add module nacos-config and nacos-discovery

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

@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos;
+
+import com.alibaba.nacos.api.config.ConfigService;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cloud.alibaba.nacos.refresh.NacosContextRefresher;
+import org.springframework.cloud.alibaba.nacos.refresh.NacosRefreshHistory;
+import org.springframework.cloud.alibaba.nacos.refresh.NacosRefreshProperties;
+import org.springframework.cloud.context.refresh.ContextRefresher;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * @author juven.xuxb
+ */
+@Configuration
+public class NacosConfigAutoConfiguration implements ApplicationContextAware {
+
+	private ApplicationContext applicationContext;
+
+	@Autowired
+	private NacosConfigProperties nacosConfigProperties;
+
+	@Autowired
+	private NacosRefreshProperties nacosRefreshProperties;
+
+	@Autowired
+	private ConfigService configService;
+
+	@Bean
+	public NacosConfigProperties nacosConfigProperties() {
+		return new NacosConfigProperties();
+	}
+
+	@Bean
+	public NacosPropertySourceRepository nacosPropertySourceRepository() {
+		return new NacosPropertySourceRepository(applicationContext);
+	}
+
+	@Bean
+	public NacosRefreshProperties nacosRefreshProperties() {
+		return new NacosRefreshProperties();
+	}
+
+	@Bean
+	public NacosRefreshHistory nacosRefreshHistory() {
+		return new NacosRefreshHistory();
+	}
+
+	@Bean
+	public NacosContextRefresher nacosContextRefresher(ContextRefresher contextRefresher,
+			NacosRefreshHistory refreshHistory,
+			NacosPropertySourceRepository propertySourceRepository,
+													   ConfigService configService) {
+		return new NacosContextRefresher(contextRefresher, nacosConfigProperties,
+				nacosRefreshProperties, refreshHistory, propertySourceRepository,configService);
+	}
+
+	@Override
+	public void setApplicationContext(ApplicationContext applicationContext)
+			throws BeansException {
+		this.applicationContext = applicationContext;
+	}
+}

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

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos;
+
+import org.springframework.cloud.alibaba.nacos.client.NacosPropertySourceLocator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * @author xiaojing
+ */
+@Configuration
+public class NacosConfigBootstrapConfiguration {
+
+	@Bean
+	public NacosPropertySourceLocator nacosPropertySourceLocator() {
+		return new NacosPropertySourceLocator();
+	}
+
+	@Bean
+	public NacosConfigProperties nacosConfigProperties() {
+		return new NacosConfigProperties();
+	}
+}

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

@@ -0,0 +1,237 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.core.env.Environment;
+import org.springframework.util.StringUtils;
+
+/**
+ * nacos properties
+ *
+ * @author leijuan
+ * @author xiaojing
+ */
+@ConfigurationProperties("spring.cloud.nacos.config")
+public class NacosConfigProperties {
+
+	/**
+	 * nacos config server address
+	 */
+	private String serverAddr;
+
+	/**
+	 * nacos config encode
+	 */
+	private String encode;
+
+	/**
+	 * nacos config group
+	 */
+	private String group = "DEFAULT_GROUP";
+
+	/**
+	 * nacos config dataId prefix
+	 */
+	private String prefix;
+	/**
+	 * nacos config dataId contentType
+	 */
+	private String contentType = "properties";
+
+	/**
+	 * timeout to get configuration
+	 */
+	private int timeout;
+
+	/**
+	 *  endpoint for Nacos
+	 */
+	private String endpoint;
+
+	/**
+	 * Nacos namespace
+	 */
+	private String namespace;
+
+	/**
+	 * Nacos access key
+	 */
+	private String accessKey;
+
+	/**
+	 * Nacos secret key
+	 */
+	private String secretKey;
+
+	/**
+	 * nacos config context path
+	 */
+	private String contextPath;
+
+	/**
+	 * nacos config cluster name
+	 */
+	private String clusterName;
+
+	//todo sts support
+
+	public String getServerAddr() {
+		return serverAddr;
+	}
+
+	public void setServerAddr(String serverAddr) {
+		this.serverAddr = serverAddr;
+	}
+
+	public String getPrefix() {
+		return prefix;
+	}
+
+	public void setPrefix(String prefix) {
+		this.prefix = prefix;
+	}
+
+	public String getContentType() {
+		return contentType;
+	}
+
+	public void setContentType(String contentType) {
+		this.contentType = contentType;
+	}
+
+	public String getGroup() {
+		return group;
+	}
+
+	public void setGroup(String group) {
+		this.group = group;
+	}
+
+	public int getTimeout() {
+		return timeout;
+	}
+
+	public void setTimeout(int timeout) {
+		this.timeout = timeout;
+	}
+
+	public String getEndpoint() {
+		return endpoint;
+	}
+
+	public void setEndpoint(String endpoint) {
+		this.endpoint = endpoint;
+	}
+
+	public String getNamespace() {
+		return namespace;
+	}
+
+	public void setNamespace(String namespace) {
+		this.namespace = namespace;
+	}
+
+	public String getAccessKey() {
+		return accessKey;
+	}
+
+	public void setAccessKey(String accessKey) {
+		this.accessKey = accessKey;
+	}
+
+	public String getSecretKey() {
+		return secretKey;
+	}
+
+	public void setSecretKey(String secretKey) {
+		this.secretKey = secretKey;
+	}
+
+	public String getEncode() {
+		return encode;
+	}
+
+	public void setEncode(String encode) {
+		this.encode = encode;
+	}
+
+	public String getContextPath() {
+		return contextPath;
+	}
+
+	public void setContextPath(String contextPath) {
+		this.contextPath = contextPath;
+	}
+
+	public String getClusterName() {
+		return clusterName;
+	}
+
+	public void setClusterName(String clusterName) {
+		this.clusterName = clusterName;
+	}
+
+	@Override
+	public String toString() {
+		return "NacosConfigProperties{" +
+			"serverAddr='" + serverAddr + '\'' +
+			", encode='" + encode + '\'' +
+			", group='" + group + '\'' +
+			", prefix='" + prefix + '\'' +
+			", contentType='" + contentType + '\'' +
+			", timeout=" + timeout +
+			", endpoint='" + endpoint + '\'' +
+			", namespace='" + namespace + '\'' +
+			", accessKey='" + accessKey + '\'' +
+			", secretKey='" + secretKey + '\'' +
+			", contextPath='" + contextPath + '\'' +
+			", clusterName='" + clusterName + '\'' +
+			'}';
+	}
+
+	public void overrideFromEnv(Environment env){
+
+		if(StringUtils.isEmpty(this.getServerAddr())) {
+			this.setServerAddr(env.resolvePlaceholders("${spring.cloud.nacos.config.server-addr:}"));
+		}
+		if(StringUtils.isEmpty(this.getEncode())) {
+			this.setEncode(env.resolvePlaceholders("${spring.cloud.nacos.config.encode:}"));
+		}
+		if(StringUtils.isEmpty(this.getNamespace())) {
+			this.setNamespace(env.resolvePlaceholders("${spring.cloud.nacos.config.namespace:}"));
+		}
+		if(StringUtils.isEmpty(this.getAccessKey())) {
+			this.setAccessKey(env.resolvePlaceholders("${spring.cloud.nacos.config.access-key:}"));
+		}
+		if(StringUtils.isEmpty(this.getSecretKey())) {
+			this.setSecretKey(env.resolvePlaceholders("${spring.cloud.nacos.config.secret-key:}"));
+		}
+		if(StringUtils.isEmpty(this.getContextPath())) {
+			this.setContextPath(env.resolvePlaceholders("${spring.cloud.nacos.config.context-path:}"));
+		}
+		if(StringUtils.isEmpty(this.getClusterName())) {
+			this.setClusterName(env.resolvePlaceholders("${spring.cloud.nacos.config.cluster-name:}"));
+		}
+		if(StringUtils.isEmpty(this.getEndpoint())) {
+			this.setEndpoint(env.resolvePlaceholders("${spring.cloud.nacos.config.endpoint:}"));
+		}
+		if(StringUtils.isEmpty(this.getPrefix())) {
+			this.setPrefix(env.resolvePlaceholders("${spring.cloud.nacos.config.prefix:}"));
+		}
+	}
+}

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

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.cloud.alibaba.nacos.client.NacosPropertySource;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.env.CompositePropertySource;
+import org.springframework.core.env.PropertySource;
+
+/**
+ * @author xiaojing
+ */
+public class NacosPropertySourceRepository {
+
+	private final ApplicationContext applicationContext;
+
+	public NacosPropertySourceRepository(ApplicationContext applicationContext) {
+		this.applicationContext = applicationContext;
+	}
+
+	/**
+	 * @return all nacos properties from application context
+	 */
+	public List<NacosPropertySource> getAll() {
+		List<NacosPropertySource> result = new ArrayList<>();
+		ConfigurableApplicationContext ctx = (ConfigurableApplicationContext) applicationContext;
+		for (PropertySource p : ctx.getEnvironment().getPropertySources()) {
+			if (p instanceof NacosPropertySource) {
+				result.add((NacosPropertySource) p);
+			}
+			else if (p instanceof CompositePropertySource) {
+				collectNacosPropertySources((CompositePropertySource) p, result);
+			}
+		}
+		return result;
+	}
+
+	private void collectNacosPropertySources(CompositePropertySource composite,
+											 List<NacosPropertySource> result) {
+		for (PropertySource p : composite.getPropertySources()) {
+			if (p instanceof NacosPropertySource) {
+				result.add((NacosPropertySource) p);
+			}
+			else if (p instanceof CompositePropertySource) {
+				collectNacosPropertySources((CompositePropertySource) p, result);
+			}
+		}
+	}
+}

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

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.client;
+
+import java.util.Date;
+import java.util.Map;
+
+import org.springframework.core.env.MapPropertySource;
+
+/**
+ * @author xiaojing
+ */
+public class NacosPropertySource extends MapPropertySource {
+
+	/**
+	 * Nacos dataID
+	 */
+	private final String dataId;
+
+	/**
+	 * timestamp the property get
+	 */
+	private final Date timestamp;
+
+
+	NacosPropertySource(String dataId, Map<String, Object> source, Date timestamp) {
+		super(dataId, source);
+		this.dataId = dataId;
+		this.timestamp = timestamp;
+	}
+
+	public String getDataId() {
+		return dataId;
+	}
+
+	public Date getTimestamp() {
+		return timestamp;
+	}
+
+}

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

@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.client;
+
+import java.io.StringReader;
+import java.util.Date;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Properties;
+
+import com.alibaba.nacos.api.config.ConfigService;
+import com.alibaba.nacos.api.exception.NacosException;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.util.StringUtils;
+
+/**
+ * @author xiaojing
+ */
+public class NacosPropertySourceBuilder {
+
+	private static final Logger logger = LoggerFactory
+			.getLogger(NacosPropertySourceBuilder.class);
+
+	private ConfigService configService;
+	private long timeout;
+
+	public NacosPropertySourceBuilder() {
+	}
+
+	public NacosPropertySourceBuilder(ConfigService configService, long timeout) {
+		this.configService = configService;
+		this.timeout = timeout;
+	}
+
+	public long getTimeout() {
+		return timeout;
+	}
+
+	public void setTimeout(long timeout) {
+		this.timeout = timeout;
+	}
+
+	public ConfigService getConfigService() {
+		return configService;
+	}
+
+	public void setConfigService(ConfigService configService) {
+		this.configService = configService;
+	}
+
+	/**
+	 * @param dataId Nacos dataId
+	 * @param group Nacos group
+	 */
+	NacosPropertySource build(String dataId, String group, String contentType) {
+		Properties p = loadNacosData(dataId, group, contentType);
+		if (p == null) {
+			return null;
+		}
+		return new NacosPropertySource(dataId, propertiesToMap(p), new Date());
+	}
+
+	private Properties loadNacosData(String dataId, String group, String contentType) {
+		String data = null;
+		try {
+			data = configService.getConfig(dataId, group, timeout);
+			// todo add content type yaml support
+			if (!StringUtils.isEmpty(data)) {
+				Properties properties = new Properties();
+				logger.info(String.format("Loading nacos data, dataId: '%s', group: '%s'",
+						dataId, group));
+				properties.load(new StringReader(data));
+				return properties;
+			}
+		}
+		catch (NacosException e) {
+			logger.error("get data from Nacos error,dataId:{}, ", dataId, e);
+		}
+		catch (Exception e) {
+			logger.error("parse data from Nacos error,dataId:{},data:{},", dataId, data,
+					e);
+		}
+		return null;
+	}
+
+	@SuppressWarnings("unchecked")
+	private Map<String, Object> propertiesToMap(Properties properties) {
+		Map<String, Object> result = new HashMap<>(16);
+		Enumeration<String> keys = (Enumeration<String>) properties.propertyNames();
+		while (keys.hasMoreElements()) {
+			String key = keys.nextElement();
+			Object value = properties.getProperty(key);
+			if (value != null) {
+				result.put(key, ((String) value).trim());
+			}
+			else {
+				result.put(key, null);
+			}
+		}
+		return result;
+	}
+}

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

@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.client;
+
+
+import java.util.Properties;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
+import org.springframework.cloud.alibaba.nacos.NacosConfigProperties;
+import org.springframework.cloud.bootstrap.config.PropertySourceLocator;
+import org.springframework.core.annotation.Order;
+import org.springframework.core.env.CompositePropertySource;
+import org.springframework.core.env.Environment;
+import org.springframework.core.env.PropertySource;
+import org.springframework.util.StringUtils;
+
+import com.alibaba.nacos.api.NacosFactory;
+import com.alibaba.nacos.api.config.ConfigService;
+import com.alibaba.nacos.api.exception.NacosException;
+
+import static com.alibaba.nacos.api.PropertyKeyConst.*;
+
+/**
+ * @author xiaojing
+ */
+@Order(0)
+public class NacosPropertySourceLocator implements PropertySourceLocator {
+
+	private static final Logger logger = LoggerFactory
+			.getLogger(NacosPropertySourceLocator.class);
+	private static final String NACOS_PROPERTY_SOURCE_NAME = "NACOS";
+	private static final String SEP1 = "-";
+	private static final String DOT = ".";
+
+	@Autowired
+	private ConfigurableListableBeanFactory beanFactory;
+
+	@Autowired
+	private NacosConfigProperties nacosConfigProperties;
+
+	private ConfigService configService;
+
+	private NacosPropertySourceBuilder nacosPropertySourceBuilder;
+
+	private Properties getPropertiesFromEnv(Environment env) {
+
+		nacosConfigProperties.overrideFromEnv(env);
+
+		Properties properties = new Properties();
+		properties.put(SERVER_ADDR, nacosConfigProperties.getServerAddr());
+		properties.put(ENCODE, nacosConfigProperties.getEncode());
+		properties.put(NAMESPACE, nacosConfigProperties.getNamespace());
+		properties.put(ACCESS_KEY, nacosConfigProperties.getAccessKey());
+		properties.put(SECRET_KEY, nacosConfigProperties.getSecretKey());
+		properties.put(CONTEXT_PATH, nacosConfigProperties.getContextPath());
+		properties.put(CLUSTER_NAME, nacosConfigProperties.getClusterName());
+		properties.put(ENDPOINT, nacosConfigProperties.getEndpoint());
+		return properties;
+	}
+
+	@Override
+	public PropertySource<?> locate(Environment env) {
+
+		Properties properties = getPropertiesFromEnv(env);
+
+		try {
+			configService =  NacosFactory.createConfigService(properties);
+		}
+		catch (NacosException e) {
+			// todo 为什么这里是 checkException，什么时候会抛出，什么时候需要关心
+			logger.error("create config service error, nacosConfigProperties:{}, ", properties, e);
+			return null;
+		}
+		
+		beanFactory.registerSingleton("configService", configService);
+
+		if (null == configService) {
+			logger.warn(
+					"no instance of config service found, can't load config from nacos");
+			return null;
+		}
+		long timeout = nacosConfigProperties.getTimeout();
+		nacosPropertySourceBuilder = new NacosPropertySourceBuilder(configService, timeout);
+
+		String applicationName = env.getProperty("spring.application.name");
+		logger.info("Initialize spring.application.name '" + applicationName + "'.");
+
+		String nacosGroup = nacosConfigProperties.getGroup();
+		String dataIdPrefix = nacosConfigProperties.getPrefix();
+		if (StringUtils.isEmpty(dataIdPrefix)) {
+			dataIdPrefix = applicationName;
+		}
+
+		String contentType = nacosConfigProperties.getContentType();
+
+		CompositePropertySource composite = new CompositePropertySource(
+				NACOS_PROPERTY_SOURCE_NAME);
+
+		loadApplicationConfiguration(composite, env, nacosGroup, dataIdPrefix, contentType);
+
+		return composite;
+	}
+
+	private void loadApplicationConfiguration(
+			CompositePropertySource compositePropertySource, Environment environment,
+			String nacosGroup, String dataIdPrefix, String contentType) {
+		loadNacosDataIfPresent(compositePropertySource, dataIdPrefix + DOT + contentType,
+				nacosGroup, contentType);
+		for (String profile : environment.getActiveProfiles()) {
+			String dataId = dataIdPrefix + SEP1 + profile + DOT + contentType;
+			loadNacosDataIfPresent(compositePropertySource, dataId, nacosGroup,
+					contentType);
+		}
+		// todo multi profile active order and priority
+	}
+
+	private void loadNacosDataIfPresent(final CompositePropertySource composite,
+			final String dataId, final String group,String contentType) {
+		NacosPropertySource ps = nacosPropertySourceBuilder.build(dataId, group, contentType);
+		if (ps != null) {
+			composite.addFirstPropertySource(ps);
+		}
+	}
+}

spring-cloud-alibaba-nacos-config/src/main/java/org/springframework/cloud/alibaba/nacos/diagnostics/analyzer/NacosConnectionFailureAnalyzer.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.diagnostics.analyzer;
+
+import org.springframework.boot.diagnostics.AbstractFailureAnalyzer;
+import org.springframework.boot.diagnostics.FailureAnalysis;
+
+/**
+ * A {@code FailureAnalyzer} that performs analysis of failures caused by a
+ * {@code NacosConnectionFailureException}.
+ *
+ * @author juven.xuxb
+ */
+public class NacosConnectionFailureAnalyzer
+		extends AbstractFailureAnalyzer<NacosConnectionFailureException> {
+
+	@Override
+	protected FailureAnalysis analyze(Throwable rootFailure,
+			NacosConnectionFailureException cause) {
+		return new FailureAnalysis("Application failed to connect to Nacos server",
+				"check your nacos server config", cause);
+	}
+}

spring-cloud-alibaba-nacos-config/src/main/java/org/springframework/cloud/alibaba/nacos/diagnostics/analyzer/NacosConnectionFailureException.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.diagnostics.analyzer;
+
+/**
+ * A {@code NacosConnectionFailureException} is thrown when the application fails to connect
+ * to Nacos Server.
+ *
+ * @author juven.xuxb
+ */
+public class NacosConnectionFailureException extends RuntimeException {
+
+	private final String domain;
+
+	private final String port;
+
+	public NacosConnectionFailureException(String domain, String port, String message) {
+		super(message);
+		this.domain = domain;
+		this.port = port;
+	}
+
+	public NacosConnectionFailureException(String domain, String port, String message,
+										   Throwable cause) {
+		super(message, cause);
+		this.domain = domain;
+		this.port = port;
+	}
+
+	String getDomain() {
+		return domain;
+	}
+
+	String getPort() {
+		return port;
+	}
+
+}

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

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.endpoint;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
+import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
+import org.springframework.cloud.alibaba.nacos.NacosConfigProperties;
+import org.springframework.cloud.alibaba.nacos.NacosPropertySourceRepository;
+import org.springframework.cloud.alibaba.nacos.client.NacosPropertySource;
+import org.springframework.cloud.alibaba.nacos.refresh.NacosRefreshHistory;
+
+/**
+ * Endpoint for Nacos, contains config data and refresh history
+ * @author xiaojing
+ */
+@Endpoint(id = "nacos-config")
+public class NacosConfigEndpoint {
+
+	private final NacosConfigProperties properties;
+
+	private final NacosRefreshHistory refreshHistory;
+
+	private final NacosPropertySourceRepository propertySourceRepository;
+
+	private DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+
+	public NacosConfigEndpoint(NacosConfigProperties properties, NacosRefreshHistory refreshHistory,
+							   NacosPropertySourceRepository propertySourceRepository) {
+		this.properties = properties;
+		this.refreshHistory = refreshHistory;
+		this.propertySourceRepository = propertySourceRepository;
+	}
+
+	@ReadOperation
+	public Map<String, Object> invoke() {
+		Map<String, Object> result = new HashMap<>(16);
+		result.put("NacosConfigProperties", properties);
+
+		List<NacosPropertySource> all = propertySourceRepository.getAll();
+
+		List<Map<String, Object>> sources = new ArrayList<>();
+		for (NacosPropertySource ps : all) {
+			Map<String, Object> source = new HashMap<>(16);
+			source.put("dataId", ps.getDataId());
+			source.put("lastSynced", dateFormat.format(ps.getTimestamp()));
+			sources.add(source);
+		}
+		result.put("Sources", sources);
+		result.put("RefreshHistory", refreshHistory.getRecords());
+
+		return result;
+	}
+}

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

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.endpoint;
+
+import com.alibaba.nacos.api.config.ConfigService;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.actuate.autoconfigure.endpoint.condition.ConditionalOnEnabledEndpoint;
+import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.cloud.alibaba.nacos.NacosConfigProperties;
+import org.springframework.cloud.alibaba.nacos.NacosPropertySourceRepository;
+import org.springframework.cloud.alibaba.nacos.refresh.NacosRefreshHistory;
+import org.springframework.context.annotation.Bean;
+
+/**
+ * @author xiaojing
+ */
+@ConditionalOnWebApplication
+@ConditionalOnClass(value = Endpoint.class)
+public class NacosConfigEndpointAutoConfiguration {
+
+	@Autowired
+	private NacosConfigProperties nacosConfigProperties;
+
+	@Autowired
+	private NacosRefreshHistory nacosRefreshHistory;
+
+	@Autowired
+	private NacosPropertySourceRepository nacosPropertySourceRepository;
+
+	@Autowired
+	private ConfigService configService;
+
+	@Bean
+	@ConditionalOnBean
+	public NacosConfigProperties nacosConfigProperties() {
+		return new NacosConfigProperties();
+	}
+
+	@ConditionalOnMissingBean
+	@ConditionalOnEnabledEndpoint
+	@Bean
+	public NacosConfigEndpoint nacosConfigEndpoint() {
+		return new NacosConfigEndpoint(nacosConfigProperties, nacosRefreshHistory,
+				nacosPropertySourceRepository);
+	}
+
+	@Bean
+	public NacosConfigHealthIndicator nacosConfigHealthIndicator(
+			NacosPropertySourceRepository nacosPropertySourceRepository) {
+		return new NacosConfigHealthIndicator(nacosConfigProperties,
+				nacosPropertySourceRepository, configService);
+	}
+}

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

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.endpoint;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.alibaba.nacos.api.config.ConfigService;
+
+import org.springframework.boot.actuate.health.AbstractHealthIndicator;
+import org.springframework.boot.actuate.health.Health;
+import org.springframework.cloud.alibaba.nacos.NacosConfigProperties;
+import org.springframework.cloud.alibaba.nacos.NacosPropertySourceRepository;
+import org.springframework.cloud.alibaba.nacos.client.NacosPropertySource;
+import org.springframework.util.StringUtils;
+
+/**
+ * @author xiaojing
+ */
+public class NacosConfigHealthIndicator extends AbstractHealthIndicator {
+
+	private final NacosConfigProperties nacosConfigProperties;
+
+	private final NacosPropertySourceRepository nacosPropertySourceRepository;
+
+	private final List<String> dataIds;
+
+	private final ConfigService configService;
+
+	public NacosConfigHealthIndicator(NacosConfigProperties nacosConfigProperties,
+			NacosPropertySourceRepository nacosPropertySourceRepository,
+			ConfigService configService) {
+		this.nacosConfigProperties = nacosConfigProperties;
+		this.nacosPropertySourceRepository = nacosPropertySourceRepository;
+		this.configService = configService;
+
+		this.dataIds = new ArrayList<>();
+		for (NacosPropertySource nacosPropertySource : this.nacosPropertySourceRepository
+				.getAll()) {
+			this.dataIds.add(nacosPropertySource.getDataId());
+		}
+	}
+
+	@Override
+	protected void doHealthCheck(Health.Builder builder) throws Exception {
+		for (String dataId : dataIds) {
+			try {
+				String config = configService.getConfig(dataId,
+						nacosConfigProperties.getGroup(),
+						nacosConfigProperties.getTimeout());
+				if (StringUtils.isEmpty(config)) {
+					builder.down().withDetail(String.format("dataId: '%s', group: '%s'",
+							dataId, nacosConfigProperties.getGroup()), "config is empty");
+				}
+			}
+			catch (Exception e) {
+				builder.down().withDetail(String.format("dataId: '%s', group: '%s'",
+						dataId, nacosConfigProperties.getGroup()), e.getMessage());
+			}
+		}
+		builder.up().withDetail("dataIds", dataIds);
+	}
+}

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

@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.refresh;
+
+import java.io.UnsupportedEncodingException;
+import java.math.BigInteger;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Executor;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.cloud.alibaba.nacos.NacosConfigProperties;
+import org.springframework.cloud.alibaba.nacos.NacosPropertySourceRepository;
+import org.springframework.cloud.alibaba.nacos.client.NacosPropertySource;
+import org.springframework.cloud.context.refresh.ContextRefresher;
+import org.springframework.context.ApplicationListener;
+import org.springframework.util.StringUtils;
+
+import com.alibaba.nacos.api.config.ConfigService;
+import com.alibaba.nacos.api.config.listener.Listener;
+import com.alibaba.nacos.api.exception.NacosException;
+
+/**
+ * On application start up, NacosContextRefresher add nacos listeners to all application
+ * level dataIds, when there is a change in the data, listeners will refresh
+ * configurations.
+ *
+ * @author juven.xuxb
+ */
+public class NacosContextRefresher implements ApplicationListener<ApplicationReadyEvent> {
+
+	private Logger logger = LoggerFactory.getLogger(NacosContextRefresher.class);
+
+	private final ContextRefresher contextRefresher;
+
+	private final NacosConfigProperties properties;
+
+	private final NacosRefreshProperties refreshProperties;
+
+	private final NacosRefreshHistory refreshHistory;
+
+	private final NacosPropertySourceRepository nacosPropertySourceRepository;
+
+	private final ConfigService configService;
+
+	private Map<String,Listener> listenerMap = new ConcurrentHashMap<>(16);
+
+	public NacosContextRefresher(ContextRefresher contextRefresher,
+			NacosConfigProperties properties, NacosRefreshProperties refreshProperties,
+			NacosRefreshHistory refreshHistory,
+			NacosPropertySourceRepository nacosPropertySourceRepository,
+			ConfigService configService) {
+		this.contextRefresher = contextRefresher;
+		this.properties = properties;
+		this.refreshProperties = refreshProperties;
+		this.refreshHistory = refreshHistory;
+		this.nacosPropertySourceRepository = nacosPropertySourceRepository;
+		this.configService = configService;
+	}
+
+	@Override
+	public void onApplicationEvent(ApplicationReadyEvent event) {
+		this.registerNacosListenersForApplications();
+	}
+
+	private void registerNacosListenersForApplications() {
+		if (refreshProperties.isEnabled()) {
+			for (NacosPropertySource nacosPropertySource : nacosPropertySourceRepository
+					.getAll()) {
+				String dataId = nacosPropertySource.getDataId();
+				registerNacosListener(dataId);
+			}
+		}
+	}
+
+	private void registerNacosListener(final String dataId) {
+
+		Listener listener = listenerMap.computeIfAbsent(dataId, i -> new Listener() {
+			@Override
+			public void receiveConfigInfo(String configInfo) {
+				String md5 = "";
+				if (!StringUtils.isEmpty(configInfo)) {
+					try {
+						MessageDigest md = MessageDigest.getInstance("MD5");
+						md5 = new BigInteger(1, md.digest(configInfo.getBytes("UTF-8")))
+							.toString(16);
+					} catch (NoSuchAlgorithmException | UnsupportedEncodingException e) {
+						logger.warn("unable to get md5 for dataId: " + dataId, e);
+					}
+				}
+				refreshHistory.add(dataId, md5);
+				contextRefresher.refresh();
+			}
+
+			@Override
+			public Executor getExecutor() {
+				return null;
+			}
+		});
+
+		try {
+			configService.addListener(dataId, properties.getGroup(), listener);
+		} catch (NacosException e) {
+			e.printStackTrace();
+		}
+	}
+
+}

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

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.refresh;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.LinkedList;
+
+public class NacosRefreshHistory {
+
+	private static final int MAX_SIZE = 20;
+
+	private LinkedList<Record> records = new LinkedList<>();
+
+	private DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+
+	public void add(String dataId, String md5) {
+		records.addFirst(new Record(dateFormat.format(new Date()), dataId, md5));
+		if (records.size() > MAX_SIZE) {
+			records.removeLast();
+		}
+	}
+
+	public LinkedList<Record> getRecords() {
+		return records;
+	}
+}
+
+class Record {
+
+	private final String timestamp;
+
+	private final String dataId;
+
+	private final String md5;
+
+	public Record(String timestamp, String dataId, String md5) {
+		this.timestamp = timestamp;
+		this.dataId = dataId;
+		this.md5 = md5;
+	}
+
+	public String getTimestamp() {
+		return timestamp;
+	}
+
+	public String getDataId() {
+		return dataId;
+	}
+
+	public String getMd5() {
+		return md5;
+	}
+}

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

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2018 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
+ *
+ *      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 org.springframework.cloud.alibaba.nacos.refresh;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+/**
+ * @author xiaojing
+ */
+@Component
+public class NacosRefreshProperties {
+
+	@Value("${spring.cloud.nacos.config.refresh.enabled:true}")
+	private boolean enabled = true;
+
+	public boolean isEnabled() {
+		return enabled;
+	}
+
+	public void setEnabled(boolean enabled) {
+		this.enabled = enabled;
+	}
+}