+		}
+		throw e;
+	}
+
+	private Map<String, Object> getFlattenedMap(Map<String, Object> source) {
+		Map<String, Object> result = new LinkedHashMap<>(128);
+		buildFlattenedMap(result, source, null);
+		return result;
+	}
+
+	private void buildFlattenedMap(Map<String, Object> result, Map<String, Object> source, String path) {
+		for (Iterator<Map.Entry<String, Object>> itr = source.entrySet().iterator(); itr.hasNext(); ) {
+			Map.Entry<String, Object> e = itr.next();
+			String key = String.valueOf(e.getKey());
+			if (StringUtils.isNotBlank(path)) {
+				if (key.startsWith("[")) {
+					key = path + key;
+				}
+				else {
+					key = path + '.' + key;
+				}
+			}
+			if (e.getValue() instanceof String) {
+				result.put(key, e.getValue());
+			}
+			else if (e.getValue() instanceof Map) {
+				@SuppressWarnings("unchecked") Map<String, Object> map = (Map<String, Object>) e.getValue();
+				buildFlattenedMap(result, map, key);
+			}
+			else if (e.getValue() instanceof Collection) {
+				@SuppressWarnings("unchecked") Collection<Object> collection = (Collection<Object>) e.getValue();
+				if (collection.isEmpty()) {
+					result.put(key, "");
+				}
+				else {
+					int count = 0;
+					for (Object object : collection) {
+						buildFlattenedMap(result, Collections.singletonMap("[" + (count++) + "]", object), key);
+					}
+				}
+			}
+			else {
+				result.put(key, (e.getValue() != null ? e.getValue() : ""));
+			}
+		}
+	}
+
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/annotation/TargetRefreshable.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2013-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.cloud.nacos.annotation;
+
+import com.alibaba.nacos.api.config.listener.Listener;
+
+public interface TargetRefreshable extends Listener {
+
+	Object getTarget();
+
+	void setTarget(Object target);
+
+}

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/resources/META-INF/services/com.alibaba.nacos.api.config.listener.ConfigChangeParser

@@ -0,0 +1 @@
+com.alibaba.cloud.nacos.annotation.ScaYamlConfigChangeParser