Merge pull request #1 from alibaba/master

update

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/readme.md

@@ -193,14 +193,27 @@ Now ReadableDataSource type support 5 categories: `file`, `nacos`, `zk`, `apollo
 
 If you want to use `nacos`, `zk`, `apollo` or `redis` ReadableDataSource, you could add `sentinel-datasource-nacos`, `sentinel-datasource-zookeeper`,`sentinel-datasource-apollo` or `sentinel-datasource-redis` dependency.
 
+
+
 When ReadableDataSource load rule data successfully, console will print some logs:
 
 ```
 [Sentinel Starter] DataSource ds1-sentinel-file-datasource load 3 DegradeRule
 [Sentinel Starter] DataSource ds2-sentinel-nacos-datasource load 2 FlowRule
 ```   
+## Warning
+You should  use `file` ReadableDataSource in a fatjar carefully or you may get error like this below
+
+```
+java.lang.RuntimeException: [Sentinel Starter] DataSource ds1 handle file [classpath: flowrule.json] error: class path resource [flowrule.json] cannot be resolved to absolute file path because it does not reside in the file system: jar:file:xxx/xxx.jar!/BOOT-INF/classes!/flowrule.jso
+```
+
+You could use absolute path when you use File datasource & fat jar.
+It is recommended to use Nacos/Apollo/Zookeeper/Redis datasource to store rules.
+
+https://github.com/alibaba/spring-cloud-alibaba/issues/428
 
 ## More
 For more information about Sentinel, see [Sentinel Project](https://github.com/alibaba/Sentinel).
 
-If you have any ideas or suggestions for Spring Cloud Sentinel starter, please don't hesitate to tell us by submitting github issues.
+If you have any ideas or suggestions for Spring Cloud Sentinel starter, please don't hesitate to tell us by submitting github issues.

spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigProperties.java

@@ -22,6 +22,7 @@ import java.util.Properties;
 
 import javax.annotation.PostConstruct;
 
+import com.alibaba.cloud.nacos.diagnostics.analyzer.NacosConnectionFailureException;
 import com.alibaba.nacos.api.NacosFactory;
 import com.alibaba.nacos.api.config.ConfigService;
 import com.alibaba.nacos.api.exception.NacosException;
@@ -367,8 +368,8 @@ public class NacosConfigProperties {
 						.createConfigService(getConfigServiceProperties());
 			}
 			catch (NacosException e) {
-				log.error("create naming service error!properties={},e=,", this, e);
-				return null;
+				throw new NacosConnectionFailureException(this.getServerAddr(),
+						e.getMessage(), e);
 			}
 		}
 		return configService;

spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/parser/AbstractNacosDataParser.java

@@ -21,7 +21,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Properties;
 
-import com.alibaba.nacos.client.utils.StringUtils;
+import org.springframework.util.StringUtils;
 
 /**
  * @author zkz
@@ -118,7 +118,7 @@ public abstract class AbstractNacosDataParser {
 		Properties properties = new Properties();
 		for (Map.Entry<String, String> entry : map.entrySet()) {
 			String key = entry.getKey();
-			if (StringUtils.isBlank(key)) {
+			if (StringUtils.isEmpty(key)) {
 				continue;
 			}
 			key = key.startsWith(DOT) ? key.replaceFirst("\\.", "") : key;

spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/parser/NacosDataJsonParser.java

@@ -22,10 +22,11 @@ import java.util.Iterator;
 import java.util.Map;
 import java.util.Properties;
 
-import com.alibaba.nacos.client.utils.StringUtils;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
+import org.springframework.util.StringUtils;
+
 /**
  * @author zkz
  */

spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/parser/NacosDataXmlParser.java

@@ -25,13 +25,14 @@ import java.util.Properties;
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 
-import com.alibaba.nacos.client.utils.StringUtils;
 import org.w3c.dom.Document;
 import org.w3c.dom.NamedNodeMap;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 import org.xml.sax.InputSource;
 
+import org.springframework.util.StringUtils;
+
 /**
  * With relatively few usage scenarios, only simple parsing is performed to reduce jar
  * dependencies.

spring-cloud-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/NacosDiscoveryProperties.java

@@ -465,7 +465,6 @@ public class NacosDiscoveryProperties {
 		}
 	}
 
-	@Deprecated
 	public NamingService namingServiceInstance() {
 
 		if (null != namingService) {

spring-cloud-alibaba-sentinel/src/main/java/com/alibaba/cloud/sentinel/custom/SentinelBeanPostProcessor.java

@@ -66,7 +66,7 @@ public class SentinelBeanPostProcessor implements MergedBeanDefinitionPostProces
 	@Override
 	public void postProcessMergedBeanDefinition(RootBeanDefinition beanDefinition,
 			Class<?> beanType, String beanName) {
-		if (checkSentinelProtect(beanDefinition, beanType)) {
+		if (checkSentinelProtect(beanDefinition, beanType, beanName)) {
 			SentinelRestTemplate sentinelRestTemplate;
 			if (beanDefinition.getSource() instanceof StandardMethodMetadata) {
 				sentinelRestTemplate = ((StandardMethodMetadata) beanDefinition
@@ -166,8 +166,8 @@ public class SentinelBeanPostProcessor implements MergedBeanDefinitionPostProces
 	}
 
 	private boolean checkSentinelProtect(RootBeanDefinition beanDefinition,
-			Class<?> beanType) {
-		return beanType == RestTemplate.class
+			Class<?> beanType, String beanName) {
+		return beanName != null && beanType == RestTemplate.class
 				&& checkMethodMetadataReadingVisitor(beanDefinition);
 	}
 
@@ -180,7 +180,7 @@ public class SentinelBeanPostProcessor implements MergedBeanDefinitionPostProces
 	@Override
 	public Object postProcessAfterInitialization(Object bean, String beanName)
 			throws BeansException {
-		if (cache.containsKey(beanName)) {
+		if (beanName != null && cache.containsKey(beanName)) {
 			// add interceptor for each RestTemplate with @SentinelRestTemplate annotation
 			StringBuilder interceptorBeanNamePrefix = new StringBuilder();
 			SentinelRestTemplate sentinelRestTemplate = cache.get(beanName);