intkeygenerator/keyGeneratorSqlServer.js

int secuential primarykey generator for SQL Server

var db = require('mssql-helper');
var mssql = require('mssql');
var keyGenerator = require('./KeyGenerator');

var configured = false;

var context = {};

function setConfig(cfg){
	context.dbConfig = cfg;
	configured = true;
}

keyGenerator.setRangeReservationCallback(function (size, callback) {
	debugger;
	db.executeQuery(context, sqlUpdateNext, [{name: 'size', value : size}], function(err, recordset){
		if (err) {
			callback(err, null);
		} else {
			callback(err, recordset[0].next);
		}
	});
});

function getKeyGenerator(){
	if (!configured) throw new Error('Debe llamar antes a setConfig');
	return keyGenerator;
}

module.exports = { setConfig : setConfig, getKeyGenerator : getKeyGenerator };

var sqlUpdateNext = 'update KeyGenerator SET next = next + @size OUTPUT Deleted.*';