support spring.cloud.nacos.config.enabled

spring-cloud-alibaba-nacos-config/src/main/java/org/springframework/cloud/alibaba/nacos/NacosConfigBootstrapConfiguration.java

@@ -17,6 +17,7 @@
 package org.springframework.cloud.alibaba.nacos;
 
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.cloud.alibaba.nacos.client.NacosPropertySourceLocator;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -27,15 +28,17 @@ import org.springframework.context.annotation.Configuration;
 @Configuration
 public class NacosConfigBootstrapConfiguration {
 
-	@Bean
-	public NacosPropertySourceLocator nacosPropertySourceLocator() {
-		return new NacosPropertySourceLocator();
-	}
-
 	@Bean
 	@ConditionalOnMissingBean
 	public NacosConfigProperties nacosConfigProperties() {
 		return new NacosConfigProperties();
 	}
 
+	@Bean
+	@ConditionalOnProperty(name = "spring.cloud.nacos.config.enabled", matchIfMissing = true)
+	public NacosPropertySourceLocator nacosPropertySourceLocator(
+			NacosConfigProperties nacosConfigProperties) {
+		return new NacosPropertySourceLocator(nacosConfigProperties);
+	}
+
 }

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

@@ -18,6 +18,7 @@ package org.springframework.cloud.alibaba.nacos;
 
 import com.alibaba.nacos.api.NacosFactory;
 import com.alibaba.nacos.api.config.ConfigService;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -44,9 +45,14 @@ public class NacosConfigProperties {
 
 	public static final String PREFIX = "spring.cloud.nacos.config";
 
-	private static final Logger LOGGER = LoggerFactory
+	private static final Logger log = LoggerFactory
 			.getLogger(NacosConfigProperties.class);
 
+	/**
+	 * whether to enable nacos config.
+	 */
+	private boolean enabled = true;
+
 	/**
 	 * nacos config server address
 	 */
@@ -137,11 +143,15 @@ public class NacosConfigProperties {
 		this.activeProfiles = environment.getActiveProfiles();
 	}
 
-	public void setActiveProfiles(String[] activeProfiles) {
+	// todo sts support
-		this.activeProfiles = activeProfiles;
+
+	public boolean isEnabled() {
+		return enabled;
 	}
 
-	// todo sts support
+	public void setEnabled(boolean enabled) {
+		this.enabled = enabled;
+	}
 
 	public String getServerAddr() {
 		return serverAddr;
@@ -243,10 +253,6 @@ public class NacosConfigProperties {
 		return name;
 	}
 
-	public void setName(String name) {
-		this.name = name;
-	}
-
 	public String[] getActiveProfiles() {
 		return activeProfiles;
 	}
@@ -275,6 +281,14 @@ public class NacosConfigProperties {
 		this.extConfig = extConfig;
 	}
 
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public void setActiveProfiles(String[] activeProfiles) {
+		this.activeProfiles = activeProfiles;
+	}
+
 	public static class Config {
 		/**
 		 * the data id of extended configuration
@@ -316,16 +330,17 @@ public class NacosConfigProperties {
 
 	@Override
 	public String toString() {
-		return "NacosConfigProperties{" + "serverAddr='" + serverAddr + '\''
+		return "NacosConfigProperties{" + "enabled=" + enabled + ", serverAddr='"
-				+ ", encode='" + encode + '\'' + ", group='" + group + '\''
+				+ serverAddr + '\'' + ", encode='" + encode + '\'' + ", group='" + group
-				+ ", sharedDataids='" + this.sharedDataids + '\''
+				+ '\'' + ", prefix='" + prefix + '\'' + ", fileExtension='"
-				+ ", refreshableDataids='" + this.refreshableDataids + '\'' + ", prefix='"
+				+ fileExtension + '\'' + ", timeout=" + timeout + ", endpoint='"
-				+ prefix + '\'' + ", fileExtension='" + fileExtension + '\''
+				+ endpoint + '\'' + ", namespace='" + namespace + '\'' + ", accessKey='"
-				+ ", timeout=" + timeout + ", endpoint='" + endpoint + '\''
+				+ accessKey + '\'' + ", secretKey='" + secretKey + '\''
-				+ ", namespace='" + namespace + '\'' + ", accessKey='" + accessKey + '\''
+				+ ", contextPath='" + contextPath + '\'' + ", clusterName='" + clusterName
-				+ ", secretKey='" + secretKey + '\'' + ", contextPath='" + contextPath
+				+ '\'' + ", name='" + name + '\'' + ", activeProfiles="
-				+ '\'' + ", clusterName='" + clusterName + '\'' + ", name='" + name + '\''
+				+ Arrays.toString(activeProfiles) + ", sharedDataids='" + sharedDataids
-				+ ", activeProfiles=" + Arrays.toString(activeProfiles) + '}';
+				+ '\'' + ", refreshableDataids='" + refreshableDataids + '\''
+				+ ", extConfig=" + extConfig + '}';
 	}
 
 	public ConfigService configServiceInstance() {
@@ -348,7 +363,7 @@ public class NacosConfigProperties {
 			return configService;
 		}
 		catch (Exception e) {
-			LOGGER.error("create config service error!properties={},e=,", this, e);
+			log.error("create config service error!properties={},e=,", this, e);
 			return null;
 		}
 	}

spring-cloud-alibaba-nacos-config/src/main/java/org/springframework/cloud/alibaba/nacos/client/NacosPropertySourceBuilder.java

@@ -33,7 +33,7 @@ import java.util.*;
  * @author pbting
  */
 public class NacosPropertySourceBuilder {
-	private static final Logger LOGGER = LoggerFactory
+	private static final Logger log = LoggerFactory
 			.getLogger(NacosPropertySourceBuilder.class);
 	private static final Properties EMPTY_PROPERTIES = new Properties();
 
@@ -68,9 +68,6 @@ public class NacosPropertySourceBuilder {
 	NacosPropertySource build(String dataId, String group, String fileExtension,
 			boolean isRefreshable) {
 		Properties p = loadNacosData(dataId, group, fileExtension);
-		if (p == null) {
-			p = EMPTY_PROPERTIES;
-		}
 		NacosPropertySource nacosPropertySource = new NacosPropertySource(group, dataId,
 				propertiesToMap(p), new Date(), isRefreshable);
 		NacosPropertySourceRepository.collectNacosPropertySources(nacosPropertySource);
@@ -82,7 +79,7 @@ public class NacosPropertySourceBuilder {
 		try {
 			data = configService.getConfig(dataId, group, timeout);
 			if (!StringUtils.isEmpty(data)) {
-				LOGGER.info(String.format("Loading nacos data, dataId: '%s', group: '%s'",
+				log.info(String.format("Loading nacos data, dataId: '%s', group: '%s'",
 						dataId, group));
 
 				if (fileExtension.equalsIgnoreCase("properties")) {
@@ -101,21 +98,20 @@ public class NacosPropertySourceBuilder {
 			}
 		}
 		catch (NacosException e) {
-			LOGGER.error("get data from Nacos error,dataId:{}, ", dataId, e);
+			log.error("get data from Nacos error,dataId:{}, ", dataId, e);
 		}
 		catch (Exception e) {
-			LOGGER.error("parse data from Nacos error,dataId:{},data:{},", dataId, data,
+			log.error("parse data from Nacos error,dataId:{},data:{},", dataId, data, e);
-					e);
 		}
-		return null;
+		return EMPTY_PROPERTIES;
 	}
 
 	@SuppressWarnings("unchecked")
 	private Map<String, Object> propertiesToMap(Properties properties) {
 		Map<String, Object> result = new HashMap<>(16);
-		Enumeration<String> tmpKeys = (Enumeration<String>) properties.propertyNames();
+		Enumeration<String> keys = (Enumeration<String>) properties.propertyNames();
-		while (tmpKeys.hasMoreElements()) {
+		while (keys.hasMoreElements()) {
-			String key = tmpKeys.nextElement();
+			String key = keys.nextElement();
 			Object value = properties.getProperty(key);
 			if (value != null) {
 				result.put(key, ((String) value).trim());
@@ -126,4 +122,5 @@ public class NacosPropertySourceBuilder {
 		}
 		return result;
 	}
+
 }

spring-cloud-alibaba-nacos-config/src/main/java/org/springframework/cloud/alibaba/nacos/client/NacosPropertySourceLocator.java

@@ -19,7 +19,6 @@ package org.springframework.cloud.alibaba.nacos.client;
 import com.alibaba.nacos.api.config.ConfigService;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.cloud.alibaba.nacos.NacosConfigProperties;
 import org.springframework.cloud.alibaba.nacos.NacosPropertySourceRepository;
 import org.springframework.cloud.alibaba.nacos.refresh.NacosContextRefresher;
@@ -40,7 +39,7 @@ import java.util.List;
 @Order(0)
 public class NacosPropertySourceLocator implements PropertySourceLocator {
 
-	private static final Logger LOGGER = LoggerFactory
+	private static final Logger log = LoggerFactory
 			.getLogger(NacosPropertySourceLocator.class);
 	private static final String NACOS_PROPERTY_SOURCE_NAME = "NACOS";
 	private static final String SEP1 = "-";
@@ -49,22 +48,21 @@ public class NacosPropertySourceLocator implements PropertySourceLocator {
 	private static final List<String> SUPPORT_FILE_EXTENSION = Arrays.asList("properties",
 			"yaml", "yml");
 
-	@Autowired
+	private NacosPropertySourceBuilder nacosPropertySourceBuilder;
+
 	private NacosConfigProperties nacosConfigProperties;
 
-	public NacosPropertySourceLocator() {
+	public NacosPropertySourceLocator(NacosConfigProperties nacosConfigProperties) {
+		this.nacosConfigProperties = nacosConfigProperties;
 	}
 
-	private NacosPropertySourceBuilder nacosPropertySourceBuilder;
-
 	@Override
 	public PropertySource<?> locate(Environment env) {
 
 		ConfigService configService = nacosConfigProperties.configServiceInstance();
 
 		if (null == configService) {
-			LOGGER.warn(
+			log.warn("no instance of config service found, can't load config from nacos");
-					"no instance of config service found, can't load config from nacos");
 			return null;
 		}
 		long timeout = nacosConfigProperties.getTimeout();
@@ -167,8 +165,7 @@ public class NacosPropertySourceLocator implements PropertySourceLocator {
 	private void loadNacosDataIfPresent(final CompositePropertySource composite,
 			final String dataId, final String group, String fileExtension,
 			boolean isRefreshable) {
-
+		if (NacosContextRefresher.getRefreshCount() != 0) {
-		if (NacosContextRefresher.loadCount.get() != 0) {
 			NacosPropertySource ps;
 			if (!isRefreshable) {
 				ps = NacosPropertySourceRepository.getNacosPropertySource(dataId);
@@ -184,19 +181,23 @@ public class NacosPropertySourceLocator implements PropertySourceLocator {
 					fileExtension, isRefreshable);
 			composite.addFirstPropertySource(ps);
 		}
-
 	}
 
 	private static void checkDataIdFileExtension(String[] sharedDataIdArry) {
 		StringBuilder stringBuilder = new StringBuilder();
-		outline: for (int i = 0; i < sharedDataIdArry.length; i++) {
+		for (int i = 0; i < sharedDataIdArry.length; i++) {
+			boolean isLegal = false;
 			for (String fileExtension : SUPPORT_FILE_EXTENSION) {
 				if (sharedDataIdArry[i].indexOf(fileExtension) > 0) {
-					continue outline;
+					isLegal = true;
+					break;
 				}
 			}
+			// add tips
+			if (!isLegal) {
 				stringBuilder.append(sharedDataIdArry[i] + ",");
 			}
+		}
 
 		if (stringBuilder.length() > 0) {
 			String result = stringBuilder.substring(0, stringBuilder.length() - 1);

spring-cloud-alibaba-nacos-config/src/main/java/org/springframework/cloud/alibaba/nacos/refresh/NacosContextRefresher.java

@@ -19,6 +19,7 @@ package org.springframework.cloud.alibaba.nacos.refresh;
 import com.alibaba.nacos.api.config.ConfigService;
 import com.alibaba.nacos.api.config.listener.Listener;
 import com.alibaba.nacos.api.exception.NacosException;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.boot.context.event.ApplicationReadyEvent;
@@ -51,10 +52,10 @@ import java.util.concurrent.atomic.AtomicLong;
 public class NacosContextRefresher
 		implements ApplicationListener<ApplicationReadyEvent>, ApplicationContextAware {
 
-	private final static Logger LOGGER = LoggerFactory
+	private final static Logger log = LoggerFactory
 			.getLogger(NacosContextRefresher.class);
 
-	public static final AtomicLong loadCount = new AtomicLong(0);
+	private static final AtomicLong REFRESH_COUNT = new AtomicLong(0);
 
 	private final NacosRefreshProperties refreshProperties;
 
@@ -110,7 +111,7 @@ public class NacosContextRefresher
 			listener = new Listener() {
 				@Override
 				public void receiveConfigInfo(String configInfo) {
-					loadCount.incrementAndGet();
+					refreshCountIncrement();
 					String md5 = "";
 					if (!StringUtils.isEmpty(configInfo)) {
 						try {
@@ -120,16 +121,15 @@ public class NacosContextRefresher
 						}
 						catch (NoSuchAlgorithmException
 								| UnsupportedEncodingException e) {
-							LOGGER.warn("[Nacos] unable to get md5 for dataId: " + dataId,
+							log.warn("[Nacos] unable to get md5 for dataId: " + dataId,
 									e);
 						}
 					}
 					refreshHistory.add(dataId, md5);
 					applicationContext.publishEvent(
 							new RefreshEvent(this, null, "Refresh Nacos config"));
-					if (LOGGER.isDebugEnabled()) {
+					if (log.isDebugEnabled()) {
-						LOGGER.debug("Refresh Nacos config group{},dataId{}", group,
+						log.debug("Refresh Nacos config group{},dataId{}", group, dataId);
-								dataId);
 					}
 				}
 
@@ -149,4 +149,11 @@ public class NacosContextRefresher
 		}
 	}
 
+	public static long getRefreshCount() {
+		return REFRESH_COUNT.get();
+	}
+
+	public static void refreshCountIncrement() {
+		REFRESH_COUNT.incrementAndGet();
+	}
 }