function initAndReserveDBConnection(req, callback) {
    var username = req.session.username;
    var password = req.session.password;

    if(!username || ! password) {
        callback(new Error("Bad username or password"))
        return;
    }

    var db = new JDBC(dbConfig(username, password))
    db.initialize(function(err) {
        if(err) {
            callback(err);
            return;
        }

        db.reserve(function(err, connObj) {
            if(err) {
                callback(err);
                return;
            }

            callback(null, connObj, db);
        })
    })
}

function releaseDBConnection(res, connObj, db, callback) {
    db.release(connObj, function(err) {
        if(err) {
            internalErrorResponse(res);
            return;
        }

        callback();
    })
}

function internalErrorResponse(res) {
    res
    .status(500)
    .end();
}

app.post("/name", function(req, res) {
    var obj = req.body;

    // init database
    initAndReserveDBConnection(req, (err, connObj, netezzadb) => {
        if(err) {
            internalErrorResponse(res);
            return;
        }

        // Do something with connObj...

        // Release the connection
        releaseDBConnection(res, connObj, netezzadb, function() {
            // If needed return data to client here
            /* exemple :

                res.json({
                    time: Date.now()
                })

            */
        })
    })
})