Add plugin handler and configuration classes

sermant-backend/src/main/java/io/sermant/backend/common/conf/CommonConst.java

@@ -133,6 +133,16 @@ public class CommonConst {
                     + "> throwable: %s  " + System.lineSeparator()
                     + "---  " + System.lineSeparator();
 
+    /**
+     * Service name for global configuration
+     */
+    public static final String GLOBAL_CONFIGURATION_SERVICE_NAME = "ALL_SERVICE";
+
+    /**
+     * Default regular expression for configuration item Group
+     */
+    public static final String CONFIGURATION_DEFAULT_PATTERN = "^(app=[^&]*+&environment=[^&]*+(&service=[^&]*)?)?$";
+
     private CommonConst() {
 
     }

sermant-backend/src/main/java/io/sermant/backend/common/conf/DynamicConfig.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ * 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 io.sermant.backend.common.conf;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.stereotype.Component;
+
+/**
+ * Configuration class for dynamic configuration function
+ *
+ * @author zhp
+ * @since 2024-05-21
+ */
+@Configuration
+@Getter
+@Setter
+@Component
+public class DynamicConfig {
+    /**
+     * Connection address of configuration center
+     */
+    @Value("${dynamic.config.serverAddress}")
+    private String serverAddress;
+
+    /**
+     * Type of Configuration Center
+     */
+    @Value("${dynamic.config.dynamicConfigType}")
+    private String dynamicConfigType;
+
+    /**
+     * Request timeout
+     */
+    @Value("${dynamic.config.requestTimeout}")
+    private long requestTimeout;
+
+    /**
+     * Connection timeout
+     */
+    @Value("${dynamic.config.connectTimeout}")
+    private long connectTimeout;
+
+    /**
+     * Session timeout
+     */
+    @Value("${dynamic.config.timeout}")
+    private int timeout;
+
+    /**
+     * Authorized switch
+     */
+    @Value("${dynamic.config.enableAuth}")
+    private boolean enableAuth;
+
+    /**
+     * userName, used for configuration center connection authorization
+     */
+    @Value("${dynamic.config.userName}")
+    private String userName;
+
+    /**
+     * password, used for configuration center connection authorization
+     */
+    @Value("${dynamic.config.password}")
+    private String password;
+
+    /**
+     * Encryption and decryption keys for passwords
+     */
+    @Value("${dynamic.config.secretKey}")
+    private String secretKey;
+
+    /**
+     * Namespaces, only used by the nacos configuration center
+     */
+    @Value("${dynamic.config.namespace}")
+    private String namespace = "default";
+
+    /**
+     * Switch for configuration management
+     */
+    @Value("${dynamic.config.dynamicConfigEnable}")
+    private boolean dynamicConfigEnable;
+}

sermant-backend/src/main/java/io/sermant/backend/entity/config/PluginType.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ * 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 io.sermant.backend.entity.config;
+
+import io.sermant.backend.handler.config.DatabaseWriteProhibitionPluginHandler;
+import io.sermant.backend.handler.config.FlowControlPluginHandler;
+import io.sermant.backend.handler.config.LoadbalancerPluginHandler;
+import io.sermant.backend.handler.config.MqConsumeProhibitionPluginHandler;
+import io.sermant.backend.handler.config.OtherPluginHandler;
+import io.sermant.backend.handler.config.PluginConfigHandler;
+import io.sermant.backend.handler.config.RemovalPluginHandler;
+import io.sermant.backend.handler.config.RouterPluginHandler;
+import io.sermant.backend.handler.config.ServiceRegistryPluginHandler;
+import io.sermant.backend.handler.config.SpringBootRegistryPluginHandler;
+import io.sermant.backend.handler.config.TagTransmissionPluginHandler;
+import lombok.Getter;
+
+import java.util.Optional;
+
+/**
+ * Plugin type
+ *
+ * @author zhp
+ * @since 2024-05-16
+ */
+@Getter
+public enum PluginType {
+    /**
+     * Label routing plugin
+     */
+    ROUTER("router", new RouterPluginHandler()),
+
+    /**
+     * Springboot registration plugin
+     */
+    SPRINGBOOT_REGISTRY("springboot-registry", new SpringBootRegistryPluginHandler()),
+
+    /**
+     * Register migration plugin
+     */
+    SERVICE_REGISTRY("service-registry", new ServiceRegistryPluginHandler()),
+
+    /**
+     * flowcontrol plugin
+     */
+    FLOW_CONTROL("flowcontrol", new FlowControlPluginHandler()),
+
+    /**
+     * Outlier instance removal plugin
+     */
+    REMOVAL("removal", new RemovalPluginHandler()),
+
+    /**
+     * Load balancing plugin
+     */
+    LOADBALANCER("loadbalancer", new LoadbalancerPluginHandler()),
+
+    /**
+     * Traffic tag transparency plugin
+     */
+    TAG_TRANSMISSION("tag-transmission", new TagTransmissionPluginHandler()),
+
+    /**
+     * Message queue prohibited consumption plugin
+     */
+    MQ_CONSUME_PROHIBITION("mq-consume-prohibition", new MqConsumeProhibitionPluginHandler()),
+
+    /**
+     * Database write prohibited plugin
+     */
+    DATABASE_WRITE_PROHIBITION("database-write-prohibition", new DatabaseWriteProhibitionPluginHandler()),
+
+    /**
+     * other plugin
+     */
+    OTHER("other", new OtherPluginHandler());
+
+    private final String pluginName;
+
+    private final PluginConfigHandler handler;
+
+    PluginType(String pluginName, PluginConfigHandler handler) {
+        this.pluginName = pluginName;
+        this.handler = handler;
+    }
+
+    /**
+     * Obtain plugin type based on plugin name
+     *
+     * @param pluginName plugin name
+     * @return plugin type
+     */
+    public static Optional<PluginType> getPluginType(String pluginName) {
+        for (PluginType pluginType : PluginType.values()) {
+            if (pluginType.pluginName.equals(pluginName)) {
+                return Optional.of(pluginType);
+            }
+        }
+        return Optional.empty();
+    }
+}

sermant-backend/src/main/java/io/sermant/backend/handler/config/DatabaseWriteProhibitionPluginHandler.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ * 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 io.sermant.backend.handler.config;
+
+import io.sermant.backend.common.conf.CommonConst;
+import io.sermant.backend.entity.config.ConfigInfo;
+import io.sermant.backend.entity.config.PluginType;
+
+import org.apache.commons.lang.StringUtils;
+
+import java.util.Map;
+
+/**
+ * Database Write Prohibition plugin handler
+ *
+ * @author zhp
+ * @since 2024-05-16
+ */
+public class DatabaseWriteProhibitionPluginHandler extends PluginConfigHandler {
+    private static final String GLOBAL_CONFIGURATION_NAME = "sermant.database.write.globalConfig";
+
+    private static final String SERVICE_CONFIGURATION_NAME_PREFIX = "sermant.database.write.";
+
+    private static final String PATTERN = "^(app=[^&]*+&environment=[^&]*+(&zone=[^&]*)?)?$";
+
+    @Override
+    public ConfigInfo parsePluginInfo(String key, String group) {
+        Map<String, String> map = parseGroup(group);
+        ConfigInfo configInfo = new ConfigInfo();
+        if (StringUtils.equals(key, GLOBAL_CONFIGURATION_NAME)) {
+            configInfo.setServiceName(CommonConst.GLOBAL_CONFIGURATION_SERVICE_NAME);
+        } else if (key.startsWith(SERVICE_CONFIGURATION_NAME_PREFIX)) {
+            configInfo.setServiceName(key.replace(SERVICE_CONFIGURATION_NAME_PREFIX, ""));
+        }
+        configInfo.setAppName(map.get(APP_KEY));
+        configInfo.setEnvironment(map.get(ENVIRONMENT_KEY));
+        configInfo.setZone(map.get(ZONE_KEY));
+        configInfo.setKey(key);
+        configInfo.setGroup(group);
+        configInfo.setPluginType(PluginType.DATABASE_WRITE_PROHIBITION.getPluginName());
+        return configInfo;
+    }
+
+    @Override
+    public boolean verifyConfiguration(String key, String group) {
+        if (StringUtils.isBlank(key) || StringUtils.isBlank(group)) {
+            return false;
+        }
+        if (!group.matches(PATTERN)) {
+            return false;
+        }
+        return key.equals(GLOBAL_CONFIGURATION_NAME) || key.startsWith(SERVICE_CONFIGURATION_NAME_PREFIX);
+    }
+}

sermant-backend/src/main/java/io/sermant/backend/handler/config/FlowControlPluginHandler.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ * 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 io.sermant.backend.handler.config;
+
+import io.sermant.backend.entity.config.ConfigInfo;
+import io.sermant.backend.entity.config.PluginType;
+
+import org.apache.commons.lang.StringUtils;
+
+import java.util.Map;
+
+/**
+ * Flow control plugin handler
+ *
+ * @author zhp
+ * @since 2024-05-16
+ */
+public class FlowControlPluginHandler extends PluginConfigHandler {
+    private static final String[] CONFIGURATION_NAME_PREFIX_ARRAY = {"servicecomb.rateLimiting.",
+            "servicecomb.matchGroup.", "servicecomb.circuitBreaker.", "servicecomb.bulkhead.",
+            "servicecomb.faultInjection.", "servicecomb.retry.", "servicecomb.system."};
+
+    private static final String PATTERN = "^service=[^&]*$";
+
+    @Override
+    public ConfigInfo parsePluginInfo(String key, String group) {
+        Map<String, String> map = parseGroup(group);
+        ConfigInfo configInfo = new ConfigInfo();
+        configInfo.setServiceName(map.get(SERVICE_KEY));
+        configInfo.setKey(key);
+        configInfo.setGroup(group);
+        configInfo.setPluginType(PluginType.FLOW_CONTROL.getPluginName());
+        return configInfo;
+    }
+
+    @Override
+    public boolean verifyConfiguration(String key, String group) {
+        if (StringUtils.isBlank(key) || StringUtils.isBlank(group)) {
+            return false;
+        }
+        if (!group.matches(PATTERN)) {
+            return false;
+        }
+        for (String name : CONFIGURATION_NAME_PREFIX_ARRAY) {
+            if (key.startsWith(name)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}