Registry center for Nacos (apache#3150)

* check codes by checkstyle

sharding-orchestration/sharding-orchestration-reg/pom.xml

@@ -30,5 +30,6 @@
     <modules>
         <module>sharding-orchestration-reg-api</module>
         <module>sharding-orchestration-reg-zookeeper-curator</module>
+        <module>sharding-orchestration-reg-nacos</module>
     </modules>
 </project>

sharding-orchestration/sharding-orchestration-reg/sharding-orchestration-reg-nacos/pom.xml

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ 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.
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.shardingsphere</groupId>
+        <artifactId>sharding-orchestration-reg</artifactId>
+        <version>4.0.0-RC3-SNAPSHOT</version>
+    </parent>
+    <artifactId>sharding-orchestration-reg-nacos</artifactId>
+    <name>${project.artifactId}</name>
+
+    <properties>
+        <nacos-client.verison>1.0.0</nacos-client.verison>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.shardingsphere</groupId>
+            <artifactId>sharding-orchestration-reg-api</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.alibaba.nacos</groupId>
+            <artifactId>nacos-client</artifactId>
+            <version>${nacos-client.verison}</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>

sharding-orchestration/sharding-orchestration-reg/sharding-orchestration-reg-nacos/src/main/java/org/apache/shardingsphere/orchestration/reg/nacos/NacosRegistryCenter.java

@@ -0,0 +1,149 @@
+/*
+ * 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 org.apache.shardingsphere.orchestration.reg.nacos;
+
+import com.alibaba.nacos.api.NacosFactory;
+import com.alibaba.nacos.api.config.ConfigService;
+import com.alibaba.nacos.api.config.listener.Listener;
+import com.alibaba.nacos.api.exception.NacosException;
+import com.google.common.base.Strings;
+import lombok.Getter;
+import lombok.Setter;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.shardingsphere.orchestration.reg.api.RegistryCenter;
+import org.apache.shardingsphere.orchestration.reg.api.RegistryCenterConfiguration;
+import org.apache.shardingsphere.orchestration.reg.listener.DataChangedEvent;
+import org.apache.shardingsphere.orchestration.reg.listener.DataChangedEventListener;
+
+import java.util.List;
+import java.util.Properties;
+import java.util.concurrent.Executor;
+
+@Slf4j
+public class NacosRegistryCenter implements RegistryCenter {
+
+    private ConfigService configService;
+
+    @Getter
+    @Setter
+    private Properties properties = new Properties();
+
+    @Override
+    public void init(final RegistryCenterConfiguration config) {
+        try {
+            configService = NacosFactory.createConfigService(config.getServerLists());
+        } catch (NacosException e) {
+            log.debug("exception for: {}", e.toString());
+        }
+    }
+
+    @Override
+    public String get(final String key) {
+        return getDirectly(key);
+    }
+
+    @Override
+    public String getDirectly(final String key) {
+        try {
+            String dataId = key.replace("/", ".");
+            String group = properties.getProperty("group", "SHARDING_SPHERE_DEFAULT_GROUP");
+            long timeoutMs = Long.parseLong(properties.getProperty("timeout", "3000"));
+            return configService.getConfig(dataId, group, timeoutMs);
+        } catch (NacosException e) {
+            log.debug("exception for: {}", e.toString());
+            return null;
+        }
+    }
+
+    @Override
+    public boolean isExisted(final String key) {
+        return !Strings.isNullOrEmpty(getDirectly(key));
+    }
+
+    @Override
+    public List<String> getChildrenKeys(final String key) {
+        return null;
+    }
+
+    @Override
+    public void persist(final String key, final String value) {
+        update(key, value);
+    }
+
+    @Override
+    public void update(final String key, final String value) {
+        try {
+            String dataId = key.replace("/", ".");
+            String group = properties.getProperty("group", "SHARDING_SPHERE_DEFAULT_GROUP");
+            configService.publishConfig(dataId, group, value);
+        } catch (NacosException e) {
+            log.debug("exception for: {}", e.toString());
+        }
+    }
+
+    @Override
+    public void persistEphemeral(final String key, final String value) {
+
+    }
+
+    @Override
+    public void watch(final String key, final DataChangedEventListener dataChangedEventListener) {
+        try {
+            String dataId = key.replace("/", ".");
+            String group = properties.getProperty("group", "SHARDING_SPHERE_DEFAULT_GROUP");
+            configService.addListener(dataId, group, new Listener() {
+
+                @Override
+                public Executor getExecutor() {
+                    return null;
+                }
+
+                @Override
+                public void receiveConfigInfo(final String configInfo) {
+                    dataChangedEventListener.onChange(new DataChangedEvent(key, configInfo, DataChangedEvent.ChangedType.UPDATED));
+                }
+            });
+        } catch (NacosException e) {
+            log.debug("exception for: {}", e.toString());
+        }
+    }
+
+    @Override
+    public void close() {
+    }
+
+    @Override
+    public void initLock(final String key) {
+
+    }
+
+    @Override
+    public boolean tryLock() {
+        return false;
+    }
+
+    @Override
+    public void tryRelease() {
+
+    }
+
+    @Override
+    public String getType() {
+        return "nacos";
+    }
+}

sharding-orchestration/sharding-orchestration-reg/sharding-orchestration-reg-nacos/src/main/resources/META-INF/services/org.apache.shardingsphere.orchestration.reg.api.RegistryCenter

@@ -0,0 +1,18 @@
+#
+# 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.
+#
+
+org.apache.shardingsphere.orchestration.reg.nacos.NacosRegistryCenter

sharding-orchestration/sharding-orchestration-reg/sharding-orchestration-reg-nacos/src/test/java/org/apache/shardingsphere/orchestration/reg/nacos/NacosRegistryCenterTest.java

@@ -0,0 +1,50 @@
+/*
+ * 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 org.apache.shardingsphere.orchestration.reg.nacos;
+
+import org.apache.shardingsphere.orchestration.reg.api.RegistryCenter;
+import org.apache.shardingsphere.orchestration.reg.api.RegistryCenterConfiguration;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.util.Properties;
+
+public class NacosRegistryCenterTest {
+
+    private static RegistryCenter nacosRegistryCenter = new NacosRegistryCenter();
+
+    @BeforeClass
+    public static void init() {
+        Properties properties = new Properties();
+        properties.setProperty("group", "SHARDING_SPHERE_DEFAULT_GROUP");
+        properties.setProperty("timeout", "3000");
+        RegistryCenterConfiguration configuration = new RegistryCenterConfiguration(nacosRegistryCenter.getType(), properties);
+        configuration.setServerLists("127.0.0.1:8848");
+        nacosRegistryCenter.init(configuration);
+    }
+
+    @Test
+    public void assertPersist() {
+        nacosRegistryCenter.persist("sharding/test", "value1");
+    }
+
+    @Test
+    public void assertUpdate() {
+        nacosRegistryCenter.update("sharding/test", "value2");
+    }
+}