use of com.thinkbiganalytics.discovery.model.CatalogTableSchema in project kylo by Teradata.
the class DataSourceController method createJdbcTableDataSet.
/**
* Gets the schema of the specified table using the specified data source.
*
* @param dataSourceId the data source id
* @param tableName the table name
* @param schema the schema name, or {@code null} to search all schemas
* @return the table and field details
*/
@POST
@Path("{id}/tables/{tableName}/dataset")
@Produces(MediaType.APPLICATION_JSON)
@ApiOperation(value = "Gets the schema of the specified table.", notes = "Connects to the database specified by the data source.")
@ApiResponses({ @ApiResponse(code = 200, message = "Returns the table schema.", response = DataSetWithTableSchema.class), @ApiResponse(code = 403, message = "Access denied.", response = RestResponseStatus.class), @ApiResponse(code = 404, message = "A JDBC data source with that id does not exist.", response = RestResponseStatus.class), @ApiResponse(code = 500, message = "NiFi or the database are unavailable.", response = RestResponseStatus.class) })
public Response createJdbcTableDataSet(@PathParam("id") final String dataSourceId, @PathParam("tableName") final String tableName, @QueryParam("schema") final String schema) {
// TODO Verify user has access to data source
// Require admin permission if the results should include unencrypted credentials.
final boolean encryptCredentials = true;
accessController.checkPermission(AccessController.SERVICES, encryptCredentials ? FeedServicesAccessControl.ACCESS_DATASOURCES : FeedServicesAccessControl.ADMIN_DATASOURCES);
DataSetWithTableSchema dataSetWithTableSchema = null;
boolean hasAccess = false;
try {
// ensure the user can read teh datasource
DataSource encryptedSource = metadataService.read(() -> {
return findDataSource(dataSourceId, true);
});
hasAccess = encryptedSource != null;
if (hasAccess) {
// fetch the datasource as a service account to get the creds.
DataSource dataSource = metadataService.read(() -> {
return findDataSource(dataSourceId, false);
}, MetadataAccess.SERVICE);
// describe the datasource and table
CatalogTableSchema tableSchema = tableManager.describeTable(dataSource, schema, tableName);
if (tableSchema != null) {
DataSet dataSet = new DataSet();
// assign the datasource to this dataset with encrypted credentials
dataSet.setDataSource(encryptedSource);
String fullTableName = (tableSchema.getTable() != null) ? tableSchema.getTable().getQualifiedIdentifier() : HiveUtils.quoteIdentifier(tableSchema.getSchemaName(), tableSchema.getName());
dataSet.setTitle(tableSchema.getSchemaName() + "." + tableSchema.getName());
DefaultDataSetTemplate defaultDataSetTemplate = DataSetUtil.mergeTemplates(dataSet);
List<String> paths = defaultDataSetTemplate.getPaths();
String format = defaultDataSetTemplate.getFormat();
Map<String, String> options = defaultDataSetTemplate.getOptions();
if (options == null) {
options = new HashMap<>();
}
if ("hive".equalsIgnoreCase(format.toLowerCase())) {
if (paths == null) {
paths = new ArrayList<>();
}
paths.add(fullTableName);
}
options.put("dbtable", fullTableName);
dataSet.setFormat(format);
dataSet.setPaths(paths);
dataSet.setOptions(options);
DataSet dataSet1 = dataSetService.findOrCreateDataSet(dataSet, encryptCredentials);
dataSetWithTableSchema = new DataSetWithTableSchema(dataSet1, tableSchema);
} else {
if (log.isErrorEnabled()) {
log.error("Failed to describe tables for schema [" + schema + "], table [" + tableName + "], dataSource [" + dataSourceId + "] ");
}
final RestResponseStatus status = new RestResponseStatus.ResponseStatusBuilder().message(getMessage("catalog.datasource.describeTable.error", tableName, schema)).url(request.getRequestURI()).buildError();
throw new InternalServerErrorException(Response.serverError().entity(status).build());
}
// });
} else {
// no acceess
final RestResponseStatus status = new RestResponseStatus.ResponseStatusBuilder().message(getMessage("catalog.datasource.forbidden")).url(request.getRequestURI()).buildError();
throw new InternalServerErrorException(Response.serverError().entity(status).build());
}
} catch (Exception e) {
if (exceptionTransformer.causesInChain(e)) {
throw new ThriftConnectionException(e);
}
final RestResponseStatus status = new RestResponseStatus.ResponseStatusBuilder().message(getMessage("catalog.datasource.describeTable.error", tableName, schema)).url(request.getRequestURI()).buildError();
throw new InternalServerErrorException(Response.serverError().entity(status).build());
}
return Response.ok(dataSetWithTableSchema).build();
}
use of com.thinkbiganalytics.discovery.model.CatalogTableSchema in project kylo by Teradata.
the class DefaultCatalogTableManager method describeTable.
@Nonnull
@Override
public CatalogTableSchema describeTable(@Nonnull final DataSource dataSource, @Nullable final String schemaName, @Nullable final String tableName) throws SQLException {
final DataSetTemplate template = DataSourceUtil.mergeTemplates(dataSource);
if (Objects.equals("hive", template.getFormat())) {
final TableSchema tableSchema = hiveMetastoreService.getTable(schemaName, tableName);
final CatalogTableSchema catalogTableSchema = new CatalogTableSchema(tableSchema);
// Get table metadata
if (StringUtils.isNotEmpty(tableSchema.getName())) {
final DefaultJdbcTable jdbcTable = new DefaultJdbcTable(tableSchema.getName(), "TABLE");
jdbcTable.setCatalog(tableSchema.getDatabaseName());
jdbcTable.setCatalog(tableSchema.getDatabaseName());
jdbcTable.setRemarks(tableSchema.getDescription());
jdbcTable.setSchema(tableSchema.getSchemaName());
jdbcTable.setCatalogSeparator(".");
jdbcTable.setIdentifierQuoteString("`");
catalogTableSchema.setTable(createTable(jdbcTable));
}
return catalogTableSchema;
} else if (Objects.equals("jdbc", template.getFormat())) {
return isolatedFunction(template, schemaName, (connection, schemaParser) -> {
final javax.sql.DataSource ds = new SingleConnectionDataSource(connection, true);
final DBSchemaParser tableSchemaParser = new DBSchemaParser(ds, new KerberosTicketConfiguration());
final TableSchema tableSchema = tableSchemaParser.describeTable(schemaName, tableName);
if (tableSchema != null) {
// Get table metadata
final DefaultJdbcTable jdbcTable = new DefaultJdbcTable(tableSchema.getName(), "TABLE");
jdbcTable.setCatalog(tableSchema.getDatabaseName());
jdbcTable.setCatalog(tableSchema.getDatabaseName());
jdbcTable.setRemarks(tableSchema.getDescription());
jdbcTable.setSchema(tableSchema.getSchemaName());
jdbcTable.setMetaData(connection.getMetaData());
// Return table schema
final CatalogTableSchema catalogTableSchema = new CatalogTableSchema(tableSchema);
catalogTableSchema.setTable(createTable(jdbcTable));
return catalogTableSchema;
} else {
return null;
}
});
} else {
throw new IllegalArgumentException("Unsupported format: " + template.getFormat());
}
}
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