Add dtos and other classes for task

core/src/main/java/com/scalar/db/common/error/CoreError.java

@@ -735,6 +735,20 @@ public enum CoreError implements ScalarDbError {
       "Multiple data mappings found for column '%s' in table '%s'",
       "",
       ""),
+  DATA_LOADER_MISSING_CLUSTERING_KEY_COLUMN(
+      Category.USER_ERROR,
+      "0166",
+      "Missing required field or column mapping for clustering key %s",
+      "",
+      ""),
+  DATA_LOADER_MISSING_PARTITION_KEY_COLUMN(
+      Category.USER_ERROR,
+      "0167",
+      "Missing required field or column mapping for partition key %s",
+      "",
+      ""),
+  DATA_LOADER_MISSING_COLUMN(
+      Category.USER_ERROR, "0168", "Missing field or column mapping for %s", "", ""),
   //
   // Errors for the concurrency error category
   //

data-loader/core/src/main/java/com/scalar/db/dataloader/core/dataimport/ImportOptions.java

@@ -0,0 +1,38 @@
+package com.scalar.db.dataloader.core.dataimport;
+
+import com.scalar.db.dataloader.core.FileFormat;
+import com.scalar.db.dataloader.core.dataimport.controlfile.ControlFile;
+import com.scalar.db.dataloader.core.dataimport.controlfile.ControlFileValidationLevel;
+import com.scalar.db.dataloader.core.dataimport.log.LogMode;
+import lombok.Builder;
+import lombok.Data;
+
+/** Import options to import data into one or more ScalarDB tables */
+@Builder
+@Data
+public class ImportOptions {
+
+  @Builder.Default private final ImportMode importMode = ImportMode.UPSERT;
+  @Builder.Default private final boolean requireAllColumns = false;
+  @Builder.Default private final FileFormat fileFormat = FileFormat.JSON;
+  @Builder.Default private final boolean prettyPrint = false;
+  @Builder.Default private final boolean ignoreNullValues = false;
+  @Builder.Default private final LogMode logMode = LogMode.SPLIT_BY_DATA_CHUNK;
+
+  @Builder.Default
+  private final ControlFileValidationLevel controlFileValidationLevel =
+      ControlFileValidationLevel.MAPPED;
+
+  @Builder.Default private final char delimiter = ',';
+
+  @Builder.Default private final boolean logSuccessRecords = false;
+  @Builder.Default private final boolean logRawRecord = false;
+
+  private final int dataChunkSize;
+  private final int transactionBatchSize;
+  private final ControlFile controlFile;
+  private final String namespace;
+  private final String tableName;
+  private final int maxThreads;
+  private final String customHeaderRow;
+}

data-loader/core/src/main/java/com/scalar/db/dataloader/core/dataimport/log/LogMode.java

@@ -0,0 +1,6 @@
+package com.scalar.db.dataloader.core.dataimport.log;
+
+public enum LogMode {
+  SINGLE_FILE,
+  SPLIT_BY_DATA_CHUNK
+}

data-loader/core/src/main/java/com/scalar/db/dataloader/core/dataimport/task/ImportTaskConstants.java

@@ -0,0 +1,17 @@
+package com.scalar.db.dataloader.core.dataimport.task;
+
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class ImportTaskConstants {
+  public static final String ERROR_COULD_NOT_FIND_PARTITION_KEY =
+      "could not find the partition key";
+  public static final String ERROR_UPSERT_INSERT_MISSING_COLUMNS =
+      "the source record needs to contain all fields if the UPSERT turns into an INSERT";
+  public static final String ERROR_DATA_ALREADY_EXISTS = "record already exists";
+  public static final String ERROR_DATA_NOT_FOUND = "record was not found";
+  public static final String ERROR_COULD_NOT_FIND_CLUSTERING_KEY =
+      "could not find the clustering key";
+  public static final String ERROR_TABLE_METADATA_MISSING = "No table metadata found";
+}

data-loader/core/src/main/java/com/scalar/db/dataloader/core/dataimport/task/mapping/ImportDataMapping.java

@@ -0,0 +1,28 @@
+package com.scalar.db.dataloader.core.dataimport.task.mapping;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.scalar.db.dataloader.core.dataimport.controlfile.ControlFileTable;
+import com.scalar.db.dataloader.core.dataimport.controlfile.ControlFileTableFieldMapping;
+
+public class ImportDataMapping {
+
+  /**
+   * * Update the source data replace the source column name with the target column name according
+   * to control file table data
+   *
+   * @param source source data
+   * @param controlFileTable control file table to map source data
+   */
+  public static void apply(ObjectNode source, ControlFileTable controlFileTable) {
+    // Copy the source field data to the target column if missing
+    for (ControlFileTableFieldMapping mapping : controlFileTable.getMappings()) {
+      String sourceField = mapping.getSourceField();
+      String targetColumn = mapping.getTargetColumn();
+
+      if (source.has(sourceField) && !source.has(targetColumn)) {
+        source.set(targetColumn, source.get(sourceField));
+        source.remove(sourceField);
+      }
+    }
+  }
+}

data-loader/core/src/main/java/com/scalar/db/dataloader/core/dataimport/task/validation/ImportSourceRecordValidationResult.java

@@ -0,0 +1,48 @@
+package com.scalar.db.dataloader.core.dataimport.task.validation;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import javax.annotation.concurrent.Immutable;
+
+/** The validation result for a data source record */
+@Immutable
+public final class ImportSourceRecordValidationResult {
+
+  private final List<String> errorMessages;
+  private final Set<String> columnsWithErrors;
+
+  /** Constructor */
+  public ImportSourceRecordValidationResult() {
+    this.errorMessages = new ArrayList<>();
+    this.columnsWithErrors = new HashSet<>();
+  }
+
+  /**
+   * Add a validation error message for a column. Also marking the column as containing an error.
+   *
+   * @param columnName column name
+   * @param errorMessage error message
+   */
+  public void addErrorMessage(String columnName, String errorMessage) {
+    this.columnsWithErrors.add(columnName);
+    this.errorMessages.add(errorMessage);
+  }
+
+  /** @return Immutable list of validation error messages */
+  public List<String> getErrorMessages() {
+    return Collections.unmodifiableList(this.errorMessages);
+  }
+
+  /** @return Immutable set of columns that had errors */
+  public Set<String> getColumnsWithErrors() {
+    return Collections.unmodifiableSet(this.columnsWithErrors);
+  }
+
+  /** @return Validation is valid or not */
+  public boolean isValid() {
+    return this.errorMessages.isEmpty();
+  }
+}

data-loader/core/src/main/java/com/scalar/db/dataloader/core/dataimport/task/validation/ImportSourceRecordValidator.java

@@ -0,0 +1,112 @@
+package com.scalar.db.dataloader.core.dataimport.task.validation;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.scalar.db.common.error.CoreError;
+import com.scalar.db.dataloader.core.DatabaseKeyType;
+import com.scalar.db.dataloader.core.util.TableMetadataUtil;
+import java.util.Set;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class ImportSourceRecordValidator {
+
+  /**
+   * Create list for validation error messages. Validate everything and not return when one single
+   * error is found. Avoiding trial and error imports where every time a new error appears
+   *
+   * @param partitionKeyNames List of partition keys in table
+   * @param clusteringKeyNames List of clustering keys in table
+   * @param columnNames List of all column names in table
+   * @param sourceRecord source data
+   * @param allColumnsRequired If true treat missing columns as an error
+   * @return Source record validation result
+   */
+  public static ImportSourceRecordValidationResult validateSourceRecord(
+      Set<String> partitionKeyNames,
+      Set<String> clusteringKeyNames,
+      Set<String> columnNames,
+      JsonNode sourceRecord,
+      boolean allColumnsRequired) {
+    ImportSourceRecordValidationResult validationResult = new ImportSourceRecordValidationResult();
+
+    // check if partition keys are found
+    checkMissingKeys(DatabaseKeyType.PARTITION, partitionKeyNames, sourceRecord, validationResult);
+
+    // check if clustering keys are found
+    checkMissingKeys(
+        DatabaseKeyType.CLUSTERING, clusteringKeyNames, sourceRecord, validationResult);
+
+    // Check if the record is missing any columns
+    if (allColumnsRequired) {
+      checkMissingColumns(
+          sourceRecord, columnNames, validationResult, validationResult.getColumnsWithErrors());
+    }
+
+    return validationResult;
+  }
+
+  /**
+   * Check if the required keys are found in the data file.
+   *
+   * @param keyType Type of key to validate
+   * @param keyColumnNames List of required column names
+   * @param sourceRecord source data
+   * @param validationResult Source record validation result
+   */
+  public static void checkMissingKeys(
+      DatabaseKeyType keyType,
+      Set<String> keyColumnNames,
+      JsonNode sourceRecord,
+      ImportSourceRecordValidationResult validationResult) {
+    for (String columnName : keyColumnNames) {
+      if (!sourceRecord.has(columnName)) {
+        String errorMessageFormat =
+            keyType == DatabaseKeyType.PARTITION
+                ? CoreError.DATA_LOADER_MISSING_PARTITION_KEY_COLUMN.buildMessage(columnName)
+                : CoreError.DATA_LOADER_MISSING_CLUSTERING_KEY_COLUMN.buildMessage(columnName);
+        validationResult.addErrorMessage(columnName, errorMessageFormat);
+      }
+    }
+  }
+
+  /**
+   * Make sure the json object is not missing any columns. Error added to validation errors lists
+   *
+   * @param sourceRecord Source json object
+   * @param columnNames List of column names for a table
+   * @param validationResult Source record validation result
+   * @param ignoreColumns Columns that can be ignored in the check
+   */
+  public static void checkMissingColumns(
+      JsonNode sourceRecord,
+      Set<String> columnNames,
+      ImportSourceRecordValidationResult validationResult,
+      Set<String> ignoreColumns) {
+    Set<String> metadataColumns = TableMetadataUtil.getMetadataColumns();
+    for (String columnName : columnNames) {
+      // If the field is not a metadata column and is missing and should not be ignored
+      if ((ignoreColumns == null || !ignoreColumns.contains(columnName))
+          && !TableMetadataUtil.isMetadataColumn(columnName, metadataColumns, columnNames)
+          && !sourceRecord.has(columnName)) {
+        validationResult.addErrorMessage(
+            columnName, CoreError.DATA_LOADER_MISSING_COLUMN.buildMessage(columnName));
+      }
+    }
+  }
+
+  /**
+   * Make sure the json object is not missing any columns. Error added to validation errors lists
+   *
+   * @param sourceRecord Source json object
+   * @param columnNames List of column names for a table
+   * @param validationResult Source record validation result
+   */
+  public static void checkMissingColumns(
+      JsonNode sourceRecord,
+      Set<String> columnNames,
+      ImportSourceRecordValidationResult validationResult) {
+    ImportSourceRecordValidator.checkMissingColumns(
+        sourceRecord, columnNames, validationResult, null);
+  }
+}

data-loader/core/src/test/java/com/scalar/db/dataloader/core/dataimport/task/mapping/ImportDataMappingTest.java

@@ -0,0 +1,45 @@
+package com.scalar.db.dataloader.core.dataimport.task.mapping;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.scalar.db.dataloader.core.dataimport.controlfile.ControlFileTable;
+import com.scalar.db.dataloader.core.dataimport.controlfile.ControlFileTableFieldMapping;
+import java.util.ArrayList;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class ImportDataMappingTest {
+
+  ControlFileTable controlFilTable;
+
+  @BeforeEach
+  void setup() {
+    controlFilTable = new ControlFileTable("namespace", "table");
+    ControlFileTableFieldMapping m1 = new ControlFileTableFieldMapping("source_id", "target_id");
+    ControlFileTableFieldMapping m2 =
+        new ControlFileTableFieldMapping("source_name", "target_name");
+    ControlFileTableFieldMapping m3 =
+        new ControlFileTableFieldMapping("source_email", "target_email");
+    ArrayList<ControlFileTableFieldMapping> mappingArrayList = new ArrayList<>();
+    mappingArrayList.add(m1);
+    mappingArrayList.add(m2);
+    mappingArrayList.add(m3);
+    controlFilTable.getMappings().addAll(mappingArrayList);
+  }
+
+  @Test
+  void apply_withValidData_shouldUpdateSourceData() throws JsonProcessingException {
+    ObjectMapper objectMapper = new ObjectMapper();
+    ObjectNode source = objectMapper.createObjectNode();
+    source.put("source_id", "111");
+    source.put("source_name", "abc");
+    source.put("source_email", "[email protected]");
+    ImportDataMapping.apply(source, controlFilTable);
+    // Assert changes
+    Assertions.assertEquals("111", source.get("target_id").asText());
+    Assertions.assertEquals("abc", source.get("target_name").asText());
+    Assertions.assertEquals("[email protected]", source.get("target_email").asText());
+  }
+}