DBZ-9440- Add connection validator for Milvus.

debezium-platform-conductor/pom.xml

@@ -364,6 +364,13 @@
             <version>${kafka-clients.version}</version>
         </dependency>
 
+        <!-- Milvus SDK for connection validation -->
+        <dependency>
+            <groupId>io.milvus</groupId>
+            <artifactId>milvus-sdk-java</artifactId>
+            <version>2.6.4</version>
+        </dependency>
+
 
         <dependency>
             <groupId>io.quarkus</groupId>

debezium-platform-conductor/src/main/java/io/debezium/platform/environment/connection/destination/MilvusConnectionValidator.java

@@ -0,0 +1,212 @@
+/*
+ * Copyright Debezium Authors.
+ *
+ * Licensed under the Apache Software License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package io.debezium.platform.environment.connection.destination;
+
+import java.util.Map;
+
+import jakarta.enterprise.context.ApplicationScoped;
+import jakarta.inject.Named;
+
+import org.eclipse.microprofile.config.inject.ConfigProperty;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import io.debezium.platform.data.dto.ConnectionValidationResult;
+import io.debezium.platform.domain.views.Connection;
+import io.debezium.platform.environment.connection.ConnectionValidator;
+import io.milvus.v2.client.ConnectConfig;
+import io.milvus.v2.client.MilvusClientV2;
+
+/**
+ * Implementation of {@link ConnectionValidator} for Milvus vector database connections.
+ * <p>
+ * This validator performs validation of Milvus connection configurations
+ * including network connectivity, authentication, and database accessibility.
+ * </p>
+ *
+ * <p>
+ * The validation process includes:
+ * <ul>
+ *   <li>Connection parameter validation (host, port, database)</li>
+ *   <li>Client connection establishment</li>
+ *   <li>Authentication verification if credentials are provided</li>
+ *   <li>Basic database operation to confirm connectivity</li>
+ *   <li>Timeout handling for network issues</li>
+ * </ul>
+ * </p>
+ *
+ * @author Pranav Tiwari
+ */
+@ApplicationScoped
+@Named("MILVUS")
+public class MilvusConnectionValidator implements ConnectionValidator {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(MilvusConnectionValidator.class);
+
+    private final int defaultConnectionTimeout;
+
+    private static final String URI_KEY = "uri";
+    private static final String DATABASE_KEY = "database";
+    private static final String USERNAME_KEY = "username";
+    private static final String PASSWORD_KEY = "password";
+    private static final String TOKEN_KEY = "token";
+
+    public MilvusConnectionValidator(@ConfigProperty(name = "destinations.milvus.connection.timeout") int defaultConnectionTimeout) {
+        this.defaultConnectionTimeout = defaultConnectionTimeout;
+    }
+
+    @Override
+    public ConnectionValidationResult validate(Connection connectionConfig) {
+        if (connectionConfig == null) {
+            return ConnectionValidationResult.failed("Connection configuration cannot be null");
+        }
+
+        try {
+            LOGGER.debug("Starting Milvus connection validation for connection: {}", connectionConfig.getName());
+
+            Map<String, Object> milvusConfig = connectionConfig.getConfig();
+
+            // Validate required configuration parameters
+            ConnectionValidationResult configValidation = validateConfiguration(milvusConfig);
+            if (!configValidation.valid()) {
+                return configValidation;
+            }
+
+            return performConnectionValidation(milvusConfig);
+
+        }
+        catch (Exception e) {
+            LOGGER.error("Unexpected error during Milvus connection validation", e);
+            return ConnectionValidationResult.failed("Validation failed due to unexpected error: " + e.getMessage());
+        }
+    }
+
+    /**
+     * Validates the required Milvus configuration parameters.
+     *
+     * @param milvusConfig the Milvus configuration properties
+     * @return ConnectionValidationResult indicating parameter validation result
+     */
+    private ConnectionValidationResult validateConfiguration(Map<String, Object> milvusConfig) {
+        if (!milvusConfig.containsKey(URI_KEY) ||
+                milvusConfig.get(URI_KEY) == null ||
+                milvusConfig.get(URI_KEY).toString().trim().isEmpty()) {
+            return ConnectionValidationResult.failed("URI must be specified");
+        }
+
+        // Validate URI format
+        String uri = milvusConfig.get(URI_KEY).toString().trim();
+        if (!uri.startsWith("http://") && !uri.startsWith("https://")) {
+            return ConnectionValidationResult.failed("URI must start with http:// or https://");
+        }
+
+        return ConnectionValidationResult.successful();
+    }
+
+    /**
+     * Performs the actual connection validation by attempting to connect to Milvus
+     * using the official Milvus V2 SDK client.
+     *
+     * @param milvusConfig the Milvus configuration properties
+     * @return ConnectionValidationResult indicating success or failure
+     */
+    private ConnectionValidationResult performConnectionValidation(Map<String, Object> milvusConfig) {
+        MilvusClientV2 milvusClient = null;
+
+        try {
+            LOGGER.debug("Creating Milvus V2 client for validation");
+
+            // Use the provided URI directly
+            String uri = milvusConfig.get(URI_KEY).toString().trim();
+            LOGGER.debug("Attempting to connect to Milvus at: {}", uri);
+
+            // Build connection configuration using the official API
+            var configBuilder = ConnectConfig.builder()
+                    .uri(uri)
+                    .rpcDeadlineMs(defaultConnectionTimeout * 1000L); // Convert seconds to milliseconds
+
+            // Add database if specified
+            if (milvusConfig.containsKey(DATABASE_KEY) && milvusConfig.get(DATABASE_KEY) != null
+                    && !milvusConfig.get(DATABASE_KEY).toString().trim().isEmpty()) {
+                configBuilder.dbName(milvusConfig.get(DATABASE_KEY).toString());
+                LOGGER.debug("Using database: {}", milvusConfig.get(DATABASE_KEY).toString());
+            }
+
+            // Add authentication if provided
+            if (milvusConfig.containsKey(TOKEN_KEY) && milvusConfig.get(TOKEN_KEY) != null
+                    && !milvusConfig.get(TOKEN_KEY).toString().trim().isEmpty()) {
+                // Token format: "username:password"
+                configBuilder.token(milvusConfig.get(TOKEN_KEY).toString());
+                LOGGER.debug("Using token authentication");
+            }
+            else if (milvusConfig.containsKey(USERNAME_KEY) && milvusConfig.get(USERNAME_KEY) != null
+                    && milvusConfig.containsKey(PASSWORD_KEY) && milvusConfig.get(PASSWORD_KEY) != null) {
+                // Separate username and password
+                configBuilder.username(milvusConfig.get(USERNAME_KEY).toString())
+                        .password(milvusConfig.get(PASSWORD_KEY).toString());
+                LOGGER.debug("Using username/password authentication for user: {}", milvusConfig.get(USERNAME_KEY).toString());
+            }
+
+            // Create client with the configuration
+            milvusClient = new MilvusClientV2(configBuilder.build());
+
+            LOGGER.debug("Successfully created Milvus client, performing basic validation");
+
+            // Perform a simple operation to verify the connection works
+            // Using listDatabases() as a lightweight operation to test connectivity
+            var databases = milvusClient.listDatabases();
+            LOGGER.debug("Successfully validated Milvus connection. Available databases: {}", databases.getDatabaseNames().size());
+
+            return ConnectionValidationResult.successful();
+
+        }
+        catch (Exception e) {
+            LOGGER.warn("Failed to connect to Milvus server", e);
+
+            String errorMessage = e.getMessage();
+            if (errorMessage == null) {
+                errorMessage = e.getClass().getSimpleName();
+            }
+
+            // Handle specific error types with user-friendly messages
+            if (errorMessage.contains("timeout") || errorMessage.contains("TimeoutException") ||
+                    errorMessage.contains("deadline")) {
+                return ConnectionValidationResult.failed(
+                        "Connection timeout - please check host, port and network connectivity");
+            }
+            else if (errorMessage.contains("authentication") || errorMessage.contains("auth") ||
+                    errorMessage.contains("permission") || errorMessage.contains("credentials") ||
+                    errorMessage.contains("Unauthenticated")) {
+                return ConnectionValidationResult.failed(
+                        "Authentication failed - please check username, password, or token");
+            }
+            else if (errorMessage.contains("connect") || errorMessage.contains("refused") ||
+                    errorMessage.contains("unreachable") || errorMessage.contains("UNAVAILABLE")) {
+                return ConnectionValidationResult.failed(
+                        "Cannot connect to Milvus server - please check host and port configuration");
+            }
+            else if (errorMessage.contains("database") && errorMessage.contains("not found")) {
+                return ConnectionValidationResult.failed(
+                        "Specified database does not exist - please check database name");
+            }
+            else {
+                return ConnectionValidationResult.failed("Failed to connect to Milvus: " + errorMessage);
+            }
+
+        }
+        finally {
+            if (milvusClient != null) {
+                try {
+                    LOGGER.debug("Closing Milvus client");
+                    milvusClient.close();
+                }
+                catch (Exception e) {
+                    LOGGER.warn("Error closing Milvus client", e);
+                }
+            }
+        }
+    }
+}

debezium-platform-conductor/src/main/resources/application.yml

@@ -44,6 +44,9 @@ destinations:
   kafka:
     connection:
       timeout: 60
+  milvus:
+    connection:
+      timeout: 60
 
 quarkus:
   rest-client:

debezium-platform-conductor/src/main/resources/connection-schemas.json

@@ -214,7 +214,43 @@
       "properties": {
         "bootstrap.servers": {
           "type": "list",
-          "title": "List of “hostname:port” pairs that address one or more (even all) of the brokers."
+          "title": "List of "hostname:port" pairs that address one or more (even all) of the brokers."
+        }
+      }
+    }
+  },
+  {
+    "type": "MILVUS",
+    "schema": {
+      "title": "Milvus vector database connection properties",
+      "description": "Milvus vector database connection properties",
+      "type": "object",
+      "required": [
+        "uri"
+      ],
+      "additionalProperties": {
+        "type": "string"
+      },
+      "properties": {
+        "uri": {
+          "type": "string",
+          "title": "The URI of the Milvus server (e.g., http://localhost:19530)"
+        },
+        "database": {
+          "type": "string",
+          "title": "The name of the database to connect to (optional)"
+        },
+        "username": {
+          "type": "string",
+          "title": "Username for authentication (optional)"
+        },
+        "password": {
+          "type": "string",
+          "title": "Password for authentication (optional)"
+        },
+        "token": {
+          "type": "string",
+          "title": "Token for authentication (alternative to username/password, format: username:password)"
         }
       }
     }