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

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

'use strict';

var connect = require('../db/connect');
var 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) {
    var 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 = [];
};