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com.databricks.jdbc.client.impl.sdk.DatabricksUCVolumeClient Maven / Gradle / Ivy
package com.databricks.jdbc.client.impl.sdk;
import static com.databricks.jdbc.driver.DatabricksJdbcConstants.VOLUME_OPERATION_STATUS_COLUMN_NAME;
import static com.databricks.jdbc.driver.DatabricksJdbcConstants.VOLUME_OPERATION_STATUS_SUCCEEDED;
import com.databricks.jdbc.client.IDatabricksUCVolumeClient;
import com.databricks.jdbc.commons.LogLevel;
import com.databricks.jdbc.commons.util.LoggingUtil;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
/** Implementation for DatabricksUCVolumeClient */
public class DatabricksUCVolumeClient implements IDatabricksUCVolumeClient {
private final Connection connection;
private static final String UC_VOLUME_COLUMN_NAME =
"name"; // Column name for the file names within a volume
private static final String UC_VOLUME_NAME =
"volume_name"; // Column name for the volume names within a schema
public DatabricksUCVolumeClient(Connection connection) {
this.connection = connection;
}
private String createListQuery(String catalog, String schema, String volume) {
return String.format("LIST '/Volumes/%s/%s/%s/'", catalog, schema, volume);
}
private String createShowVolumesQuery(String catalog, String schema) {
return String.format("SHOW VOLUMES IN %s.%s", catalog, schema);
}
private String createGetObjectQuery(
String catalog, String schema, String volume, String objectPath, String localPath) {
return String.format(
"GET '/Volumes/%s/%s/%s/%s' TO '%s'", catalog, schema, volume, objectPath, localPath);
}
private String createPutObjectQuery(
String catalog,
String schema,
String volume,
String objectPath,
String localPath,
boolean toOverwrite) {
return String.format(
"PUT '%s' INTO '/Volumes/%s/%s/%s/%s'%s",
localPath, catalog, schema, volume, objectPath, toOverwrite ? " OVERWRITE" : "");
}
private String createDeleteObjectQuery(
String catalog, String schema, String volume, String objectPath) {
return String.format("REMOVE '/Volumes/%s/%s/%s/%s'", catalog, schema, volume, objectPath);
}
public boolean prefixExists(String catalog, String schema, String volume, String prefix)
throws SQLException {
return prefixExists(catalog, schema, volume, prefix, true);
}
@Override
public boolean prefixExists(
String catalog, String schema, String volume, String prefix, boolean caseSensitive)
throws SQLException {
LoggingUtil.log(
LogLevel.DEBUG,
String.format(
"Entering prefixExists method with parameters: catalog={%s}, schema={%s}, volume={%s}, prefix={%s}, caseSensitive={%s}",
catalog, schema, volume, prefix, caseSensitive));
// Extract the sub-folder and append to volume to use LIST at the correct location, prefix is
// checked for after listing
int lastSlashIndex = prefix.lastIndexOf("/");
if (lastSlashIndex != -1) {
String folder = prefix.substring(0, lastSlashIndex);
volume = volume + "/" + folder;
prefix = prefix.substring(lastSlashIndex + 1);
}
String listFilesSQLQuery = createListQuery(catalog, schema, volume);
try (Statement statement = connection.createStatement()) {
ResultSet resultSet = statement.executeQuery(listFilesSQLQuery);
LoggingUtil.log(LogLevel.INFO, "SQL query executed successfully");
boolean exists = false;
while (resultSet.next()) {
String fileName = resultSet.getString("name");
if (fileName.regionMatches(
/* ignoreCase= */ !caseSensitive,
/* targetOffset= */ 0,
/* StringToCheck= */ prefix,
/* sourceOffset= */ 0,
/* lengthToMatch= */ prefix.length())) {
exists = true;
break;
}
}
return exists;
} catch (SQLException e) {
LoggingUtil.log(LogLevel.ERROR, "SQL query execution failed " + e);
throw e;
}
}
@Override
public boolean objectExists(
String catalog, String schema, String volume, String objectPath, boolean caseSensitive)
throws SQLException {
LoggingUtil.log(
LogLevel.INFO,
String.format(
"Entering objectExists method with parameters: catalog={%s}, schema={%s}, volume={%s}, objectPath={%s}, caseSensitive={%s}",
catalog, schema, volume, objectPath, caseSensitive));
// Extract the sub-folder and append to volume to use LIST at the correct location, objectName
// is checked for after listing
String objectName;
int lastSlashIndex = objectPath.lastIndexOf("/");
if (lastSlashIndex != -1) {
String folder = objectPath.substring(0, lastSlashIndex);
volume = volume + "/" + folder;
objectName = objectPath.substring(lastSlashIndex + 1);
} else {
objectName = objectPath;
}
String listFilesSQLQuery = createListQuery(catalog, schema, volume);
try (Statement statement = connection.createStatement()) {
ResultSet resultSet = statement.executeQuery(listFilesSQLQuery);
LoggingUtil.log(LogLevel.INFO, "SQL query executed successfully");
boolean exists = false;
while (resultSet.next()) {
String fileName = resultSet.getString(UC_VOLUME_COLUMN_NAME);
if (fileName.regionMatches(
/* ignoreCase= */ !caseSensitive,
/* targetOffset= */ 0,
/* StringToCheck= */ objectName,
/* sourceOffset= */ 0,
/* lengthToMatch= */ objectName.length())) {
exists = true;
break;
}
}
return exists;
} catch (SQLException e) {
LoggingUtil.log(LogLevel.ERROR, "SQL query execution failed " + e);
throw e;
}
}
public boolean objectExists(String catalog, String schema, String volume, String objectPath)
throws SQLException {
return objectExists(catalog, schema, volume, objectPath, true);
}
@Override
public boolean volumeExists(
String catalog, String schema, String volumeName, boolean caseSensitive) throws SQLException {
LoggingUtil.log(
LogLevel.INFO,
String.format(
"Entering volumeExists method with parameters: catalog={%s}, schema={%s}, volumeName={%s}, caseSensitive={%s}",
catalog, schema, volumeName, caseSensitive));
String showVolumesSQLQuery = createShowVolumesQuery(catalog, schema);
try (Statement statement = connection.createStatement()) {
ResultSet resultSet = statement.executeQuery(showVolumesSQLQuery);
LoggingUtil.log(LogLevel.INFO, "SQL query executed successfully");
boolean exists = false;
while (resultSet.next()) {
String volume = resultSet.getString(UC_VOLUME_NAME);
if (volume.regionMatches(
/* ignoreCase= */ !caseSensitive,
/* targetOffset= */ 0,
/* other= */ volumeName,
/* sourceOffset= */ 0,
/* len= */ volumeName.length())) {
exists = true;
break;
}
}
return exists;
} catch (SQLException e) {
LoggingUtil.log(LogLevel.ERROR, "SQL query execution failed " + e);
throw e;
}
}
public boolean volumeExists(String catalog, String schema, String volumeName)
throws SQLException {
return volumeExists(catalog, schema, volumeName, true);
}
@Override
public List listObjects(
String catalog, String schema, String volume, String prefix, boolean caseSensitive)
throws SQLException {
LoggingUtil.log(
LogLevel.INFO,
String.format(
"Entering listObjects method with parameters: catalog={%s}, schema={%s}, volume={%s}, prefix={%s}, caseSensitive={%s}",
catalog, schema, volume, prefix, caseSensitive));
// Extract the sub-folder and append to volume to use LIST at the correct location, prefix is
// checked for after listing
int lastSlashIndex = prefix.lastIndexOf("/");
if (lastSlashIndex != -1) {
String folder = prefix.substring(0, lastSlashIndex);
volume = volume + "/" + folder;
prefix = prefix.substring(lastSlashIndex + 1);
}
String listFilesSQLQuery = createListQuery(catalog, schema, volume);
try (Statement statement = connection.createStatement()) {
ResultSet resultSet = statement.executeQuery(listFilesSQLQuery);
LoggingUtil.log(LogLevel.INFO, "SQL query executed successfully");
List filenames = new ArrayList<>();
while (resultSet.next()) {
String fileName = resultSet.getString("name");
if (fileName.regionMatches(
/* ignoreCase= */ !caseSensitive,
/* targetOffset= */ 0,
/* StringToCheck= */ prefix,
/* sourceOffset= */ 0,
/* lengthToMatch= */ prefix.length())) {
filenames.add(fileName);
}
}
return filenames;
} catch (SQLException e) {
LoggingUtil.log(LogLevel.ERROR, "SQL query execution failed" + e);
throw e;
}
}
public List listObjects(String catalog, String schema, String volume, String prefix)
throws SQLException {
return listObjects(catalog, schema, volume, prefix, true);
}
public boolean getObject(
String catalog, String schema, String volume, String objectPath, String localPath)
throws SQLException {
LoggingUtil.log(
LogLevel.DEBUG,
String.format(
"Entering getObject method with parameters: catalog={%s}, schema={%s}, volume={%s}, objectPath={%s}, localPath={%s}",
catalog, schema, volume, objectPath, localPath));
String getObjectQuery = createGetObjectQuery(catalog, schema, volume, objectPath, localPath);
boolean volumeOperationStatus = false;
try (Statement statement = connection.createStatement()) {
ResultSet resultSet = statement.executeQuery(getObjectQuery);
LoggingUtil.log(LogLevel.INFO, "GET query executed successfully");
if (resultSet.next()) {
String volumeOperationStatusString =
resultSet.getString(VOLUME_OPERATION_STATUS_COLUMN_NAME);
volumeOperationStatus =
VOLUME_OPERATION_STATUS_SUCCEEDED.equals(volumeOperationStatusString);
}
} catch (SQLException e) {
LoggingUtil.log(LogLevel.ERROR, "GET query execution failed " + e);
throw e;
}
return volumeOperationStatus;
}
public boolean putObject(
String catalog,
String schema,
String volume,
String objectPath,
String localPath,
boolean toOverwrite)
throws SQLException {
LoggingUtil.log(
LogLevel.DEBUG,
String.format(
"Entering putObject method with parameters: catalog={%s}, schema={%s}, volume={%s}, objectPath={%s}, localPath={%s}, toOverwrite={%s}",
catalog, schema, volume, objectPath, localPath, toOverwrite));
String putObjectQuery =
createPutObjectQuery(catalog, schema, volume, objectPath, localPath, toOverwrite);
boolean volumeOperationStatus = false;
try (Statement statement = connection.createStatement()) {
ResultSet resultSet = statement.executeQuery(putObjectQuery);
LoggingUtil.log(LogLevel.INFO, "PUT query executed successfully");
if (resultSet.next()) {
String volumeOperationStatusString =
resultSet.getString(VOLUME_OPERATION_STATUS_COLUMN_NAME);
volumeOperationStatus =
VOLUME_OPERATION_STATUS_SUCCEEDED.equals(volumeOperationStatusString);
}
} catch (SQLException e) {
LoggingUtil.log(LogLevel.ERROR, "PUT query execution failed " + e);
throw e;
}
return volumeOperationStatus;
}
public boolean deleteObject(String catalog, String schema, String volume, String objectPath)
throws SQLException {
LoggingUtil.log(
LogLevel.DEBUG,
String.format(
"Entering deleteObject method with parameters: catalog={%s}, schema={%s}, volume={%s}, objectPath={%s}",
catalog, schema, volume, objectPath));
String deleteObjectQuery = createDeleteObjectQuery(catalog, schema, volume, objectPath);
boolean volumeOperationStatus = false;
try (Statement statement = connection.createStatement()) {
ResultSet resultSet = statement.executeQuery(deleteObjectQuery);
LoggingUtil.log(LogLevel.INFO, "SQL query executed successfully");
if (resultSet.next()) {
String volumeOperationStatusString =
resultSet.getString(VOLUME_OPERATION_STATUS_COLUMN_NAME);
volumeOperationStatus =
VOLUME_OPERATION_STATUS_SUCCEEDED.equals(volumeOperationStatusString);
}
} catch (SQLException e) {
LoggingUtil.log(LogLevel.ERROR, "SQL query execution failed " + e);
throw e;
}
return volumeOperationStatus;
}
}
