Multiple Import Metadata actions

src/main/java/com/autotune/analyzer/services/DSMetadataService.java

@@ -16,13 +16,16 @@
 
 package com.autotune.analyzer.services;
 
+import com.autotune.analyzer.exceptions.KruizeResponse;
 import com.autotune.analyzer.serviceObjects.DSMetadataAPIObject;
 import com.autotune.analyzer.utils.AnalyzerConstants;
 import com.autotune.analyzer.utils.AnalyzerErrorConstants;
 import com.autotune.analyzer.utils.GsonUTCDateAdapter;
+import com.autotune.common.data.ValidationOutputData;
 import com.autotune.common.data.dataSourceMetadata.DataSourceMetadataInfo;
 import com.autotune.common.datasource.DataSourceInfo;
 import com.autotune.common.datasource.DataSourceManager;
+import com.autotune.database.dao.ExperimentDAOImpl;
 import com.autotune.database.service.ExperimentDBService;
 import com.autotune.utils.KruizeSupportedTypes;
 import com.autotune.utils.MetricsConfig;
@@ -38,10 +41,8 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Set;
+import java.io.PrintWriter;
+import java.util.*;
 import java.util.stream.Collectors;
 
 import static com.autotune.analyzer.utils.AnalyzerConstants.ServiceConstants.CHARACTER_ENCODING;
@@ -283,4 +284,96 @@ private Gson createGsonObject() {
     private boolean isValidBooleanValue(String value) {
         return value != null && (value.equals("true") || value.equals("false"));
     }
+
+    /**
+     * TODO temp solution to delete metadata, Need to evaluate use cases
+     *
+     * @param request
+     * @param response
+     * @throws ServletException
+     * @throws IOException
+     */
+    @Override
+    protected void doDelete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        HashMap<String, DataSourceMetadataInfo> dataSourceMetadataMap = new HashMap<>();
+        String inputData = "";
+        try {
+            // Set the character encoding of the request to UTF-8
+            request.setCharacterEncoding(CHARACTER_ENCODING);
+
+            inputData = request.getReader().lines().collect(Collectors.joining());
+            if (null == inputData || inputData.isEmpty()) {
+                throw new Exception("Request input data cannot be null or empty");
+            }
+            DSMetadataAPIObject metadataAPIObject = new Gson().fromJson(inputData, DSMetadataAPIObject.class);
+            metadataAPIObject.validateInputFields();
+            String dataSourceName = metadataAPIObject.getDataSourceName();
+
+            if (null == dataSourceName || dataSourceName.isEmpty()) {
+                sendErrorResponse(
+                        inputData,
+                        response,
+                        null,
+                        HttpServletResponse.SC_BAD_REQUEST,
+                        AnalyzerErrorConstants.APIErrors.DSMetadataAPI.DATASOURCE_NAME_MANDATORY);
+            }
+
+            DataSourceInfo datasource = new ExperimentDBService().loadDataSourceFromDBByName(dataSourceName);
+
+            if (null == datasource) {
+                sendErrorResponse(
+                        inputData,
+                        response,
+                        new Exception(AnalyzerErrorConstants.APIErrors.DSMetadataAPI.INVALID_DATASOURCE_NAME_METADATA_EXCPTN),
+                        HttpServletResponse.SC_BAD_REQUEST,
+                        String.format(AnalyzerErrorConstants.APIErrors.DSMetadataAPI.DATASOURCE_METADATA_DELETE_ERROR_MSG, dataSourceName)
+                );
+            }
+
+            try {
+                DataSourceMetadataInfo dataSourceMetadata = new ExperimentDBService().loadMetadataFromDBByName(dataSourceName, "false");
+                if (null == dataSourceMetadata) {
+                    sendErrorResponse(
+                            inputData,
+                            response,
+                            new Exception(AnalyzerErrorConstants.APIErrors.DSMetadataAPI.MISSING_DATASOURCE_METADATA_EXCPTN),
+                            HttpServletResponse.SC_BAD_REQUEST,
+                            String.format(AnalyzerErrorConstants.APIErrors.DSMetadataAPI.DATASOURCE_METADATA_DELETE_ERROR_MSG, dataSourceName)
+                    );
+                }
+                dataSourceMetadataMap.put(dataSourceName, dataSourceMetadata);
+
+                if (!dataSourceMetadataMap.isEmpty() && dataSourceMetadataMap.containsKey(dataSourceName)) {
+                    ValidationOutputData validationOutputData = new ExperimentDAOImpl().deleteKruizeDSMetadataEntryByName(dataSourceName);
+                    if (validationOutputData.isSuccess()) {
+                        new DataSourceManager().deleteMetadataFromDataSource(datasource);
+                        dataSourceMetadataMap.remove(dataSourceName);
+                    } else {
+                        throw new Exception("Datasource metadata not deleted due to : " + validationOutputData.getMessage());
+                    }
+                } else {
+                    throw new Exception("Datasource metadata not found!");
+                }
+                sendSuccessResponse(response, "Datasource metadata deleted successfully.");
+            } catch (Exception e) {
+                LOGGER.error("Loading saved metadata for datasource {} failed: {} ", dataSourceName, e.getMessage());
+            }
+
+        } catch (Exception e) {
+            sendErrorResponse(inputData, response, e, HttpServletResponse.SC_BAD_REQUEST, e.getMessage());
+        }
+    }
+
+    private void sendSuccessResponse(HttpServletResponse response, String message) throws IOException {
+        response.setContentType(JSON_CONTENT_TYPE);
+        response.setCharacterEncoding(CHARACTER_ENCODING);
+        response.setStatus(HttpServletResponse.SC_CREATED);
+        PrintWriter out = response.getWriter();
+        out.append(
+                new Gson().toJson(
+                        new KruizeResponse(message + " View imported metadata at GET /dsmetadata", HttpServletResponse.SC_CREATED, "", "SUCCESS")
+                )
+        );
+        out.flush();
+    }
 }

src/main/java/com/autotune/analyzer/utils/AnalyzerErrorConstants.java

@@ -185,6 +185,7 @@ private DSMetadataAPI(){
             public static final String MISSING_DATASOURCE_METADATA_MSG = "Metadata for a given datasource - \" %s \", cluster name - \" %s \", namespace - \"%s \" " +
                     "either does not exist or is not valid";
             public static final String DATASOURCE_METADATA_IMPORT_ERROR_MSG = "Metadata cannot be imported for datasource - \" %s \" , either does not exist or is not valid";
+            public static final String DATASOURCE_METADATA_DELETE_ERROR_MSG = "Metadata cannot be deleted for datasource - \" %s \" , either does not exist or is not valid";
             public static final String INVALID_QUERY_PARAM = "The query param(s) - \" %s \" is/are invalid";
             public static final String INVALID_QUERY_PARAM_VALUE = "The query param value(s) is/are invalid";
         }

src/main/java/com/autotune/database/dao/ExperimentDAO.java

@@ -94,4 +94,6 @@ public interface ExperimentDAO {
     // Load metadata
     List<KruizeDSMetadataEntry> loadMetadata() throws Exception;
 
+    // Delete metadata
+    public ValidationOutputData deleteKruizeDSMetadataEntryByName(String dataSourceName);
 }

src/main/java/com/autotune/database/dao/ExperimentDAOImpl.java

@@ -500,6 +500,44 @@ public ValidationOutputData deleteKruizeExperimentEntryByName(String experimentN
         return validationOutputData;
     }
 
+    /**
+     * Delete metadata with the name dataSourceName
+     * This deletes the metadata from the KruizeDSMetadataEntry table
+     * @param dataSourceName
+     * @return
+     */
+    @Override
+    public ValidationOutputData deleteKruizeDSMetadataEntryByName(String dataSourceName) {
+        ValidationOutputData validationOutputData = new ValidationOutputData(false, null, null);
+        Transaction tx = null;
+        try (Session session = KruizeHibernateUtil.getSessionFactory().openSession()) {
+            try {
+                tx = session.beginTransaction();
+                Query query = session.createQuery(DELETE_FROM_METADATA_BY_DATASOURCE_NAME, null);
+                query.setParameter("dataSourceName", dataSourceName);
+                int deletedCount = query.executeUpdate();
+
+                if (deletedCount == 0) {
+                    validationOutputData.setSuccess(false);
+                    validationOutputData.setMessage("KruizeDSMetadataEntry not found with datasource name: " + dataSourceName);
+                } else {
+                    validationOutputData.setSuccess(true);
+                }
+                tx.commit();
+            } catch (HibernateException e) {
+                LOGGER.error("Not able to delete metadata for datasource {} due to {}", dataSourceName, e.getMessage());
+                if (tx != null) tx.rollback();
+                e.printStackTrace();
+                validationOutputData.setSuccess(false);
+                validationOutputData.setMessage(e.getMessage());
+                //todo save error to API_ERROR_LOG
+            }
+        } catch (Exception e) {
+            LOGGER.error("Not able to delete metadata for datasource {} due to {}", dataSourceName, e.getMessage());
+        }
+        return validationOutputData;
+    }
+
     @Override
     public List<KruizeExperimentEntry> loadAllExperiments() throws Exception {
         //todo load only experimentStatus=inprogress , playback may not require completed experiments

src/main/java/com/autotune/database/helper/DBConstants.java

@@ -61,6 +61,7 @@ public static final class SQLQUERY {
         public static final String DELETE_FROM_EXPERIMENTS_BY_EXP_NAME = "DELETE FROM KruizeExperimentEntry k WHERE k.experiment_name = :experimentName";
         public static final String DELETE_FROM_RESULTS_BY_EXP_NAME = "DELETE FROM KruizeResultsEntry k WHERE k.experiment_name = :experimentName";
         public static final String DELETE_FROM_RECOMMENDATIONS_BY_EXP_NAME = "DELETE FROM KruizeRecommendationEntry k WHERE k.experiment_name = :experimentName";
+        public static final String DELETE_FROM_METADATA_BY_DATASOURCE_NAME = "DELETE FROM KruizeDSMetadataEntry km WHERE km.datasource_name = :dataSourceName";
         public static final String DB_PARTITION_DATERANGE = "CREATE TABLE IF NOT EXISTS %s_%s%s%s PARTITION OF %s FOR VALUES FROM ('%s-%s-%s 00:00:00.000') TO ('%s-%s-%s 23:59:59');";
         public static final String SELECT_ALL_KRUIZE_TABLES = "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public' " +
                 "and (table_name like 'kruize_results_%' or table_name like 'kruize_recommendations_%') ";