bugfix for NacosConfigProccessor (#3903)

Author: shiyiyue1102

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

@@ -79,12 +79,12 @@ private String getGroupKeyContent(String dataId, String group) throws Exception
 		}
 		synchronized (this) {
 			if (!groupKeyCache.containsKey(GroupKey.getKey(dataId, group))) {
-				String content = nacosConfigManager.getConfigService().getConfig(dataId, group, 5000);
+				String content = getNacosConfigManager().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() {
+				getNacosConfigManager().getConfigService().addListener(dataId, group, new AbstractListener() {
 					@Override
 					public void receiveConfigInfo(String s) {
 						groupKeyCache.get(GroupKey.getKey(dataId, group)).set(s);
@@ -105,7 +105,8 @@ public String toString() {
 
 	@Override
 	public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
-		return BeanPostProcessor.super.postProcessBeforeInitialization(bean, beanName);
+		BeanPostProcessor.super.postProcessBeforeInitialization(bean, beanName);
+		return bean;
 	}
 
 	@Override
@@ -223,7 +224,7 @@ public String toString() {
 				};
 			}
 
-			nacosConfigManager.getConfigService()
+			getNacosConfigManager().getConfigService()
 					.addListener(dataId, group, listener);
 			targetListenerMap.put(refreshTargetKey, listener);
 
@@ -270,7 +271,7 @@ public String toString() {
 				}
 			};
 			nacosPropertiesKeyListener.setLastContent(getGroupKeyContent(dataId, group));
-			nacosConfigManager.getConfigService().addListener(dataId, group,
+			getNacosConfigManager().getConfigService().addListener(dataId, group,
 					nacosPropertiesKeyListener);
 			targetListenerMap.put(refreshTargetKey, nacosPropertiesKeyListener);
 		}
@@ -382,7 +383,7 @@ public String toString() {
 				};
 			}
 
-			nacosConfigManager.getConfigService().addListener(dataId, group, listener);
+			getNacosConfigManager().getConfigService().addListener(dataId, group, listener);
 			targetListenerMap.put(refreshTargetKey, listener);
 			if (annotation.initNotify() && org.springframework.util.StringUtils.hasText(configInfo)) {
 				try {
@@ -519,7 +520,7 @@ public String toString() {
 				};
 			}
 
-			nacosConfigManager.getConfigService()
+			getNacosConfigManager().getConfigService()
 					.addListener(dataId, group, listener);
 			targetListenerMap.put(refreshTargetKey, listener);
 
@@ -604,7 +605,7 @@ public String toString() {
 				};
 			}
 
-			nacosConfigManager.getConfigService()
+			getNacosConfigManager().getConfigService()
 					.addListener(dataId, group, listener);
 			targetListenerMap.put(refreshTargetKey, listener);
 			return true;
@@ -739,7 +740,14 @@ private void handleMethodAnnotation(final Object bean, String beanName, final Me
 	@Override
 	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
 		this.applicationContext = applicationContext;
-		nacosConfigManager = this.applicationContext.getBean(NacosConfigManager.class);
+	}
+
+	private NacosConfigManager getNacosConfigManager() {
+		if (this.nacosConfigManager == null) {
+			nacosConfigManager = this.applicationContext.getBean(NacosConfigManager.class);
+
+		}
+		return nacosConfigManager;
 	}
 
 	private static String[] getNullPropertyNames(Object source) {