@sap/xsodata/lib/utils/tableCleanup.js

Expose data from a HANA database as OData V2 service with help of .xsodata files.

'use strict';

const connect = require('../db/connect');
const statementProcessor = require('./../sql/statementProcessor');

/**
 * Assert existing temp table statements. If there are still existing temp table
 * statements we have to clean up the session before we exist.
 *
 * @param {Object} context The odata context
 * @param {Next} next The callback to be called when finish processing
 */
exports.assertCleanTempTables = function assertCleanTempTables(context, next) {
    let statements, statementStr;

    context.logger.info('xsodata', 'assertCleanTempTables');

    statements = context.networkContext.cleanSessionTruncateContainer.concat(
        context.networkContext.cleanSessionDropContainer
    );

    if (statements.length > 0) {
        statementStr = JSON.stringify(statements, null, 2);
        context.logger.info(
            'xsodata',
            'assertCleanTempTables - remaining temp tables found: ' +
                statementStr
        );
        context.logger.info(
            'xsodata',
            'assertCleanTempTables - starting clean up remaining temp tables'
        );

        statementProcessor.execTempTableStatements(
            context,
            statements,
            function done(err) {
                if (err) {
                    context.logger.silly(
                        'assertCleanTempTables',
                        'Error during cleanup'
                    );
                    return connect.dbRollback(
                        context,
                        context.db.client,
                        function (errDB) {
                            return next(errDB, context);
                        }
                    );
                }

                context.logger.info(
                    'xsodata',
                    'assertCleanTempTables - do commit'
                );
                return context.db.client.commit(function (errDB) {
                    if (errDB) {
                        context.logger.silly(
                            'assertCleanTempTables',
                            'Commit failed'
                        );
                    }
                    return next(errDB, context);
                });
            }
        );
    } else {
        next(null, context);
    }
};

exports.emptyLists = (context) => {
    context.networkContext.cleanSessionTruncateContainer = [];
    context.networkContext.cleanSessionDropContainer = [];
};