修复项目启动注入属性为null的空指针问题 (#357)

* resolve javadoc error.

* add maven-war-plugin

nacos-spring-context-aot/pom.xml

@@ -30,9 +30,7 @@
         <dependency>
             <groupId>com.alibaba.nacos</groupId>
             <artifactId>nacos-spring-context</artifactId>
-            <version>${revision}</version>
             <optional>true</optional>
         </dependency>
     </dependencies>
-
 </project>

nacos-spring-context/pom.xml

@@ -17,19 +17,15 @@
     <packaging>jar</packaging>
 
     <dependencies>
-
         <!-- java-->
         <dependency>
             <groupId>javax.annotation</groupId>
             <artifactId>javax.annotation-api</artifactId>
-            <version>${javax.annotation-api.version}</version>
         </dependency>
-
         <!-- Nacos -->
         <dependency>
             <groupId>com.alibaba.nacos</groupId>
             <artifactId>nacos-client</artifactId>
-            <version>${nacos.version}</version>
             <exclusions>
                 <exclusion>
                     <groupId>org.yaml</groupId>
@@ -41,38 +37,30 @@
                 </exclusion>
             </exclusions>
         </dependency>
-        
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-core</artifactId>
-            <version>2.13.4</version>
         </dependency>
-
         <!--yaml-->
         <dependency>
             <groupId>org.yaml</groupId>
             <artifactId>snakeyaml</artifactId>
-            <version>${snake.yaml.version}</version>
         </dependency>
-
         <!-- Spring Framework -->
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
             <scope>provided</scope>
         </dependency>
-
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
         </dependency>
-
         <!-- Spring Context Extras -->
         <dependency>
             <groupId>com.alibaba.spring</groupId>
             <artifactId>spring-context-support</artifactId>
         </dependency>
-
         <!-- Testing -->
         <dependency>
             <groupId>${project.groupId}</groupId>
@@ -80,30 +68,27 @@
             <version>${project.version}</version>
             <scope>test</scope>
         </dependency>
-
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-test</artifactId>
             <scope>test</scope>
         </dependency>
-        
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.2.9</version>
             <scope>provided</scope>
         </dependency>
-
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>
         </dependency>
-
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+        </dependency>
     </dependencies>
-
-</project>
+</project>

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/beans/factory/annotation/AbstractAnnotationBeanPostProcessor.java

@@ -406,8 +406,10 @@ public abstract class AbstractAnnotationBeanPostProcessor implements Instantiati
 
         if (injectedObject == null) {
             injectedObject = doGetInjectedBean(attributes, bean, beanName, injectedType, injectedElement);
-            // Customized inject-object if necessary
-            injectedObjectsCache.putIfAbsent(cacheKey, injectedObject);
+            if (injectedObject != null) {
+                // Customized inject-object if necessary
+                injectedObjectsCache.putIfAbsent(cacheKey, injectedObject);  
+            }
         }
 
         return injectedObject;
@@ -639,4 +641,4 @@ public abstract class AbstractAnnotationBeanPostProcessor implements Instantiati
             }
         }
     }
-}
+}

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/context/annotation/config/NacosValueAnnotationBeanPostProcessor.java

@@ -28,6 +28,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.commons.lang3.StringUtils;
 import com.alibaba.nacos.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -181,7 +182,7 @@ public class NacosValueAnnotationBeanPostProcessor
 	}
 
 	private Object resolveNotifyValue(String nacosValueExpr, String key, String newValue) {
-		String spelExpr = nacosValueExpr.replaceAll("\\$\\{" + key + PLACEHOLDER_SUFFIX, newValue);
+		String spelExpr = StringUtils.replace(nacosValueExpr, PLACEHOLDER_PREFIX + key + PLACEHOLDER_SUFFIX, newValue);
 		return resolveStringValue(spelExpr);
 	}
 

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/context/annotation/config/SpringValueAnnotationBeanPostProcessor.java

@@ -0,0 +1,331 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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
+ *
+ *     http://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.nacos.spring.context.annotation.config;
+
+import com.alibaba.nacos.common.utils.MD5Utils;
+import com.alibaba.nacos.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor;
+import com.alibaba.nacos.spring.context.event.config.NacosConfigReceivedEvent;
+import com.alibaba.nacos.spring.util.NacosUtils;
+import com.alibaba.nacos.spring.util.PlaceholderHelper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.BeansException;
+import org.springframework.beans.TypeConverter;
+import org.springframework.beans.factory.BeanFactory;
+import org.springframework.beans.factory.BeanFactoryAware;
+import org.springframework.beans.factory.annotation.InjectionMetadata;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.beans.factory.config.BeanExpressionContext;
+import org.springframework.beans.factory.config.BeanExpressionResolver;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
+import org.springframework.context.ApplicationListener;
+import org.springframework.context.EnvironmentAware;
+import org.springframework.core.MethodParameter;
+import org.springframework.core.annotation.AnnotationAttributes;
+import org.springframework.core.env.Environment;
+import org.springframework.util.ReflectionUtils;
+import org.springframework.util.StringUtils;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Member;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.*;
+
+import static org.springframework.core.annotation.AnnotationUtils.getAnnotation;
+
+/**
+ * @author wuhaoqiang
+ * @since 1.1.2
+ **/
+public class SpringValueAnnotationBeanPostProcessor
+        extends AbstractAnnotationBeanPostProcessor implements BeanFactoryAware,
+        EnvironmentAware, ApplicationListener<NacosConfigReceivedEvent> {
+
+    /**
+     * The name of {@link SpringValueAnnotationBeanPostProcessor} bean.
+     */
+    public static final String BEAN_NAME = "StringValueAnnotationBeanPostProcessor";
+
+    private final Logger logger = LoggerFactory.getLogger(getClass());
+
+    /**
+     * placeholder, valueTarget.
+     */
+    private Map<String, List<StringValueTarget>> placeholderStringValueTargetMap = new HashMap<String, List<StringValueTarget>>();
+
+    private ConfigurableListableBeanFactory beanFactory;
+
+    private Environment environment;
+
+    private BeanExpressionResolver exprResolver;
+
+    private BeanExpressionContext exprContext;
+
+    public SpringValueAnnotationBeanPostProcessor() {
+        super(Value.class);
+    }
+
+    @Override
+    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
+        if (!(beanFactory instanceof ConfigurableListableBeanFactory)) {
+            throw new IllegalArgumentException(
+                    "StringValueAnnotationBeanPostProcessor requires a ConfigurableListableBeanFactory");
+        }
+        this.beanFactory = (ConfigurableListableBeanFactory) beanFactory;
+        this.exprResolver = ((ConfigurableListableBeanFactory) beanFactory).getBeanExpressionResolver();
+        this.exprContext = new BeanExpressionContext((ConfigurableListableBeanFactory) beanFactory, null);
+    }
+
+    @Override
+    public void setEnvironment(Environment environment) {
+        this.environment = environment;
+    }
+
+    @Override
+    protected Object doGetInjectedBean(AnnotationAttributes attributes, Object bean,
+                                       String beanName, Class<?> injectedType,
+                                       InjectionMetadata.InjectedElement injectedElement) throws Exception {
+        Object value = resolveStringValue(attributes.getString("value"));
+        Member member = injectedElement.getMember();
+        if (member instanceof Field) {
+            return convertIfNecessary((Field) member, value);
+        }
+
+        if (member instanceof Method) {
+            return convertIfNecessary((Method) member, value);
+        }
+
+        return null;
+    }
+
+    @Override
+    protected String buildInjectedObjectCacheKey(AnnotationAttributes attributes,
+                                                 Object bean, String beanName, Class<?> injectedType,
+                                                 InjectionMetadata.InjectedElement injectedElement) {
+        return bean.getClass().getName() + attributes;
+    }
+
+    @Override
+    public Object postProcessBeforeInitialization(Object bean, final String beanName)
+            throws BeansException {
+
+        doWithFields(bean, beanName);
+
+        doWithMethods(bean, beanName);
+
+        return super.postProcessBeforeInitialization(bean, beanName);
+    }
+
+    @Override
+    public void onApplicationEvent(NacosConfigReceivedEvent event) {
+        if (StringUtils.isEmpty(event)) {
+            return;
+        }
+        Map<String, Object> updateProperties = NacosUtils.toProperties(event.getContent(), event.getType());
+
+        for (Map.Entry<String, List<StringValueTarget>> entry : placeholderStringValueTargetMap
+                .entrySet()) {
+
+            String key = environment.resolvePlaceholders(entry.getKey());
+            // Process modified keys, excluding deleted keys
+            if (!updateProperties.containsKey(key)) {
+                continue;
+            }
+            String newValue = environment.getProperty(key);
+
+            if (newValue == null) {
+                continue;
+            }
+            List<StringValueTarget> beanPropertyList = entry.getValue();
+            for (StringValueTarget target : beanPropertyList) {
+                String md5String = MD5Utils.md5Hex(newValue, "UTF-8");
+                boolean isUpdate = !target.lastMD5.equals(md5String);
+                if (isUpdate) {
+                    target.updateLastMD5(md5String);
+                    Object evaluatedValue = resolveStringValue(target.stringValueExpr);
+                    if (target.method == null) {
+                        setField(target, evaluatedValue);
+                    } else {
+                        setMethod(target, evaluatedValue);
+                    }
+                }
+            }
+        }
+    }
+
+    private Object resolveStringValue(String strVal) {
+        String value = beanFactory.resolveEmbeddedValue(strVal);
+        if (exprResolver != null && value != null) {
+            return exprResolver.evaluate(value, exprContext);
+        }
+        return value;
+    }
+
+    private Object convertIfNecessary(Field field, Object value) {
+        TypeConverter converter = beanFactory.getTypeConverter();
+        return converter.convertIfNecessary(value, field.getType(), field);
+    }
+
+    private Object convertIfNecessary(Method method, Object value) {
+        Class<?>[] paramTypes = method.getParameterTypes();
+        Object[] arguments = new Object[paramTypes.length];
+
+        TypeConverter converter = beanFactory.getTypeConverter();
+
+        if (arguments.length == 1) {
+            return converter.convertIfNecessary(value, paramTypes[0],
+                    new MethodParameter(method, 0));
+        }
+
+        for (int i = 0; i < arguments.length; i++) {
+            arguments[i] = converter.convertIfNecessary(value, paramTypes[i],
+                    new MethodParameter(method, i));
+        }
+
+        return arguments;
+    }
+
+    private void doWithFields(final Object bean, final String beanName) {
+        ReflectionUtils.doWithFields(bean.getClass(),
+                new ReflectionUtils.FieldCallback() {
+                    @Override
+                    public void doWith(Field field) throws IllegalArgumentException {
+                        Value annotation = getAnnotation(field, Value.class);
+                        doWithAnnotation(beanName, bean, annotation, field.getModifiers(),
+                                null, field);
+                    }
+                });
+    }
+
+    private void doWithMethods(final Object bean, final String beanName) {
+        ReflectionUtils.doWithMethods(bean.getClass(),
+                new ReflectionUtils.MethodCallback() {
+                    @Override
+                    public void doWith(Method method) throws IllegalArgumentException {
+                        Value annotation = getAnnotation(method, Value.class);
+                        doWithAnnotation(beanName, bean, annotation,
+                                method.getModifiers(), method, null);
+                    }
+                });
+    }
+
+    private void doWithAnnotation(String beanName, Object bean, Value annotation,
+                                  int modifiers, Method method, Field field) {
+        if (annotation != null) {
+            if (Modifier.isStatic(modifiers)) {
+                return;
+            }
+
+            Set<String> placeholderList = PlaceholderHelper.findPlaceholderKeys(annotation.value());
+            for (String placeholder : placeholderList) {
+                StringValueTarget stringValueTarget = new StringValueTarget(bean, beanName,
+                        method, field, annotation.value());
+                put2ListMap(placeholderStringValueTargetMap, placeholder,
+                        stringValueTarget);
+            }
+        }
+    }
+
+    private <K, V> void put2ListMap(Map<K, List<V>> map, K key, V value) {
+        List<V> valueList = map.get(key);
+        if (valueList == null) {
+            valueList = new ArrayList<V>();
+        }
+        valueList.add(value);
+        map.put(key, valueList);
+    }
+
+    private void setMethod(StringValueTarget stringValueTarget, Object propertyValue) {
+        Method method = stringValueTarget.method;
+        ReflectionUtils.makeAccessible(method);
+        try {
+            method.invoke(stringValueTarget.bean,
+                    convertIfNecessary(method, propertyValue));
+
+            if (logger.isDebugEnabled()) {
+                logger.debug("Update value with {} (method) in {} (bean) with {}",
+                        method.getName(), stringValueTarget.beanName, propertyValue);
+            }
+        } catch (Throwable e) {
+            if (logger.isErrorEnabled()) {
+                logger.error("Can't update value with " + method.getName()
+                        + " (method) in " + stringValueTarget.beanName + " (bean)", e);
+            }
+        }
+    }
+
+    private void setField(final StringValueTarget stringValueTarget,
+                          final Object propertyValue) {
+        final Object bean = stringValueTarget.bean;
+
+        Field field = stringValueTarget.field;
+
+        String fieldName = field.getName();
+
+        try {
+            ReflectionUtils.makeAccessible(field);
+            field.set(bean, convertIfNecessary(field, propertyValue));
+
+            if (logger.isDebugEnabled()) {
+                logger.debug("Update value of the {}" + " (field) in {} (bean) with {}",
+                        fieldName, stringValueTarget.beanName, propertyValue);
+            }
+        } catch (Throwable e) {
+            if (logger.isErrorEnabled()) {
+                logger.error("Can't update value of the " + fieldName + " (field) in "
+                        + stringValueTarget.beanName + " (bean)", e);
+            }
+        }
+    }
+
+    private static class StringValueTarget {
+
+        private final Object bean;
+
+        private final String beanName;
+
+        private final Method method;
+
+        private final Field field;
+
+        private String lastMD5;
+
+        private final String stringValueExpr;
+
+        StringValueTarget(Object bean, String beanName, Method method, Field field, String stringValueExpr) {
+            this.bean = bean;
+
+            this.beanName = beanName;
+
+            this.method = method;
+
+            this.field = field;
+
+            this.lastMD5 = "";
+
+            this.stringValueExpr = stringValueExpr;
+        }
+
+        protected void updateLastMD5(String newMD5) {
+            this.lastMD5 = newMD5;
+        }
+
+    }
+
+}

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/context/event/config/EventPublishingConfigService.java

@@ -174,7 +174,7 @@ public class EventPublishingConfigService
 
 	/**
 	 * Destroy lifecycle method to invoke {@link #shutDown()}
-	 * @throws Exception
+	 * @throws Exception throw exception
 	 * @since 1.0.0
 	 */
 	@Override

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/enums/FileTypeEnum.java

@@ -87,7 +87,7 @@ public enum FileTypeEnum {
      * Get the corresponding FileTypeEnum by file extension or fileType. If not found FileTypeEnum.TEXT is returned
      *
      * @param extOrFileType file extension or fileType
-     * @return
+     * @return return {@link FileTypeEnum}
      */
     public static FileTypeEnum getFileTypeEnumByFileExtensionOrFileType(String extOrFileType) {
         if (StringUtils.isNotBlank(extOrFileType)) {

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/util/ConfigParseUtils.java

@@ -92,7 +92,8 @@ public final class ConfigParseUtils {
 
 		if (DEFAULT_CONFIG_PARSE_MAP.containsKey(type)) {
 			ConfigParse configParse = DEFAULT_CONFIG_PARSE_MAP.get(type);
-			return configParse.parse(context);
+			Map<String, Object> parseMap = configParse.parse(context);
+			return parseMap == null ? new HashMap<>() : parseMap;
 		}
 		else {
 			throw new UnsupportedOperationException(

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/util/NacosBeanUtils.java

@@ -29,6 +29,7 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import com.alibaba.nacos.spring.context.annotation.config.SpringValueAnnotationBeanPostProcessor;
 import org.apache.commons.lang3.ArrayUtils;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.ListableBeanFactory;
@@ -362,6 +363,13 @@ public abstract class NacosBeanUtils {
 				NacosValueAnnotationBeanPostProcessor.class);
 	}
 
+	public static void registerStringValueAnnotationBeanPostProcessor(
+			BeanDefinitionRegistry registry) {
+		registerInfrastructureBeanIfAbsent(registry,
+				SpringValueAnnotationBeanPostProcessor.BEAN_NAME,
+				SpringValueAnnotationBeanPostProcessor.class);
+	}
+
 	/**
 	 * Register Nacos Common Beans
 	 *
@@ -398,6 +406,8 @@ public abstract class NacosBeanUtils {
 
 		registerNacosValueAnnotationBeanPostProcessor(registry);
 
+		registerStringValueAnnotationBeanPostProcessor(registry);
+
 		registerConfigServiceBeanBuilder(registry);
 
 		registerLoggingNacosConfigMetadataEventListener(registry);

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/util/NacosUtils.java

@@ -532,6 +532,7 @@ public abstract class NacosUtils {
 	 * @param group config group
 	 * @param text config context
 	 * @param type config type
+	 * @return  map format of result
 	 */
 	public static Map<String, Object> toProperties(String dataId, String group,
 			String text, String type) {

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/util/PlaceholderHelper.java

@@ -0,0 +1,126 @@
+package com.alibaba.nacos.spring.util;
+
+import com.google.common.base.Strings;
+import com.google.common.collect.Sets;
+import org.springframework.util.StringUtils;
+
+import java.util.Set;
+import java.util.Stack;
+
+/**
+ * @author wuhaoqiang
+ * @since 1.1.2
+ **/
+public class PlaceholderHelper {
+
+    private static final String PLACEHOLDER_PREFIX = "${";
+    private static final String PLACEHOLDER_SUFFIX = "}";
+    private static final String VALUE_SEPARATOR = ":";
+    private static final String SIMPLE_PLACEHOLDER_PREFIX = "{";
+
+    /**
+     * find keys from placeholder
+     * ${key} - "key"
+     * xxx${key}yyy - "key"
+     * ${key:${key2:1}} - "key", "key2"
+     * ${${key}} - "key"
+     * ${${key:100}} - "key"
+     * ${${key}:${key2}} - "key", "key2"
+     * @param propertyString ${key}
+     * @return key
+     */
+    public static Set<String> findPlaceholderKeys(String propertyString) {
+        Set<String> placeholderKeys = Sets.newHashSet();
+
+        if (Strings.isNullOrEmpty(propertyString) ||
+                !(propertyString.contains(PLACEHOLDER_PREFIX) && propertyString.contains(PLACEHOLDER_SUFFIX))) {
+            return placeholderKeys;
+        }
+        // handle xxx${yyy}zzz -> ${yyy}zzz
+        propertyString = propertyString.substring(propertyString.indexOf(PLACEHOLDER_PREFIX));
+
+        Stack<String> stack = new Stack<String>();
+        stack.push(propertyString);
+
+        while (!stack.isEmpty()) {
+            String strVal = stack.pop();
+            int startIndex = strVal.indexOf(PLACEHOLDER_PREFIX);
+            if (startIndex == -1) {
+                placeholderKeys.add(strVal);
+                continue;
+            }
+            int endIndex = findPlaceholderEndIndex(strVal, startIndex);
+            if (endIndex == -1) {
+                // invalid placeholder
+                continue;
+            }
+
+            String placeholderCandidate = strVal.substring(startIndex + PLACEHOLDER_PREFIX.length(), endIndex);
+
+            // ${key}
+            // startsWith '${' continue
+            if (placeholderCandidate.startsWith(PLACEHOLDER_PREFIX)) {
+                stack.push(placeholderCandidate);
+            } else {
+                // exist ':' -> key:${key2:2}
+                int separatorIndex = placeholderCandidate.indexOf(VALUE_SEPARATOR);
+
+                if (separatorIndex == -1) {
+                    stack.push(placeholderCandidate);
+                } else {
+                    stack.push(placeholderCandidate.substring(0, separatorIndex));
+                    String defaultValuePart =
+                            normalizeToPlaceholder(placeholderCandidate.substring(separatorIndex + VALUE_SEPARATOR.length()));
+                    if (!Strings.isNullOrEmpty(defaultValuePart)) {
+                        stack.push(defaultValuePart);
+                    }
+                }
+            }
+
+            // has remaining part, e.g. ${a}.${b}
+            if (endIndex + PLACEHOLDER_SUFFIX.length() < strVal.length() - 1) {
+                String remainingPart = normalizeToPlaceholder(strVal.substring(endIndex + PLACEHOLDER_SUFFIX.length()));
+                if (!Strings.isNullOrEmpty(remainingPart)) {
+                    stack.push(remainingPart);
+                }
+            }
+        }
+
+        return placeholderKeys;
+    }
+
+    private static String normalizeToPlaceholder(String strVal) {
+        int startIndex = strVal.indexOf(PLACEHOLDER_PREFIX);
+        if (startIndex == -1) {
+            return null;
+        }
+        int endIndex = strVal.lastIndexOf(PLACEHOLDER_SUFFIX);
+        if (endIndex == -1) {
+            return null;
+        }
+
+        return strVal.substring(startIndex, endIndex + PLACEHOLDER_SUFFIX.length());
+    }
+
+    private static int findPlaceholderEndIndex(CharSequence buf, int startIndex) {
+        int index = startIndex + PLACEHOLDER_PREFIX.length();
+        int withinNestedPlaceholder = 0;
+        while (index < buf.length()) {
+            if (StringUtils.substringMatch(buf, index, PLACEHOLDER_SUFFIX)) {
+                if (withinNestedPlaceholder > 0) {
+                    withinNestedPlaceholder--;
+                    index = index + PLACEHOLDER_SUFFIX.length();
+                } else {
+                    return index;
+                }
+            } else if (StringUtils.substringMatch(buf, index, SIMPLE_PLACEHOLDER_PREFIX)) {
+                withinNestedPlaceholder++;
+                index = index + SIMPLE_PLACEHOLDER_PREFIX.length();
+            } else {
+                index++;
+            }
+        }
+        return -1;
+    }
+}
+

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/util/aot/NativeDetector.java

@@ -25,7 +25,7 @@ public abstract class NativeDetector {
 	private static final boolean imageCode = (System.getProperty("org.graalvm.nativeimage.imagecode") != null);
 
 	/**
-	 * Returns {@code true} if invoked in the context of image building or during image runtime, else {@code false}.
+	 * @return Returns {@code true} if invoked in the context of image building or during image runtime, else {@code false}.
 	 */
 	public static boolean inNativeImage() {
 		return imageCode;

nacos-spring-context/src/main/java/com/alibaba/nacos/spring/util/parse/DefaultYamlConfigParse.java

@@ -27,18 +27,14 @@ import org.yaml.snakeyaml.LoaderOptions;
 import org.yaml.snakeyaml.Yaml;
 import org.yaml.snakeyaml.constructor.Constructor;
 import org.yaml.snakeyaml.constructor.SafeConstructor;
-import org.yaml.snakeyaml.nodes.MappingNode;
 import org.yaml.snakeyaml.nodes.Tag;
-import org.yaml.snakeyaml.parser.ParserException;
 import org.yaml.snakeyaml.representer.Representer;
 import org.yaml.snakeyaml.resolver.Resolver;
 
-import java.util.AbstractMap;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.Map;
-import java.util.Set;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.regex.Pattern;
 
@@ -49,30 +45,30 @@ import java.util.regex.Pattern;
  * @since 0.3.0
  */
 public class DefaultYamlConfigParse extends AbstractConfigParse {
-    
+
     protected static final Logger LOGGER = LoggerFactory.getLogger(DefaultYamlConfigParse.class);
-    
+
     private static final String YAML_ALLOW_COMPLEX_OBJECT = "yamlAllowComplexObject";
-    
+
     private static boolean getYamlAllowComplexObject() {
         return Boolean.getBoolean(YAML_ALLOW_COMPLEX_OBJECT);
     }
-    
+
     protected static Yaml createYaml() {
-        SafeConstructor constructor;
-        if (getYamlAllowComplexObject()) {
-            constructor = new Constructor();
-        } else {
-            constructor = new SafeConstructor();
-        }
-        Representer representer = new Representer();
-        DumperOptions dumperOptions = new DumperOptions();
-        LimitedResolver resolver = new LimitedResolver();
         LoaderOptions loaderOptions = new LoaderOptions();
         loaderOptions.setAllowDuplicateKeys(false);
+        SafeConstructor constructor;
+        if (getYamlAllowComplexObject()) {
+            constructor = new Constructor(loaderOptions);
+        } else {
+            constructor = new SafeConstructor(loaderOptions);
+        }
+        DumperOptions dumperOptions = new DumperOptions();
+        Representer representer = new Representer(dumperOptions);
+        LimitedResolver resolver = new LimitedResolver();
         return new Yaml(constructor, representer, dumperOptions, loaderOptions, resolver);
     }
-    
+
     protected static boolean process(MatchCallback callback, Yaml yaml, String content) {
         int count = 0;
         if (LOGGER.isDebugEnabled()) {
@@ -88,7 +84,7 @@ public class DefaultYamlConfigParse extends AbstractConfigParse {
         }
         return (count > 0);
     }
-    
+
     protected static boolean process(Map<String, Object> map, MatchCallback callback) {
         if (LOGGER.isDebugEnabled()) {
             LOGGER.debug("Merging document (no matchers set): " + map);
@@ -96,7 +92,7 @@ public class DefaultYamlConfigParse extends AbstractConfigParse {
         callback.process(getFlattenedMap(map));
         return true;
     }
-    
+
     @SuppressWarnings("unchecked")
     protected static Map<String, Object> asMap(Object object) {
         // YAML can have numbers as keys
@@ -106,7 +102,7 @@ public class DefaultYamlConfigParse extends AbstractConfigParse {
             result.put("document", object);
             return result;
         }
-        
+
         Map<Object, Object> map = (Map<Object, Object>) object;
         for (Map.Entry<Object, Object> entry : map.entrySet()) {
             Object key = entry.getKey();
@@ -122,9 +118,9 @@ public class DefaultYamlConfigParse extends AbstractConfigParse {
         }
         return result;
     }
-    
+
     private static class LimitedResolver extends Resolver {
-        
+
         @Override
         public void addImplicitResolver(Tag tag, Pattern regexp, String first) {
             if (tag == Tag.TIMESTAMP) {
@@ -133,13 +129,13 @@ public class DefaultYamlConfigParse extends AbstractConfigParse {
             super.addImplicitResolver(tag, regexp, first);
         }
     }
-    
+
     protected static Map<String, Object> getFlattenedMap(Map<String, Object> source) {
         Map<String, Object> result = new LinkedHashMap<String, Object>();
         buildFlattenedMap(result, source, null);
         return result;
     }
-    
+
     protected static void buildFlattenedMap(Map<String, Object> result, Map<String, Object> source, String path) {
         for (Map.Entry<String, Object> entry : source.entrySet()) {
             String key = entry.getKey();
@@ -169,7 +165,7 @@ public class DefaultYamlConfigParse extends AbstractConfigParse {
             }
         }
     }
-    
+
     @Override
     public Map<String, Object> parse(String configText) {
         final AtomicReference<Map<String, Object>> result = new AtomicReference<Map<String, Object>>();
@@ -181,14 +177,14 @@ public class DefaultYamlConfigParse extends AbstractConfigParse {
         }, createYaml(), configText);
         return result.get();
     }
-    
+
     @Override
     public String processType() {
         return ConfigType.YAML.getType();
     }
-    
+
     protected interface MatchCallback {
-        
+
         /**
          * Put Map to Properties.
          *
@@ -196,5 +192,5 @@ public class DefaultYamlConfigParse extends AbstractConfigParse {
          */
         void process(Map<String, Object> map);
     }
-    
+
 }

nacos-spring-context/src/test/java/com/alibaba/nacos/spring/util/PlaceholderHelperTest.java

@@ -0,0 +1,33 @@
+package com.alibaba.nacos.spring.util;
+
+import com.google.common.collect.Sets;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author whq
+ * @since 1.1.2
+ */
+public class PlaceholderHelperTest {
+
+    @Test
+    public void testFindPlaceholderKeys() {
+        /**
+         * find keys from placeholder
+         * ${key} => "key"
+         * xxx${key}yyy => "key"
+         * ${key:${key2:1}} => "key", "key2"
+         * ${${key}} => "key"
+         * ${${key:100}} => "key"
+         * ${${key}:${key2}} => "key", "key2"
+         */
+        Assert.assertEquals(PlaceholderHelper.findPlaceholderKeys("${key}"), Sets.newHashSet("key"));
+        Assert.assertEquals(PlaceholderHelper.findPlaceholderKeys("xxx${key}yyy"), Sets.newHashSet("key"));
+        Assert.assertEquals(PlaceholderHelper.findPlaceholderKeys("${key:${key2:1}}"), Sets.newHashSet("key", "key2"));
+        Assert.assertEquals(PlaceholderHelper.findPlaceholderKeys("${${key}}"), Sets.newHashSet("key"));
+        Assert.assertEquals(PlaceholderHelper.findPlaceholderKeys("${${key:100}}"), Sets.newHashSet("key"));
+        Assert.assertEquals(PlaceholderHelper.findPlaceholderKeys("${${key}:${key2}}"), Sets.newHashSet("key", "key2"));
+
+    }
+
+}

nacos-spring-samples/nacos-embedded-webserver/pom.xml

@@ -15,34 +15,25 @@
     <name>Alibaba Nacos :: Samples :: Embedded Web Server</name>
 
     <dependencies>
-
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>javax.servlet-api</artifactId>
         </dependency>
-
         <dependency>
             <groupId>javax.annotation</groupId>
             <artifactId>javax.annotation-api</artifactId>
         </dependency>
-
         <dependency>
             <groupId>com.alibaba.nacos</groupId>
             <artifactId>nacos-client</artifactId>
-            <version>${nacos.version}</version>
         </dependency>
-        
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>${slf4j.version}</version>
-            <scope>compile</scope>
         </dependency>
-        
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-core</artifactId>
         </dependency>
-
     </dependencies>
-</project>
+</project>

nacos-spring-samples/nacos-spring-webmvc-sample/pom.xml

@@ -16,45 +16,34 @@
     <packaging>war</packaging>
 
     <dependencies>
-
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>javax.servlet-api</artifactId>
         </dependency>
-
         <dependency>
             <groupId>javax.annotation</groupId>
             <artifactId>javax.annotation-api</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-core</artifactId>
-            <version>4.0.5.RELEASE</version>
         </dependency>
-
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-webmvc</artifactId>
         </dependency>
-
         <dependency>
             <groupId>${project.groupId}</groupId>
             <artifactId>nacos-spring-context</artifactId>
-            <version>${project.version}</version>
         </dependency>
-
         <dependency>
             <groupId>${project.groupId}</groupId>
             <artifactId>nacos-embedded-webserver</artifactId>
-            <version>${project.version}</version>
         </dependency>
-
     </dependencies>
 
     <build>

nacos-spring-samples/pom.xml

@@ -20,20 +20,6 @@
         <module>nacos-spring-webmvc-sample</module>
     </modules>
 
-    <dependencyManagement>
-
-        <dependencies>
-
-            <dependency>
-                <groupId>org.springframework</groupId>
-                <artifactId>spring-webmvc</artifactId>
-                <version>${spring.framework.version}</version>
-            </dependency>
-
-        </dependencies>
-
-    </dependencyManagement>
-
     <build>
         <plugins>
             <plugin>
@@ -46,6 +32,4 @@
             </plugin>
         </plugins>
     </build>
-
-
 </project>

pom.xml

@@ -51,14 +51,12 @@
     </mailingLists>
 
     <developers>
-
         <developer>
             <id>Alibaba Nacos</id>
             <name>Nacos</name>
             <url>http://nacos.io</url>
             <email>nacos_dev@linux.alibaba.com</email>
         </developer>
-
         <developer>
             <id>mercyblitz</id>
             <name>小马哥</name>
@@ -76,7 +74,7 @@
     </licenses>
 
     <properties>
-        <revision>2.1.0</revision>
+        <revision>2.1.1</revision>
         <argLine>-Dfile.encoding=UTF-8</argLine>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
@@ -93,8 +91,10 @@
         <nacos.version>2.2.1</nacos.version>
         <!-- Spring -->
         <spring.framework.version>5.2.9.RELEASE</spring.framework.version>
+        <logback-classic.version>1.2.9</logback-classic.version>
+        <guava.version>32.0.0-jre</guava.version>
         <spring6.framework.version>6.0.8</spring6.framework.version>
-        <snake.yaml.version>1.29</snake.yaml.version>
+        <snakeyaml.version>1.29</snakeyaml.version>
         <!-- Servlet -->
         <servlet-api.version>3.0.1</servlet-api.version>
         <!-- javax-->
@@ -103,82 +103,118 @@
         <commons-lang3.version>3.4</commons-lang3.version>
         <!-- Alibaba's Spring Context Support -->
         <spring-context-support.version>1.0.11</spring-context-support.version>
+        <jackson-core.version>2.13.4</jackson-core.version>
         <slf4j.version>1.7.7</slf4j.version>
+        <junit.version>4.12</junit.version>
+        <mockito-core.version>2.15.0</mockito-core.version>
     </properties>
 
     <!-- 管理依赖版本号,子项目不会默认依赖 -->
     <dependencyManagement>
         <dependencies>
-
             <dependency>
                 <groupId>javax.servlet</groupId>
                 <artifactId>javax.servlet-api</artifactId>
                 <version>${servlet-api.version}</version>
                 <scope>provided</scope>
             </dependency>
-
+            <dependency>
+                <groupId>org.slf4j</groupId>
+                <artifactId>slf4j-api</artifactId>
+                <version>${slf4j.version}</version>
+                <scope>compile</scope>
+            </dependency>
             <dependency>
                 <groupId>com.alibaba.nacos</groupId>
                 <artifactId>nacos-client</artifactId>
                 <version>${nacos.version}</version>
             </dependency>
-
             <!-- Alibaba's Spring Context Support -->
             <dependency>
                 <groupId>com.alibaba.spring</groupId>
                 <artifactId>spring-context-support</artifactId>
                 <version>${spring-context-support.version}</version>
             </dependency>
-
             <dependency>
                 <groupId>javax.annotation</groupId>
                 <artifactId>javax.annotation-api</artifactId>
                 <version>${javax.annotation-api.version}</version>
             </dependency>
-
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-core</artifactId>
+                <version>${jackson-core.version}</version>
+            </dependency>
+            <!--yaml-->
+            <dependency>
+                <groupId>org.yaml</groupId>
+                <artifactId>snakeyaml</artifactId>
+                <version>${snakeyaml.version}</version>
+            </dependency>
             <dependency>
                 <groupId>org.apache.commons</groupId>
                 <artifactId>commons-lang3</artifactId>
                 <version>${commons-lang3.version}</version>
             </dependency>
-
             <!-- Spring Framework -->
-
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-core</artifactId>
                 <version>${spring.framework.version}</version>
                 <optional>true</optional>
             </dependency>
-
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-context</artifactId>
                 <version>${spring.framework.version}</version>
                 <optional>true</optional>
             </dependency>
-
             <!-- Testing -->
             <dependency>
                 <groupId>junit</groupId>
                 <artifactId>junit</artifactId>
-                <version>4.12</version>
+                <version>${junit.version}</version>
                 <scope>test</scope>
             </dependency>
-
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-test</artifactId>
                 <version>${spring.framework.version}</version>
                 <scope>test</scope>
             </dependency>
-
             <dependency>
                 <groupId>org.mockito</groupId>
                 <artifactId>mockito-core</artifactId>
-                <version>2.15.0</version>
+                <version>${mockito-core.version}</version>
                 <scope>test</scope>
             </dependency>
+            <dependency>
+                <groupId>org.springframework</groupId>
+                <artifactId>spring-webmvc</artifactId>
+                <version>${spring.framework.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>ch.qos.logback</groupId>
+                <artifactId>logback-classic</artifactId>
+                <version>${logback-classic.version}</version>
+                <scope>provided</scope>
+            </dependency>
+            <dependency>
+                <groupId>com.google.guava</groupId>
+                <artifactId>guava</artifactId>
+                <version>${guava.version}</version>
+            </dependency>
+
+            <dependency>
+                <groupId>${project.groupId}</groupId>
+                <artifactId>nacos-spring-context</artifactId>
+                <version>${revision}</version>
+            </dependency>
+            <dependency>
+                <groupId>${project.groupId}</groupId>
+                <artifactId>nacos-embedded-webserver</artifactId>
+                <version>${revision}</version>
+            </dependency>
 
         </dependencies>
     </dependencyManagement>
@@ -282,7 +318,7 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>flatten-maven-plugin</artifactId>
-                <version>1.1.0</version>
+                <version>1.6.0</version>
                 <configuration>
                     <updatePomFile>true</updatePomFile>
                     <flattenMode>resolveCiFriendliesOnly</flattenMode>
@@ -362,6 +398,11 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-war-plugin</artifactId>
+                <version>3.4.0</version>
+            </plugin>
         </plugins>
     </build>